tag:blogger.com,1999:blog-56469742024-03-07T09:56:48.737+00:00 > Phil's technical blog - Broadcast engineering and IT related links and stuff. Maybe some music, films and other things.Unknownnoreply@blogger.comBlogger1204125tag:blogger.com,1999:blog-5646974.post-15975400410666097602022-11-08T16:13:00.006+00:002022-12-30T13:19:10.170+00:00The EIZO CG2700X UHD colour accurate monitor<p style="text-align: justify;"><span style="caret-color: rgb(0, 0, 0);"><span style="font-family: inherit;">I took delivery of my demo CG2700X Eizo monitor over the weekend and ran it through its paces; suffice to say I am pretty impressed. </span></span></p><span style="caret-color: rgb(0, 0, 0); text-size-adjust: auto;"><div style="text-align: justify;"><span style="font-family: inherit;">It’s a 27” IPS (so modern LCD) 3820x2160 res panel (so not full-4K) but good for TV, and notably smaller than the 31” FSIs and EIZOs so might fit on a QC desk better than the big guys.</span></div></span><div><div style="text-align: justify;"><br /></div><span style="caret-color: rgb(0, 0, 0); font-family: inherit; text-size-adjust: auto;"><div class="separator" style="clear: both; text-align: justify;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiySSR1ca4mdPvNsHyxUSUKdUTw68Sd5xO5r8rFt017ujTmqAil3T9VQbxz9CQ241anCrFiKTUGlWG1vmNe0tuAL3DnPKKvrFbp59MssWlNDhB6OOwq4vh3kgr2Q28O4KN4qexYoekTUNyKVgQOpKHHtp_n9reMEJF5aZ6yTerXx0sVMyOPD1c/s1166/Screenshot%202022-11-08%20at%2015.59.17.png" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="666" data-original-width="1166" height="229" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiySSR1ca4mdPvNsHyxUSUKdUTw68Sd5xO5r8rFt017ujTmqAil3T9VQbxz9CQ241anCrFiKTUGlWG1vmNe0tuAL3DnPKKvrFbp59MssWlNDhB6OOwq4vh3kgr2Q28O4KN4qexYoekTUNyKVgQOpKHHtp_n9reMEJF5aZ6yTerXx0sVMyOPD1c/w400-h229/Screenshot%202022-11-08%20at%2015.59.17.png" width="400" /></a></div></span><div style="text-align: justify;"><br /></div><span style="font-family: inherit;"><div style="text-align: justify;"><span style="font-family: inherit;">So, first thing is to make a matching profile for the Klein K10A tri-stim probe; I've often written before how a photometer is only as good as the profile you make for it with a spectroradiometer - a CR250 in my case.</span></div></span><div style="text-align: justify;"><span style="font-family: inherit;"><br /></span></div><div><div class="separator" style="clear: both; text-align: justify;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiDLb4_CV9R1VQ1HQgm-jOUKKUM23QCEl9j2GGjYlH5C_5IdFyFXEklcAieHdzEyC8azHcIE_1mvdeeIAdboKhMcAnMklVeB8vMSblDWeP4-dVE3aCOz4aFAIvBq6jEOxo0D43RK79WyTlpE2NSu9JfG8Gp4F3AXCb9pW3DTK6WBW2p0F8KbFo/s1740/Screenshot%202022-11-08%20at%2015.57.22.png" style="margin-left: 1em; margin-right: 1em;"><span style="font-family: inherit;"><img border="0" data-original-height="1132" data-original-width="1740" height="260" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiDLb4_CV9R1VQ1HQgm-jOUKKUM23QCEl9j2GGjYlH5C_5IdFyFXEklcAieHdzEyC8azHcIE_1mvdeeIAdboKhMcAnMklVeB8vMSblDWeP4-dVE3aCOz4aFAIvBq6jEOxo0D43RK79WyTlpE2NSu9JfG8Gp4F3AXCb9pW3DTK6WBW2p0F8KbFo/w400-h260/Screenshot%202022-11-08%20at%2015.57.22.png" width="400" /></span></a></div><div style="text-align: justify;"><br /></div><span style="font-family: inherit;"><div style="text-align: justify;"><span style="font-family: inherit;">Interestingly the spectral power distribution is different from the engineering sample I had half a day with over the summer - Eizo tell me they changed the polariser for production units.</span></div></span></div><div style="text-align: justify;"><span style="font-family: inherit;">So, for calibration I profiled the display in it's native state (so no gamut imposed by the monitor, all colours as saturated as it will make them).</span></div><div style="text-align: justify;"><span style="font-family: inherit;"><br /></span></div><div><div class="separator" style="clear: both; text-align: justify;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEigsYkCrriBZcvnbBZgTEWNEDY2YiSCbfr8SHz015Zhj39_8xNCWlsLua5tAJLvDlV-4n8NsOUoXBvJjOHSXHVyw6LhD5rNhISoh_PhoNLk2ehJUWa1pPkFQi0CsACzCTKvvpzrfRyknayHOOFsz6ThA_RSa86Vza73-p9Yq0SKoYTBjjhvfFQ/s1338/Screenshot%202022-11-07%20102144.jpg" style="margin-left: 1em; margin-right: 1em;"><span style="font-family: inherit;"><img border="0" data-original-height="1338" data-original-width="1270" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEigsYkCrriBZcvnbBZgTEWNEDY2YiSCbfr8SHz015Zhj39_8xNCWlsLua5tAJLvDlV-4n8NsOUoXBvJjOHSXHVyw6LhD5rNhISoh_PhoNLk2ehJUWa1pPkFQi0CsACzCTKvvpzrfRyknayHOOFsz6ThA_RSa86Vza73-p9Yq0SKoYTBjjhvfFQ/w380-h400/Screenshot%202022-11-07%20102144.jpg" width="380" /></span></a></div><div style="text-align: justify;"><br /></div><span style="font-family: inherit;"><div style="text-align: justify;"><span style="font-family: inherit;">From that (which is 17^3 - around five thousand colours) I made a rec.709 LUT - 10</span><span style="caret-color: rgb(0, 0, 0); font-family: inherit; text-size-adjust: auto;">0Cd/m</span><span style="caret-color: rgb(0, 0, 0); font-family: inherit; text-size-adjust: auto;"><sup>2</sup></span></div></span><div style="text-align: justify;"><br /></div><span style="font-family: inherit; text-size-adjust: auto;"><div class="separator" style="caret-color: rgb(0, 0, 0); clear: both; text-align: justify;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgSBmFekg7K3BQSFchblCHbfOhn_b4nIK3jzHkgRP80T4rV95Ea-wnst2ER3dYpcRIoFOophFSHHo7NBDh62RRSxuu_-eRiJTViiYkgN9lVBpuBLKLpDK2ZAFKOQAzrCzqvckE_93YFG8TitQexkM4S342ofZVG5htcvQV1tn-in8lrRDkrlsU/s910/Fg07gR4WAAImfZ_.jpeg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="416" data-original-width="910" height="183" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgSBmFekg7K3BQSFchblCHbfOhn_b4nIK3jzHkgRP80T4rV95Ea-wnst2ER3dYpcRIoFOophFSHHo7NBDh62RRSxuu_-eRiJTViiYkgN9lVBpuBLKLpDK2ZAFKOQAzrCzqvckE_93YFG8TitQexkM4S342ofZVG5htcvQV1tn-in8lrRDkrlsU/w400-h183/Fg07gR4WAAImfZ_.jpeg" width="400" /></a></div><div style="caret-color: rgb(0, 0, 0); text-align: justify;"><span style="caret-color: rgb(0, 0, 0); text-size-adjust: auto;"><br /></span></div><div style="text-align: justify;"><span><span style="text-size-adjust: auto;">Rather splendidly, even though this is a brand new model, ColourSpace was able to talk to the patch generator inside.</span></span></div><div style="caret-color: rgb(0, 0, 0); text-align: justify;"><br /></div></span></div><div style="text-align: justify;"><span style="font-family: inherit;"><br /></span></div><div class="separator" style="clear: both; text-align: justify;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgIkKeeAHe0GxVLjQEPNeUX_qZoy9B3QhQC5GUTamJ6hgAmKVIhLtXso-MoV0QRbL93MuZFFDuexLJgWDMNv51JbZKFC6qpfrg68NLiQnkj8kjt_VXP0KgWM2cMgvQHF_pmKP309bfKcaJzk3qEZ-BA0-4tC-ncO54y0Xzi_YQ_PYkAcf_GV08/s1298/Fg07hkTWABA5cNY.jpeg" style="margin-left: 1em; margin-right: 1em;"><span style="font-family: inherit;"><img border="0" data-original-height="1298" data-original-width="1230" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgIkKeeAHe0GxVLjQEPNeUX_qZoy9B3QhQC5GUTamJ6hgAmKVIhLtXso-MoV0QRbL93MuZFFDuexLJgWDMNv51JbZKFC6qpfrg68NLiQnkj8kjt_VXP0KgWM2cMgvQHF_pmKP309bfKcaJzk3qEZ-BA0-4tC-ncO54y0Xzi_YQ_PYkAcf_GV08/w379-h400/Fg07hkTWABA5cNY.jpeg" width="379" /></span></a></div><div style="text-align: justify;"><br /></div><div class="separator" style="clear: both; text-align: justify;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgrow9me4SW0qyZ-rYpCCEyUTzXJQdAQu7JLLbXYifvFFdl--VSqWUZpKL6WpQApiENQFfk8SzXGH6IbMw2-5lgyScjS6KpPpxk2xNAN-IESZLDTuPur95kKUuukGbYGfY1Sbsh0l7aS4u-33nFRJIHphC-tXHbi-17QxY3ogoI-iXIAA3fV-A/s1822/Fg07jP-WIAASRIB.jpeg" style="margin-left: 1em; margin-right: 1em;"><span style="font-family: inherit;"><img border="0" data-original-height="1212" data-original-width="1822" height="266" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgrow9me4SW0qyZ-rYpCCEyUTzXJQdAQu7JLLbXYifvFFdl--VSqWUZpKL6WpQApiENQFfk8SzXGH6IbMw2-5lgyScjS6KpPpxk2xNAN-IESZLDTuPur95kKUuukGbYGfY1Sbsh0l7aS4u-33nFRJIHphC-tXHbi-17QxY3ogoI-iXIAA3fV-A/w400-h266/Fg07jP-WIAASRIB.jpeg" width="400" /></span></a></div><div style="text-align: justify;"><br /></div><div><div style="text-align: justify;">It is a single-panel LCD so will not have the dark, inky-blacks you’re used to from a Sony HX-310 or Eizo Prominence (but you could buy a dozen of these displays for the price of one of those!).</div><div style="text-align: justify;"><br /></div><span style="caret-color: rgb(0, 0, 0); font-family: inherit; text-size-adjust: auto;"><div style="text-align: left;"><span style="font-family: inherit; text-size-adjust: auto;">In terms of wide-colour-gamut/HDR it has decent emulation for HLG and DolbyVision, topping out at about 550Cd/m</span><span style="font-family: inherit; text-size-adjust: auto;"><sup>2</sup></span><span style="font-family: inherit; text-size-adjust: auto;"><span class="Apple-converted-space"> </span>(unlike the full 1,000Cd/m</span><span style="font-family: inherit; text-size-adjust: auto;"><sup>2</sup></span><span style="font-family: inherit; text-size-adjust: auto;"><span class="Apple-converted-space"> </span>you expect from an Eizo Prominence or Sony HX-310). So could be used for edit/QC/ingest etc. for those standards, but probably not for final grade/mastering.</span></div></span></div><div style="text-align: left;"><span style="font-family: inherit;"><br /></span></div><div><div class="separator" style="clear: both; text-align: left;"><span style="font-family: inherit; margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg-uiHXe851yORDx4Eu5Ra72X7afgGJg2we4y-QLtKzV3TZK8I-7AxvYNGcEM8Fy3NchuIYT6RTad9aPTiDMvz7QbLjHXyguE-XQZfFXLRmLThuwXGeQN-tq383RzRlycm7RBE1xoUjc4aufXWPP-k_EdGPoFEnACh22v1nTUQhLWatd_mRAqE/w480-h640/IMG_6815.jpeg" width="480" /></span></div><div style="text-align: left;"><br /></div><span style="text-size-adjust: auto;"><div style="text-align: left;"><i>first column is 10-bit values, second column is light levels</i></div><div style="text-align: justify;"><br /></div></span><div style="text-align: justify;"><span style="caret-color: rgb(0, 0, 0); font-family: inherit;"><b>Cages </b>- still important for broadcast QC types; It has three sets of markers; they can be independently sized and positioned. It has presets for all the common aspect ratios and action/graphics safe areas, but you can set them as you want. Y</span>ou can set all line widths from one to six pixels and choose the colours independently.</div><div style="text-align: justify;">I’m not sure if it could be any more flexible?! Aside from circular cages, that is!</div><div style="text-align: justify;"><br /></div><div style="text-align: justify;"><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg4wHq5lGsh4IBtPIaYjKMCZqTekiXmKK5EOFI2A0lmHS2nj_1HVqKMdENpHqgFiqXYstddTli5ZbnUxsoRx7K685o4asEowmqoaCHo56bNdEG6m-cOV3adYEU_B5YvvCGYO4Z04hRUCy8c-pD6BjHVnOW8Y_bZ93CRY2NokIQ4ureE-Xe9CB0/s640/thumbnail_image003.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" data-original-height="430" data-original-width="640" height="215" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg4wHq5lGsh4IBtPIaYjKMCZqTekiXmKK5EOFI2A0lmHS2nj_1HVqKMdENpHqgFiqXYstddTli5ZbnUxsoRx7K685o4asEowmqoaCHo56bNdEG6m-cOV3adYEU_B5YvvCGYO4Z04hRUCy8c-pD6BjHVnOW8Y_bZ93CRY2NokIQ4ureE-Xe9CB0/s320/thumbnail_image003.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhK1yrTfPZgdAhZ-j_U5siDDadM8-RLnVaZbOYA5i-7cnxAry-P7tKUmp-2_NNumbtRAvpJHqjcOHKkKgdq56eBj5cr7HdFLs6-ggyqqm8tJAqFiP94f6KFhwIcxRCqkcw02_9K7CbnPV0bm4IsK8OUTlfOhrSAMI0AjrqmFlantIAufgxfnmU/s640/image001.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" data-original-height="480" data-original-width="640" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhK1yrTfPZgdAhZ-j_U5siDDadM8-RLnVaZbOYA5i-7cnxAry-P7tKUmp-2_NNumbtRAvpJHqjcOHKkKgdq56eBj5cr7HdFLs6-ggyqqm8tJAqFiP94f6KFhwIcxRCqkcw02_9K7CbnPV0bm4IsK8OUTlfOhrSAMI0AjrqmFlantIAufgxfnmU/s320/image001.jpg" width="320" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh7d6LtWr2Tv0AoPZujZi94uLG1z0wjaRo8xPIcXIsRegVtjVOf503c28iNN90QF7p4XF5elpJFVTUDnRMHXv0ieZrOG0CpWOLHomztlCz9KNZOk2BxY7H8vA2xBRkZs2Y-0D08QCmnfZmqr52_21gHshU4QhT0gRmABXmyUvhJK7l5G1X0j80/s640/image002.jpg" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" data-original-height="432" data-original-width="640" height="216" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh7d6LtWr2Tv0AoPZujZi94uLG1z0wjaRo8xPIcXIsRegVtjVOf503c28iNN90QF7p4XF5elpJFVTUDnRMHXv0ieZrOG0CpWOLHomztlCz9KNZOk2BxY7H8vA2xBRkZs2Y-0D08QCmnfZmqr52_21gHshU4QhT0gRmABXmyUvhJK7l5G1X0j80/s320/image002.jpg" width="320" /></a></div><br /><span style="caret-color: rgb(0, 0, 0); font-family: inherit;"><br /></span></div><div style="text-align: justify;"><span style="caret-color: rgb(0, 0, 0); font-family: inherit;"><br /></span></div><div style="text-align: justify;"><span style="caret-color: rgb(0, 0, 0); font-family: inherit;"><br /></span></div><div style="text-align: justify;"><span style="caret-color: rgb(0, 0, 0); font-family: inherit;"><br /></span></div><div style="text-align: justify;"><span style="caret-color: rgb(0, 0, 0); font-family: inherit;"><br /></span></div><div style="text-align: justify;"><span style="caret-color: rgb(0, 0, 0); font-family: inherit;"><br /></span></div><div style="text-align: justify;"><span style="caret-color: rgb(0, 0, 0); font-family: inherit;"><br /></span></div><div style="text-align: justify;"><span style="caret-color: rgb(0, 0, 0); font-family: inherit;"><br /></span></div><div style="text-align: justify;"><span style="caret-color: rgb(0, 0, 0); font-family: inherit;"><br /></span></div><div style="text-align: justify;"><span style="caret-color: rgb(0, 0, 0); font-family: inherit;"><br /></span></div><div style="text-align: justify;"><span style="caret-color: rgb(0, 0, 0); font-family: inherit;"><br /></span></div><div style="text-align: justify;"><span style="caret-color: rgb(0, 0, 0); font-family: inherit;"><br /></span></div><div style="text-align: justify;"><span style="caret-color: rgb(0, 0, 0); font-family: inherit;"><br /></span></div><div style="text-align: justify;"><span style="caret-color: rgb(0, 0, 0); font-family: inherit;">My demo unit is safely in a flight case and you guys were on the list for offering it to for assessment; you’re welcome to have it for a few days and I will arrive with it to demo some footage.</span></div></div><div style="text-align: justify;"><br /></div></div>Unknownnoreply@blogger.com1tag:blogger.com,1999:blog-5646974.post-1635683668374336122022-05-20T17:14:00.005+01:002023-05-12T11:20:30.962+01:00Why I wouldn't buy a Sony BVM-HX310 in 2022 (if it was my money)<p style="text-align: justify;">I wrote something similar in 2018 - see <a href="http://philtechnicalblog.blogspot.com/2018/05/why-i-wouldnt-buy-sony-bvm-x300-in-2018.html" target="_blank">Why I wouldn't buy a Sony BVM-X300 in 2018 (if it was my money)</a> which was more of a comparison of OLEDs for HDR monitors vs. dual-layer IPS panels (and specifically the gen.1 Eizo Prominence; the CG3145).</p><p style="text-align: justify;">Spin forward four years and I'm no longer working for a reseller but doing my own thing (probably a third of which is colour - calibrating and building LUTs) and I've recently <a href="https://www.linkedin.com/posts/phcrawley_media-engineers-ltd-are-very-proud-to-have-activity-6904814905267224576-sKn9/" target="_blank">become an Eizo reseller myself </a>(full disclosure!). </p><p style="text-align: justify;">There are essentially three ways you can hit the requirement for HDR in a monitor - and I am surprised how for some people in the industry it is still an alien concept and yet for others it's 100% required. You have to be able to achieve 1,000 Cd/m<sup>2</sup> peak white, a reliable D65 white point, ideally >80% of <a href="https://en.wikipedia.org/wiki/Rec._2020" target="_blank">rec.2020 colour space</a> and the SMPTE 2084 EOTF (the PQ curve), along with HLG and maybe even SLog3 and CLog2 (although those ones are really only occasionally needed on set). BUT, most importantly is good black performance as dynamic range is the difference between the lowest difference that can be faithfully represented and the peak light output. Dolby says this should be > 800,000:1 - you <i>really need</i> those dark, inky blacks.</p><p></p><ul style="text-align: left;"><li><b>OLED</b> - these displays have no trouble with proper blacks (just turn off the sub-pixel elements and no light is output) although the reliability of OLEDs as they approach black is problematic. OLEDs also suffer burn-in - see the 2018 blog for more.</li><li><b>FALD LCDs </b>- like the Apple XDR and others you can modulate the LED backlight elements in an effort to overcome LCD's failing of letting light leak past the TFT sub-pixels; you can never get good blacks from a single layer LCD (IPS technology or otherwise) so maybe shut-down the light from the backlight when you need black. The problem with this is that the LED backlight array is never as hi-res as the display panel and so at hard black-white transitions you get a halo effect; very noticeable on star-fields and the like. It's why even the very best Samsung TVs don't look as good as LG and Panasonic OLEDs. In the case of the Apple XDR the resolution is nearly 20Mpixels but it has only ~500 modulated backlight elements.</li><li><b>Dual-layer IPS-LCD</b> - Panasonic manufacture a dual-IPS display assembly (4096x2160 resolution) with backlight that the Sony BVM-HX310 and the Eizo CG3146 Prominence both use. The benefit of having two IPS panels is that any light that leaks through the first will definately be caught by the second. In practise this givens those dark, inky blacks that you normally only get from OLED. Turn off the lights in the room, put up a full-frame black field and you really can't see where the bezel finishes and the screen starts, if you've never seen an LCD doing that well with black you'll be suprised.</li></ul><div style="text-align: justify;">So, you might think that the choice between Sony and Eizo would be just down to brand loyalty or price (the Sony does list for a few thousand more than the Eizo, but nobody ever got fired for buying a Sony!). However, the Eizo is not just a Sony with a different badge; for my money it improves thus;</div><div style="text-align: left;"><ol style="text-align: left;"><li><b>Colour workflow</b> – when I have to calibrate an HX310 (or X300) the client will typically say “…we need to have it ready for 709, DCI-P3, DolbyVision (2084/PQ) and HLG” – with a Sony that is the best part of a morning’s work with lots of adjusting bias and gain values, making measurements and re-adjusting; more akin to a 1990s CRT. The Prominence is an entirely LUT-driven monitor and to set one up for those four standards takes ~15 minutes. Even standards that the monitor does not support out of the box (Clog2 or Slog3 as examples for camera monitoring) can be easily added with ColourSpace by uploading into one of the spare LUT slots. Closed-loop calibration with either ColourSpace or Eizo’s (free) ColourNavigator 7 software is automated and quick (like things should be in the 21st century!)</li><li><b>Warrantee</b> – the Prominence has a five-year on-site replacement guarantee. If your CG3146 fails four years and eleven months after purchase Eizo will ship a replacement and repair/replace yours free. This includes colour accuracy and faulty pixels (try and get Sony to stand by a two-year-old HX310…!) - I asked my man at Eizo how many times they've had to break out the stand-by monitor; "...we haven't yet had to" - no failed Eizo Prominence monitors in the UK in five years! You can't say that about Sony's.</li><li><b>Uniformity</b> – I have a customer who has had to send an HX310 back due to poor (i.e. outside EBU 3325 specification) luminance uniformity. The Prominence has <a href="https://www.eizoglobal.com/products/coloredge/cg3146/index.html#04" target="_blank">Eizo’s DUE </a>(digital uniformity equaliser) which is configured at the factory to give better than delta-0.5 L u’ v’ (as measured on CIE1976) across the whole panel. - here are the measurements taken off an out-of-the-box HX310 a few months ago;</li></ol><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiX6aiwoCNj6yyo4IIllA-Zt_2DqGa8Wl3oRexFmTqeiq444lGkrDmH-NtVSlFubV7HsbIAbfos5ZgC4hQCjhzk_iXe-iiW70kQrZs999a5yu75nOJkfU1TCncZZJ6VEbHEjXGejY5NRj8FZI8OuPFRHOIr8JjXNddxHRx36ujBWu3xP7jYKKA/s3685/!cid_D5063274-842F-426C-9A76-FC218F9AF78C.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2764" data-original-width="3685" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiX6aiwoCNj6yyo4IIllA-Zt_2DqGa8Wl3oRexFmTqeiq444lGkrDmH-NtVSlFubV7HsbIAbfos5ZgC4hQCjhzk_iXe-iiW70kQrZs999a5yu75nOJkfU1TCncZZJ6VEbHEjXGejY5NRj8FZI8OuPFRHOIr8JjXNddxHRx36ujBWu3xP7jYKKA/w400-h300/!cid_D5063274-842F-426C-9A76-FC218F9AF78C.jpg" width="400" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjGIXBNMMZSX6z26KOTMBqSPHtpunltPosjzevNNXkEVm2oLKl720iD-0RI4J4avNf__Z1e9UeJFRrFdi11W91CGsRm5XCFK_LIuk15WgolxbFEi9kRbTGU0ZURgT0uazoP6s4GpC_oVh9PI4ujqbPpQ4fUiixtEhItH6qEbaJdhe7LfcazGd0/s1703/!cid_B34E6767-5AF4-4A8B-A49B-F9C5A3E25953.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1703" data-original-width="1125" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjGIXBNMMZSX6z26KOTMBqSPHtpunltPosjzevNNXkEVm2oLKl720iD-0RI4J4avNf__Z1e9UeJFRrFdi11W91CGsRm5XCFK_LIuk15WgolxbFEi9kRbTGU0ZURgT0uazoP6s4GpC_oVh9PI4ujqbPpQ4fUiixtEhItH6qEbaJdhe7LfcazGd0/w422-h640/!cid_B34E6767-5AF4-4A8B-A49B-F9C5A3E25953.jpg" width="422" /></a></div><div class="separator" style="clear: both; text-align: justify;"><i>(before you comment, I know these are CIE1931 values in x y Y) -</i> for proper uniformity measurements you need to do CIE1976 L u' v' - I did convert these before calculating the euclidean distance between patches on the gamut. These give rise to a large-scale luma uniformity error >5% which exceeds <span style="text-align: left;">SMPTE 3325's spec (which</span><span style="text-align: left;"> </span><a href="https://tech.ebu.ch/docs/tech/tech3325.pdf" style="text-align: left;" target="_blank">is here</a>)</div><div class="separator" style="clear: both; text-align: justify;"><br /></div><div class="separator" style="clear: both; text-align: justify;">As an aside here is a grab from another bit of monitor uniformity work I did last year;</div><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiETCOVUiaziYPaeE81nDDmZ-WIrKQMeJf7Bx2EN5e72L34xXgbP5UjpWZVhd_W1pwHuxvLX6Y9Lt2A0kkK0ORu-J4oBX9Twft8XjzJYEV6fNUfEHQyDa1veTjPI7Qh8aF9t4kw4Hmvl6obQBczvFZG4rHSAbWKvQTjDh3W57FrXpQeC2kqUKk/s833/Capture13.JPG" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="833" data-original-width="680" height="640" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiETCOVUiaziYPaeE81nDDmZ-WIrKQMeJf7Bx2EN5e72L34xXgbP5UjpWZVhd_W1pwHuxvLX6Y9Lt2A0kkK0ORu-J4oBX9Twft8XjzJYEV6fNUfEHQyDa1veTjPI7Qh8aF9t4kw4Hmvl6obQBczvFZG4rHSAbWKvQTjDh3W57FrXpQeC2kqUKk/w522-h640/Capture13.JPG" width="522" /></a></div><div style="text-align: justify;">Anyway, I have a demo CG3146 which I can leave with you for a week (along with lots of hero HDR footage that you can playback off my BlackMagic Hyperdeck 4K - Arri's camera reel, BBC's HLG and Eizo's demo footage) - I also include Sony's SLog3 reel and a LUT loaded into the monitor! </div><div style="text-align: justify;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjJuBJ0C6iI-Dnx1nEoOslJ_r5oMML43vaavh28NuxdKMYNBbH6SUbZzreJ8M9mO5QVwBcgC1MfztRW-n43e2jELrgaZeErjUG6Edbe8riYaJa0kC3Y1ym0ZwQ_7MV6LeJzoRAsCRFteL1FpmpockQq6LBSNNDMYI94NmpZFYc3nUtZt5AXLDk/s4032/!cid_F8E999AF-DB0E-4A61-8D6B-7709F3423F90.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="4032" data-original-width="3024" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjJuBJ0C6iI-Dnx1nEoOslJ_r5oMML43vaavh28NuxdKMYNBbH6SUbZzreJ8M9mO5QVwBcgC1MfztRW-n43e2jELrgaZeErjUG6Edbe8riYaJa0kC3Y1ym0ZwQ_7MV6LeJzoRAsCRFteL1FpmpockQq6LBSNNDMYI94NmpZFYc3nUtZt5AXLDk/w300-h400/!cid_F8E999AF-DB0E-4A61-8D6B-7709F3423F90.jpg" width="300" /></a></div><br /><div style="text-align: justify;"><br /></div><div class="separator" style="clear: both; text-align: left;"><br /></div><br /><div><br /></div></div><p></p>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-5646974.post-49635129253960833112021-12-31T15:13:00.007+00:002021-12-31T15:24:49.675+00:00SDi physical layer measurement for 3G and 12G; a video presentation.<div style="text-align: justify;">In the last couple of months I've had to do both training and fault-finding for SDi physical layer measurements. Below is a cut-down video of the half-day training; just so you can get feel for my training style.</div>
<div><br /></div><iframe allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen="" frameborder="0" height="315" src="https://www.youtube.com/embed/2xGmalL9anY" title="YouTube video player" width="560"></iframe><div><br /></div><div><a href="https://www.dropbox.com/sh/skh8h46h5c26oke/AAASVgPzd94OxG3wTUugGjXwa/3G_SDi_Notes.pdf" target="_blank">3G SDi notes</a></div><div><a href="https://www.dropbox.com/sh/skh8h46h5c26oke/AAAFZJP-Oz9MEghieiZ4ZOYna/EBU_TechReport002.pdf" target="_blank">EBU SDi physical layer measurement guidance</a></div><div><br /></div><div style="text-align: justify;">I've also been working for a sports broadcaster tracing a problem they have with their incoming OB lines (all via a telco's private cloud J2K SDi route) - the problem was more fundamental than you'd think, but I got to the bottom of it.</div><div style="text-align: justify;"><br /></div><div style="text-align: justify;">I'm very pleased to have a Leader LV5490 with the physical layer measurement option; I can just rock-up at a clients and within minutes be able to give them proper eye measurements with jitter (both 10Hz wander and 10/100KHz-filtered readings). </div><div style="text-align: justify;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEinDIrRlew7G-PpItLZlZMUiZVmzSh--_vn6kS4mgimLBw5MAp3XxWOgaszT1XCBx3xooPlg7qImsNGgeqfvipTEKiOIPcEwZ9oOVDA34LZwNEDYEY6fBqIyJSi80u_yznihRu0oeM7IHivE0C4MuHWhKkJJjKNzsCRYI0i6vCiCoG5bKTMIl4=s1920" imageanchor="1" style="clear: left; float: left; margin-bottom: 1em; margin-right: 1em;"><img border="0" data-original-height="1080" data-original-width="1920" height="360" src="https://blogger.googleusercontent.com/img/a/AVvXsEinDIrRlew7G-PpItLZlZMUiZVmzSh--_vn6kS4mgimLBw5MAp3XxWOgaszT1XCBx3xooPlg7qImsNGgeqfvipTEKiOIPcEwZ9oOVDA34LZwNEDYEY6fBqIyJSi80u_yznihRu0oeM7IHivE0C4MuHWhKkJJjKNzsCRYI0i6vCiCoG5bKTMIl4=w640-h360" width="640" /></a></div><br /><div><br /></div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-5646974.post-60038793528992855172021-12-30T19:33:00.004+00:002021-12-31T14:54:34.121+00:00ASUS ProArt PA32UCX monitor - LUTs etc.<p>My, my; it's been eighteen months since I paid any attention to this blog. Possibly the longest quiet period since I started writing it in 2003! Anyway - it's mostly down to work (I started <a href="https://engineers.media/key-services" target="_blank">Media Engineers</a> at the start of 2020; a few weeks before the pandemic started).</p><p><a href="https://blogger.googleusercontent.com/img/a/AVvXsEjrIPCxfDAfD4UQnLYOzAaHrMfSWx-nTnSQQ4-fAq5vQxW_KJZ6RzAkBdG1yHOlsyf1XxKmR-1YGk6JRRKKh56Js1aVYifwq2pWRl9U9UJC_0ZgTMgmFvCFage7Olx_UHUGAmQmfSY6FYhgDMLSSr1z5fJrATpCjEFTz5P0W6ZAn615wQApM_M=s1330" style="clear: left; display: inline; float: left; margin-bottom: 1em; margin-right: 1em; text-align: center;"><img border="0" data-original-height="684" data-original-width="1330" height="165" src="https://blogger.googleusercontent.com/img/a/AVvXsEjrIPCxfDAfD4UQnLYOzAaHrMfSWx-nTnSQQ4-fAq5vQxW_KJZ6RzAkBdG1yHOlsyf1XxKmR-1YGk6JRRKKh56Js1aVYifwq2pWRl9U9UJC_0ZgTMgmFvCFage7Olx_UHUGAmQmfSY6FYhgDMLSSr1z5fJrATpCjEFTz5P0W6ZAn615wQApM_M=s320" width="320" /></a></p><p style="text-align: left;"><span style="text-align: justify;">Back in 2019 I was approached by ASUS to point a probe at their new PA32U (the first of their 32" monitors to carry the </span><b style="text-align: justify;"><i>ProArt</i></b><span style="text-align: justify;"> product name). It had a lot of issues and I </span><a href="http://philtechnicalblog.blogspot.com/2019/01/is-there-hdr-mastering-display-that.html" style="text-align: justify;" target="_blank">wrote up my findings here</a><span style="text-align: justify;">. I also made a video showing my LightSpace profiling. </span></p><div style="text-align: justify;">In fairness ASUS issued a firmware update that took in my recommendations about DolbyVision and HLG. Also, in fairness they made their API available to the <a href="https://www.lightillusion.com/partners.html" target="_blank">guys at LightIllusion</a> which is just the thing - monitor manufacturers (almost) universally seem unable to make decent calibration software. </div><div style="text-align: justify;"><br /></div><div style="text-align: justify;">SO, spin forward to the autumn on 2021 and an old pal sent me his new <a href="https://www.asus.com/uk/Displays-Desktops/Monitors/ProArt/ProArt-Display-PA32UCX/" target="_blank">ProArt PA32UCX monitor</a> and asked me to set it up for two SDR profiles and two HDR profiles;</div><div style="text-align: justify;"><ol><li>Rec.709 with a gamma of 2.2</li><li>Rec.709 with a gamma of 2.4</li><li>HLG - Rec.2020 colourspace with HLG 1.2</li><li>DolbyVision - ST.2084 curve</li></ol></div><div style="text-align: justify;">At this point it's worth noting that I didn't have high hopes for the monitor for the following reasons;</div><div style="text-align: justify;"><ol><li>It's a single-layer IPS (LCD) display with an LED backlight,</li><li>It's a FALD (so zone'd backlight) - like the Apple XDR it's an effort to make an LCD have a higher dynamic range. A typical 10-bit LCD panel (like an Eizo CG319X) can achieve about 1,000:1 but with a zone'd backlight that can be in excess of 1,000,000:1 but with the downside of halation around edges and transitions. Compared to dual IPS (think Eizo CG3146 or Sony HX-310) or OLED (typ. Sony X300) it's poor-man's HDR.</li><li>They sell it on the strength of it having "quantum dots"(!) yet it can achieve about the same percentage of DCI-P3 colour space as a modern <i>non-quantum</i> LCD or OLED. If QD actually exists then surely it should approach laser-projector like primary colours and so get close to Rec.2020 colour primaries? Non-intuitively you need monochromatic primaries to be able to get the largest colour-triangle and that's the promise of Quantum Dots - but since this panel does not have monochromatic primaries where are the quantum effects?!</li></ol><div>So - my first thought was that rather than using the hunt & peck four-way controller I'd like to control the monitor from it's software. So, off to download <a href="https://www.asus.com/uk/Displays-Desktops/Monitors/ProArt/ProArt-Display-PA32UCX/HelpDesk_Download/?model2Name=ProArt-Display-PA32UCX" target="_blank">ProArt Calibration 2.0</a> - first on my Windows 10 calibration laptop and then my other work laptop (15" MacBook Pro 2015 model) and finally my ancient workshop Windows 7 machine - none of them could communicate with the monitor.</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEhxHNgXNeH5-eVSQxsQ-SwDmyWzF1ngyqeBNnv9EO80Z4F3Au5RqQRe0KRxY_rWfC_oQM_M_scEG318I_zJgkoAT8QQpp5yJmWjyAcQ4jhJ4i--zKPOM0QASVvwZbN8m28XBjHDKNHlq5tLe_J1D9SBQMqxrhgPiyRCP7E37ptIt_RSNuuGEKo=s1177" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="565" data-original-width="1177" height="193" src="https://blogger.googleusercontent.com/img/a/AVvXsEhxHNgXNeH5-eVSQxsQ-SwDmyWzF1ngyqeBNnv9EO80Z4F3Au5RqQRe0KRxY_rWfC_oQM_M_scEG318I_zJgkoAT8QQpp5yJmWjyAcQ4jhJ4i--zKPOM0QASVvwZbN8m28XBjHDKNHlq5tLe_J1D9SBQMqxrhgPiyRCP7E37ptIt_RSNuuGEKo=w400-h193" width="400" /></a></div><br /><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEiIUtw5cXyNeVZuKRU7bSo3Rbb-SRFYqFKwkAYETCShi16ktsgOn0bttUZ81QDBqMiHCBr3OxafVpLl_OM3ckuQ9aPkN_jtl7UJmRZ0tB7exDcnZI1BpPiVY78fz_LNE1g_JJ5F5Nue9R5PGJ5taN3EzV3n12uWE625mcbjqe-tIZc-cuJ449g=s506" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="251" data-original-width="506" height="199" src="https://blogger.googleusercontent.com/img/a/AVvXsEiIUtw5cXyNeVZuKRU7bSo3Rbb-SRFYqFKwkAYETCShi16ktsgOn0bttUZ81QDBqMiHCBr3OxafVpLl_OM3ckuQ9aPkN_jtl7UJmRZ0tB7exDcnZI1BpPiVY78fz_LNE1g_JJ5F5Nue9R5PGJ5taN3EzV3n12uWE625mcbjqe-tIZc-cuJ449g=w400-h199" width="400" /></a></div><br /><div>I tried several different USB-C cables and eventually I had to resort to a powered hub to get Windows to recognise the device. However, at no point could I get the ASUS software to talk to the display (across three machines, three OSes). Thankfully ColourSpace was able to address the monitor and drive the internal patch generator (more about that later!) - but, first job was to use my CR250 (spectroradiometer) to make a matching profile for my K10A photometer. The reason for this is that the spectro is ultimately accurate but very slow and not good near black whereas the tri-stim K10A is great near black, fast (typ. sub 1 sec per read) but is bedeviled by Specral Power Distribution issues (the K10A is an RGB probe). BUT, with a profile made with the CR250 on the display concerned you can impose spectro accuracy on the photometer.</div><div>So, here's the matching profile - <b>for <i>my K10A</i> on <i>this PA32UCX</i></b></div><div><b><i><br /></i></b></div></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEiJrwNtiem6G9QcqKYRVUgEnKVzQ9qhODabSjjUi5o-F3XIbTkxzkor_NTBG1p-giNA-4qGYkIUVU3GdL3ZwIKQzq6CAaVSaMu7ZnyphGGGPla0d_hP_k8TnLP0BAg0LyBw3LP2q5C0EGwUPXxIMRRo78eI-YRLZeoFxEPfEnnrgd39E_bUPPg=s1386" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="836" data-original-width="1386" height="241" src="https://blogger.googleusercontent.com/img/a/AVvXsEiJrwNtiem6G9QcqKYRVUgEnKVzQ9qhODabSjjUi5o-F3XIbTkxzkor_NTBG1p-giNA-4qGYkIUVU3GdL3ZwIKQzq6CAaVSaMu7ZnyphGGGPla0d_hP_k8TnLP0BAg0LyBw3LP2q5C0EGwUPXxIMRRo78eI-YRLZeoFxEPfEnnrgd39E_bUPPg=w400-h241" width="400" /></a></div><br /><div style="text-align: justify;">So, the next job is to profile the monitor so we can make the various calibration LUTs. For a 17-point 3D LUT you need to measure around 5,000 colours (17x17x17) and so even with the fast Klein probe you're looking at two hours. So - I set ColourSpace to drive the internal test signal generator on the monitor and went to make a coffee. When I looked in an hour later I realised something was very wrong; essentially the internal TSG does not seem to generate any blue?!</div><div style="text-align: justify;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEgizLc6Kt_LXsKc6O-7l11G3lGLmMQExUCNL1Jd1YcDR2rZ7ulLZ-30EPSmDxWZLoep0Dq54Lg5GzmKwvBL0K10LyY3EGkDMCp4UQXoib0Tl6WR2_Wxdy2jyUkhvpgWa1rcV7PzxzEJEk7RevzQsv5wnHNBoyFI1ZSI5c4dYBCkuYi5dJtqgWQ=s814" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="794" data-original-width="814" height="390" src="https://blogger.googleusercontent.com/img/a/AVvXsEgizLc6Kt_LXsKc6O-7l11G3lGLmMQExUCNL1Jd1YcDR2rZ7ulLZ-30EPSmDxWZLoep0Dq54Lg5GzmKwvBL0K10LyY3EGkDMCp4UQXoib0Tl6WR2_Wxdy2jyUkhvpgWa1rcV7PzxzEJEk7RevzQsv5wnHNBoyFI1ZSI5c4dYBCkuYi5dJtqgWQ=w400-h390" width="400" /></a></div><br /><div style="text-align: justify;">So, I had to break out my <a href="https://www.flandersscientific.com/boxio/" target="_blank">FSI BoxIO</a> which I normally use for patch generation and start again. Two hours later I had a profile and could use ColourSpace to generate LUTs that corrected the monitor to the two rec.709 USER slots. I saved out the various profiles as Builder Colour Space files (.bcs) and along with the LUTs I made you can grab there at <a href="https://tinyurl.com/yej2cs5j" target="_blank">https://tinyurl.com/yej2cs5j</a></div><div style="text-align: justify;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEjgYxiR2N9lcotYEUWGBPF8pZfQlOjqp-eusDXMQeajR0iE5sZvJWrwExW_yVC6WEFFH8TpEUM8rMitTdErMRR_5XQw4Ag3McXytazoYuDTFwcqaIJwlqAqOuS23mrWFMxy2Zd8iMdxGAFhQ13ynbeatu1Ki6s9hcSxFABGxwlX0kVgRsTRyeA=s998" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="382" data-original-width="998" height="153" src="https://blogger.googleusercontent.com/img/a/AVvXsEjgYxiR2N9lcotYEUWGBPF8pZfQlOjqp-eusDXMQeajR0iE5sZvJWrwExW_yVC6WEFFH8TpEUM8rMitTdErMRR_5XQw4Ag3McXytazoYuDTFwcqaIJwlqAqOuS23mrWFMxy2Zd8iMdxGAFhQ13ynbeatu1Ki6s9hcSxFABGxwlX0kVgRsTRyeA=w400-h153" width="400" /></a></div><br /><div style="text-align: justify;">Now to the HDR settings and I discovered that you have to toggle the HDR-flag in the HDMI stream to get the monitor to switch into HDR mode which is plainly stupid for something that isn't a TV! No matter; break out the <a href="https://www.aja.com/products/hi5-4k-plus" target="_blank">AJA Hi5-4K+</a> and use that to switch the monitor into both HDR modes.</div><div style="text-align: justify;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEhAywgqtpO-9cISkwaEDimMdyf2cr4i8iAG_XZYYT6e1WMMichzZK9MaktJnHpCLj6oC2l4DdKUaYtFfgLTjbLZicc2DGZz8RMDBGzlaBVrJe_kgOFRArCGFLkpddluc4qTOEMBPILzn1Hk_Cq8dwbTjUI-Mz-5N9o6Am7EhiOxrXvV-c4MEqs=s1024" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="693" data-original-width="1024" height="271" src="https://blogger.googleusercontent.com/img/a/AVvXsEhAywgqtpO-9cISkwaEDimMdyf2cr4i8iAG_XZYYT6e1WMMichzZK9MaktJnHpCLj6oC2l4DdKUaYtFfgLTjbLZicc2DGZz8RMDBGzlaBVrJe_kgOFRArCGFLkpddluc4qTOEMBPILzn1Hk_Cq8dwbTjUI-Mz-5N9o6Am7EhiOxrXvV-c4MEqs=w400-h271" width="400" /></a></div><br /><div style="text-align: justify;">Repeat the profile in ColourSpace and then generate the DolbyVision and HLG LUTs and use CS to upload them to the monitor. The results are not bad; here's a photo of the Eizo's luma scale in DolbyVision mode (so display-referred) and it shows around 650 Cd/m2 (not the >1,000 as their website suggests) once calibrated. In RAW/uncalibrated mode it can hit more than one thousand.</div><div style="text-align: justify;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/a/AVvXsEj-cGyTgh76svkGSb31ZSAC0Ub0De6z2yK835mTpQKEB0Mi93TKtpB88kk_DZI9YQ5WeZ04ifvYdiNz3JXgOyc6cgo1ysto1CMgW6DfbplAN7sHlbWD8EMvvrG2q2bv_dyR0c0M8fdYW-2wn4cZEA9W_AAiTWkKIeRDLI3oqrpZbsvwTTJtjkk=s1024" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1024" data-original-width="768" height="640" src="https://blogger.googleusercontent.com/img/a/AVvXsEj-cGyTgh76svkGSb31ZSAC0Ub0De6z2yK835mTpQKEB0Mi93TKtpB88kk_DZI9YQ5WeZ04ifvYdiNz3JXgOyc6cgo1ysto1CMgW6DfbplAN7sHlbWD8EMvvrG2q2bv_dyR0c0M8fdYW-2wn4cZEA9W_AAiTWkKIeRDLI3oqrpZbsvwTTJtjkk=w480-h640" width="480" /></a></div><br /><p></p><p><b><i>Last thoughts;</i></b></p><div style="text-align: justify;"><ol><li>If you put it into HDR mode, then switch the i/p to an SDR signal, disconnect/re-connect (which you have to do) it will then let you recall one of the SDR USER settings (so 1 for 2.4 gamma, 2 for 2.2 gamma) BUT it never takes the backlight back down to SDR levels - so you get rec709 with 500Cd/m2 white. You have to manually wind the "Brightness" figure back from 100 to 10</li><li>"Brightness" is mislabelled - it should be "Backlight" or somesuch</li><li>Brightness is actually called "Black Level"</li><li>Their software proved useless - without ColourSpace I would have been left high and dry. </li><li>All this fiddling about took days (whilst I was doing other things) - I would not want to have been faced with this at a client's site. I won't be taking bookings to calibrate these monitors.</li></ol></div><div style="text-align: justify;"><div>It's like a computer monitor they've hit hard with a hammer to kinda behave like a broadcast display but they haven't listened to everything the broadcast guy told them - I would not buy this monitor - for Rec.709 I'd use an Eizo CG-series and for HDR I'd use an LG or Panasonic OLED TV.</div><div><br /></div></div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-5646974.post-39118966798736346032020-08-05T20:59:00.005+01:002020-08-21T10:15:57.689+01:00JVC DLA-Z1 4k projector; terrible calibration software!<div style="text-align: justify;">I was recently asked to calibrate two JVC projectors for rec.709 and DCI-P3. These projectors have a modest amount of colour adjustment in their remote interface, but none of the factory presets are particularly accurate. For calibration JVC have <a href="https://www3.jvckenwood.com/english/download/dla-z1_rs4500_calibrationsoft.html" target="_blank">their own software</a> which is terrible! Why people don't integrate with LightSpace (particularly since Steve and his team are very keen to help manufacturers) I'll never know.</div><div style="text-align: justify;">Anyway, before detailing two days of frustration in a couple of grading rooms it's worth reminding ourselves about the difference between <a href="https://en.wikipedia.org/wiki/Spectroradiometer" target="_blank">Spectroradiometers</a> (AKA "spectro) and <a href="https://en.wikipedia.org/wiki/Tristimulus_colorimeter" target="_blank">Colourimeters</a> (AKA "tri-stim probes")</div><div><ul style="text-align: left;"><li><b>Spectroradiometers</b> measure wide band light energy - everything from 380nm (or lower) - very deep blue through to 740 (or higher) - very deep red. They are slow to make a reading (many seconds) and do not cope well with low light levels. </li><li><b>Colourimeters</b> measure just three wavelengths (just like your eyes) - which we'll typically refer to as Red, Green and Blue (but really are X, Y, Z colour matching functions) and so are vulnerable to metameristic failure (a mismatch between the primary colours generated by the display device and the filters used in the colourimeter) BUT they are fast (my <a href="https://www.kleininstruments.com/k10-a" target="_blank">Klein K10A</a> can make a read in less than a second) and they are accurate all the way down to near-black.</li></ul><div style="text-align: justify;">So, best practise is to use your spectro to make measurements of primary colours (and peak white to be sure) and use that to calibrate the tri-stim. After that you have the speed and black performance you need with the accuracy of the spectro imposed. I tend to do this every time I encounter a new display even though the K10A comes with a lot of factory profiles and the trick the Klein uses is that their filters are very close to average human vision and so any metameristic mismatch between the probe and the display is close to perception which is all important.</div></div><div style="text-align: justify;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjimEmouO9ge8tBwnH1y_Zs4ORBLcm8gs8ryuLmm8d2BBcNyADtWc2Qei7VVQZeAD9B2AaaGFCIJkeq4zOyq2PB2yBf0oDKnyzXDukHg0k8VIQcAN8BkliFjsTdRyETJ5Ue0Lk9dA/s609/Screenshot+2020-08-05+at+18.06.46.png" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="407" data-original-width="609" height="326" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjimEmouO9ge8tBwnH1y_Zs4ORBLcm8gs8ryuLmm8d2BBcNyADtWc2Qei7VVQZeAD9B2AaaGFCIJkeq4zOyq2PB2yBf0oDKnyzXDukHg0k8VIQcAN8BkliFjsTdRyETJ5Ue0Lk9dA/w487-h326/Screenshot+2020-08-05+at+18.06.46.png" width="487" /></a></div><div style="text-align: justify;"><br /></div><div style="text-align: justify;">Now, onto the JVC software, the first thing they neglect to tell you is to not run the network setting in DHCP mode if you want to do calibration; the projector tries to renew the DHCP lease every hour and so it's likely you'll loose connection and have to restart the process...</div><div style="text-align: justify;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhIAErHkKp34IK11CsLaJLjTwZda5x4ztKGhpLKljr-YlNMtjP8PGkInSO9I8jRq_E0w0GacXzVqves5Hrv-bL6IP9ZfzzlLC27zxMr91QLmwOw4Rs4tJqM-HoNgXMgVlqsWN5BYQ/s993/Capture1.JPG" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="740" data-original-width="993" height="382" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhIAErHkKp34IK11CsLaJLjTwZda5x4ztKGhpLKljr-YlNMtjP8PGkInSO9I8jRq_E0w0GacXzVqves5Hrv-bL6IP9ZfzzlLC27zxMr91QLmwOw4Rs4tJqM-HoNgXMgVlqsWN5BYQ/w512-h382/Capture1.JPG" width="512" /></a></div><div style="text-align: justify;"><br /></div><div style="text-align: justify;">Next you have only two choices of low-end probe - the "DTP special" - the Spyder, and the only slightly better Xrite i1Pro2 spectro (I happen to have one of those) but bear in mind all the things we said about spectro earlier.</div><div style="text-align: justify;">The Xrite needs to calibrate itself to it's supplied white reference tile every time you use it BUT the JVC software has not implemented that functionality - so, you have to load up some other software (I use Sony's monitor colour balance software), but LightSpace, ColourSpace or several others would do - connect to the probe, trigger a calibration and then disconnect.</div><div style="text-align: justify;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjkJxF0zFp2TcC_UP_wGHQwBEo28FdvBH2Pa544QG6qyy9aoBFj48Hll-H5d4Rkz9-8CAMZYwgvl0RJ5ckE_mxmZ8HF-yDF2SqdmgfPgfPUeUMDYKYu-bnq6Goqy3fpji01kArMqA/s938/Capture3.JPG" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="787" data-original-width="938" height="430" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjkJxF0zFp2TcC_UP_wGHQwBEo28FdvBH2Pa544QG6qyy9aoBFj48Hll-H5d4Rkz9-8CAMZYwgvl0RJ5ckE_mxmZ8HF-yDF2SqdmgfPgfPUeUMDYKYu-bnq6Goqy3fpji01kArMqA/w512-h430/Capture3.JPG" width="512" /></a></div><div style="text-align: justify;"><br /></div><div style="text-align: justify;">Now you have to position the probe to collect enough light to make measurements - most projector calibrating gets done from the operator's position and probes like the K10A have aiming lights to show you where they are pointing at the screen. BUT, after two days of experimentation I found I had to have to i1Pro2 as close to the screen as possible whilst avoiding it's own shadow. It's marginally improved by offsetting it horizontally (so the long edge of the probe is parallel to the screen) as the shadow is not as significant;</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div><br /></div><div style="text-align: justify;">These projectors have a setting for the LD power - you can drive the lasers at three different power levels. At the highest the image is too bright for grading work; around 120Cd/m2<super super=""> at peak white which would be fine for a 31" grading monitor, but not a projector. At the mid-LD setting you around 60Cd/m2 at peak white which although still bright is OK. Again, what the documentation doesn't tell you is that it take around half an hour for the power to ramp up or down between LD levels. </super></div><div><super super=""><br /></super></div><div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgdQzzaQgocqX8SpwozIV4dQUtFOAszuj3cH3aiEciDDg_dE_-TDCnBEsSQFmQSPBInvgp1DOTRarTEuRJiXhNdokarongQSZk2rn7ToHr2qN8aIj43XJbu7Ay7rCX-k3Y1uh-5tA/s1000/Capture5.JPG" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="750" data-original-width="1000" height="384" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgdQzzaQgocqX8SpwozIV4dQUtFOAszuj3cH3aiEciDDg_dE_-TDCnBEsSQFmQSPBInvgp1DOTRarTEuRJiXhNdokarongQSZk2rn7ToHr2qN8aIj43XJbu7Ay7rCX-k3Y1uh-5tA/w512-h384/Capture5.JPG" width="512" /></a></div><super super=""><br /></super></div><div>Finally, there is one other setting that can really kill you ability to get decent reads with the Xrite i1Pro2 probe and that's limited/full-range video on the input settings - yes! They have sited the internal patch generator before the video range decoder! So, with all this in mind if you don't;</div><div><ol style="text-align: left;"><li>Have the probe as close to the screen as possible,</li><li>Have the projector in High LD power mode for at least half an hour,</li><li>Have the video input set for full-range video,</li></ol></div><div>Then you will not be able to read a decent way up the 2.4 gamma curve for rec.709 (and the red channel is particularly affected). Have a look at the light levels as they are read;</div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEijjTCVZUNFCLSB0yXvtDeGSuDij1BDxDuGx1B1cKl_GDkDsg_C3oOoy1GHbPJKytkKQROUWjQekx4jGU-OeKWc9xjdb4rxPHFDE0lshPRg1R24JqOLS_MBXVjPnKlugvSi4aF5qg/s2048/IMG_3299.jpeg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2048" data-original-width="1883" height="512" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEijjTCVZUNFCLSB0yXvtDeGSuDij1BDxDuGx1B1cKl_GDkDsg_C3oOoy1GHbPJKytkKQROUWjQekx4jGU-OeKWc9xjdb4rxPHFDE0lshPRg1R24JqOLS_MBXVjPnKlugvSi4aF5qg/w470-h512/IMG_3299.jpeg" width="470" /></a></div><div><br /></div><div>This results in some terrible response in the resulting profile with the red channel in a terrible state, incorrect low end response and clipping close to black. </div><div><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiqQF8hVAM7yjBhZZyAWxr7VK8442baxE3hKzDCdRumX8Ie33o2Xps2cBCr_gKrMw89Vgjo6cKd7IooFQlG4FLQ_xIKzjd4L4YXmiM-5_RNqHZKtu-eEe3oQqNes0IAxEB424iJTg/s1000/Capture8.JPG" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="750" data-original-width="1000" height="384" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiqQF8hVAM7yjBhZZyAWxr7VK8442baxE3hKzDCdRumX8Ie33o2Xps2cBCr_gKrMw89Vgjo6cKd7IooFQlG4FLQ_xIKzjd4L4YXmiM-5_RNqHZKtu-eEe3oQqNes0IAxEB424iJTg/w512-h384/Capture8.JPG" width="512" /></a></div><div class="separator" style="clear: both; text-align: center;"><br /></div><div class="separator" style="clear: both; text-align: left;">However, if you get those three things right (above) then you get decent reads close to black and a proper response for the range;</div><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgG6FWqtg4A05-ijK37zyFVipwf1EAjX66z167aFi_caemIroikt7rvh3Llkejwmxi3e31yz6FiWU4oXAaq68lAli6hG_7hCyqOmcRelQFPHDnQqbJ2vzAGN5FLTvg1mwo9_f5Y6g/s2048/IMG_3301.jpeg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="2048" data-original-width="2015" height="512" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgG6FWqtg4A05-ijK37zyFVipwf1EAjX66z167aFi_caemIroikt7rvh3Llkejwmxi3e31yz6FiWU4oXAaq68lAli6hG_7hCyqOmcRelQFPHDnQqbJ2vzAGN5FLTvg1mwo9_f5Y6g/w504-h512/IMG_3301.jpeg" width="504" /></a></div><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: center;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgiWJiSYNJcyiCi7QwWGZCQmisjoy97pYl3mQ6TYOeadxKihBE2wXoqv3ObzBTRcrMZNUWQxUaK4C_SE-TQm4aCsc5O6PA4O12bQBzOGP98-F11tR-H2Z62uUUzVWD9AAJ-JHFTnQ/s1000/Capture4.JPG" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="750" data-original-width="1000" height="384" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgiWJiSYNJcyiCi7QwWGZCQmisjoy97pYl3mQ6TYOeadxKihBE2wXoqv3ObzBTRcrMZNUWQxUaK4C_SE-TQm4aCsc5O6PA4O12bQBzOGP98-F11tR-H2Z62uUUzVWD9AAJ-JHFTnQ/w512-h384/Capture4.JPG" width="512" /></a></div><div class="separator" style="clear: both; text-align: left;"><br /></div><div class="separator" style="clear: both; text-align: justify;">How much easier this would have all been if you could use a tri-stim probe like the Klein but by limiting the software to using a Spectro you are bedevilled by low-light issues. Having to do your calibration at High LD and then switch the projector back to mid-LD when your done is silly. </div><div class="separator" style="clear: both; text-align: justify;">I suppose the reason it's like this is that these projectors are aimed at high-end domestic/board-room/lecture-theatre applications and not film & TV. The fact the software defaults all SDR gammas to 2.2 seems to indicate this and not having LightSpace support (when LightIllusion have offered to do all the API donkey-work) is unforgivable in the professional display device.</div><div style="text-align: justify;"><br /></div>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-5646974.post-31101729589650716342020-05-10T17:57:00.001+01:002020-05-10T17:57:29.532+01:00Kickstarter projects; three out of four ain't bad...<div style="text-align: justify;">
Along with <a href="https://www.kickstarter.com/" target="_blank">KickStarter</a> there are numerous crowd-funding sites and I've ploughed a bit of money into several. As well as electronics projects I have funded a few artists to record albums and have been very pleased. </div>
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Here are four projects I backed, three of which came out really well and one which kinda got half-way there. The thing you have to remember is that backing things on KickStarter is not like buying something - you have to fully accept that some project just won't deliver.</div>
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<li><a href="https://pockethernet.com/" target="_blank">PockEthernet</a> is a tester for ethernet and IP networks. Serious network people use a <a href="https://www.flukenetworks.com/datacom-cabling/Versiv/dsx-cableanalyzer-series" target="_blank">Fluke DTX-1800</a> (I used to have access to one) - it's now discontinued, but like the replacement DSX-series all TDRs (Time Domain Reflectometers) are expensive (a few thousand pounds) but if you want to certify an install it is expected. At the other end of the spectrum you have the £50 DC testers that just make sure there is continuity on each of the eight legs and really just allow you to have some certainty in termination polarity etc. The PockEthernet is a half-way house with some TDR capability (not sure home accurate is it) but nice record keeping. Above a little DC-tester (like a ModTap or others) it can do some IP testing; POE, DHCP, VLAN tags etc. and so for me is ideal. </li>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg7UMQ5B0S9PSbz5Aoisfep9_X0cK4npsbXwOD2zW1uxTy-XR_cF37MG3fW-cTofVhN_DjAv2VWrjo1Keu4TVTMKwWLsDtJYxR60g3lBXb6_WoEN45XxRsAaeGQ-iybZdkT1dZ2Ag/s1600/IMG_0964.PNG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="300" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg7UMQ5B0S9PSbz5Aoisfep9_X0cK4npsbXwOD2zW1uxTy-XR_cF37MG3fW-cTofVhN_DjAv2VWrjo1Keu4TVTMKwWLsDtJYxR60g3lBXb6_WoEN45XxRsAaeGQ-iybZdkT1dZ2Ag/s400/IMG_0964.PNG" width="400" /></a></div>
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<i>You interact with it using a BlueTooth-attached app running on 'phone or tablet computer</i></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhvypQD3Pt_tc00u3gfJ2PoUXovzDf_-RAmcNSOu96-RcDdjco1vxnxr8_C-XfplTIYqm3znqvJEsI-i5FPC99nWXPCXs8B1uDLoavJpUTxmpCEMyzsNsQw98Cs_FzCzStP-P32EQ/s1600/Screenshot+2020-05-10+at+17.23.31.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="665" data-original-width="901" height="295" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhvypQD3Pt_tc00u3gfJ2PoUXovzDf_-RAmcNSOu96-RcDdjco1vxnxr8_C-XfplTIYqm3znqvJEsI-i5FPC99nWXPCXs8B1uDLoavJpUTxmpCEMyzsNsQw98Cs_FzCzStP-P32EQ/s400/Screenshot+2020-05-10+at+17.23.31.png" width="400" /></a></div>
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<i>The measurement reports can be over many circuits (so testing a whole patch-panel at once is do'able) and you can email/save as PDF from the app.</i></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgaVz5IUXxVqCdwzAoLqPUepYB4OmbWYz6HdlCPJhhLfo06GDy09h_-ZAx3YCb9P4lSvyj79Nepr-6PkgwaINcHB34n6hn8BjQCKUgGKfbpEIHvfH-jtWkyl8VYX3TQ3NU5B3PlVA/s1600/Screenshot+2020-05-10+at+17.23.44.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="556" data-original-width="885" height="251" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgaVz5IUXxVqCdwzAoLqPUepYB4OmbWYz6HdlCPJhhLfo06GDy09h_-ZAx3YCb9P4lSvyj79Nepr-6PkgwaINcHB34n6hn8BjQCKUgGKfbpEIHvfH-jtWkyl8VYX3TQ3NU5B3PlVA/s400/Screenshot+2020-05-10+at+17.23.44.png" width="400" /></a></div>
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<i>You can even brand the reports with your logo</i></div>
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<ul>
<li><a href="https://beeline.co/pages/beeline-velo" target="_blank">BeeLine bike navigator</a> - I often see folks with their smart 'phone in a waterproof wallet as a bike GPS. That's great, but when I'm cycling somewhere I'm not entirely familiar with I often like to find my way but certain in the knowledge that as I get closer I can make better navigation decisions. The BeeLine is a bluetooth attached smart compass that tells you what direction to go and how far your destination is. I've been using mine for maybe eighteen months and it works really well. It is stable and accurate with good battery life.</li>
</ul>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg3TskSIegSlUXyQuJ4RbJD-Q6lOkRbNoqa26vjzmEVBaChxYzmxvBARzyPjHqGrEZ1q9DQ3C_rNsB313Qd-qO10cl4fjdnj7yEgmQ4NAUQuth_PyXxxcCvj1DiBhl09RwzviqgHA/s1600/IMG_2962.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1334" data-original-width="750" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg3TskSIegSlUXyQuJ4RbJD-Q6lOkRbNoqa26vjzmEVBaChxYzmxvBARzyPjHqGrEZ1q9DQ3C_rNsB313Qd-qO10cl4fjdnj7yEgmQ4NAUQuth_PyXxxcCvj1DiBhl09RwzviqgHA/s400/IMG_2962.png" width="223" /></a></div>
<div style="text-align: center;">
<i>wiggly route; it was a Sunday afternoon!</i></div>
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<br />
<ul>
<li><a href="https://www.kickstarter.com/projects/getpebble/pebble-time-awesome-smartwatch-no-compromises" target="_blank">Pebble Smart Watch</a> - Although the Apple Watch is undoubtedly a miracle to technology I never felt it was for me; the biggest problem is the battery life; two days at best. It also seems to need a lot of curation. Friends who use them are constantly attending to them and I only really wanted a second screen for my 'phone with good notifications, health tracking and control of media players. The Pebble does just those things really well and nothing else. The battery on mine (Pebble Time Steel variant) lasts for more than a week and when they went bust at the end of 2016 I bought a second one just in case. They charge in about an hour.</li>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhDFTzuc8F9xMA6cWjIou97N4bJkBCuC6-JnlpEJqu8lwTlJT4YObiaH2Cedo3bx_2K9qCkCxeS4fYGyw9t6C-3-n3nBRCYumorgbPXegOcjSNlEk7AgK7i4xkyUP6W7j4mTKBsUQ/s1600/IMG_2989.PNG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1334" data-original-width="750" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhDFTzuc8F9xMA6cWjIou97N4bJkBCuC6-JnlpEJqu8lwTlJT4YObiaH2Cedo3bx_2K9qCkCxeS4fYGyw9t6C-3-n3nBRCYumorgbPXegOcjSNlEk7AgK7i4xkyUP6W7j4mTKBsUQ/s400/IMG_2989.PNG" width="223" /></a></div>
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<i>The lockdown has been great for sleep but very bad for exercise...</i></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiCgN0_3Wsz0PFhBPCFnP-r0TEQ7F4A1gVTa3LpHLqqz6E_0b1_aHZ9dghKiwr-kw734v3T9NsvrE-8Z8Y4M7H6pOVOV31-1QO3tJdsYCl-yQACkz6NoUJj5b8Hn-mnBDy88rmKqQ/s1600/IMG_2990.PNG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1334" data-original-width="750" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiCgN0_3Wsz0PFhBPCFnP-r0TEQ7F4A1gVTa3LpHLqqz6E_0b1_aHZ9dghKiwr-kw734v3T9NsvrE-8Z8Y4M7H6pOVOV31-1QO3tJdsYCl-yQACkz6NoUJj5b8Hn-mnBDy88rmKqQ/s320/IMG_2990.PNG" width="179" /></a></div>
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<div style="text-align: center;">
<i>I always return to the same watch-face "Graphite Too" as it has everything I use and is clear.</i></div>
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<div>
Thankfully after Pebble went bust and got bought by FitBit a group call <a href="https://rebble.io/" target="_blank">Rebble</a> acquired all the source-code etc and have been supporting the watches with new firmware and online services since.</div>
<div>
<ul>
<li><a href="https://www.kickstarter.com/projects/920064946/oscilloscope-watch/" target="_blank">Oscilloscope Watch</a> - I know what you're thinking; what a daft idea! I've written a lot about this one <a href="http://philtechnicalblog.blogspot.com/search/label/OscilloscopeWatch" target="_blank">in the past</a> because I did get a very janky alpha-version (3D printed case, very early build of the software etc). Still, five years on and the project is still live on Kickstarter and so we live in hope!</li>
</ul>
<iframe width="560" height="315" src="https://www.youtube.com/embed/2CXwodnJhjo" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
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Unknownnoreply@blogger.com1tag:blogger.com,1999:blog-5646974.post-86081072068903882072020-03-12T17:25:00.001+00:002020-03-12T17:27:10.660+00:00Modifying Blackmagic 6G routers for quiet(er) operation!<div style="text-align: justify;">
You can't deny the value in <a href="https://www.blackmagicdesign.com/uk/products/smartvideohub" target="_blank">BMD SmartVideo Hubs</a> - they are a fraction of the price of traditional broadcast video matrices. They have appalling return-loss on the BNC inputs and their control system is very simple (although in lots of cases that's a benefit). The temptation is to stick them in desks in edit, grading and audio suites, but they are noisy! The reasons are;</div>
<br />
<ol>
<li>Cheap, low air volume fans</li>
<li>Tiny holes in the chassis through which to try and pull enough air</li>
<li>No control of the fans even though the ones they supply have a tach output</li>
</ol>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJ6ynN-TBsTNaZ7poG9VonOcK4qVIhwLgCV19Dcmp6cnq_JLU5lPh2alJWxVLHtjd_oag4W47Kv6GTmNQXiGa1nCMjTAAlaWnv57CmPIJ5NBWDL1xnDhwho5O2ohtvepp1anoT1g/s1600/BMD_Bench.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="682" data-original-width="488" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgJ6ynN-TBsTNaZ7poG9VonOcK4qVIhwLgCV19Dcmp6cnq_JLU5lPh2alJWxVLHtjd_oag4W47Kv6GTmNQXiGa1nCMjTAAlaWnv57CmPIJ5NBWDL1xnDhwho5O2ohtvepp1anoT1g/s400/BMD_Bench.JPG" width="285" /></a></div>
<div style="text-align: center;">
<i>'scope is showing the tach o/p of one of the fans, yes, I was routing video!</i></div>
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<div style="text-align: justify;">
Even though the cheap/noisy fans BMD fit have a tach output it clearly isn't read by the hardware as the fans run at full tilt from power-on. This one had been on and routing video for a couple of hours (with the lid on) and it's like sitting next to a vacuum cleaner.</div>
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So, quick look at RS and filtering by size, volts and then listing by highest air volume & lowest noise I got <a href="https://uk.rs-online.com/web/p/axial-fans/2007750/" target="_blank">these Papst fans</a> - they also have a tach output (I had no plan to use that) and more importantly are induction-start motors (so they will run on much lower voltages; I had a feeling I could simply control them with a potentiometer with a similar impedance to the coils).</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEikg6c0yKtbVTrAbl7FcSt4kh3SVXA4U2YGQXN-XILr2MyPrwFGj0tl6mFXRMY8GcR2fR4E99Q049XVIsUtB-ZhjRyhIa7-JAgrDmPCrRs6PflcoiB1AFY7_Lyosl_3Y04XPDUzWA/s1600/with-pots.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="654" data-original-width="780" height="268" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEikg6c0yKtbVTrAbl7FcSt4kh3SVXA4U2YGQXN-XILr2MyPrwFGj0tl6mFXRMY8GcR2fR4E99Q049XVIsUtB-ZhjRyhIa7-JAgrDmPCrRs6PflcoiB1AFY7_Lyosl_3Y04XPDUzWA/s320/with-pots.JPG" width="320" /></a></div>
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<i>getting them ready to fit in the same JST 1.5mm pitch headers as the stock fans, 10K pots</i></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiRVDXbpP8n3G6Lqz872b9b7lndDfDmWED_dDlVCAsK1wqPa6vYi2S4q3p7L2aBq3i7pP2AO3swiXdkinnBT9Y0XS7_5RQ5NUjoR2bsRhykiDu3GAtt3xdgGbtUJFBMs054H6Tkkw/s1600/fans-fitted.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="528" data-original-width="769" height="219" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiRVDXbpP8n3G6Lqz872b9b7lndDfDmWED_dDlVCAsK1wqPa6vYi2S4q3p7L2aBq3i7pP2AO3swiXdkinnBT9Y0XS7_5RQ5NUjoR2bsRhykiDu3GAtt3xdgGbtUJFBMs054H6Tkkw/s320/fans-fitted.JPG" width="320" /></a></div>
<div style="text-align: center;">
<i>fitted to replace the stock fans - I had to ream-out the screw holes in the fans for the screws to fit, double-sided tape for the pots.</i></div>
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The other issue is the tiny holes they have in those cases for airflow. With a bit of extruded aluminium and grill material you can get a good look.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh9G7Zio5DKdZpeEuO4UElaRrpYY2hU3Gkc2RYbGXaTB5ksKPIJXiBYnVV6b4UHZWauqpVUWIBZzGZlHSlEJA-5bfVGTyC3jxRFSEDQdU7nzYKNhMdk_u1TGqtS8YwXjsIBQjfQqA/s1600/lid.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="533" data-original-width="808" height="211" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEh9G7Zio5DKdZpeEuO4UElaRrpYY2hU3Gkc2RYbGXaTB5ksKPIJXiBYnVV6b4UHZWauqpVUWIBZzGZlHSlEJA-5bfVGTyC3jxRFSEDQdU7nzYKNhMdk_u1TGqtS8YwXjsIBQjfQqA/s320/lid.JPG" width="320" /></a></div>
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<i>Make sure you don't put another piece of equipment directly above it!</i></div>
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So, proof of the pudding and all that; I ran the stock unit for a couple of hours, pulled the lid off and took a photo with my thermal camera and then did exactly the same after the modifications. The results speak for themselves; the client has these in their audio suite and game me four more to modify.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiQsewR7ZiRNBDt-Tc7bdfj7GTdRxqNMI1dHDet9GnMa5_Iv3bPBAhu9ZejLlH9FaETnoegLkBXJk9a8rUfzknX24kIeuBaH9iNwHjnVssfKtHOy3IC8hfHV0s68qNC-986tpkMKw/s1600/thermal_comparison.JPG" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="669" data-original-width="1066" height="250" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiQsewR7ZiRNBDt-Tc7bdfj7GTdRxqNMI1dHDet9GnMa5_Iv3bPBAhu9ZejLlH9FaETnoegLkBXJk9a8rUfzknX24kIeuBaH9iNwHjnVssfKtHOy3IC8hfHV0s68qNC-986tpkMKw/s400/thermal_comparison.JPG" width="400" /></a></div>
<div style="text-align: center;">
<i>before & after - running cooler and maybe 20dBs quieter</i><br />
<i><br /></i>
<div style="text-align: left;">
As an aside I found driving these fans at a constant 8v produced the best results.</div>
</div>
Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-5646974.post-17611613601620273872019-11-29T13:13:00.000+00:002019-11-29T13:13:07.617+00:00Rigol Ultrascope software and Windows<div style="text-align: justify;">
Ever since abandoning the faithful Tektronix 2245 oscilloscope I've been a fan of Rigol digital 'scopes; compact and a load of functionality for modest money (FFT and 1Gig samples/sec in my little DS1052E).</div>
<div style="text-align: justify;">
Rigol have been less than stellar in keeping the Windows software current and so here are some cobbled-together instruction (from <a href="http://www.milkcarton.com/">http://www.milkcarton.com</a> amongst others - but his website is often down?).</div>
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<br /></div>
<div style="text-align: justify;">
</div>
<ol>
<li><a href="https://www.rigolna.com/download/" target="_blank">Download Ultrascope</a> for your particular series (so <a href="http://beyondmeasure.rigoltech.com/acton/attachment/1579/f-0054/0/-/-/-/-/file.zip" target="_blank">DS1000E</a> in my case)</li>
<li><a href="http://www.engineersbench.com/phil/tech/Rigol/niusbtmcVista.zip" target="_blank">Download the Windows driver </a>(had to find this on the Way Back Machine!), Extract these two files, then go find the device in the Device Manager. Update the driver and point it to the directory where you extract the driver files.</li>
<li>Next, download the <a href="http://www.engineersbench.com/phil/tech/Rigol/visa503runtime.exe" target="_blank">NI-VISA Run-Time Engine</a> (v5.0.3 as of this writing). Beware, this file weighs in at 71 MB. Install the VISA runtime with the default options (you could probably get away with just installing the USB portion, but I didn’t try it).</li>
<li>When the NI-VISA installer finally finishes, you might be prompted to reboot. I skipped this step :-). Run the Ultrascope software, and click on Tools –> Connect to Oscilloscope. I was prompted with a list of devices, with none of it making much sense, except the first option “USB0…”</li>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhWdYclkE7ReBZg0RMc-biN2wJ9q5MxYKlHgMNThUcglODeB9TvTXwlk7c79YuX89GehcY_2O5hWN2Oe5pswhdFjUlqDpKh2xQwNsis5ribqDH-5xyK6gZpOYFM5zhDlMKA4gCHqg/s1600/D7Hf3A0XkAEsCeA.jpeg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1077" data-original-width="1600" height="268" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhWdYclkE7ReBZg0RMc-biN2wJ9q5MxYKlHgMNThUcglODeB9TvTXwlk7c79YuX89GehcY_2O5hWN2Oe5pswhdFjUlqDpKh2xQwNsis5ribqDH-5xyK6gZpOYFM5zhDlMKA4gCHqg/s400/D7Hf3A0XkAEsCeA.jpeg" width="400" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEim07BbvD4usKZc8H5eJBnG51po4y6VaqC8Ax9kBv0PEyfqT3IEKs8MgPDBX71ZAcfjS9B7ZaUHLmmHYWmlTVabdE_n-Fg83BSaJnCiECvQluVpQ3OcdoaQd6slXqI0W3h-w4xTIQ/s1600/D7Hf3AyXYAENz--.jpeg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1127" data-original-width="1600" height="281" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEim07BbvD4usKZc8H5eJBnG51po4y6VaqC8Ax9kBv0PEyfqT3IEKs8MgPDBX71ZAcfjS9B7ZaUHLmmHYWmlTVabdE_n-Fg83BSaJnCiECvQluVpQ3OcdoaQd6slXqI0W3h-w4xTIQ/s400/D7Hf3AyXYAENz--.jpeg" width="400" /></a></div>
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Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-5646974.post-8083812476267958302019-10-06T21:03:00.000+01:002019-10-06T21:03:03.612+01:00Experiments with white light (it's complicated!)<div style="text-align: justify;">
I've often run a day's training course for broadcast engineers who want to get up to speed with calibrating monitors and projectors; typically to rec.709 but increasingly to P3 as HDR and 4K/UHD are becoming a thing. One of the principles I've always struggled to get over is Metamerism; that inability to see/measure colours correctly if your measurement device (camera, eye) is tristimulus and your source of illumination does not have a daylight-like spectrum (so LED lights, typically).</div>
<div style="text-align: justify;">
<br /></div>
<div style="text-align: justify;">
A few month's ago I got one of <a href="http://chriswesley.org/spectrometer.htm" target="_blank">Chris Wesley</a>'s excellent home-brew spectroradiometer kits; from now on referred to as the <i>ghetto-spectro</i>. Read Chris's excellent documentation about how you can make really quite accurate spectrum measurements with modest parts so long as you can accurately calibrate the thing - and this is where the spectrum of Mercury comes in useful. Mercury has two peaks in the visible spectrum at 546nm and 436nm and you can guarantee that a compact fluorescent bulb will have a decent amount of mercy in it.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEheGvm2pzclkkrXw_FcZaOKzgRQy9I_mqGoHlyZL6Di-xRrr9rIqN45MUpJK0fZq3C_u4KeJqDsO-FGPCP2u2PDgqySZJo28Lswx5Uy8q-946tIcvsXNFDm5WVHUbz4TVtWunQJYQ/s1600/iPhos.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1161" data-original-width="1600" height="290" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEheGvm2pzclkkrXw_FcZaOKzgRQy9I_mqGoHlyZL6Di-xRrr9rIqN45MUpJK0fZq3C_u4KeJqDsO-FGPCP2u2PDgqySZJo28Lswx5Uy8q-946tIcvsXNFDm5WVHUbz4TVtWunQJYQ/s400/iPhos.jpg" width="400" /></a></div>
<div style="text-align: center;">
<i>the ghetto-spectro pointed at the mercury containing CFL bulb on my workshop bench</i></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiX-ImdB7sVUr2Sge9VK_eJxBDP70xHeqsi8z3QcKoMcP97a73xKrBlRoiHL5ZDM8R549yJcOfWvfYpGzWMJC4o4TdrC732KJbPFgn7dJas4mHqOw27NxMecx93Dr01AvQpbFrwAg/s1600/CFL-spectrum.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="228" data-original-width="979" height="92" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiX-ImdB7sVUr2Sge9VK_eJxBDP70xHeqsi8z3QcKoMcP97a73xKrBlRoiHL5ZDM8R549yJcOfWvfYpGzWMJC4o4TdrC732KJbPFgn7dJas4mHqOw27NxMecx93Dr01AvQpbFrwAg/s400/CFL-spectrum.jpg" width="400" /></a></div>
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<i>the measured output showing the various peaks of different elements</i></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjPl9XrpgW9Hb0WvUH2tsXPUdoOJadRFP3EUdCXigubfyolZLbOOi2voWdHdEvsL4bbtbCc2t_UQQLvtV9a39tdQZOpCYGFMffj8kbiXyHhSNkIht2EZn_f8T-4n4MQwjfACIO8BA/s1600/CFL-image.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="170" data-original-width="629" height="107" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjPl9XrpgW9Hb0WvUH2tsXPUdoOJadRFP3EUdCXigubfyolZLbOOi2voWdHdEvsL4bbtbCc2t_UQQLvtV9a39tdQZOpCYGFMffj8kbiXyHhSNkIht2EZn_f8T-4n4MQwjfACIO8BA/s400/CFL-image.jpg" width="400" /></a></div>
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<i>the image from the diffraction grating in the iPhos</i></div>
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So, <a href="https://youtu.be/2mrTpAO3ulk" target="_blank">watch Chris's video</a> which tells you how to calibrate to the two Hg-peaks, and pay special attention between 540 and 550nm as Terbium lurks very closely to the 546nm peak (green) of Mercury.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjsLKZjxzaTmwev2abgmLRwqg6LS_kbGTijZkMjwgTF4PzlIQDUTOTgTLaKZF1DnhMaavNMku9GkzVEgesZf75uYQ3RauZoC1pb19q34DSxKhsNb3rUmskNnfMxlteREEqdckaEng/s1600/500nm-range.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="228" data-original-width="979" height="92" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjsLKZjxzaTmwev2abgmLRwqg6LS_kbGTijZkMjwgTF4PzlIQDUTOTgTLaKZF1DnhMaavNMku9GkzVEgesZf75uYQ3RauZoC1pb19q34DSxKhsNb3rUmskNnfMxlteREEqdckaEng/s400/500nm-range.jpg" width="400" /></a></div>
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<i>Terbium is at 543nm, very close to Mercury at 546nm</i></div>
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OK, now I have a calibrated spectro I can turn my attention to experiments with white light and perception. I build a box with two isolated sections, painted inside with a very reflective white primer paint. In the left-hand cavity is one of those RGB-mixer bulbs based on LED technology (and controllable from an app; very 2019!) and in the right-hand section is a broad-spectrum white light. </div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgzsmcb_y9tu-0yb9KfZji_DRBvVoifzRGvP8nu_pQGBHtzJbCitH8_M5fdvpig-Lhkq_MPs-o2rhzLCLsI2R4s5CYX9jcA4-46r4W8VZDx9VBc4lfLvIEsBxXkT7v-Qdt41shQSA/s1600/EFsZ5TxWkAAMOWt.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1504" data-original-width="1600" height="299" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgzsmcb_y9tu-0yb9KfZji_DRBvVoifzRGvP8nu_pQGBHtzJbCitH8_M5fdvpig-Lhkq_MPs-o2rhzLCLsI2R4s5CYX9jcA4-46r4W8VZDx9VBc4lfLvIEsBxXkT7v-Qdt41shQSA/s320/EFsZ5TxWkAAMOWt.jpg" width="320" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiALNqO-vKsG3toSomsAn4MlglkRZcKTSQ5Htznywl2ufLpVMT_HgnPT8ez_mtfQZlJIAEW7I6sNUMHf78DfUm41JebsbUEp4O_jT7PQT2Am9lVymRmWyrJ_fvvryiln2xVtZg_PQ/s1600/EFsZ5TwXYAEOPQZ.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="793" data-original-width="750" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiALNqO-vKsG3toSomsAn4MlglkRZcKTSQ5Htznywl2ufLpVMT_HgnPT8ez_mtfQZlJIAEW7I6sNUMHf78DfUm41JebsbUEp4O_jT7PQT2Am9lVymRmWyrJ_fvvryiln2xVtZg_PQ/s320/EFsZ5TwXYAEOPQZ.jpg" width="300" /></a></div>
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Thus equipped I can now mix the RGB values in the left-hand side to produce a white light that matches the right-hand side from my perception. As you can see; the camera in my iPhone does not agree! BUT, I promise you, to my eyes the two white are a really good match. I have spent may years "racking" studio cameras (matching their colourimetry for live TV shows so that the lighting director doesn't shout at you!) and eye-matching displays (typically a good domestic TV to a grade-1 broadcast monitor) - I have a better eye for colour than most.</div>
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So, at this point I should show the spectro output for the two light sources;</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgLos1CJUq0IGqIB1pvDVPfNoU0GYifeSYkcABGPdP3MlscalIh0BFV39ZrOwd5D-JjdEogDhgYQ1w-vJbhP1ttnMOOUhtjW8r9PZgZ-7QIcdUVNyeGZFaooo0x_NiRvuKlEyKZpA/s1600/0_07.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="170" data-original-width="629" height="107" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgLos1CJUq0IGqIB1pvDVPfNoU0GYifeSYkcABGPdP3MlscalIh0BFV39ZrOwd5D-JjdEogDhgYQ1w-vJbhP1ttnMOOUhtjW8r9PZgZ-7QIcdUVNyeGZFaooo0x_NiRvuKlEyKZpA/s400/0_07.jpg" width="400" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgOCb77IRJ87Se4tITVI8_HAZ7pZTeDDzSay6rSO7FEmXfeXVEY_-dWRd4w2VCwRBBesdmgaeQX5AuJ8Cq93FftSJUXdzLUI_XnafJDZFuBmw6QvorO4PGH0eAuHaDmeghqw-7l5Q/s1600/0_08.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="228" data-original-width="979" height="92" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgOCb77IRJ87Se4tITVI8_HAZ7pZTeDDzSay6rSO7FEmXfeXVEY_-dWRd4w2VCwRBBesdmgaeQX5AuJ8Cq93FftSJUXdzLUI_XnafJDZFuBmw6QvorO4PGH0eAuHaDmeghqw-7l5Q/s400/0_08.jpg" width="400" /></a></div>
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<i>the right-hand broadband white light; reasonably continuous spectrum</i></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEivBoqEzdRVe84SGsaI15iTOMRSXm4J4GKkAdsmKlFmbv8LfRwaDGkvLgRMg-jAgIWg4oI94AK51HTFK5dpKoAsuZOrjAcrovDWbjU2VOGEHZQC7uphB39ME3Cvp2t9sXZhcVx0mw/s1600/0_05.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="170" data-original-width="629" height="107" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEivBoqEzdRVe84SGsaI15iTOMRSXm4J4GKkAdsmKlFmbv8LfRwaDGkvLgRMg-jAgIWg4oI94AK51HTFK5dpKoAsuZOrjAcrovDWbjU2VOGEHZQC7uphB39ME3Cvp2t9sXZhcVx0mw/s400/0_05.jpg" width="400" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEginQmGRKQAAfOWimjGqUNOhW3_e6ahJyxKZgyhnwV74qDDXFeJ9IFmFSP3GE3jVSMCy-5OgdP3gs1VhE0_NUoBSepnD4eQyXD-fN7OVo5u8mAoUIQYCw2ziuLQaKtpOKrCnNG_Og/s1600/0_06.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="228" data-original-width="979" height="92" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEginQmGRKQAAfOWimjGqUNOhW3_e6ahJyxKZgyhnwV74qDDXFeJ9IFmFSP3GE3jVSMCy-5OgdP3gs1VhE0_NUoBSepnD4eQyXD-fN7OVo5u8mAoUIQYCw2ziuLQaKtpOKrCnNG_Og/s400/0_06.jpg" width="400" /></a></div>
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<i>the RGB-mixer bulb; three clear peaks</i></div>
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So; I took photos using three different cameras; an iPhone 8 using the native Apple photo app, a low-end Android tablet using the Google photo app and a 2015-vintage Fuji Finepix 5600 bridge camera. All three rendered the RGB-white differently (remember , that to my eyes it's the same white as the broadband white bulb) and they also minimized the differences in the colours of the juggling thuds I used as colour references in the two box sections.</div>
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<i><b>From the iPhone 8</b></i></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgs1pLyf_X5vVM6UxPpc8jbOnRv9OLIHfn3cVTvgx_BXF9agGB_U2PLFe81keKRPVm1LjWZXtmBN0KaFdy0nfELjvTMdpe2-SC-rJYsSI_bjpuivGZMoppE5ySC2jL65LC-Npnelg/s1600/IMG_2210.jpeg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="736" data-original-width="1600" height="147" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgs1pLyf_X5vVM6UxPpc8jbOnRv9OLIHfn3cVTvgx_BXF9agGB_U2PLFe81keKRPVm1LjWZXtmBN0KaFdy0nfELjvTMdpe2-SC-rJYsSI_bjpuivGZMoppE5ySC2jL65LC-Npnelg/s320/IMG_2210.jpeg" width="320" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgOvUycQc8Ho4NgDeLqGWGSQuQxT689qRJkBSsRX6rAL6IgTKLPDUJ3r1_H0_dFcfBOeUr2z5_UwWslW1SdVyHBCURVcRoG9xSq5h89XxINddZP-L09RFZEbqO_g0f9eJHVV3h6-A/s1600/IMG_2211.jpeg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="776" data-original-width="1600" height="155" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgOvUycQc8Ho4NgDeLqGWGSQuQxT689qRJkBSsRX6rAL6IgTKLPDUJ3r1_H0_dFcfBOeUr2z5_UwWslW1SdVyHBCURVcRoG9xSq5h89XxINddZP-L09RFZEbqO_g0f9eJHVV3h6-A/s320/IMG_2211.jpeg" width="320" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj9UIayuWy4wYcKTRsPin0PMIYYVGtc5EV1CvgpaYsyGIKLACCrAWvP4HYTfDR_lmKL1ITcCiOtXa9v8fbNH6h6YYyK_cBKYTe6hO7dv5dwwuQQ1c8ASZW_M17ML6JLPT0qAuz7_w/s1600/IMG_2212.jpeg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="661" data-original-width="1600" height="132" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj9UIayuWy4wYcKTRsPin0PMIYYVGtc5EV1CvgpaYsyGIKLACCrAWvP4HYTfDR_lmKL1ITcCiOtXa9v8fbNH6h6YYyK_cBKYTe6hO7dv5dwwuQQ1c8ASZW_M17ML6JLPT0qAuz7_w/s320/IMG_2212.jpeg" width="320" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgUkK-pcWBXtMj-3kugCZayNY5FPlk2uuM30UmNpYiCak7p_n5j02AMwvzDA_Q91JyF5pmevI3Xs68r8s6YI-zkN_CrfFsysBeW1s96JxMZdcAK544UxA8zbUY1GZeJbwllIPTHjw/s1600/IMG_2213.jpeg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="715" data-original-width="1600" height="142" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgUkK-pcWBXtMj-3kugCZayNY5FPlk2uuM30UmNpYiCak7p_n5j02AMwvzDA_Q91JyF5pmevI3Xs68r8s6YI-zkN_CrfFsysBeW1s96JxMZdcAK544UxA8zbUY1GZeJbwllIPTHjw/s320/IMG_2213.jpeg" width="320" /></a></div>
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<i><b>from the Android tablet</b></i></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhFX8NTNbJHLZkoFermagzVIdm6G5FfoAxdyPGBy8xx7C43nnrjWDazlNAYBV397Gh648pR28B4LyHxHLiR8tXmvo2n3dPF8iXT7xwoD6x2RSSBEZfeWU0sDlGOmDF0O25ITJwtZQ/s1600/IMG_20191003_112928.jpeg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="627" data-original-width="1329" height="150" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhFX8NTNbJHLZkoFermagzVIdm6G5FfoAxdyPGBy8xx7C43nnrjWDazlNAYBV397Gh648pR28B4LyHxHLiR8tXmvo2n3dPF8iXT7xwoD6x2RSSBEZfeWU0sDlGOmDF0O25ITJwtZQ/s320/IMG_20191003_112928.jpeg" width="320" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEia9DG582aUac-8k1DKTRr5n5h5bIB6JLUtSPdIgYXNRlAU5bXc_fR1U-nscWa0JOnZUJScKjONdmuRHgltlPZ1P1356Xgcj5SSJ48t7e-wiVbApzbTGc-GichtJZJc2M9OjO7i_Q/s1600/IMG_20191003_113054.jpeg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="665" data-original-width="1298" height="163" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEia9DG582aUac-8k1DKTRr5n5h5bIB6JLUtSPdIgYXNRlAU5bXc_fR1U-nscWa0JOnZUJScKjONdmuRHgltlPZ1P1356Xgcj5SSJ48t7e-wiVbApzbTGc-GichtJZJc2M9OjO7i_Q/s320/IMG_20191003_113054.jpeg" width="320" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjGDlQzMNk-8eYGEdNTD7zmarRCQKQmtkk8eCZG7uYaWiHjYMGIXMWxl0XWRMKADUPABSMY5Bh4yYJ-8jW9iSn7bcxF1ABHe4-zdXTMU8biNsLPq4lhFf0NAK0vsD00BFwZ5uuIKg/s1600/IMG_20191003_113114.jpeg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="329" data-original-width="704" height="149" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjGDlQzMNk-8eYGEdNTD7zmarRCQKQmtkk8eCZG7uYaWiHjYMGIXMWxl0XWRMKADUPABSMY5Bh4yYJ-8jW9iSn7bcxF1ABHe4-zdXTMU8biNsLPq4lhFf0NAK0vsD00BFwZ5uuIKg/s320/IMG_20191003_113114.jpeg" width="320" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEggAwuBoTrmU0rRTd7SZV8JXFWIukqm5aR447d0GsIatAicyn9JCM3asMuizq-Eid61JGxMoaKLhKKlhGNMlRFOM_FFJAcQ3SqdV5QQxHgzQjT7I6BMn2a03g2w8JYBSOOtpjj3Ig/s1600/IMG_20191003_113127.jpeg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="369" data-original-width="806" height="146" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEggAwuBoTrmU0rRTd7SZV8JXFWIukqm5aR447d0GsIatAicyn9JCM3asMuizq-Eid61JGxMoaKLhKKlhGNMlRFOM_FFJAcQ3SqdV5QQxHgzQjT7I6BMn2a03g2w8JYBSOOtpjj3Ig/s320/IMG_20191003_113127.jpeg" width="320" /></a></div>
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<b><i>from the Fuji Finepix</i></b></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjLg2LPaQsSOw1dqudpkBG1iXoy86Rtb5ypWPvl0MUOk2nAVCS0n_-j7CNqezwFlsnWc2Y9HRdslUq9QYL0EUryxL6Vz18a6fiZ6oP3cPCWLaI0MQLbz0f_NopQ8O_0XtGRaosZbQ/s1600/DSCF2158.jpeg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="754" data-original-width="1600" height="150" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjLg2LPaQsSOw1dqudpkBG1iXoy86Rtb5ypWPvl0MUOk2nAVCS0n_-j7CNqezwFlsnWc2Y9HRdslUq9QYL0EUryxL6Vz18a6fiZ6oP3cPCWLaI0MQLbz0f_NopQ8O_0XtGRaosZbQ/s320/DSCF2158.jpeg" width="320" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEixcMN5gpGqRpR8MvtG1Qr7k1sa2k7_S6KmAQffJWdHawi3bPCrmGV1IOm-X-Pwc0VsFPmpLdG6tgO7AB3EQnmskkG1lnXPQbUzGWK9ZgfxYki1_k4UAthunKx4zTVG0NPK83lQQw/s1600/DSCF2159.jpeg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="719" data-original-width="1600" height="143" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEixcMN5gpGqRpR8MvtG1Qr7k1sa2k7_S6KmAQffJWdHawi3bPCrmGV1IOm-X-Pwc0VsFPmpLdG6tgO7AB3EQnmskkG1lnXPQbUzGWK9ZgfxYki1_k4UAthunKx4zTVG0NPK83lQQw/s320/DSCF2159.jpeg" width="320" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhL_rxuo_0wnpGi8SdePr-YT-QgibPnfT0L1c4ixNg3Ttkn3_z8Y6AgMvQhlA5gzDy4J5vS4TDv8YfRNqyy5w-fyNl-I2zT1wVn-oExj6M9H99qQP-COJDEtESqBT_lIQoYP3YABw/s1600/DSCF2160.jpeg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="697" data-original-width="1600" height="139" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhL_rxuo_0wnpGi8SdePr-YT-QgibPnfT0L1c4ixNg3Ttkn3_z8Y6AgMvQhlA5gzDy4J5vS4TDv8YfRNqyy5w-fyNl-I2zT1wVn-oExj6M9H99qQP-COJDEtESqBT_lIQoYP3YABw/s320/DSCF2160.jpeg" width="320" /></a></div>
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Finally I should make a note of how <b>my perception</b> of the colours varied;</div>
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I need to think about this a bit more to relate the spectra of the two bulbs to the likely sensitivities of the cameras; but, it does show that <a href="https://en.wikipedia.org/wiki/Metamerism_(color)" target="_blank">observer metameristic failure</a> is a things!</div>
Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-5646974.post-90810903301689950322019-09-23T11:34:00.001+01:002019-09-23T11:41:01.011+01:00What I saw at IBC2019<b>Eizo CG3145 “mk.2?” </b>– Revision of the current model “Prominence” monitor - <a href="http://philtechnicalblog.blogspot.com/2018/05/why-i-wouldnt-buy-sony-bvm-x300-in-2018.html" target="_blank">see my post from last year</a>.<br />
<br />
<div style="text-align: justify;">
It’s exactly the same dual Panasonic IPS (LCD) display module and modulated LED backlight as the current version (and indeed the Sony X310 replacement for the X300) with the following upgrades;</div>
<ol>
<li>Quad 3G and single-link 12G inputs for current gen 4K/UHD/HDR standards. If you need to go to 18G standards (so 4K, 12 bit, RGB and 60P) it still supports HDMI 2.0 and DP. Once nicety is that it has SDi out and can convert signal standard as an active loop-through (but not converting colour space, sampling structure etc – obviously),</li>
<li>Internal probe; a higher quality photometer than the 319X but I’ll have to test it against a “proper” probe before we make comment; they assured me ColourNavigator’s “sensor correlation” function would work as other CG-series displays. <a href="https://youtu.be/LB6HFOBJU2c" target="_blank">See my video</a>.</li>
<li>Three user-defined cages and BITC as per Sony’s 4k monitors – this has been mentioned by several facilities as reasons why they won’t leave Sony – aside from the BITC feature having been broken in the Sony displays since v.2 firmware I don’t believe grading room displays need either of these, but it’s good to have an answer (I’d say exactly the same as point 1. Above)</li>
<li>Much nicer control via a big knob on the front.</li>
<li>Price – will be the same as the current CG3145</li>
<li>Availability – they reckon there will be pre-production demo examples in January and supply at start Q2.</li>
</ol>
<div style="text-align: justify;">
They made some point about having improved the <i>FPGA code in the panel</i> for better sharpness – sounded like marketing waffle; and in truth savvy customers don’t want a monitor “sharpening up” their pictures; pixel-to-pixel is what’s needed; brutal honesty rather than the picture processing you get on a domestic TV.</div>
<br />
<br />
<b>Emerald KVM system from Black Box;</b> it comes in three product skews;<br />
<a href="https://www.blackbox.com/en-us/products/black-box-brand-products/kvm/control-room-kvm/4k-kvm-over-ip-switch">https://www.blackbox.com/en-us/products/black-box-brand-products/kvm/control-room-kvm/4k-kvm-over-ip-switch</a><br />
<ul>
<li>The basic – tops out at 2 x single-link displays (1920x1200) </li>
<li>The “professional” – same performance but has tighter integration with their manager</li>
<li>The 4K – supports a single 4096-pixel wide display.</li>
</ul>
Points to consider;<br />
<ol>
<li>Price – the basic and professional are very akin to Amulet pricing (bear in mind Amulet Tera2 products do 4 x single link or 2 x 4K displays) – so typically £1,000 per end-point (sender and receiver); Amulet external T2 would be £1,400 (sender) + £700 (receiver). The 4K product which is what now competes with DX-H4T/DZ4 from Amulet is around twice the price (about £3,900 for sender/receiver pair). Add onto this the cost of a broker (their own 1u Linux box) AND they heavily push you to Black Box managed switches (essential if you’re using all the broker features),</li>
<li>Encryption – AES256 with key-exchange is the clear via the broker’s database; we couldn’t sell this to anyone who is looking at a TPN audit,</li>
<li>Bandwidth – max’es out a gigabit Ethernet (in fact you need the second NIC if you want to use two screens); remember, Amulet plays nicely with internet-type bandwidths</li>
<li>Switch requirements – As mentioned, BlackBox manages switches preferred, but whatever you use jumbo frames and IGMP-snooping is required. Amulet plays nicely with all layer-2 ethernet switches.</li>
</ol>
Niceties;<br />
<ul>
<li>Broker is better to use than Tera connection manager</li>
<li>ZC supports both PCoIP and RDP (their protocol is Windows RDP!)</li>
<li>As you’d expect from a modern KVM it is reasonably transparent, but full-screen HD video playback was (I thought) worse than Amulet (and remember Amulet tops out at 200Mbit/sec rather than the 2 x GigE that the Emerald needs)</li>
</ul>
So in fairness I don’t think there is any scenario (other than owning existing plant) where we could sell it as a better option than Amulet (or a Teradici option).<br />
<br />
<br />
<b>Streambox’s DolbyVision remote workflow</b><br />
<a href="http://www.streambox.com/post-production/">http://www.streambox.com/post-production</a><br />
<br />
<div style="text-align: justify;">
StreamBox have implemented eCMU functionality in their Chroma range which means they can take the DolbyVision metadata across the IP-SDi feed and decode the rec.709 fold-down data at the far end and display dual-6G outputs on and HDR monitor and a rec.709 display (typ. a decent TV). The powerful thing is that by having the Dolby tone-mapping algorithm with all the lift/gamma/gain tweaks in the HDR stream they can produce a pixel & colour accurate SDR version at the far end with no extra bandwidth required. Super-cool.</div>
<div style="text-align: justify;">
<br /></div>
<br />
<b>Canon DP-V3120 4k/UHD/HDR grading monitor</b><br />
<a href="https://www.canon-europe.com/video-cameras/dp-v3120/">https://www.canon-europe.com/video-cameras/dp-v3120</a><br />
<br />
<div style="text-align: justify;">
We sold a few of the earlier gen Canon DP-V3010 4k displays and although they were good 4k displays their HDR abilities were more limited than the X300 – in fact today they would be an equivalent to a £3.5k Eizo CG319X.</div>
<div style="text-align: justify;">
The new monitor uses the same Panasonic panel & backlight as the Eizo and Sony, but in this case it is a single-layer IPS which means the blacks are probably not as good as the CG3145 and the X310. I’d have to test that when we can our hands on one.</div>
<ul>
<li>2,000Cdm<sup>-2</sup> max light output – probably because it’s only a single layer, they’re letting all the light through. Not sure why this is a benefit as nobody (Netflix, Fox, Warners) are specifying 2,000Cdm<sup>-2</sup> deliverables and the next bump to DolbyVision will be to 4,000Cdm<sup>-2</sup> so this seems to be neither fish nor fowl – much like the Flanders 3,000Cdm<sup>-2</sup> monitor.</li>
<li>Tone-mapped false colour display – this is very nice; As far as I could tell this is nerly as good as Leader’s “CineZone” display but available in the monitor.</li>
<li>Same set of inputs as the new Eizo</li>
<li>Sub £20k price tag</li>
</ul>
<br />
<b>ColourSpaceCMS colour management and LUT building software.</b><br />
<a href="https://www.lightillusion.com/colourspace.html">https://www.lightillusion.com/colourspace.html</a><br />
<br />
We sometimes sell a LightSpace license with Klein colour probes and I tend to then provide a day’s training (doing it next week at a customer's).<br />
<ul>
<li>Much more modern interface – lots of people complain that LightSpace looks a bit 1990s and things like loading LUTs and talking to patch generators takes a few mouse clicks rather than being auto-detected. ColourSpace seems to address all of this. I've never found this to be an issue; if you've spent thousands on a probe and software you should really get familiar with it.</li>
<li>Profiling engine can run whilst you are manipulating LUTs – very cool; will go some way to addressing the two hours of thumb-twiddling I have to do whilst profiling a display.</li>
<li>Multiple probe support – you can be profiling two displays at a time; but with probes costing >£6k I wonder who will use this?! Monitor manufacturers at their factory, probably.</li>
<li>Price – near-free upgrade from LightSpace depending on age of license.</li>
</ul>
We never really offer LightSpace as a product by itself; always as part of a package and as part of the colourimetry training day.<br />
<br />
<br />
<b>Leader LV5900 – 8K test and measurement</b><br />
<a href="https://www.leader.co.jp/en/event/7318/">https://www.leader.co.jp/en/event/7318</a><br />
<ul>
<li>8K (so quad 12G) version of the LV5600/LV7600 series we sell.</li>
<li>Price – silly money! >£50k basic</li>
</ul>
<br />
<b>AJA Image Analyser – HD/UHD/4K/HDR test and measurement</b><br />
<a href="https://www.aja.com/products/hdr-image-analyzer">https://www.aja.com/products/hdr-image-analyzer</a><br />
<br />
They’ve been selling this for a year as a competitor to the Leader but I don’t know it’s HDR abilities.<br />
<ul>
<li>Quad-12G – now can operate as a 4 x 4K machine; perhaps an OB that is sourcing Slog3 cameras and delivering both HLG and rec.709 would find this udeful?</li>
<li>Price - £16k (so cheaper than an HDR/4K optioned Leader)</li>
</ul>
<span style="text-align: justify;">Also – all the Hi5-4K+ and associated boxes now support Dolby metadata passthrough so no more hooking up the USB control to force displays to switch between rec.709/PQ/HLG. Nice.</span><br />
<br />
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<i>The Bryant Unlimited cable manufacturer's meal - the highlight of my professional year!</i></div>
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<br />Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-5646974.post-58297859671253485402019-08-03T13:33:00.005+01:002023-05-12T11:20:30.962+01:00Calibrating the Calibrator - Colour management with Eizo CG319XI've spent a lot of time demo'ing these monitors recently and the thing that tickles customers the most is correlating the internal sensor to an external probe.<br />
<br />
<a href="https://youtu.be/LB6HFOBJU2c">https://youtu.be/LB6HFOBJU2c</a><br />
<br />
<iframe allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen="" frameborder="0" height="315" src="https://www.youtube.com/embed/LB6HFOBJU2c" width="560"></iframe>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-5646974.post-57763209719136395462019-04-20T11:45:00.000+01:002019-04-20T17:06:39.686+01:00Electronics, disasterous career choices and good techy YouTubers...<div style="text-align: justify;">
The last few months have been a bit of an education for me; I changed jobs twice and kinda wished I hadn't - neither has been ideal. However, I wound up with six weeks with not much to do (I did a few days of freelance colour work) but I took the opportunity to finish off my home fixing bench;</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg479RNj3pEMAmZFSN51wFvWtFxlYYUcGXZelTuSORb7fC7SsJt4yj47BOAgknHxoWm_0uOrcPDlQubQZbCGr0HPlII87uWOSHMabyTlP5FE28_hrq2nQD6XTn0qicEcGVrN7CHhA/s1600/IMG_0222.jpeg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1233" data-original-width="1600" height="307" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg479RNj3pEMAmZFSN51wFvWtFxlYYUcGXZelTuSORb7fC7SsJt4yj47BOAgknHxoWm_0uOrcPDlQubQZbCGr0HPlII87uWOSHMabyTlP5FE28_hrq2nQD6XTn0qicEcGVrN7CHhA/s400/IMG_0222.jpeg" width="400" /></a></div>
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After this I resorted to my usual cathartic activity of building a hand-held games console based around a RasPi and fitted into the dead carcass of an old Gameboy/Gamegear etc. I didn't make any videos of this project (unlike the Gamegear from last year <a href="https://youtu.be/Mt1VP-AjSQU">https://youtu.be/Mt1VP-AjSQU</a>);</div>
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<iframe allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen="" frameborder="0" height="315" src="https://www.youtube.com/embed/Mt1VP-AjSQU" width="560"></iframe>
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<br />
BUT, back to the most recent build; I was really pleased how it worked out, probably the most tidy one I've done to date. I also implemented a proper shut-down script so the power button doesn't just crash the Pi (and I monitor the LiPo's voltage to avoid the system crashing that way too).</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhYVHvHRKS5P5EbC_sBMwVPozSFKL2zF6j9JPQWnEaDfHzUjl-z1hoVNLEilnC9WmdwrupxJaBwztPeLWeCpLP2a-oZLhXxXkZ19InL4aR_wFF7nOH-H12DO95M_Ox5EUm4KLWerg/s1600/IMG_0331.jpeg" imageanchor="1" style="clear: right; float: right; margin-bottom: 1em; margin-left: 1em;"><img border="0" data-original-height="1600" data-original-width="1200" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhYVHvHRKS5P5EbC_sBMwVPozSFKL2zF6j9JPQWnEaDfHzUjl-z1hoVNLEilnC9WmdwrupxJaBwztPeLWeCpLP2a-oZLhXxXkZ19InL4aR_wFF7nOH-H12DO95M_Ox5EUm4KLWerg/s320/IMG_0331.jpeg" width="240" /></a><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjPoqw3eLN3mjRYyGG2sH9X0DNr66C4lG98RJ8PlZrNSlVEQR01fZpsyE-noDDY3E9MrIy_drhAmpNcXuuB-_EEEiDi3z8dLavfh0C2fojK0ibccPHP2YzrE5Ec745VsN6IHq8avA/s1600/IMG_0330.jpeg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1600" data-original-width="1200" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjPoqw3eLN3mjRYyGG2sH9X0DNr66C4lG98RJ8PlZrNSlVEQR01fZpsyE-noDDY3E9MrIy_drhAmpNcXuuB-_EEEiDi3z8dLavfh0C2fojK0ibccPHP2YzrE5Ec745VsN6IHq8avA/s320/IMG_0330.jpeg" width="240" /></a></div>
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<div style="text-align: justify;">
The other thing I took to whilst off was to start learning the Python programming language - if you're looking to get back up to speed with coding Python seems to cover a lot of the principles of modern scripting languages - the thing that has blown me away the most so far is the <i><b>list data type</b></i> - a list can have different data types within it! Perhaps all modern languages have this, but my degree in Maths and Programming in the mid-eighties did not prepare me for such things!</div>
<div style="text-align: justify;">
Can I recommend Jamie Chan's book "<i>Learn Python in one day and learn it well</i>" - as someone who still has a bit of C and VB experience it has bee good for me.<br />
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<br />
I have also been catching up on my favourite electronics YouTubers;<br />
<br />
<a href="https://www.youtube.com/user/rossmanngroup">https://www.youtube.com/user/rossmanngroup</a><br />
Louis Rossman - Apple repair guy and the best example of surface-mount rework and diagnostics you'll see.<br />
<br />
<a href="https://www.youtube.com/user/bigclivedotcom">https://www.youtube.com/user/bigclivedotcom </a><br />
Big Clive - more focussed on big volts and tearing down badly made power electronics!<br />
<br />
<a href="https://www.youtube.com/user/greatscottlab">https://www.youtube.com/user/greatscottlab</a><br />
Great Scott! My kind of small project builds with something of a focus on Arduino<br />
<br />
<a href="https://www.youtube.com/user/FFcossag">https://www.youtube.com/user/FFcossag</a><br />
A brother broadcast engineer who fixes stuff<br />
<br />
<a href="https://www.youtube.com/channel/UCDbWmfrwmzn1ZsGgrYRUxoA">https://www.youtube.com/channel/UCDbWmfrwmzn1ZsGgrYRUxoA</a><br />
The Post Apocalyptic Inventor - motors and generators are the emphasis of his builds<br />
<br />
<a href="https://www.youtube.com/user/EEVblog">https://www.youtube.com/user/EEVblog</a><br />
Dave Jones of the eevBlog is a design engineer who seems to know everything about electronics; really engaging style too.<br />
<br />
<div style="text-align: justify;">
So, not sure how 2019 is going to play out - one thing I have realised is that my plans of giving up all this broadcast engineering nonsense are perhaps closer than I thought; maybe the teaching PGCE is <b><i>even closer</i></b> than I thought...</div>
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Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-5646974.post-59480790664145522042019-01-12T10:35:00.002+00:002019-01-12T17:21:42.094+00:00Is there an HDR mastering display that costs less than £20k? Not yet.<div style="text-align: justify;">
I was asked to take a look at the ASUS PA32U monitor - a 32" display that (when I first saw it last year) was initially an sRGB, Adobe RGB, HDR10 high-end graphics/gaming monitor. It comes in at sub £2k and so is expensive for home or office use but almost free from a film/TV perspective. Most interetsingly it could hit >1,000Cdm<sup>-2</sup> peak white and unlike OLED displays (typ. Sony BVM-X300) it doesn't suffer ABL as more than a small percentage of the display hits peak white.</div>
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<br /></div>
<div style="text-align: justify;">
I gave the manufacturer a few pointers - essentially if it is going to have any application in film and TV it should at least support HLG and DolbyPQ. So, just before christmas a new itteration of the monitor arrived and here is a little video.</div>
<br />
A few things to note;<br />
<br />
<ol>
<li>Terrible "blooming" near black; if it was a CRT it would be akin to bad internal reflection within the tube.</li>
<li>The blue primary is not as good as it should be - it can't even hit 100% of rec.709</li>
<li>Ironically, however, it does manage 84% of rec.2020 - just shows you can't get too hung up on very saturated colours,</li>
<li>There is some sort of noise-coring going on; you should be able to disable that in the menues.</li>
</ol>
LightSpace reports; <a href="http://www.engineersbench.com/phil/docs/ASUS_PA32U/">http://www.engineersbench.com/phil/docs/ASUS_PA32U/ </a><br />
<ol>
</ol>
<a href="https://youtu.be/hYCJh9ujhxw">https://youtu.be/hYCJh9ujhxw</a><br />
<br />
<iframe allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen="" frameborder="0" height="315" src="https://www.youtube.com/embed/hYCJh9ujhxw" width="560"></iframe>
Unknownnoreply@blogger.com4tag:blogger.com,1999:blog-5646974.post-67644583964883735242018-12-09T17:10:00.003+00:002018-12-09T17:10:31.763+00:00Compressing spoken word audio for podcasts<div style="text-align: justify;">
What a terribly lax blogger I've been over the last few months; part of that was due to a couple fo trips to Saudi to finish building a facility in Riyadh (more about that to come; did you know that protective mains earths are not mandated there?!).</div>
<div style="text-align: justify;">
Anyway - I look after a couple of podcasts (just spoken word content) and for the longest time I've been using the Conversations Network Levelator to compress the dynamic range of each clip before I import them into Audacity and then edit/normalise them before exporting as an MP3 for upload. Imagine my horror when after switching to a new (old) laptop that I installed Mojave (OS-X 10.14) onto I could no longer use The Levelator; and it's a thing - lots of folks complaining online about it, but it's abandoware so what are you going to do?</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhCh26RTTaUN_ckWRVRkKroH1GP66kBHG6v-FxDuPz6_Q6kd64Vf8bvHlpXejv1mKS4Ji4KUlQwWOOtq5sxpohZsdsnidDJudBit1T-hHQyL1_Kmv_9zF9l5Zo1uphzVcGm59sBOA/s1600/Screenshot+2018-12-09+at+15.35.08.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="430" data-original-width="500" height="343" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhCh26RTTaUN_ckWRVRkKroH1GP66kBHG6v-FxDuPz6_Q6kd64Vf8bvHlpXejv1mKS4Ji4KUlQwWOOtq5sxpohZsdsnidDJudBit1T-hHQyL1_Kmv_9zF9l5Zo1uphzVcGm59sBOA/s400/Screenshot+2018-12-09+at+15.35.08.png" width="400" /></a></div>
<div style="text-align: center;">
<i>You upgrade the OS and some software stops working...!</i></div>
<br />
People listen to podcast in noisy environments; in cars, on the bus in earbuds and in other non-ideal listening environments. So, like talk radio the best thing is to compress the signal until there is almost no dynamic range and then normalise it to less than a dB under 0dBfs. Then it's a loud and punchy as it possibly could be and it'll be usable in bad listening situations. The Levelator was brilliant at doing this, but I thought I should at least roll my sleeves up and see how good the compressor in Audacity is, and blow me down it isn't bad!<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjxt7osG82YqFs4dbdM5pedXGkjV7KNz2cCjLZCNl6e49n2OYYaFguKW-zvrgxRf0yw1sCtKIT2227x2o3928DCg1qi9IfsM00GxRwyrR8VQRxgNkTNgtmy4L_4GPMFW5Kg7HiTqQ/s1600/Screenshot+2018-12-09+at+14.47.39.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="530" data-original-width="829" height="255" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjxt7osG82YqFs4dbdM5pedXGkjV7KNz2cCjLZCNl6e49n2OYYaFguKW-zvrgxRf0yw1sCtKIT2227x2o3928DCg1qi9IfsM00GxRwyrR8VQRxgNkTNgtmy4L_4GPMFW5Kg7HiTqQ/s400/Screenshot+2018-12-09+at+14.47.39.png" width="400" /></a></div>
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After a bit of tinkering around with the ratio and threshold I arrived at these values as being best for audio that is peaking around -10dBfs (I'm a broadcast engineer, after all!) - it produces speech that still sounds OK, but has almost no dynamic range!<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhifDooCs3q1ZXRMNLc0ktMJUjt36xH_WN42Z5ZHkTSlwN2XLsVyOQay2j5z7zRP8LwVUkQcxYjqoHwHDn7w7QvQCB5sSjwzX6yngBeuIblPxqPteJPmCaBwcRUxCRRg67l0Jho4w/s1600/Screenshot+2018-12-09+at+15.33.51.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="380" data-original-width="809" height="187" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhifDooCs3q1ZXRMNLc0ktMJUjt36xH_WN42Z5ZHkTSlwN2XLsVyOQay2j5z7zRP8LwVUkQcxYjqoHwHDn7w7QvQCB5sSjwzX6yngBeuIblPxqPteJPmCaBwcRUxCRRg67l0Jho4w/s400/Screenshot+2018-12-09+at+15.33.51.png" width="400" /></a></div>
<div style="text-align: center;">
<i>In this clip the band starts at around 2'15"</i></div>
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Sticking this .WAV file through the compressor set up (above) produced a very usable result which I then normalised before joining it to the rest of the segments of the podcast. <br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgxIQrfyxYp7VivIyqZMvxpyD_XwfsT26VbbXa9oEnuH0oLxSvpXGemOZ5Z6z2X17SRUpdnqvRa_4r7DlmHUMYjdamv2IBNm_nSGLR2GUdqwU-J1WX0LnqAviWty1HYlNAItt08yg/s1600/Screenshot+2018-12-09+at+15.34.11.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="384" data-original-width="789" height="193" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgxIQrfyxYp7VivIyqZMvxpyD_XwfsT26VbbXa9oEnuH0oLxSvpXGemOZ5Z6z2X17SRUpdnqvRa_4r7DlmHUMYjdamv2IBNm_nSGLR2GUdqwU-J1WX0LnqAviWty1HYlNAItt08yg/s400/Screenshot+2018-12-09+at+15.34.11.png" width="400" /></a></div>
<div style="text-align: center;">
<i>It looks like there is a lot of noise, but it's the sound of a very large room and on the speakers is sounds OK. </i></div>
<br />Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-5646974.post-39009274717767122392018-07-11T15:06:00.004+01:002018-07-11T15:06:42.149+01:00Video Compression Fundamentals; a Tech Breakfast presentation<iframe allow="autoplay; encrypted-media" allowfullscreen="" frameborder="0" height="225" src="https://www.youtube.com/embed/ZejjAXSXyZA" width="400"></iframe>
<br />
<a href="https://youtu.be/ZejjAXSXyZA">https://youtu.be/ZejjAXSXyZA</a><br />
<br />
Part of the ongoing series of Tech Breakfast presentations at Jigsaw24, Golden Square.<br />
<br />
My notes <a href="http://www.engineersbench.com/phil/docs/TechBreakfastNotes/VideoTransfer/VideoCompression.pdf" target="_blank">are here</a> and I'm available for birthdays, weddings and bar mitzvahs.Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-5646974.post-40262620370060447262018-05-16T16:14:00.000+01:002023-05-12T11:20:30.962+01:00Why I wouldn't buy a Sony BVM-X300 in 2018 (if it was my money)<div style="text-align: justify;">
For a couple of years the Sony BVM-X300 has been the 4k/HDR monitor of choice for Soho edit and grading suites. It is an OLED monitor and can (with some limits) hit 1,000 Cd/m<sup>2</sup> peak white in it's HDR modes (which include HLG, Dolby PQ and SLog3 camera gamma).</div>
<div style="text-align: justify;">
<br /></div>
<div style="text-align: justify;">
It was the first monitor to be widely regarded as good enough for Dolby Vision mastering (and by extension Netflix deliverables). It was around the £20k mark when it launched, but by last year the price had crept up to mid-twenties and with the v2 of the monitor (which brought a second quad-SDi input and an HDMI input) which launched a year ago it now lists at £32k; <i><b>but</b></i> we all know nobody ever pays list for Sony...!</div>
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<div style="text-align: justify;">
In recent months I've really taken to the Eizo CG3145 which (although an IPS/LCD monitor) is broadly similar in spec to the Sony, but; bear in mind the X300 suffers the following;</div>
<ol>
<li>Noise in the blacks; when I calibrate them I have to do blacks at 5% grey to get a clean reading (and my probe goes down to 0.01 Cd/m<sup>2</sup>) – the Eizo will read cleanly at 2% grey. Watch <a href="https://twitter.com/twitter/statuses/699578206085586944" target="_blank">this video</a> (hosted on my Twitter feed) - it's an X300 around 3 Cd/m<sup>2</sup></li>
<li>Max. 8% peak white before the orange PSU-fault LED comes on and the display starts to dim/de-saturate in HDR modes; at the recent Jigsaw24 I showed the "OLED killer" which you can <a href="https://youtu.be/8X0kfQ6uVYw" target="_blank">get here</a>.</li>
<li>Two years in and several Soho X300s are now showing burn-in (particularly where the 3840-pixel UHD and 4096 pixel-4k rasters differ) </li>
</ol>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi8fNE-P4dDCwCXiIGpZT1wmHLzo10nPKQPF5e7rY5fuIHAhsqh3peDm9ctCfBCPzAhFA3TX9clP37i0TA9BsNqnFBVnviHV6H9sk0aSfOjlmi8NUP31DrRZ5PCDif5eDMIMErtkA/s1600/D7tu1spWwAEMwXm.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1600" data-original-width="1272" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi8fNE-P4dDCwCXiIGpZT1wmHLzo10nPKQPF5e7rY5fuIHAhsqh3peDm9ctCfBCPzAhFA3TX9clP37i0TA9BsNqnFBVnviHV6H9sk0aSfOjlmi8NUP31DrRZ5PCDif5eDMIMErtkA/s320/D7tu1spWwAEMwXm.jpg" width="254" /></a></div>
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<div style="text-align: justify;">
£10k less list price and available now (the X300 is in such short supply that you can't get one in London currently) also add to the Eizo’s advantages. Integration with LightSpaceCMS (pretty much the industry standard for colour management) is very tight whereas the X300 only talks to Sony’s very clunky colour software (no LUT management, six-point calibration only). </div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgtgWAADsEzHO0CZvoUtTzc0MW5w4RUEdxlVE3oMozf6RCBiJs01NcAc8-p6hrt9BTx4SJiemsCpd_EPAOjFcQ4qcrJ-XTWC4JSzBaJoS0b24KwN3KKXFSzHxsD-r0oSMT102SjAQ/s1600/IMG_0053.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1600" data-original-width="1140" height="400" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgtgWAADsEzHO0CZvoUtTzc0MW5w4RUEdxlVE3oMozf6RCBiJs01NcAc8-p6hrt9BTx4SJiemsCpd_EPAOjFcQ4qcrJ-XTWC4JSzBaJoS0b24KwN3KKXFSzHxsD-r0oSMT102SjAQ/s400/IMG_0053.jpg" width="283" /></a></div>
<div style="text-align: center;">
<i>The Eizo easily allows LUT upload; this SLog3 (in slot 8) was imported via LightSpace.</i></div>
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</div>
<div style="text-align: justify;">
<a href="https://www.displaydaily.com/article/press-releases/eizo-announces-coloredge-prominence-cg3145-is-the-first-hdr-monitor-in-the-world-to-be-awarded-class-1b-by-the-irt">ColorEdge PROMINENCE CG3145 is the first HDR monitor in the world to have its HDR and SDR reproducibility evaluated and awarded by the German Broadcast Technology Institute.</a><br />
<br />
The Eizo has recently been certified as both a Dolby Vision mastering display as well as having Netflix's blessing.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgujtG0UFyzxt3KT_SpGZTZRjGGXfcZFYuKqU4VotVTqHK6-ETbEY9lzq9U8QRuQMLrhq3Rvf-DrI2k6wIeKfU9KoZz8rfMLQvVJVc0LVW3d-iQ6AP5zQqdFm7vYkGkVbqU4VGwFQ/s1600/3145Netflix.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="792" data-original-width="1081" height="292" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgujtG0UFyzxt3KT_SpGZTZRjGGXfcZFYuKqU4VotVTqHK6-ETbEY9lzq9U8QRuQMLrhq3Rvf-DrI2k6wIeKfU9KoZz8rfMLQvVJVc0LVW3d-iQ6AP5zQqdFm7vYkGkVbqU4VGwFQ/s400/3145Netflix.png" width="400" /></a></div>
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One objection I've heard is that the X300 covers 85% of rec.2020 whereas the CG3145 only covers ~83%. It's the kind of objection that someone with a poor grasp of colourimetry makes. My answer to that is "<a href="https://en.wikipedia.org/wiki/MacAdam_ellipse" target="_blank">MacAdam ellipses</a>" - look at the Wikipedia article and tell me anyone can see the (Just Noticable!) differences.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjP5Uy9xRBqLkW16wGugMDeKaSvE1R3NyhjZT2GV8XLqkxBc3dEOnTuEObkguykCyKP3KzxYe0bNEicZ1hoostyag75vKs-pWYdY_-gdu1wq3UkoRdLQxsc_DYdgliKo2rRyNLhyg/s1600/Screen+Shot+2018-05-16+at+11.16.12.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1486" data-original-width="1560" height="380" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjP5Uy9xRBqLkW16wGugMDeKaSvE1R3NyhjZT2GV8XLqkxBc3dEOnTuEObkguykCyKP3KzxYe0bNEicZ1hoostyag75vKs-pWYdY_-gdu1wq3UkoRdLQxsc_DYdgliKo2rRyNLhyg/s400/Screen+Shot+2018-05-16+at+11.16.12.png" width="400" /></a></div>
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At the recent HDR Summit at Dock10 in Media City, Salford we had more than ten HDR-capable displays.<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjTC_nQAHewrRn1B0btxYviMRDmmN9e75kEmIuCl_07qGwtdoIiVJW3ozBHVM-teZ22wSAmoBVVK-T0ibV6qPF4UhMxiqaTchzCcsKNst6LIxOp5-4rkEzUTGRAAD1TJYXbAvpjiQ/s1600/IMG_0338.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="842" data-original-width="1600" height="210" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjTC_nQAHewrRn1B0btxYviMRDmmN9e75kEmIuCl_07qGwtdoIiVJW3ozBHVM-teZ22wSAmoBVVK-T0ibV6qPF4UhMxiqaTchzCcsKNst6LIxOp5-4rkEzUTGRAAD1TJYXbAvpjiQ/s400/IMG_0338.jpg" width="400" /></a></div>
Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-5646974.post-37455490327359922212018-03-14T21:40:00.001+00:002018-03-14T21:45:08.507+00:00Electrical Safety in Film & TV + 18th Edition; Tech Breakfast presentation<div style="text-align: justify;">
BS 7671 is the national standard to which all electrical installations
should conform. The 18th Edition IET Wiring Regulations contains
important new information for all electrical installers and engineers.</div>
<div style="text-align: justify;">
In the next Tech Breakfast I focus on the 18th edition of the The Institution of Engineering and Technology (IET) regs, which will debut this summer & I review best practice for designing and constructing power distribution in machine rooms and remote data centres for film and TV.</div>
<div style="text-align: justify;">
<br />
Electrical safety is one thing no broadcast engineer can ignore. </div>
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<br /></div>
<div style="text-align: justify;">
<a href="https://youtu.be/dsuQVR1wNKc">https://youtu.be/dsuQVR1wNKc</a><br />
<a href="https://electrical.theiet.org/wiring-matters/issues/61/bs-7671-the-18th-edition-report/" target="_blank">https://electrical.theiet.org/wiring-matters/issues/61/bs-7671-the-18th-edition-report/ </a></div>
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<div style="text-align: justify;">
<br /></div>
<iframe allow="autoplay; encrypted-media" allowfullscreen="" frameborder="0" height="315" src="https://www.youtube.com/embed/dsuQVR1wNKc" width="560"></iframe>Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-5646974.post-17974352011170648332018-02-20T17:43:00.001+00:002018-02-20T17:43:53.498+00:0012G cabling - test results and a video presentation<div style="text-align: justify;">
I presented a recent Tech Breakfast at Jigsaw24, Golden Square. Here I detail the tests we've done across four cable types and how they perform at twelve gigabits/sec (as per SMPTE 2082-1).</div>
<div style="text-align: justify;">
We've recently taken on Leader as a <a href="http://www.leaderamerica.com/product/lv5490/" target="_blank">manufacturer of test sets</a> and they excel in several areas - namely UHD/4K/HDR and 12G physical layer measurements. </div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgzU6_tjt4_cxrtHRROJZhCvIjUywOMU8y3MB9o4MqroVraXAGUP8z8fn01Ki3EuyE7QgRQ4r4PdE3CQVuIpRutojLfgmcCkMz3hf4QRbG9Nf6a8Zq4K0VLBqaLeaUbvgYpbqsXdA/s1600/Screen+Shot+2018-02-20+at+17.34.01.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="858" data-original-width="1600" height="339" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgzU6_tjt4_cxrtHRROJZhCvIjUywOMU8y3MB9o4MqroVraXAGUP8z8fn01Ki3EuyE7QgRQ4r4PdE3CQVuIpRutojLfgmcCkMz3hf4QRbG9Nf6a8Zq4K0VLBqaLeaUbvgYpbqsXdA/s640/Screen+Shot+2018-02-20+at+17.34.01.png" width="640" /></a></div>
<div style="text-align: center;">
<i>all the specs for SMPTE 2082-1</i></div>
<br />
<div style="text-align: justify;">
I got through all the details in the video (below <a href="https://youtu.be/cePp4LdDdS4" target="_blank">and on YouTube</a>) but you can snag <a href="http://www.engineersbench.com/phil/docs/TechBreakfastNotes/TechBreakfast_Feb2018_12G/" target="_blank">my results here</a> - if you go into the 12G folder you can see the screen grabs for all the eye patterns - the filename number related to the test line <a href="http://www.engineersbench.com/phil/docs/TechBreakfastNotes/TechBreakfast_Feb2018_12G/Results.pdf" target="_blank">in the PDF</a>. The Powerpoint presentation is in there too; but if you watch the video I cut all the slides full-screen as appropriate.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgKCx_AsMoHlcffDd8_9r37HTIYVrgZtzbScw3U6XVVOE0YKGk-CMQi2NKlyJwN_7OLGXdYCI8Bn3oR0MShgbhbrNcaHCZOWL3qb-JrkxMSU-_0kFiuP-Ams6jmlisJwGuNXc3DDA/s1600/Screen+Shot+2018-02-20+at+17.26.58.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="858" data-original-width="1600" height="339" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgKCx_AsMoHlcffDd8_9r37HTIYVrgZtzbScw3U6XVVOE0YKGk-CMQi2NKlyJwN_7OLGXdYCI8Bn3oR0MShgbhbrNcaHCZOWL3qb-JrkxMSU-_0kFiuP-Ams6jmlisJwGuNXc3DDA/s640/Screen+Shot+2018-02-20+at+17.26.58.png" width="640" /></a></div>
<br />
<i><b>The cable types are;</b></i><br />
<br />
SD05 - Belden 1855; otherwise known as "Image 360"<br />
SD10 - Belden 1694<br />
SD50 - Belden 1505; otherwise known as "Image 1000"<br />
SD73 - Belden 7731 - about the most ungainly cable you can crimp a BNC onto!<br />
<br />
<br />
<iframe allow="autoplay; encrypted-media" allowfullscreen="" frameborder="0" height="315" src="https://www.youtube.com/embed/cePp4LdDdS4" width="560"></iframe>Unknownnoreply@blogger.com1tag:blogger.com,1999:blog-5646974.post-40658739383346319262017-12-06T18:05:00.000+00:002017-12-06T18:05:03.835+00:00Fibre for breakfast - keeps you regular...I've have been a terrible blogger over the last couple of months; just super-busy at work, but I have done a couple of presentations in Jigsaw24's ongoing series of <a href="http://www.jigsaw24.com/fcp/content/events/content#techBreakfastPast" target="_blank">Tech Breakfasts</a>.<br />
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<iframe allow="encrypted-media" allowfullscreen="" frameborder="0" gesture="media" height="315" src="https://www.youtube.com/embed/yE8p_f-CU_g?rel=0" width="560"></iframe>
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<iframe allow="encrypted-media" allowfullscreen="" frameborder="0" gesture="media" height="315" src="https://www.youtube.com/embed/63Qhb-8G8wg?rel=0" width="560"></iframe>
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All the slides are <a href="http://www.engineersbench.com/phil/docs/TechBreakfastNotes/" target="_blank">here</a>.Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-5646974.post-16903247879981136672017-09-22T10:35:00.002+01:002017-11-20T15:14:13.898+00:00A few notes on DolbyPQ & the new 4k AppleTV and TV High Dynamic Range.<div style="text-align: justify;">
<span style="color: blue;"><b>STOP PRESS!</b> <i>27th Sept. 2017 Update</i>;</span><br />
<br />
<span style="color: blue;">So it turns out that the new <a href="http://appleinsider.com/articles/17/08/05/apple-tv-with-4k-uhd-10-bit-hdr-and-dolby-vision-revealed-by-homepod-firmware/amp/" target="_blank">AppleTV does support HLG</a>.</span><br />
<span style="color: blue;"><br /></span>
<br />
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<span style="color: blue;"><a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg-Ff-TGlglhlCNFz2O2YGepQvd_NVqBR2i9skcDj2arFaJpM9sUW51X__X6bTAWv2yPCLIr9cq5gbGJrypvs5ry4iAYfTYE2teJ7aqzqtJu9Yv-HPElDS36Wg6qcwDQM0icfbqyQ/s1600/22298-26761-DGfil_tXoAIT2FTjpg-large-l.jpg" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="108" data-original-width="388" height="89" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg-Ff-TGlglhlCNFz2O2YGepQvd_NVqBR2i9skcDj2arFaJpM9sUW51X__X6bTAWv2yPCLIr9cq5gbGJrypvs5ry4iAYfTYE2teJ7aqzqtJu9Yv-HPElDS36Wg6qcwDQM0icfbqyQ/s320/22298-26761-DGfil_tXoAIT2FTjpg-large-l.jpg" width="320" /></a></span></div>
</div>
<div style="text-align: justify;">
<span style="color: blue;">- Why did it take somebody hacking around with a firmware update to discover it; perhaps big corporations (Apple and Dolby) talk and would rather not highlight the fact?</span><br />
<br />
<br />
HDR is half my life at the moment; the distinction between "Display Referred" and "Scene Referred" video is lost on most people, but is pretty central to understanding why the BBC/NHK "Hybrid Log Gamma" system is ten times more appropriate for television (non-theatrical video) vs anything based on the SMPTE 2084 (AKA Dolby/HDR10 etc) curve.</div>
<br />
For my presentation on "intro to HDR for TV" <a href="http://www.engineersbench.com/phil/docs/HDRPPT.pdf" target="_blank">download here</a>.<br />
<ol>
<li><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g"><i>Display
Referred</i> HDR makes no sense for TV (when I say TV I mean all non
theatrical video). DolbyPQ makes video dimensioned (so code values
actually represent light levels) which makes a lot of sense when you
have complete control over the environment
you're viewing in - a theatre. To define where black and white sit (and
actually assign light-levels to them) is problematic for TV workflows.
Remember, you have to give the colourist/racks-engineer/domestic-viewer
the liberty to set black according to the room. <span style="color: blue;">Although BT.1886 is commonly accepted to mean 100</span></span></span></span><span style="color: blue;"><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g"><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g">Cdm<sup>-2</sup></span></span></span> peak white a lot of colourists drive their rooms at </span></span></span><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g"><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g">80</span></span></span><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g"><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g">Cdm<sup>-2</sup></span></span></span> </span></span></span>and at least one film guy I know prefers to work at </span></span></span></span><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g"><span style="color: blue;"><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g">60</span></span></span></span><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g"><span style="color: blue;"><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g">Cdm<sup>-2</sup></span></span></span></span>. </span></span></span>Also - what happens in
three years when everyone is selling TVs with specular highlights that
can hit 2,000Cdm<sup>-2</sup> and people can see the difference between PQ content
mastered with peaks at 1,000</span></span></span><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g"><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g">Cdm<sup>-2</sup> </span></span></span>( the current standard) and new
content? The same will be true all the way up to Dolby's max light level
of 10,000</span></span></span><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g"><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g">Cdm<sup>-2</sup></span></span></span>. Dolby at least has the benefit of dynamic metadata to
allow or this, but HDR10 is static metadata and so has all the problems
of display-referred HDR with none of the DolbyPQ benefits.</span></span></span></li>
<li><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g"><span class=" UFICommentActorAndBody"> <span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g">BBC/NHK
HLG is a much more pragmatic solution as it doesn't assign code-value
to light-levels (when has that ever been a thing in TV?!) and allows HDR
content to look good on all devices capable of displaying it; tablets,
TVs, laptops etc. It also allows the
broadcasters to make a gradual change to HDR. None of the broadcasters
I've spoken to have any appetite for having Dolby CMUs all over the
place to manage the metadata (which, being a licensed format, they would
be obliged to have). HLG also tracks 1886 for most of the curve (to
around 65%) which means conversion to/from is easier and even when you
get it wrong the pictures look OK. It's why scene-referred video makes
sense for TV.</span></span></span></span></span></span></li>
<li><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g"><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g"><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody">Having
seen the same SLog3 (so camera HDR gamma) played out from Transkoder in
both DolbyPQ (mastered at 1,000</span></span></span></span></span></span></span></span></span><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g"><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g"><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody"><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g">Cdm<sup>-2</sup></span></span></span>) next to the same machine
converting to HLG with two Sony X300 monitors set for the appropriate
gamma curves and the same Rec.2020 colour calibration you could not tell
them apart in a blind viewing.</span></span></span> </span></span></span></span></span></span></li>
<li><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g"><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g"><span class=" UFICommentActorAndBody"> <span data-ft="{"tn":"K"}"><span class="UFICommentBody">It's
typical Dolby - they are trying to dominate the domestic space by
shoe-horning their theatrical format into TVs. Broadcasters get hobbled
with licensing costs, onerous upgrade requirements and pictures that are
locked to whatever version of PQ/HDR10/HDR10+ they were mastered for
rather than allowing the display to make the best of what it's given;
<i>scene referred pictures</i>.</span></span></span></span></span></span></span></span></span></li>
<li><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g"><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g"><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody"><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody">The
good thing about HLG is that rec.2100 ratifies it, the DVB have too.
It's also trivial to upgrade HDR10-capable sets to support it (unlike
PQ). I imagine it'll be the case that broadcasters will deliver HDR
(for the reasons mentioned) and either you have to upgrade your TV (but
pretty much all the current ones support it out of the box) OR your STB
will do the conversion. </span></span></span></span></span></span></span></span></span></span></span></span></li>
</ol>
<span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g"><b><i><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody _1n4g"><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody"><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody"><span class=" UFICommentActorAndBody"><span data-ft="{"tn":"K"}"><span class="UFICommentBody"><del>Which is why the new 4k AppleTV is a damp-squib<del>...</del></del></span></span></span> </span></span></span> </span></span></span> </span></span></span></i></b> </span></span></span>Unknownnoreply@blogger.com2tag:blogger.com,1999:blog-5646974.post-33176178059258477862017-07-07T16:29:00.002+01:002017-07-07T16:29:53.917+01:00EDID will get you every time...<div style="text-align: justify;">
I
was helping to configure a new board room. This one is a tiny bit
different by having two nice big TVs mounted on the walls and the cable
run to each is at least 30m. So - HDMI does not reliably go that far
over copper cable (I know - somebody always has an example where they've
made it work, but this has to be reliable!). It's probably why so many
training/presentation rooms still have SVGA on the desk plate; it's
reliable.</div>
<div style="text-align: justify;">
The
other requirement was that with no operational changes you should be
able to plug an HDMI laptop into the desk plate and "...it just works"!</div>
<div style="text-align: justify;">
So - Barnfind are my favourite fibre parts and so a couple of <a href="https://www.barnfind.no/barnmini/barnmini-03/" target="_blank">BarnMini03</a> & <a href="https://www.barnfind.no/barnmini/barnmini-04/" target="_blank">04s</a>
with single-mode fibre between (spliced, of course!) takes the HDMI up
to 80km. I used these nice wall-termination panels from ADC Krone.</div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjpR7YQ6-wG54-l4Y93xitftpY1l-ZNZwlKaazc7T0lbC6fK-fyxjTlly1CEmkL2RLVPHHx7o_ehvYblN73-AxXtOZeNYaAkF7o10oPVDT50WgRUAerN3eK6fY4AKa9JyQanc9o/s1600/IMG_7753.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1600" data-original-width="1200" height="320" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjpR7YQ6-wG54-l4Y93xitftpY1l-ZNZwlKaazc7T0lbC6fK-fyxjTlly1CEmkL2RLVPHHx7o_ehvYblN73-AxXtOZeNYaAkF7o10oPVDT50WgRUAerN3eK6fY4AKa9JyQanc9o/s320/IMG_7753.jpg" width="240" /></a></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjibt1_8wTKkyU-H_jXyB6yESP65K8ImbeOqytE2W8BiqfHwmE3WLT8LhY79Q11yu6Ig4zORREon8Bh_pMzLrUNH4npp2wZ7K8oXQT-ku0SuvOzyJ4NR9pYl9UFpsCaLVZMq6YV/s1600/IMG_7754.jpg" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1200" data-original-width="1600" height="240" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjibt1_8wTKkyU-H_jXyB6yESP65K8ImbeOqytE2W8BiqfHwmE3WLT8LhY79Q11yu6Ig4zORREon8Bh_pMzLrUNH4npp2wZ7K8oXQT-ku0SuvOzyJ4NR9pYl9UFpsCaLVZMq6YV/s320/IMG_7754.jpg" width="320" /></a></div>
<br />
<div style="text-align: justify;">
I also bought one of those cheap no-name <a href="https://www.amazon.co.uk/s/ref=nb_sb_noss_2?url=search-alias%3Daps&field-keywords=hdmi+splitter" target="_blank">HDMI splitter/DAs from Amazon</a> as I've had no trouble with them in the past - they even <a href="http://philtechnicalblog.blogspot.co.uk/2016/10/hdmi-hdcp-and-sdi-out-from-bluray.html" target="_blank">work well as HDCP removers</a>.
However in this case as soon as I plugged in the second TV the system
would fall over with the "signal present" light on the DA going out - TV
A or B could be fed individually but not together. Sticking the EDID
analyser on the feed to the DA i/p showed the DA was generating and EDID
exchange ever second or so and alternating between the two different
EDIDs - first Mr. Sony then Mr. LG (different models of screens).</div>
<div style="text-align: justify;">
<br /></div>
<div style="text-align: justify;">
So,
after a bit of head-scratching I put one of these on the input of the
DA - it essentially answers EDID enquiries without forwarding them
upwards. Works like a charm;</div>
<div style="text-align: justify;">
<br /></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjimD0V6E3NS3pEpngM8OOe5w8jIMSjMJEkqbxH8QDjVjB3mqhdqhc9NF4J-2F0ayDY1gWDPeDL-cJEwqxtQkQfq8MfCWv8Cfulzadtgd9AuP96q_dRYB15k2coRWgerqePeSVc/s1600/Screen+Shot+2017-07-07+at+16.02.32.png" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="1046" data-original-width="1600" height="209" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjimD0V6E3NS3pEpngM8OOe5w8jIMSjMJEkqbxH8QDjVjB3mqhdqhc9NF4J-2F0ayDY1gWDPeDL-cJEwqxtQkQfq8MfCWv8Cfulzadtgd9AuP96q_dRYB15k2coRWgerqePeSVc/s320/Screen+Shot+2017-07-07+at+16.02.32.png" width="320" /></a></div>
<div style="text-align: justify;">
<br /></div>
<div style="text-align: justify;">
My
next test will be to see if the DA pulling the hotplug detect pin low
and triggering the erroneous EDID exchanges. For this I need to dig out
one of my famous Root6 Spoof'o'matics which we had manufactured in
quantity after a <a href="http://philtechnicalblog.blogspot.co.uk/2013/01/edid-isnt-only-thing-that-graphics.html" target="_blank">similar problem with Avid</a> and how it reacts to different monitors.</div>
Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-5646974.post-54949082408725025212017-06-24T23:13:00.000+01:002017-06-24T23:13:07.471+01:002nd RetroPi handheld build - the GamegearZeroRecently finished the second Raspberry Pi based handheld games console - this one based around a RasPi3 and a Sega Gamegear.<br />
<br />
<a href="https://youtu.be/Mt1VP-AjSQU">https://youtu.be/Mt1VP-AjSQU</a><br />
<br />
<br />
<iframe allowfullscreen="" frameborder="0" height="270" src="https://www.youtube.com/embed/Mt1VP-AjSQU?rel=0&showinfo=0" width="480"></iframe>
Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-5646974.post-89711968206868704002017-06-07T00:30:00.000+01:002017-06-07T13:31:14.555+01:00The insanity of trying to control encryption...<a href="https://www.theguardian.com/technology/2017/mar/27/amber-rudd-call-backdoor-access-hazy-grasp-encryption" target="_blank">Politicians and social commentators keep throwing up this idea</a> that encryption is;<br />
<ul>
<li>Bad (the bolt-hole for terrorists/paedophiles)</li>
<li>Somehow controllable (back doors, side doors) by the state.</li>
</ul>
<div style="text-align: justify;">
It's clear that people like <a href="https://en.wikipedia.org/wiki/Amber_Rudd" target="_blank">Amber Rudd</a> either have no idea (or more likely <i>choose to have no idea</i>) about the nature of data encryption. If you want a little primer I did <a href="http://philtechnicalblog.blogspot.co.uk/2016/03/tech-breakfast-encryption-soho.html" target="_blank">an intro around a year ago</a> and so thus armed you can explain the difference between symmetric and public-key crypto like a pro!</div>
<div style="text-align: justify;">
A few points are worth noting;</div>
<br />
<ol>
<li>Cryptography is maths - all of the algorithms currently in use are published and a decent proportion of computer-science or maths graduates could implement them in code. </li>
<li>WhatsApp and everyone else that offers end-to-end crypto probably rely on the underlying crypto-primitives provided by the OS - only a fool tries to re-invent the wheel (particularly WRT cryptographic functions)</li>
<li>If you could (and most crypto experts doubt it is achievable) devise a secure public-key algorithm with a back/side-door access how can we trust any public body to not let the private back-door key get out? Five years down the line we discover that some other nation-state has had access to all the private conversations? There is much precedent for this; remember last month's NHS attack was done with code written by and subsequently lost from the NSA. Examples of large governmental bodies loosing data they <i><b>really </b>didn't want to mislay</i> are legion. </li>
<li>Compromised encryption & identity algorithms will spell the end of eCommerce. No bank will want to expose themselves to that kind of risk.</li>
<li>How do you oblige software writers (who may be anywhere in the world) to use the crypto-crippled algorithm?</li>
<li>How do you oblige "bad guys" to use the crypto-crippled software?</li>
</ol>
<div style="text-align: justify;">
The outcome will be that only people who <b><i>aren't concerned</i></b> about security will use the crypto-crippled version of the popular chat/speech apps. Encryption exists outside of laws & countries and people who want privacy (for whatever reason) now have the means to achieve it. No nation state can now stop that.</div>
<div style="text-align: justify;">
<br /></div>
<div style="text-align: justify;">
WRT point 3 (above) I have heard non-technical people say something like "Silicon Valley is full of very clever people - they can figure it out. We were able to put a man on the moon fifty years ago..."</div>
<div style="text-align: justify;">
Well, putting a man on the Moon is one thing, putting a man on the Sun is entirely different - and that's what you're asking for, whether you <i>choose to believe</i> the people who actually understand cryptography or not.</div>
<br />
<br />
<br />Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-5646974.post-48198996400338395952017-06-06T11:54:00.002+01:002017-06-06T11:54:14.186+01:00The 18th Edition is almost upon us...It's been <a href="http://philtechnicalblog.blogspot.co.uk/2008/04/17th-edition-iee-wiring-regs-bs76712008.html" target="_blank">nearly a decade</a> since the 17th Edition came into force.<br />
<br />
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEihaMbC1YQJn_fY-_ZmjATs3wD25me1NLvNIwSkugl-yntS9LBEyYIor4ImLzgBaO4ZfP2FJHkFRkEUuG5-O5XGG7pQt34XC2YdRIY5fhUQtNzSBsbA7gmqnHAPwB9L6k1mvrzcbQ/s1600/Screen+Shot+2017-06-06+at+11.33.53.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" data-original-height="906" data-original-width="922" height="314" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEihaMbC1YQJn_fY-_ZmjATs3wD25me1NLvNIwSkugl-yntS9LBEyYIor4ImLzgBaO4ZfP2FJHkFRkEUuG5-O5XGG7pQt34XC2YdRIY5fhUQtNzSBsbA7gmqnHAPwB9L6k1mvrzcbQ/s320/Screen+Shot+2017-06-06+at+11.33.53.png" width="320" /></a></div>
<div style="text-align: justify;">
<br /></div>
<div style="text-align: justify;">
Currently at the committee-stage the 18th Edition will come into force at the end of 2018. The request for comments runs through until the end of August and is well worth <a href="https://standardsdevelopment.bsigroup.com/Projects/45ff73619910dcfa83208ba39773f4df" target="_blank">signing up to the BSI</a> to read the proposal and have a say if you see anything of note.</div>
<div style="text-align: justify;">
<br /></div>
<div style="text-align: justify;">
The most interesting change (for me) is section 8 - energy efficiency. All the changes to sections 4 onwards are better definitions and tighter specs for RCDs and earth leakage etc which are all very important but build on principles that are well established.</div>
<br />
I'll post more as I get familiar with the draft, but here is the intro <a href="http://electrical.theiet.org/wiring-matters/61/18th-edition-report/index.cfm" target="_blank">stolen from the IET site</a>;<br />
<br />
<blockquote class="tr_bq">
<b><i>New section - energy efficiency </i></b><br />
<br />
The worldwide need to reduce the consumption of energy means that we have to consider how electrical installations can provide the required level of service and safety for the lowest electrical consumption. The draft proposals enable a client to specify the level of energy efficiency measures applied to an electrical installation. Installations can also be awarded points for energy efficiency performance levels, for example, transformer efficiency. These points can be added together with points for efficiency measures to give an electrical installation an efficiency class, ranging from EIEC0 to EIEC4, depending on the number of points awarded.
The new section will cover several energy efficient areas, such as electric vehicles, lighting, metering, cable losses, transformer losses, power-factor correction, and harmonics.
</blockquote>
<br />Unknownnoreply@blogger.com0tag:blogger.com,1999:blog-5646974.post-54157209343074387902017-05-11T16:59:00.002+01:002017-05-11T16:59:45.665+01:00Sony VPL-VW320ES Projector colour profile <div style="text-align: justify;">
A recent trip to Edinburgh for my colleague at Root6 Scotland had me calibrating a new Sony SXRD-type 4k projector. Here is how it behaved from a colour profile point of view.</div>
<br />
<iframe width="480" height="270" src="https://www.youtube.com/embed/konWG0tjrvU?rel=0&showinfo=0" frameborder="0" allowfullscreen></iframe>
<br />Unknownnoreply@blogger.com0