Motion Vector Difference Segmentation for Parallel Image Decoding

The motion vector difference coding is segmented into four distinct portions: sign bits, magnitude高位, magnitude低位, and overflow flags. Each portion is coded independently and can be decoded in parallel, eliminating the sequential processing bottleneck in conventional methods.

The patent introduces a new dimension to the coding structure by organizing motion vector difference data into multiple independent portions that can be processed simultaneously. This dimensional reorganization transforms the single-stream sequential processing into multi-stream parallel processing, significantly improving decoding speed.

The motion vector difference is divided into four portions, each handled by dedicated coding logic. This segmentation maintains precise representation of the motion vector difference while distributing the coding complexity across multiple simple, specialized modules rather than one complex sequential processor.

The patent changes the parameter representation by using separate sign bits, magnitude portions, and overflow flags instead of a single unified motion vector difference value. This parameter transformation enables more efficient parallel processing while preserving the complete information needed for accurate decoding.

By segmenting the motion vector difference into four independently coded portions, the patent enables parallel decoding operations that dramatically increase processing speed. The increased structural complexity is offset by the performance gains from parallel execution of multiple simple coding paths.

The patent merges multiple coding operations into a unified parallel processing framework where four different portions are coded simultaneously using similar logic structures, reducing overall processing time while maintaining manageable complexity through code reuse and modular design.