tree 1a27434f11b5cbf0ced80612a6e139cf84e22fc4
parent 69263c19c710e5cc73c996d3e3e623f6b783261d
author yjshen <yjshen@google.com> 1580427513 -0800
committer Damon Shen <yjshen@google.com> 1581356729 +0000

Free temporal filter strategy from screen content.

Temporal filtering strategy should be free from screen content type. It
still need to explore whether temporal filtering should be turned off if
`allow_screen_content_tools` is true.

NOTE: This CL only affects partial clips from midres and hdres sets.
Some clips show significant gain while some show severe drop. Even so,
the filtering strategy still shouldn't be conditioned on screen content.
In other words, screen content should affect whether to do filtering but
not which filtering method to use.

Experimental results:

Under Speed-4 (two-pass mode):
                                        avg PSNR   ovr PSNR     SSIM
snow_mnt_480p.y4m (midres)                -0.424     -0.515    0.499
Mobisode2_832x480_30.y4m (midres)         -0.719     -1.091   -1.053
sintel_shot_854x480_24fps.y4m (midres)     0.787      0.473    0.216
dinner_1080p30.y4m (hdres)                 0.889      0.775    0.382

Under Speed-1 (two-pass mode):
                                        avg PSNR   ovr PSNR     SSIM
snow_mnt_480p.y4m (midres)                -0.618     -0.641   -0.059
Mobisode2_832x480_30.y4m (midres)         -0.687     -1.108   -1.489
sintel_shot_854x480_24fps.y4m (midres)     0.902      0.597    0.354
dinner_1080p30.y4m (hdres)                 1.900      1.179    0.546

STATS_CHANGED

Change-Id: I383831adf5e1517e6db78eacd30f94425065ddcf