• Yushin Cho's avatar
    Remove PVQ_CHROMA_RD codes · 5c207296
    Yushin Cho authored
    Which was a workaround to balance the quality between
    luma and chroma when PVQ is enabled, by
    1) skipping PVQ DC RDO for chroma and
    2) using smaller lambda value (x0.5) for intra prediction of chroma,
    intended to spend more bits and thus improve quality for chroma.
    
    The change in metric for 5 frames of objective-1-fast is:
    PSNR  PSNR-HVS  SSIM  CIEDE-2000  PSNR Cb PSNR Cr  MS-SSIM
    -1.45 -1.54     -1.46 4.62        13.71   14.87     -1.47
    
    For still images (subset1)
    PSNR  PSNR-HVS  SSIM  CIEDE-2000  PSNR Cb PSNR Cr  MS-SSIM VMAF
    -1.52 -1.54     -1.60 2.56        11.92   12.17     -1.52  -1.66
    
    Change-Id: I31c4d7a7de2939f6004c112649f7303f0e944156
    5c207296
rdopt.c 452 KB