Video Block Partition Signaling for Adaptive Compression

The patent segments the partitioning schemes into different categories (quadtree, binary tree, ternary tree) and uses a hierarchical signaling structure where a first syntax element indicates the type of partitioning scheme and a second syntax element provides additional details. This segmentation allows the system to support multiple partitioning methods while organizing the complexity in a manageable hierarchy, resolving the contradiction between supporting diverse schemes and maintaining bitstream simplicity.

The patent implements dynamic signaling where the syntax elements are conditionally signaled based on block characteristics and neighboring blocks. The signaling structure adapts to different video content and block types, using only the necessary syntax elements for each specific partitioning case. This dynamic approach reduces the effective complexity in the bitstream while maintaining support for multiple partitioning schemes, as not all syntax elements are always present or required.

The patent applies different partitioning schemes selectively based on local block characteristics and neighboring block information. Rather than using a uniform partitioning approach, the system adapts the partitioning strategy to each specific location and content type, optimizing compression for regions where it benefits most while preserving reconstruction quality in regions where it is most important. This local adaptation allows the system to balance bandwidth efficiency with reconstruction fidelity.

The patent changes partitioning parameters (such as split direction, split ratio, and tree type) based on analyzed block characteristics. By adjusting these parameters dynamically according to the specific video content and block properties, the system optimizes the balance between compression efficiency and reconstruction quality. The parameter changes are guided by syntax elements that encode the optimal partitioning decisions, allowing the decoder to reconstruct the image with high fidelity while achieving good compression.

The patent performs preliminary analysis of block characteristics and neighboring blocks before determining which syntax elements to signal. This preliminary action allows the encoder to make informed decisions about which partitioning scheme to use and which syntax elements are necessary, avoiding the need to signal all possible elements. The preliminary analysis is performed in a structured manner that guides the subsequent syntax element selection, making the conditional signaling predictable and manageable for the decoder.

The patent uses feedback from block characteristic analysis and neighboring block information to guide the syntax element signaling. The system continuously refines its decisions about which elements to include based on the actual video content and block properties. This feedback mechanism ensures that the syntax elements signaled are both sufficient for accurate decoding and minimal for efficient compression, balancing bitstream size with parsing simplicity.