Inter Prediction Information Combination for Video Encoding
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Solution Overview
Problem
Current video encoding and decoding technologies face challenges in efficiently performing inter prediction for high-resolution and high-definition images, particularly in deriving accurate prediction information for target blocks using existing prediction methods.
Innovation Solution
The proposed solution involves an encoding and decoding apparatus that derives combined inter-prediction information by combining inter-prediction information from neighboring blocks, using a processing unit to configure a list for the target block, and generating motion vectors through weighted averaging or extrapolation based on block size and Picture Order Count (POC), which enhances prediction accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional inter-prediction methods are used for high-resolution images, then encoding complexity is reduced, but prediction accuracy deteriorates
Solution Approach 1:
The patent combines inter-prediction information from multiple neighboring blocks (above, left, above-left, above-right, left, right blocks) to generate a unified prediction for the target block. This merging of multiple prediction sources improves prediction accuracy by leveraging spatial correlations from different directions, while the combination process is designed to be computationally efficient through standardized operations like weighted averaging and mode selection based on block characteristics.
2Measurement precision
If multiple neighboring blocks are used for prediction, then prediction accuracy improves, but computational complexity increases
Solution Approach 1:
The patent applies different prediction strategies to different spatial regions by selecting from multiple neighboring blocks based on their individual qualities and characteristics. Each neighboring block's contribution is evaluated locally, and the most suitable prediction source is selected or combined for each region, optimizing the balance between accuracy and computational effort by not uniformly processing all neighboring blocks with the same complexity.
Solution Approach 2:
The patent changes prediction parameters such as weighting factors, block selection criteria, and combination methods based on block size, position, and motion characteristics. By dynamically adjusting these parameters, the system adapts the computational complexity to the actual prediction needs, reducing unnecessary computations while maintaining high accuracy where required.
3Productivity
If combined inter-prediction information is generated, then encoding efficiency improves, but decoding complexity increases
Solution Approach 1:
The patent performs the complex combined prediction generation during the encoding phase, where the encoder has full access to all neighboring block information and can compute the optimal combined prediction. The resulting combined prediction parameters are then transmitted to the decoder, which only needs to reproduce the same prediction using the transmitted parameters, significantly reducing decoding complexity while maintaining encoding efficiency benefits.
Data Source
AI summary
Disclosed herein are a video decoding method and apparatus and a video encoding method and apparatus. In video encoding and decoding, inter-prediction information for a target block may be derived, and inter prediction for a target block may be performed using the derived inter-prediction information. Combined inter-prediction information may be performed by combining multiple pieces of inter-prediction information, and the combined inter-prediction information may be added as a candidate to a list used for inter prediction. One of candidates in the list may be selected for inter prediction for the target block, and inter prediction using the selected candidate may be performed.