Chroma Intra Prediction Mode Selection for Video Coding Efficiency
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Solution Overview
Problem
Existing video coding technologies face challenges in improving coding and compression efficiency, particularly in the derivation of intra prediction modes for chroma components.
Innovation Solution
The proposed method involves determining a linear model (LM) mode and an intra prediction mode (IPM) for chroma components, combining predicted signals using these modes, and performing conversions based on the combined set of signals, as well as deriving an IPM from a candidate list to minimize cost during video processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional intra prediction methods are used for chroma components, then the coding process is simple, but coding efficiency and compression efficiency are insufficient
Solution Approach 1:
The patent combines linear model (LM) mode and intra prediction mode (IPM) to generate predicted signals for chroma components. By merging multiple prediction approaches, the system achieves better coding efficiency while managing complexity through systematic integration of prediction modes.
Solution Approach 2:
The patent derives IPM from a candidate list by evaluating multiple parameters including cost functions and prediction accuracy. By dynamically selecting prediction modes based on parameter optimization, the system improves compression efficiency without requiring exhaustive search of all possible modes.
2Loss of energy
If multiple prediction modes are evaluated to improve compression efficiency, then coding efficiency improves, but computational complexity increases
Solution Approach 1:
The patent uses cost function evaluation to select the optimal IPM from a candidate list. By changing parameters such as prediction mode indices and evaluating them against cost metrics, the system achieves better compression efficiency while limiting computational complexity through selective evaluation rather than exhaustive search.
Solution Approach 2:
The system performs self-optimization by automatically selecting the best prediction mode based on locally available information and cost evaluation. This self-service approach allows the encoder to adapt to local image characteristics without requiring complex external control, improving compression efficiency while keeping the system relatively simple.
Data Source
AI summary
Embodiments of the disclosure provide a solution for video processing. A method for video processing is proposed, and includes: deriving, during a conversion between a target block of a video and a bitstream of the vide, an intra prediction mode (IPM) of the target block for at least one chroma component, the target block being applied with a target coding tool; obtaining a prediction of the target block for the at least one chroma component using the IPM, wherein during a derivation of the IPM for the at least one chroma component, an intra prediction is processed on a first template using one of IPMs from a first IPM candidate list, and a candidate IPM with a minimum cost is derived as the IPM for the at least one chroma component; and performing the conversion based on the prediction of the target block for the at least one chroma component.