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Old 4th October 2019, 19:41   #64  |  Link
Boulder
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Join Date: Mar 2002
Location: Finland
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Quote:
Originally Posted by benwaggoner View Post
After some rumination, I'm not sure that HME doesn't have psychovisual impact after all. I think there could be cases where it could improve handling of random noise that would have gotten low-pass filtered at the lower resolutions, allowing the encoder to spend more bits on signal than noise.

PSNR would be terrible for measuring this. Not sure about SSIM. Looking at divergence between PSNR and SSIM, or PSNR and VMAF, perhaps could be helpful?
At least it seems to cause changes in frametype decision. I didn't verify them to be exactly sure, but it looked like my frame-by-frame comparison had often P-frames compared against B and vice versa.
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