MPM List Configuration for Video Decoding Efficiency
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Solution Overview
Problem
The increasing demand for high-resolution, high-quality images and videos, particularly in applications like virtual reality and augmented reality, necessitates more efficient image/video compression techniques to reduce transmission and storage costs.
Innovation Solution
A method and apparatus for configuring a Most Probable Mode (MPM) list in image coding systems, which includes deriving an intra planar mode as an intra prediction mode candidate without determining if the neighboring block is in intra prediction, enhancing image coding efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional MPM list configuration methods are used (checking whether neighboring block is in intra prediction), then the complexity of determining prediction mode is reduced, but the compression efficiency is insufficient for high-resolution images
Solution Approach 1:
The patent extracts the determination step for checking whether the neighboring block is in intra prediction mode, and removes it from the MPM list configuration process. By taking out this unnecessary determination step, the patent simplifies the overall process while maintaining or improving compression efficiency, as the intra planar mode is always derived as a candidate regardless of the neighboring block's prediction mode.
2Productivity
If the intra planar mode is always derived as an MPM candidate without checking the neighboring block's prediction mode, then the compression efficiency is improved, but the deviation from conventional procedures increases
Solution Approach 1:
Instead of following the conventional approach where the intra planar mode is derived only under specific conditions (when neighboring block is not in intra prediction), the patent inverts the logic by always deriving the intra planar mode as an MPM candidate regardless of the neighboring block's prediction mode. This inversion simplifies the decision logic and improves coding efficiency.
3Measurement precision
If more intra prediction mode candidates are included in the MPM list, then the prediction accuracy is improved, but the amount of information to be transmitted increases
Solution Approach 1:
The patent changes the parameter of MPM list composition by always including the intra planar mode as a candidate, regardless of the neighboring block's prediction mode. This parameter change optimizes the MPM list to better match the actual prediction modes used in high-resolution content, improving prediction accuracy without significantly increasing transmission overhead due to the statistical properties of intra planar mode usage.
Data Source
AI summary
A method for decoding a video performed by a decoding device according to the present disclosure, comprises: a step for deriving a prediction mode of a neighboring block of a current block; a step for deriving an intra prediction mode candidate for configuring an MPM list on the basis of the derived prediction mode of the neighboring block; a step for configuring the MPM list on the basis of the derived intra prediction mode candidate; a step for determining an intra prediction mode for the current block on the basis of the configured MPM list; a step for deriving prediction samples for the current block on the basis of the determined intra prediction mode for the current block; and a step for generating a reconstructed picture on the basis of the prediction samples.