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7th November 2016, 19:49 | #101 | Link | ||
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all my compares are riddles so please try to decipher them yourselves :) It is about Time Join the Revolution NOW before it is to Late ! http://forum.doom9.org/showthread.php?t=168004 Last edited by CruNcher; 7th November 2016 at 20:12. |
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13th November 2016, 19:43 | #102 | Link | |
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https://www.sendspace.com/filegroup/...FiztpTDNDeyMc9 Last edited by Jamaika; 13th November 2016 at 19:46. |
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16th November 2016, 16:22 | #103 | Link | |
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The results on low bitrate VP9 from Netlfix were very interesting. Shows the power of automated testing of quality. Interesting to see what comes of that work. And good that they're offering to do the same with AV1 as part of the development process. |
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20th November 2016, 16:17 | #104 | Link |
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A codec is not the place to lobby for your politics in format choices. If someone can't compress the image they have, then they are going to use another codec.
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LAV Filters - open source ffmpeg based media splitter and decoders |
20th November 2016, 16:28 | #105 | Link |
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If they want to use such formats, the codecs exist that can handle all of it. So convince the content providers, its a political debate, not a technical one, and you can't force it on a technical level.
If there is enough demand, then hardware implementations of AV1 will also adopt support for higher chroma. Everything is a matter of demand. If content exists, hardware will come (or content is at least widely planned to roll out). That just wastes space and/or degrades quality. An image should be compressed as close to the raw material one has - and if thats 4:2:0 or 4:2:2, which a lot of content is, then don't artifically upscale chroma, just because someone is on a crusade. Cheap upscaling is almost as bad as downscaling in the first place.
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LAV Filters - open source ffmpeg based media splitter and decoders |
20th November 2016, 17:56 | #108 | Link | |
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"you can get to big numbers."
which is not possible with limited range. edit: Quote:
full range YCgCo should be fine https://en.wikipedia.org/wiki/YCgCo Last edited by huhn; 20th November 2016 at 18:01. |
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20th November 2016, 19:00 | #109 | Link | |
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Last edited by mzso; 20th November 2016 at 19:05. |
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21st November 2016, 10:38 | #112 | Link |
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http://aomedia.org/about-us/
http://www.bbc.co.uk/rd/blog/2016/10...eo-compression More and more companies join the Alliance for Open Media. |
21st November 2016, 11:52 | #113 | Link | |
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On top of that this allows you to compress chroma more then luma, which plays into the nature of our eyes. With pure RGB you couldn't do that - the best you could do is compress one color channel more then the others, but thats not even close to as efficient. YCbCr (or YUV in other terms) is what we have to do that. Some other approaches have been brought forward, like YCgCo, but they have not been adopted widely because many existing processing pipelines just know how to work with YCbCr, and the advantages of those suggested alternatives were not that great. If someone can define a groundbreaking new scheme to split Luma and Chroma in a more efficient way (say a significant difference), reducing even more redundant information while being able to (visually) losslessly re-create the original image, I'm sure there would be industry interest eventually. But so far all the needs we had to modify YCbCr could be done with different transfer matrices to increase the colorspace.
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LAV Filters - open source ffmpeg based media splitter and decoders |
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21st November 2016, 13:01 | #114 | Link | |
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So their input for HFR might be really useful. |
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21st November 2016, 14:27 | #115 | Link |
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Not only that think about Dirac VC2 Open Broadcast
And they're still standing a lot more on the doorstep waiting to get in
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all my compares are riddles so please try to decipher them yourselves :) It is about Time Join the Revolution NOW before it is to Late ! http://forum.doom9.org/showthread.php?t=168004 Last edited by CruNcher; 21st November 2016 at 14:53. |
21st November 2016, 21:25 | #116 | Link | |
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http://informationdisplay.org/IDArch...asNextGen.aspx
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powered by Google Translator Last edited by Motenai Yoda; 21st November 2016 at 21:33. |
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21st November 2016, 22:05 | #117 | Link | |
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According to "The Application of Sampling Theory to Television Frame Rate Requirements" the hard limit is at ~700fps. But that might not take into account BFI trickery. I'd be interested to know if anyone did research which includes interpolation algorithms. It might be that something like 100 interpolated to 300 + BFI would totally fool human perception and would appear completely realistic. |
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22nd November 2016, 18:59 | #118 | Link | ||
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Interesting you would need to look into the FRC SOA
This part is really interesting for HVS tuning and reducing the bandwith requirements efficiently Quote:
We have some really interesting things going on like Asynchrounous Space Warping for VR And i think VR is the future for this Research to be improved significantly https://www.youtube.com/watch?v=xpQQmu7vquE Quote:
And surely we also have to rethink about efficiency costs and energy consumption. But if i think about HFR in total i get big headaches of the Discussion in certain areas like Cinema especially with a decade old Hollywood trained LFR crowed And im pretty sure there isn't even yet a HFR Production existing from Hollywood that would adhere to Scientific grounds and rethink how todo it from Ground up right and different in the whole production chain, it will still take years before that will work out at all.
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all my compares are riddles so please try to decipher them yourselves :) It is about Time Join the Revolution NOW before it is to Late ! http://forum.doom9.org/showthread.php?t=168004 Last edited by CruNcher; 22nd November 2016 at 20:41. |
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9th December 2016, 13:13 | #120 | Link |
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I found this comparison betwen beta of AV1, HEVC and AVC by the Fraunhofer Heinrich Hertz Institute:
http://iphome.hhi.de/marpe/download/...VC-PCS2016.pdf The result is somewat surprising but not much if we think who did it and the development status of AV1, after reading it I also find it of poor quality and with various possibilities for errors plus it's potentially in conflict with other studies. Last edited by Phanton_13; 9th December 2016 at 13:16. |
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