Intra Block Copy Fractional Motion With Selective Padding

The patent applies partial action by selectively performing the padding process only under specific conditions rather than always. The decoder determines whether to perform padding based on criteria such as block size, motion vector precision requirements, and reference block availability. This selective approach maintains prediction accuracy when needed while avoiding unnecessary computational overhead in cases where padding would not provide significant benefit.

The patent utilizes parameter changes by dynamically adjusting the precision of motion representation based on content characteristics. Fractional motion information is obtained and processed with appropriate precision levels - using full fractional precision when motion complexity requires it, and potentially using reduced precision or integer-only representation when content characteristics allow. This adaptive parameter adjustment maintains motion prediction precision for complex regions while reducing processing time for simpler regions.

The patent applies partial action by implementing the padding process selectively rather than universally. The decoder evaluates specific conditions - such as block size thresholds, motion vector precision requirements, and reference block characteristics - to determine when padding should be performed. This conditional approach ensures decoding accuracy is maintained for blocks where padding provides benefit, while avoiding unnecessary memory access and processing overhead for blocks where padding would not significantly improve results.