Subblock Intra-Prediction for Adaptive Image Block Partitioning
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Solution Overview
Problem
Existing image encoding/decoding methods lack performance improvement and efficiency, particularly in intra-prediction and subblock-wise partitioning.
Innovation Solution
A method and apparatus for image encoding/decoding that configures a candidate group of partition types for a current block, determines a partition type based on a candidate index, and performs intra-prediction in units of the current block.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If subblock-wise intra-prediction is implemented, then prediction accuracy is improved, but device complexity increases
Solution Approach 1:
The current block is divided into multiple subblocks, and intra-prediction is performed separately for each subblock. This segmentation allows the prediction to adapt to local variations within the block, improving prediction accuracy while managing complexity through structured partitioning.
Solution Approach 2:
Different prediction modes are applied to different subblocks based on their local characteristics. Each subblock can have its own prediction mode selected from a candidate group, allowing local optimization of prediction quality without requiring complex global processing.
2Adaptability or versatility
If multiple partition types are configured in candidate group, then adaptability is improved, but device complexity increases
Solution Approach 1:
The system dynamically selects partition types from a candidate group based on the characteristics of the current block. The partition type is not fixed but adapts to different blocks, providing versatility while managing complexity through selective configuration rather than exhaustive processing of all possible types.
3Productivity
If subblock-wise coding order is adapted, then encoding efficiency is improved, but loss of time increases
Solution Approach 1:
The coding order of subblocks is predetermined and adapted based on block characteristics before actual encoding. By establishing the coding order in advance, the system improves encoding efficiency through optimized processing sequence while avoiding time loss from dynamic decision-making during encoding.
Data Source
AI summary
The objective of the present invention is to provide a method and an apparatus for intra-prediction. In addition, the objective of the present invention is to provide a method and an apparatus for intra-prediction on a subblock unit basis. Furthermore, the objective of the present invention is to provide a method and an apparatus for determining a division and an encoding order of subblock units.