Quote:
Originally Posted by benwaggoner
It makes me somewhat nervous that the percentage gains go down the more subjectively correlated the metric used is.
-26.51% for VOD PSNR-Y but only -23.57% for MS-SSIM. And no metrics that include any temporal component. I'd love to see at least VMAF scores, which is the metric most predictive of DMOS that we have today.
The VPx series was always heavily tuned to optimize for PSNR, so its theoretical PSNR always overstated the series' actual perceptual quality. At least since VP6, which had a lot of advanced postprocessing technology that did a good job of hiding artifacts in a lot of ways.
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I suppose the good news here is that AV1 has had no form of optimisation beyond the basic stuff done to it yet. Might be able to squeeze out a couple percent more with improved encoders. Right now encoding time is the biggest problem, especially for RTC.