tree 696f7f9affc1718c4de0568a101f88a11ecedd99
parent b51e6ee5a28bd603f5c310e1f9b6282faf9e4345
author Diksha Singh <diksha.singh@ittiam.com> 1674649893 +0530
committer Yunqing Wang <yunqingwang@google.com> 1675296379 +0000

Speed-up weight calculation during highbd temporal filtering

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

                 Instruction Count        BD-Rate Loss(%)
cpu    Testset     Reduction(%)      avg.psnr  ovr.psnr  ssim
 5     LOWRES2       2.273           0.0175    0.0476    0.0476
 5     MIDRES2       2.802           0.0673    0.0309    0.0309
 5      HDRES2       3.333           0.0116   -0.0029   -0.0029
 6     LOWRES2       1.218           0.0246    0.0398    0.0398
 6     MIDRES2       2.438           0.0379    0.0366    0.0366
 6      HDRES2       2.853           0.0406    0.0114    0.0114

STATS_CHANGED for highbd,speed=5,6

Change-Id: I3b68a8687697fbd6af634a21cf8a45be6cf94973