• Jingning Han's avatar
    Enable variable block size test in non-RD mode decision · 60f9ebc3
    Jingning Han authored
    This is an initial attempt to allow variable block size partition
    in non-RD coding flow. It tests 8x8, 16x16 and 32x32 block size per
    64x64 block, all using non-RD mode decision and the associated rate
    distortion costs from modeling, then selects the best block size to
    encode the entire 64x64 block. Such operations are triggered every
    other 3 frames. The blocks of intermediate frames will reuse the
    collocated block's partition type.
    It improves the compression performance by 13.2%. Note that the gains
    are not evenly distributed. For many hard clips, the compression
    performance is improved by 20% to 28%. Local speed test shows that
    it will also increase runtime by 50%, as compared to speed -7. It is
    now enabled in speed -6 setting.
    Change-Id: Ib4fb8659d21621c9075b3c369ddaa9ecb0a4b204