Chroma Intra Mode Restriction for Video Coding Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current video coding technologies face challenges in efficiently representing chroma blocks of varying sizes, particularly when using intra coding modes, dual tree partitioning, single tree partitioning, and combined inter and intra prediction modes.
Innovation Solution
The proposed method involves converting chroma blocks of specific sizes within video regions during video processing, adhering to rules that prohibit certain coding modes, such as intra coding, based on the block dimensions and partitioning techniques used.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If intra coding mode is used for chroma blocks, then coding flexibility is improved, but coding efficiency deteriorates for small blocks
Solution Approach 1:
The patent changes the parameter of block size (M×N) to determine coding mode selection. By establishing size-based thresholds, the system automatically switches between intra and inter coding modes, optimizing coding efficiency while maintaining flexibility through adaptive parameter adjustment based on block dimensions.
2Adaptability or versatility
If dual tree partitioning is used for chroma blocks, then partitioning flexibility is improved, but representation efficiency deteriorates for small blocks
Solution Approach 1:
The patent uses block size parameters (M and N) to control the selection of partitioning modes. By changing the parameter threshold for enabling dual tree partitioning based on chroma block dimensions, the system maintains partitioning flexibility for large blocks while preventing representation efficiency loss for small blocks through parameter-based constraints.
3Measurement precision
If combined inter and intra prediction mode is used for chroma blocks, then prediction accuracy is improved, but bandwidth consumption increases
Solution Approach 1:
The patent changes the parameter of block size to control the selection of prediction modes. By establishing size-based criteria for enabling combined inter and intra prediction, the system achieves high prediction accuracy for large chroma blocks while reducing bandwidth consumption for small blocks through parameter-driven mode selection.
Data Source
AI summary
A method of video processing is described. The method includes performing a conversion between a chroma block of a video region of a video picture of a video and a coded representation of the video according to a rule. The rule specifies that, due to the chroma block having a size M×N, the chroma block is disallowed to be represented in the coded representation using an intra coding mode. M and N are integers that indicate a width and a height of the chroma block, respectively. The intra coding mode includes coding the chroma block based on a previously coded video region of the video picture.