Image Signal Decoding with Partitioned Motion Prediction Blocks
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Solution Overview
Problem
The increasing demand for high-definition video services is hindered by the significant increase in data volume, and existing video compression standards like HEVC are showing limitations in efficiency.
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 by determining and applying weighted-sum operations for prediction samples.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a coding block is partitioned into multiple prediction blocks with separate motion information derivation, then inter-prediction efficiency is improved, but device complexity increases
Solution Approach 1:
The coding block is divided into multiple prediction blocks, each with its own motion information derivation process. This segmentation allows independent optimization of motion vectors for different regions, improving prediction accuracy and efficiency while managing complexity through structured division.
Solution Approach 2:
The patent introduces dynamic motion information derivation where motion vectors are adaptively determined based on the specific characteristics of each prediction block. This dynamic approach allows the system to optimize performance for different content types and regions without requiring a completely complex static system.
2Measurement precision
If motion information is derived separately for each prediction block, then prediction accuracy improves, but processing time increases
Solution Approach 1:
By segmenting the coding block into prediction blocks with separate motion information derivation, the system achieves higher prediction accuracy through region-specific motion vectors. The segmentation is designed to balance accuracy improvement with acceptable processing time through efficient division strategies.
Solution Approach 2:
Motion information for prediction blocks is derived in a predetermined sequence based on the partition structure. This preliminary action approach allows the system to prepare motion vectors in an optimized order that improves accuracy while managing processing time through structured computation flow.
3Productivity
If HEVC compression standard is used, then compression performance is improved, but data volume still increases significantly
Solution Approach 1:
The patent applies segmentation by dividing the coding block into prediction blocks with separate motion information. This finer-grained segmentation enables more precise motion compensation, which improves compression performance and helps reduce the effective data volume by better exploiting temporal redundancy.
Solution Approach 2:
The system changes the motion information parameters by deriving separate motion vectors for each prediction block rather than using a single motion vector for the entire block. This parameter refinement improves compression efficiency and helps mitigate the data volume increase by enhancing the compression ratio.
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; an index of a second merge candidate is determined based on a comparison between a value of second index information and a value of first index information; 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.