Subblock Intra-Prediction Partition Selection in Image Coding
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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 independently 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 local characteristics. Each subblock can have its own prediction mode selected from a candidate group, allowing the system to adapt to local image features and improve overall prediction accuracy.
2Adaptability or versatility
If a candidate group of partition types is configured, then adaptability is improved, but device complexity increases
Solution Approach 1:
The system dynamically selects partition types from a pre-configured candidate group based on the specific characteristics of each current block. This dynamic adaptation allows the encoding/decoding process to respond to varying image content while drawing from a manageable set of predefined partition options.
Solution Approach 2:
The system changes partitioning parameters (partition types, subblock sizes, coding orders) based on the specific requirements of each block. By configuring a candidate group of partition types, the system can adaptively select the most appropriate parameters for different image regions without exhaustively searching all possible configurations.
3Productivity
If intra-prediction is performed in units of current block, then encoding efficiency is improved, but processing time increases
Solution Approach 1:
The current block is segmented into subblocks for parallel processing. By performing intra-prediction on smaller subblocks independently, the system can process multiple regions simultaneously, reducing overall processing time while maintaining encoding efficiency through block-based operation.
Solution Approach 2:
A candidate group of partition types and prediction modes is pre-configured before the actual encoding/decoding process. This preliminary preparation allows the system to quickly select from predefined options during processing, reducing the computational burden and processing time during the main encoding/decoding operation.
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.