Image Signal Decoding with Inter-Region Motion Prediction
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Solution Overview
Problem
The increasing demand for high-definition video services is hindered by the significant increase in data volume, necessitating improved video compression techniques, as existing standards like HEVC are reaching their performance limits.
Innovation Solution
A method of partitioning a coding block into multiple prediction blocks, deriving motion information for each block, and using an inter-region motion information table to enhance inter-prediction efficiency through weighted-sum operations and merge candidates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a coding block is treated as a single prediction unit, then the encoding process is simple, but inter-prediction efficiency is insufficient
Solution Approach 1:
The coding block is divided into multiple prediction units (first prediction unit and second prediction unit) based on partition information. Each prediction unit can have its own motion information, allowing independent prediction and improving overall inter-prediction efficiency while maintaining manageable complexity through structured segmentation.
2Measurement precision
If motion information is derived for the entire coding block, then the process is straightforward, but prediction precision for different regions is limited
Solution Approach 1:
Motion information is derived separately for each prediction unit within the coding block. The first prediction unit has first motion information and the second prediction unit has second motion information, allowing each region to have optimized motion parameters tailored to its specific characteristics, thereby improving prediction precision locally.
3Adaptability or versatility
If a single merge candidate list is used, then the structure is simple, but adaptability to different prediction regions is insufficient
Solution Approach 1:
The merge candidate list is segmented into first merge candidates associated with the first prediction unit and second merge candidates associated with the second prediction unit. This allows different merge candidates to be selected and applied to different prediction units, improving adaptability to various prediction regions while maintaining a manageable structure through systematic organization.
Data Source
AI summary
A method for decoding an image includes that: in case to derive a first prediction and a second prediction corresponding to a coding block, a partition type of the coding block is determined; first motion information regarding the first prediction of the coding block and second motion information regarding the second prediction of the coding block are derived; and a prediction sample of the coding block on the basis of the first motion information and the second motion information is acquired.