• Jingning Han's avatar
    Contextual entropy coding of partition syntax · ff2b8aa2
    Jingning Han authored
    This commit enables selecting probability models for recursive block
    partition information syntax, depending on its above/left partition
    information, as well as the current block size. These conditional
    probability models are reasonably stationary and consistent across
    frames, hence the backward adaptive approach is used to maintain and
    update the contextual models.
    It achieves coding performance gains (on top of enabling rectangular
    block sizes):
    derf:   0.242%
    yt:     0.391%
    hd:     0.376%
    stdhd:  0.645%
    Change-Id: Ie513d9673337f0d27abd65fb566b711d0844ec2e