Cross-Component Video Coding for Intra and Chroma Blocks
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Solution Overview
Problem
Conventional video coding techniques suffer from suboptimal coding gain and efficiency, particularly in handling intra block, intra block copy, and chroma block conversions.
Innovation Solution
Implementing a cross-component residual model (CCRM) for video units, including intra blocks, intra block copies, and chroma blocks, to enhance filter terms and model types, thereby improving coding efficiency and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional video coding techniques are used for intra block, intra block copy, and chroma block conversions, then the coding process is simple, but the coding gain and efficiency are suboptimal
Solution Approach 1:
The patent applies cross-component residual modeling by changing the parameters and model types used in video coding. Specifically, it uses linear models with slope adjustment parameters and offset parameters to transform the coding approach, improving coding efficiency by better capturing chroma-luma correlations without excessively increasing complexity
Solution Approach 2:
The patent segments the video coding process by applying different modeling approaches to different block types (intra blocks, intra block copy blocks, chroma blocks). This segmentation allows optimized processing for each block type while maintaining overall system manageability and complexity control
2Manufacturing precision
If conventional video coding techniques are used, then the implementation is straightforward, but the coding performance is insufficient
Solution Approach 1:
The patent applies local quality by using slope adjustment parameters that are specifically tailored for different regions and block types. The filter terms and model types are locally optimized for intra blocks, intra block copy blocks, and chroma blocks, improving coding performance by capturing local chroma-luma correlations more accurately
Solution Approach 2:
The patent introduces intermediary elements such as slope adjustment parameters and offset parameters that mediate between luma and chroma components. These intermediaries enable more precise modeling of the relationship between different color components, thereby improving coding performance without directly increasing the complexity of the core coding structure
Data Source
AI summary
Embodiments of the disclosure provide a solution for video processing. A method for video processing is proposed. The method includes: determining, for a conversion between a video unit of a video and a bitstream of the video, that a cross-component model is used for at least one of the followings associated with the video unit: an intra block, an intra block copy (IBC) block, or a chroma block; and performing the conversion based on the cross-component model.