tree 397beb2eed04de00909dce02ebaec65d1d501b03
parent abdd78472df54c3ccd1918cc6cf7cff40ecbf396
author Paul Wilkins <paulwilkins@google.com> 1669037445 +0000
committer Paul Wilkins <paulwilkins@google.com> 1672929300 +0000

Cyclic refresh changes

Treat inter scene changes more like key frames in
av1_cyclic_refresh_update_parameters()

This gives large metrics gains for the screen test set and
also a modest encoder speedup. Other sets should be
unchanged. Results below are for speed 10.

Overall PSNR, SSIM (-4.142, -3.974), Encoder Speedup 0.801%

The patch includes a further change that helps reduce
the size of rate spikes after scene changes by reducing
the rate_ratio_qdelta gradually with increasing distance
from the last scene change or key frame and suppressing it
further if either of the past two frames overshot.

STATS_CHANGED

Change-Id: I654f55ddac2428b70cfa8a62853b15e45d9a2a07