Picture Block Partitioning With Multi-Tree Split Flag Decoding

The partitioning structure is divided into multiple independent tree types (quadtree, binary tree, ternary tree) that can be selectively applied. Each tree type segments blocks differently, allowing the system to choose the most appropriate segmentation strategy for different block shapes and content characteristics, thereby improving adaptability without requiring a single complex partitioning structure

The partitioning system transitions from a static fixed-square-block approach to a dynamic multi-tree structure where the partitioning strategy can change based on block characteristics. The decoder adapts the partitioning tree type and splitting behavior according to the current block's properties, enabling flexible adaptation to various block shapes while maintaining manageable complexity through conditional logic

The partitioning tree type (quadtree, binary, or ternary) is determined and configured in advance before the actual block partitioning process. This preliminary action allows the decoder to pre-load the appropriate parsing logic and context models, so that during actual decoding, the system can quickly apply the predetermined partitioning strategy without needing to evaluate multiple options in real-time, thus maintaining precision while reducing decoding time

The patent uses context models that are copied and adapted from previously decoded blocks. Instead of building context models from scratch for each block, the system copies and modifies existing context information, significantly reducing the computational effort required for each partitioning decision while maintaining accurate control over the partitioning process