tree 51007a754cfa370e1691e92dad6f3981667285f0
parent aeb5b91e3cce2a8df5019e17b1e7f9249833550e
author Marco Paniconi <marpan@google.com> 1681284580 -0700
committer Marco Paniconi <marpan@google.com> 1681396992 +0000

rtc: Layer constraint on Q for temporal layers

For temporal layers CBR: constrain how much lower
the Q for an enhancement layer can go relative
to avg Q of base TL0.

This reduces visual quality flicker for
temporal layers.

Gains for 2 TL speed 10, 70/30 split, rtc_derf:
avg/ovr/ssim, IC speeedup
-0.48/-0.46/-0.48, 0.13

Several clips ~1% bdrate gain.

Change-Id: I0c91dfdbd07abd0c3e0a2e36652615109fbccff0