Yunqing Wang 81fc5bf81c Improve skip_txfm thresholds in the non-rd mode selection ...

Modified the thresholds of deciding whether or not to skip
the transforms in model_rd_for_sb_y(). Used zbin[] instead
of dequant[] to be more precise. Also, modified the checking
coditions.

Rtc set borg test results (at speed 6) showed:
average PSNR gain: 0.138%, overall PSNR gain: 0.158%,
and SSIM gain: 0.177%.

The data rate test was modified slightly as suggested by
Marco.

Change-Id: Ieaf633ab77f4838cb3c45cf69065b29d55f8ae6c

2015-02-19 14:30:46 -08:00

27 KiB

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