Marco 04a99cb36b Bias against non-zero mv for large blocks.
Change is only for real-time mode, speed > 5, and non-screen content mode.
Bias is based on block size and motion vector level (motion above some threshold).

Helps to improves stability in background from lightning changes.
PSNR/SSIM metrics on RTC set almost no change/neutral (within +/- 0.1).

Change-Id: I7eac13c1ae10be4ab1f40acc7f9f1df5653ece9d
2015-11-03 14:51:56 -08:00
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