Affine Motion Prediction Decoding with Two-Candidate Merge Lists
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing demand for high-resolution, high-quality images leads to higher transmission and storage costs due to the increased amount of information, necessitating a more efficient image compression technique.
Innovation Solution
An image decoding method and apparatus that constructs an affine merge candidate list with a maximum of two inherited affine candidates, deriving control point motion vectors (CPMVs) for control points (CPs) of the current block, and generating a reconstructed picture based on these vectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of inherited affine candidates is increased to improve prediction accuracy, then the prediction precision is improved, but the calculation complexity increases
Solution Approach 1:
The patent changes the parameter of the number of inherited affine candidates from the conventional larger number to a maximum of two, thereby reducing calculation complexity while maintaining adequate prediction precision through selective candidate derivation from left and top block groups
2Productivity
If more affine candidates are constructed and evaluated, then the coding efficiency is improved, but the processing time increases
Solution Approach 1:
The patent applies partial action by deriving only a maximum of two inherited affine candidates from specific block groups (left and top) rather than evaluating all possible neighboring blocks, achieving sufficient coding efficiency with reduced processing time
Data Source
AI summary
An image decoding method performed by means of a decoding device according to the present disclosure comprises the steps of: configuring an affine merge candidate list with respect to a current block; deriving CPMVs with respect to CPs of the current block on the basis of the affine merge candidate list; deriving prediction samples with respect to the current block on the basis of the CPMVs; and generating a reconstructed picture with respect to the current block on the basis of the derived prediction samples, wherein the maximum number of inherited affine candidates is two, a first inherited affine candidate is derived on the basis of a left block group of the current block, and a second inherited affine candidate is derived on the basis of an upper block group of the current block.