Inter Prediction GPM Candidate Lists With Duplicate Motion Removal
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Solution Overview
Problem
The existing video encoding and decoding technologies suffer from inefficiencies in expressing motion information due to the high probability of duplicate motion vectors in the constructed motion information candidate list, particularly in the Geometrical Partition Mode (GPM), which affects the efficiency of video encoding and decoding.
Innovation Solution
A method for inter prediction that involves constructing a GPM motion information candidate list by performing duplicate information removal processing on the merge candidate list, reducing the length of the candidate list and improving the expression efficiency of motion information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If duplicate checking and duplicate removal operations are performed in the construction process of a Merge list, then the expression efficiency of motion information is improved, but the complexity of the construction process increases
Solution Approach 1:
The patent performs duplicate checking and removal operations during the construction process of the motion information candidate list, before the list is finalized and used for prediction. By addressing the duplicate issue preliminarily during construction rather than after, the method ensures high expression efficiency while managing complexity through integrated processing.
2Ease of manufacture
If a one-odd and one-even mode is selected to select only motion vectors in one direction are selected in items of each merge list to construct a GPM motion information candidate list, then the construction of GPM motion information is simplified, but duplicate items still appear in the constructed list
Solution Approach 1:
The patent extracts and removes duplicate motion information items from the constructed candidate list. By identifying and taking out redundant entries after construction, the method maintains the simplicity of the construction process while eliminating the harmful effect of duplicate items that reduce expression efficiency.
Data Source
AI summary
Embodiments of the present application provide an inter prediction method, an encoder, a decoder, and a storage medium. The method comprises: determining a prediction mode parameter of a current block; when the prediction mode parameter indicates that the current block determines an inter prediction value by using a geometrical partition mode (GPM), constructing a merge candidate list of the current block; constructing a GPM motion information candidate list according to first motion information in the merge candidate list of the current block; and determining an inter prediction value of the current block according to the GPM motion information candidate list.