Curved Intra Prediction for High-Resolution Block Encoding
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Solution Overview
Problem
Conventional image encoding/decoding techniques for high-resolution and high-quality images face inefficiencies due to the limitation of straight-directional intra prediction, leading to increased costs in data transmission and storage.
Innovation Solution
Incorporation of curved intra prediction modes, including information on intra prediction modes, reference pixel positions, and curvature or weight parameters, allowing for improved encoding/decoding efficiency by enabling both straight-directional and curved directional predictions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If straight-directional intra prediction is used, then the encoding/decoding process is simple, but the encoding efficiency is insufficient for high-resolution images
Solution Approach 1:
The current block is divided into multiple pixel groups, and different prediction modes (straight-directional and curved directional) are applied to different pixel groups. This segmentation allows the system to maintain simplicity for regions suitable for straight prediction while applying curved prediction only where needed, thus improving overall encoding efficiency without excessively increasing complexity.
Solution Approach 2:
The patent introduces curved directional intra prediction as a dynamic extension of the conventional straight-directional prediction. By allowing the prediction mode to adapt between straight and curved based on the characteristics of different pixel groups, the system dynamically optimizes encoding efficiency while managing complexity through selective application.
2Productivity
If curved intra prediction modes are incorporated, then encoding efficiency is improved, but device complexity increases
Solution Approach 1:
Different prediction modes are applied to different local regions (pixel groups) within the current block based on their specific characteristics. This local quality approach ensures that curved directional prediction is used only where it provides benefit, improving encoding efficiency while limiting the increase in overall device complexity by confining complex operations to specific local areas rather than applying them globally.
Data Source
AI summary
An image decoding/encoding apparatus and method are discussed. The image decoding method can include obtaining a coding block by partitioning an image, determining a split type for the coding block based on a size of the coding block, deriving a current coding block split from the coding block based on the split type for the coding block, and reconstructing the current coding block.