Intra Prediction Mode Mapping for Lower-Bit Video Coding
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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 the increased amount of data, necessitating more efficient video compression techniques.
Innovation Solution
An intra-prediction mode mapping method that encodes and decodes intra-prediction mode information using a small number of bits by mapping intra-prediction modes to indices in a table, allowing for efficient video encoding and decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high-resolution and high-quality video data is transmitted or stored using existing methods, then video quality is improved, but transmission and storage costs increase
Solution Approach 1:
The patent changes the parameter of intra-prediction mode representation from using multiple bits to using a small number of bits through mapping to specific index values. This parameter change reduces the data volume requiring transmission and storage, thereby lowering costs while maintaining video quality through efficient compression.
2Measurement precision
If more bits are used to encode intra-prediction mode information, then encoding precision is improved, but data volume increases
Solution Approach 1:
The patent transforms the encoding parameter by mapping intra-prediction modes to specific index values (0, 1, or 2) based on comparison with neighboring block modes. This parameter transformation enables precise encoding of prediction mode information using minimal bits, reducing data volume while maintaining encoding accuracy.
Solution Approach 2:
The patent applies different encoding strategies locally based on the relationship between current block and neighboring blocks. When modes match, no additional bits are needed; when they differ, minimal bits are used to indicate the difference. This local quality approach optimizes encoding precision relative to data volume.
Data Source
AI summary
The present invention relates to an intra prediction mode mapping method and a device using the method. The intra prediction mode includes: decoding flag information providing information regarding whether an intra prediction mode of a plurality of candidate intra prediction modes for the current block is the same as the intra prediction mode for the current block, and decoding a syntax component including information regarding the intra prediction mode for the current block in order to induce the intra prediction mode for the current block if the intra prediction mode from among the plurality of candidate intra prediction modes for the current block is not the same as the intra prediction mode for the current block. Thus, it is possible to increase the efficiency with which are images are decoded.