Overlapped block motion compensation

Abstract

Systems, methods, and instrumentalities are disclosed for performing overlapped block motion compensation (OBMC). OBMC may be performed by considering sub-blocks within a coding block as an entire block if a motion field is uniform. OBMC may be performed on a coding block partitioned into multiple sub-blocks, using a block-based OBMC approach. The sub-blocks may be determined to have the same motion field, if the affine model associated with the block is translational. OBMC may be performed by subtracting OBMC from an original picture in the merge modes, using a block-based approach. A block coded in OBMC mode may be used in motion compensation, for example a fast merge pass of merge mode(s). The top band and the left band of the block may be subtracted from the input signal associated with the current block, and motion compensation may be performed on the block having the top and left bands subtracted.

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