Quote:
Originally Posted by Marsu42
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Indeed. Although their assertion that VP9 is
40% better than H.264 and
equivalent to HEVC is flat-out wrong for every scenario I've tested. Maybe PSNR at fixed QP or something, but certainly not in subjective MOS testing of subjectively-tuned encodes.
There's no doubt that, with a good Film Grain Synthesis implementation, AV1 can outperform HEVC for grainy content at lower bitrates. But that's really the only case where I've seen a reliable reduction in bitrate versus HEVC when compared at the same bitrate and encoding time. And the FGS implementations aren't quite to the point where they can be used automatically, but that's orthogonal to codec bitstream itself, and I believe will be continuously improved.
Of course, the FGS being orthogonal, decoders which support it with AV1 could easily support FGS for HEVC and VVC too. I quite like the AV1 FGS implementation, and is probably technology that will be reused in other contexts. It's certainly much better than the H.264 FGS model that was available with HD-DVD players (although never used in any actual discs AFAIK).