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Old 1st December 2017, 18:46   #368  |  Link
benwaggoner
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Join Date: Jan 2006
Location: Portland, OR
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Quote:
Originally Posted by bstrobl View Post
Hopefully the AV1 update by Jai Krishna will be uploaded soon. For those who are impatient, the slides are here: https://speakerdeck.com/stswe/av1-up...an-from-google
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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