Component-Dependent Intra-Inter Prediction Signaling for Video Coding
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Solution Overview
Problem
Existing video coding technologies face inefficiencies in predicting color components, particularly in inter and intra prediction modes, leading to suboptimal compression ratios and increased data requirements.
Innovation Solution
The proposed method allows for flexible selection of intra and inter prediction modes for different color components within a video block, using cross-component linear models and adaptive signaling to determine the most efficient prediction mode for each color component based on context and template matching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single prediction mode is used for all color components, then device complexity is reduced, but compression efficiency deteriorates
Solution Approach 1:
The patent divides the color components (luma and chroma) into separate groups that can be independently predicted. Different prediction modes can be selected for luma components versus chroma components, allowing optimized compression for each component type while maintaining manageable complexity through structured segmentation of the prediction process
Solution Approach 2:
The patent implements a unified prediction structure that can adaptively apply different prediction modes (intra, inter, or combined) to different color components based on their characteristics. This multi-functional approach allows the same prediction framework to serve multiple color components with different optimal prediction strategies, achieving high compression efficiency without requiring completely separate prediction systems
2Productivity
If different prediction modes are selected for each color component, then compression efficiency is improved, but device complexity increases
Solution Approach 1:
The patent applies different prediction quality levels and modes to different color components based on their local characteristics. Luma components may use more complex inter prediction with motion compensation, while chroma components may use simpler intra prediction, optimizing compression efficiency for each component's specific requirements without uniformly increasing complexity across all components
Solution Approach 2:
The patent introduces adaptive signaling mechanisms that dynamically select prediction modes for different color components based on content characteristics, block size, and other contextual factors. This dynamic adaptation allows the system to achieve high compression efficiency when needed while falling back to simpler modes when appropriate, balancing compression performance with computational complexity
3Device complexity
If traditional intra coding without intra prediction is used, then device complexity is reduced, but loss of information increases
Solution Approach 1:
The patent introduces prediction samples as an intermediary between the original signal and the transformed/quantized representation. By generating prediction samples from neighboring blocks and using them to form residuals, the system reduces the magnitude of information that needs to be encoded, thereby reducing quantization error and information loss while maintaining a relatively simple coding structure
4Loss of information
If lossless compression is used, then loss of information is reduced, but data requirements increase
Solution Approach 1:
The patent employs transform processing and quantization as parameter changes that convert the signal from the spatial domain to the frequency domain, then apply controlled information loss through quantization. By adjusting quantization step sizes and selecting appropriate transform types, the system can achieve acceptable reconstruction quality at lower bitrates compared to lossless compression, which would require encoding all residual details without transformation
Data Source
AI summary
Coded information of a first color component and a second color component associated with a current block is determined. A first prediction mode is determined to be selected from an intra prediction mode, an inter prediction mode, or a combined intra-inter prediction mode for the first color component associated with the current block. A second prediction mode is determined to be selected from the intra prediction mode, the inter prediction mode, or the combined intra-inter prediction mode for the second color component associated with the current block. The second prediction mode is different from the first prediction mode. The current block is reconstructed based on predicting the first color component of the current block in the first prediction mode and predicting the second color component of the current block in the second prediction mode.