• Debargha Mukherjee's avatar
    Simplify warped motion estimation to use 2d ls · b9370acd
    Debargha Mukherjee authored
    Use a simpler warped motion estimation scheme that uses a 2d
    least squares problem, where the underlying assumption
    applied is that the motion vector computed at the center
    of the current block using the warp model is exactly the same
    as the motion vector transmitted for the block.
    
    The main motivation is to reduce the complexity of the
    estimation process.
    
    Coding efficiency drop is about +0.25% on lowres:
    -1.152% (from -1.396%).
    
    Also, removes code for non-approximate division and bakes
    approximate divison in.
    
    Change-Id: Ie4ad8e32593b09f7e1920c70b0b92545236ddc54
    b9370acd
warped_motion.c 65.7 KB