Video Block OBMC Inheritance for Higher Coding Efficiency

The patent applies OBMC selectively to specific subblocks based on motion vector differences and prediction modes rather than uniformly across the entire block. This local quality approach enables the encoder to apply OBMC only where it provides coding gain, thereby improving coding efficiency while limiting the increase in computational complexity to only the necessary regions.

The patent implements partial OBMC by applying the technique to only certain subblocks within a larger block based on specific conditions (motion vector differences, prediction modes). This partial action approach avoids the excessive computational burden of applying OBMC to the entire block while still capturing the coding gains in the regions where motion discontinuities exist.

The patent employs a feedback mechanism where the encoder evaluates whether to inherit OBMC parameters from neighbor blocks or signal new parameters based on the actual video content characteristics. This feedback approach allows the system to adaptively decide when parameter inheritance is sufficient and when fresh parameter signaling is necessary to maintain prediction accuracy, thereby balancing signaling overhead against prediction quality.

The patent utilizes parameter copying by inheriting OBMC parameters from spatially or temporally adjacent blocks when appropriate. This copying mechanism significantly reduces signaling overhead by reusing parameters from neighboring blocks rather than encoding them anew, while the selective application based on motion and prediction mode analysis ensures that accuracy is maintained where it matters most.