tree 7294692219d854807609a7c9fb95a174051902e6
parent 57bba2396d23fe34818e0c70bdce67a53b7497e1
author Jingning Han <jingning@google.com> 1570057539 -0700
committer Jingning Han <jingning@google.com> 1570306607 +0000

Introduce rate propagation factor

Support a rate cost propagation pipeline to estimate the associated
rate cost due to quantization noise. The new tpl propagation kernel
improves the compression efficiency. In the settings of speed 1, VBR
mode, and 150 frames, the coding gains are:

        avg PSNR   ovr PSNR  SSIM
lowres  -0.02%      0.04%    -0.60%
midres  -0.49%     -0.39%    -1.60%
ugc360  -0.23%     -0.08%    -1.07%
hdres   -0.31%     -0.27%    -1.36%

STATS_CHANGED

Change-Id: I4c08474adfe98f2bf6dc3372ff17089a0d74c206