tree d67d9954e076b467700418bed77b026c2fc7df99
parent 5115747345e7de18fdbafc333e078604f39ba932
author Ranjit Kumar Tulabandu <ranjit.tulabandu@ittiam.com> 1673412189 +0530
committer Yunqing Wang <yunqingwang@google.com> 1674152154 +0000

Speed-up weight calculation during temporal filtering

In parent version, the weights used during temporal
filtering were calculated using exp() function. In this CL,
exp() is replaced by approx_exp().

For 'good' encoding,
               Instruction Count      BD-Rate Loss(%)
cpu Resolution   Reduction(%)    avg.psnr  ovr.psnr    ssim
 5     LOWRES2      3.190         0.0171    -0.0000  -0.0147
 5     MIDRES2      4.240         0.0463     0.0181   0.0438
 5      HDRES2      5.180         0.0697     0.0537   0.0875
 6     LOWRES2      1.812         0.0216     0.0070  -0.0269
 6     MIDRES2      3.849         0.0256    -0.0472  -0.0362
 6      HDRES2      4.654        -0.0597    -0.0750  -0.0581

STATS_CHANGED for speed=5,6

Change-Id: I6b1b7086b834f230efa37002ef7c3e3ba3624aa9