Video Block Vector Matching for Efficient Intra Block Copy Coding

The patent performs preliminary reconstruction of samples within the current block before template matching. By reconstructing samples using already decoded neighboring blocks and previously processed portions of the current block, the method prepares reference data in advance that would traditionally be unavailable, enabling more accurate block vector prediction without adding significant computational overhead during the matching phase

The patent dynamically adjusts the template matching process by modifying cost functions to account for the partial reconstruction status of reference blocks. Instead of requiring fully reconstructed reference blocks, the system adapts the matching criteria to work with partially reconstructed samples, allowing flexible utilization of available data while maintaining prediction accuracy

The patent applies partial action by requiring only sufficient reconstruction of reference blocks rather than complete reconstruction. The template matching process is adapted to work with partially reconstructed reference blocks, using available samples and estimating or interpolating missing values, thereby achieving acceptable prediction accuracy without the full memory and processing costs of complete reconstruction

The patent treats unreconstructed or partially reconstructed sample data as usable temporary resources during the encoding process. Rather than requiring persistent storage of fully reconstructed reference blocks, the system leverages transiently available sample data from the current block's processing context, effectively using disposable computational resources to achieve prediction goals