Intra-Prediction Mode Coding With Two-Candidate Short Codewords
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Solution Overview
Problem
The increasing demand for high-resolution and high-quality video data leads to higher transmission and storage costs due to increased data volume, necessitating more efficient video compression techniques.
Innovation Solution
An intra-prediction mode decoding method using a fixed number of candidate intra-prediction modes to enhance video coding efficiency by determining and decoding the intra-prediction mode of a current prediction unit based on n-bit and m-bit information, with additional bit specifications and mapping to codewords.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high-resolution and high-quality video data is used, then image quality is improved, but data volume increases leading to higher transmission and storage costs
Solution Approach 1:
The patent extracts and utilizes spatial redundancy within images by performing intra-prediction on prediction units. The encoder predicts pixel values based on neighboring pixels within the same picture, extracting only the residual information that actually varies, thereby reducing the data volume while maintaining image quality.
Solution Approach 2:
The patent segments the image into prediction units (blocks) that can be processed independently. Each prediction unit is divided into smaller blocks that are predicted using intra-prediction modes, allowing efficient compression while maintaining overall image quality through hierarchical processing.
2Adaptability or versatility
If traditional intra-prediction mode encoding is used, then coding flexibility is maintained, but encoding complexity and processing time increase
Solution Approach 1:
The patent performs preliminary actions by pre-defining a limited set of candidate intra-prediction modes (e.g., planar, angular, DC modes) that are most likely to occur. The encoder then only needs to signal which of these pre-defined modes is used, rather than encoding all possible modes, significantly reducing complexity while maintaining coding flexibility.
Solution Approach 2:
The patent applies different intra-prediction modes selectively based on local characteristics of each prediction unit. The mode selection is adapted to the specific content and neighboring pixels of each block, allowing optimal compression for each local region while using a unified simplified encoding approach across the entire image.
Data Source
AI summary
The method for decoding an intra-picture prediction mode includes the steps of: determining whether the intra-picture prediction mode of a current prediction unit is identical to a first intra-picture prediction mode candidate or a second intra-picture prediction mode candidate based on bit information; and when the intra-picture prediction mode of the current prediction unit is identical to the first intra-picture prediction mode candidate and/or to the second intra-picture prediction mode candidate, determining whether the first intra-picture prediction mode candidate or the second intra-picture prediction mode candidate is identical to the intra-picture prediction mode of the current prediction unit on the basis of additional bit information, and decoding the intra-picture prediction mode of the current prediction unit.