Intra Prediction Mode Mapping for Image Encoding Efficiency
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Solution Overview
Problem
The increasing demand for high-resolution and high-quality images, such as HD and UHD images, leads to a significant increase in the amount of transmitted and stored information, resulting in higher transmission and storage costs. There is a need for high-efficient image compression technology to address this challenge.
Innovation Solution
An image encoding/decoding method and apparatus that improves encoding/decoding efficiency by mapping the intra prediction mode of a neighboring block to a predetermined prediction mode, reducing prediction complexity and optimizing bitstream transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-resolution and high-quality images are transmitted, then image quality is improved, but transmission cost and storage cost increase
Solution Approach 1:
The patent applies parameter changes by transforming the intra prediction mode of neighboring blocks into predetermined prediction modes (such as planar, DC, horizontal, or vertical modes) based on specific conditions. This transformation optimizes the prediction parameters to achieve better compression efficiency, thereby reducing the amount of transmitted information while maintaining high image quality.
2Productivity
If prediction complexity is reduced, then encoding efficiency is improved, but prediction accuracy may deteriorate
Solution Approach 1:
The patent applies local quality by differentiating the treatment of prediction modes based on local characteristics. Specifically, when certain conditions are met (such as when a neighboring block has a specific prediction mode), the system maps to predetermined prediction modes that are locally optimized. This allows the system to achieve both simplicity and accuracy in specific local regions while maintaining overall encoding efficiency.
Data Source
AI summary
An image encoding/decoding method and apparatus are provided. An image decoding method performed by an image decoding apparatus may include identifying a prediction mode of a current block, determining a candidate intra prediction mode for the current block, based on a prediction mode of a neighboring block located around the current block, based on the intra prediction mode of the current block being an intra prediction mode, generating a candidate intra prediction mode list of the current block based on the candidate intra prediction mode, and determine an intra prediction mode of the current block based on the candidate intra prediction mode list. In this case, the candidate intra prediction mode may be determined to be a predetermined intra prediction mode, based on the prediction mode of the neighboring block being an MIP mode.