tree 3d76ce8595486f161e4c583c5619f5b03c473762
parent 67c37914286ace423a9de7fbd9f6272871061db3
author Cheng Chen <chengchen@google.com> 1653608300 -0700
committer Cheng Chen <chengchen@google.com> 1654804788 +0000

RT: Pick cdef filter strengths based on q for screen content

Train a new model to predict cdef filter strengths for screen
content based on the frame q.

Add a qindex threshold in the speed feature to achieve a better
tradeoff for different speed settings.

Performance:
speed_10    ovr_psnr    avg_psnr    ssim      vmaf
rtc_screen   -3.485%     -1.362%    -4.240%   3.724%

The average slowdown is 2.4%.

For speed 9, a lower threshold is used to retain higher coding gain.

Change-Id: Icf0690429e0739b9c72be90630cb6f4cdb7a670c