• Jingning Han's avatar
    Adaptive txfm size selection depending on residual sse/variance · 5a3e3c6d
    Jingning Han authored
    This commit enables an adaptive transform size selection method
    for speed -6. It uses largest transform size when the sse is more
    than 4 times of variance, i.e., most energy is compacted in the
    DC coefficient. Otherwise, use the default TX_8X8. It improves
    the compression efficiency for rtc set of speed -6 by 0.8%, no
    speed change observed.
    Change-Id: Ie6ed1e728ff7bf88ebe940a60811361cdd19969c
vp9_speed_features.c 14.1 KB