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23rd February 2012, 16:31 | #81 | Link | |
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23rd February 2012, 16:41 | #82 | Link | |
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In fact, with higher internal precision (bit-depth) you can achieve a higher compression efficiency and thus might be able to get away with a lower bit-rate for the same level of quality. Even for 8-Bit sources. Using "only" 8-Bit internal precision primarily is a speed hack. If at all, the speed may be the problem, why they not use a higher bit-depth by default. But if they make a new format, we will need new h/w decoders anyway. So they might choose a higher bit-depth right from the start
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23rd February 2012, 18:53 | #83 | Link |
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HEVC will have a higher internal bit depth http://www.h265.net/2010/11/analysis...-overview.html
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23rd February 2012, 19:04 | #84 | Link |
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I've added 10 bit screenshot for comparison
http://forum.doom9.org/showthread.ph...04#post1560604 8bit + deband filter looks like 10bit for me
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Windows 7 Image Updater - SkyLake\KabyLake\CoffeLake\Ryzen Threadripper Last edited by Atak_Snajpera; 23rd February 2012 at 19:34. |
7th March 2012, 15:22 | #85 | Link |
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Oh, so many people concern HEVC.
My project THEVC is a simple(or call baseline) software model, I drop many of features, it is let us easy to read. The x265 is opensource and powerful implement. I am looking for a new job since last year, so I am have a little time, but I am still working on it. I hope that I can release a IDR only version before Apr 2012, then I will doing a new plan, use GPU speedup or working on P-Slice? In my plan for the IDR only version, the LCU 64x64, Transform 32x32, IntraPred, Cabac implement in the first version, and QuadTree split, SAO implement late, the deblock and ALF maybe drop in this year, because them have lower compress performance. btw: The project status I will update on x265 project homepage every month. Any ideas can send to my email at 163.com. Last edited by chenm001; 7th March 2012 at 15:28. |
8th March 2012, 19:59 | #87 | Link |
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From what I can gather, hardware vendor specific APIs like DXVA and CUVID are too limited, and rewriting x264 to use things like OpenCL is too difficult/time consuming/not worth the payoff. One thing that I can say for sure though is that there's no real technical limitation. Time is the real issue.
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9th March 2012, 07:37 | #88 | Link | |
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There is not technical difficulty, the only one is time. The codec architecture must suit to GPU, but we need many time to experiment. |
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8th July 2012, 23:52 | #96 | Link | |
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HEVC/H.265 vs H.264 preliminary subjective test results publicly available
http://multimediacommunication.blogs...h-meeting.html
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9th July 2012, 07:04 | #97 | Link | |
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Best regards Dust Signs
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10th July 2012, 00:55 | #98 | Link |
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In the latest issue of c't magazine somebody complained that the "Main" profile of HEVC won't support higher bit-depths than 8-Bit.
They replied that the SAO (Sample Adaptive Offset) feature will practically eliminate banding, even at 8-Bit. I wonder if this really holds up in reality
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10th July 2012, 05:28 | #99 | Link | |
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10th July 2012, 20:34 | #100 | Link |
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Yup, but the first official specification of HEVC will be "Main" profile only. More profiles are to be added at a later time. We'll see which profile is going to be commonly supported...
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