Intra Prediction Candidate Grouping for Video Encoding Efficiency
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Solution Overview
Problem
The increasing demand for high-resolution and high-quality images leads to a surge in data volume, resulting in higher transmission and storage costs, necessitating improved encoding/decoding efficiency of intra prediction in video signals.
Innovation Solution
A method and device that determine a candidate group for intra prediction mode based on a flag, using a first or second candidate group, where the second group is configured with neighboring block modes and derived by adding or subtracting a value to the neighboring block's mode, to enhance encoding/decoding efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-resolution and high-quality images are transmitted or stored using existing media and storage systems, then image quality is improved, but transmission expenses and storage expenses increase
Solution Approach 1:
The patent extracts and transmits only the essential visual information by using intra prediction to generate reference blocks and encoding only the difference between the actual block and predicted block. This selective extraction of necessary data reduces transmission volume while preserving image quality, directly addressing the contradiction between high quality and high transmission cost.
Solution Approach 2:
The patent changes the encoding parameters by introducing multiple candidate groups for intra prediction modes and using flags to indicate which group to use. This parameter optimization enables more efficient compression ratios, reducing transmission expenses while maintaining high-quality image reconstruction through optimized prediction accuracy.
2Manufacturing precision
If the number of candidate modes for intra prediction is increased to improve prediction accuracy, then encoding precision is improved, but the complexity of mode selection and processing increases
Solution Approach 1:
The patent segments the candidate modes into multiple candidate groups, where each group contains a subset of prediction modes. By organizing modes into groups and using flags to indicate which group to select, the patent reduces the complexity of mode selection while maintaining access to diverse prediction strategies, thus balancing accuracy and computational complexity.
Solution Approach 2:
The patent performs preliminary organization of candidate modes into groups before the actual prediction process. This pre-structuring allows the decoder to quickly select an appropriate group based on the flag information without having to evaluate all possible modes, thereby reducing processing complexity while preserving prediction accuracy through the structured candidate selection.
Data Source
AI summary
A video encoding/decoding device according to the present invention may determine an intra prediction mode of a current block on the basis of a most probable mode (MPM) of the current block or an intra prediction mode of a neighboring block, determine a reference region for intra prediction of the current block, and perform intra prediction on the current block by using the intra prediction mode and the reference region.