Decoder-Side Motion Vector Refinement With Early Search Termination

The patent applies partial action by implementing early termination conditions in the DMVR process. Instead of performing the complete refinement search for all blocks, the algorithm terminates the search early when certain conditions are met (such as when the motion vector difference becomes sufficiently small or when a maximum iteration count is reached). This partial execution of the refinement process reduces processing complexity while maintaining the primary benefit of improved compression efficiency for blocks that require refinement.

The patent changes the parameter of motion vector precision through the DMVR process. By refining motion vectors to sub-pixel accuracy and applying iterative optimization, the system achieves better prediction accuracy for high-resolution video. This parameter change in motion vector precision enables more efficient compression of high-quality video, reducing the bitrate required to maintain a given image quality level, thereby lowering transmission and storage costs.

The patent implements feedback mechanisms through iterative refinement loops in the DMVR process. The algorithm continuously evaluates the motion vector refinement quality against termination conditions (such as motion vector difference thresholds or cost function improvements). This feedback loop allows the system to adaptively determine when sufficient refinement has been achieved, balancing processing complexity and refinement accuracy by terminating early only when quality requirements are met.