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15th April 2019, 16:15 | #61 | Link | ||
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and the problem with tonemapping in general is you are going to miss the creators intend. the problem started with the need of meta data and nit number far from any sanity. even if we could create 10k nit screen putting them into every home is a very very bad idea... just inform your self what a 1000 watt water cooker can do to the energy grid now add a TV show to that will show an image where the TV needs 1000 watt for about 5-10 sec. taking into account that the dolby vision screen is water cooled i'm very generous here and no there is a limited to power efficiency we are not going to make pure energy like light to use less energy. i have no problem with PQ and using a bigger colorspace both make sense. Quote:
http://madshi.net/madVR/ChromaRes.png |
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15th April 2019, 21:01 | #62 | Link |
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@huhn - you're absolutely right - Dolby Vision on UHD BluRay is quite different. I only care about Dolby Vision Profile 5 (non backwards compatible) since it's what's being used for VOD streaming these days, so my comments only apply to that flavor
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16th April 2019, 12:20 | #63 | Link | ||||||
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Personally, I don't like this "excuse" (I already wrote about it a bit on avsforum): looking only at HDR10 (not DV and neither HDR10+), every display manufacturer does whatever they want to do, they even change their own approach in every new series of models, nothing is stone carved, mainly due to the above hardware limitations.
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16th April 2019, 12:27 | #64 | Link |
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No its not, but for example UHD Blu-rays that use wide color and not HDR are actually relatively rare.
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LAV Filters - open source ffmpeg based media splitter and decoders |
16th April 2019, 16:52 | #66 | Link |
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There really are not many limitations. HDR is fully optional.
From the Blu-ray whitepaper: The only real limitation is that HEVC has to be 10-bit (8 is not allowed), and that BT.2020 has to use the new chroma sample location, while BT.709 uses the old one.
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LAV Filters - open source ffmpeg based media splitter and decoders |
16th April 2019, 17:09 | #67 | Link | |
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thanks the wiki is not well updated: https://en.wikipedia.org/wiki/Blu-ray#Video
and the UBD wiki doesn't have a video part at all. is there a read about the chroma sub sample position? that doesn't help me: Quote:
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16th April 2019, 18:39 | #68 | Link |
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Conceptually the Chroma stuff is not that complicated.
The image is a bit poor, but it shows it anyhow: The black dots are Luma, and the Red one is the Chroma sampling location, plus the square to indicate the "area" the subsampled chroma sample covers. Typical 4:2:0 is type 0, "old" mpeg1 is type 1, and UHD now uses Type 2. I don't know of a good simple article that explains the advantages between them really. Using the TopLeft location may be simpler to interpolate, or something.
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LAV Filters - open source ffmpeg based media splitter and decoders |
16th April 2019, 19:09 | #69 | Link |
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thanks i know about mpeg1 and mpeg2 chroma subsample position i used this for illustration in the past: http://www.mir.com/DMG/chroma.html
so pretty much the same as SMPTE DV-PAL without interlancing. only one last thing to ask about this do lav filter and madVR honour this and are able to handle this correctly? |
16th April 2019, 19:13 | #70 | Link |
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LAV will send that info to madVR, anything else is at least out of my hands.
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LAV Filters - open source ffmpeg based media splitter and decoders |
29th April 2019, 13:31 | #72 | Link | |
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Technologies co-evolve. If we didn't increase the number of electronics, we wouldn't have built a bigger grid, if we didn't build a bigger grid, we wouldn't use ever more electronics. It's not as if Overnight, everyone will be running Kilowatt Tvs. They're a great idea, how will we engineer, to make that happen. Solar/Wind/Nook
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29th April 2019, 15:03 | #73 | Link | ||
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and yes the power grid is just increased so people can run use TV that use 10 times the power not for more people. |
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12th December 2020, 00:45 | #74 | Link |
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For a desktop form factor display models using the 1500:1 CR Panasonic IPS panel https://linustechtips.com/topic/9815...ast-ips-panel/
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