DMVR Control for Reference Picture Resampling in Video Decoding

The patent applies local quality by enabling DMVR selectively only for specific block types (intra-block copy blocks and inter-blocks with specific motion vector differences) rather than uniformly for all blocks. This localized application of the refinement process ensures that computational resources are concentrated where they provide the most benefit, avoiding unnecessary processing for blocks where DMVR would not improve accuracy.

The patent implements partial action by applying DMVR to only a subset of blocks that meet specific criteria (block type and motion vector difference thresholds) rather than performing the operation on all blocks. This partial application strategy achieves sufficient motion vector refinement for critical blocks while avoiding the excessive resource consumption that would result from universal application.

The patent applies local quality by making DMVR application block-specific rather than picture-resolution-dependent. Each block is evaluated individually based on its type and motion characteristics, allowing DMVR to be enabled for specific blocks even when the overall picture resolution differs from reference pictures. This selective approach maintains coding efficiency for critical blocks while avoiding universal disabling.

The patent implements dynamics by making the DMVR enablement decision adaptive to each block's specific characteristics (block type, motion vector difference) rather than using a static decision based solely on picture resolution. This dynamic, context-dependent approach allows the system to optimize coding efficiency on a per-block basis while managing overall resource consumption.

The patent applies parameter changes by using simple, easily obtainable block attributes (block type classification and motion vector difference values) as decision criteria for enabling DMVR. These parameters are naturally available during the decoding process and require minimal additional computation to evaluate, allowing selective DMVR enablement without significantly increasing device complexity.

The patent applies local quality by implementing straightforward decision logic at each block level that checks basic block properties and motion characteristics. This localized decision-making process uses simple conditional checks rather than complex global analysis, enabling improved coding efficiency through selective DMVR while keeping the added complexity minimal and localized to individual block processing.