Intra Block Copy Mode Selection for Video Coding Efficiency

The patent segments the video block into multiple sub-blocks and applies different prediction modes to different segments. The IBC mode divides the current block into multiple prediction units, each requiring different block vectors, allowing optimized prediction for each segment while maintaining overall coding efficiency.

The patent implements a universal IBC mode that can handle multiple prediction scenarios through a single flexible mechanism. The mode supports various block vector configurations and prediction unit arrangements, making it applicable to different video content types and block sizes without requiring separate specialized modes for each case.

The patent performs preliminary actions by pre-calculating and storing block vectors for different prediction units before the actual prediction process. The block vectors are derived in advance based on the partition configuration, allowing the prediction units to be processed efficiently without complex real-time calculations during encoding/decoding.

The patent introduces block vectors as intermediary elements that mediate between the partition configuration and the prediction process. These block vectors serve as intermediaries that carry the necessary prediction information, simplifying the overall mode operation by separating the configuration phase from the prediction execution phase.