Video Signal Weighted Prediction Block Generation
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Solution Overview
Problem
Existing video signal processing technologies face challenges in efficiently performing inter prediction and adaptively determining weights for reference pictures during encoding and decoding, especially for high-resolution and stereographic image content.
Innovation Solution
A method and apparatus for decoding and encoding video signals that obtain a weighted prediction parameter for a current block, determine weights for prediction blocks based on this parameter, and generate a final prediction block through a weighted sum operation, allowing for adaptive weight determination and efficient encoding/decoding of weighted prediction parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional image compression technology is used for high-resolution images, then data transmission and storage costs increase, but image quality and resolution requirements cannot be met
Solution Approach 1:
The patent changes the parameter of prediction precision by introducing sub-pixel level motion compensation and refined prediction block division. This allows achieving better compression ratios and image quality without proportionally increasing transmission and storage costs, effectively resolving the contradiction between image quality and cost.
2Measurement precision
If high-resolution and stereographic image content is processed, then data amount increases, but transmission and storage efficiency decreases
Solution Approach 1:
The patent divides the current picture into multiple prediction blocks and further divides each prediction block into sub-blocks for independent motion estimation. This segmentation allows processing high-resolution and stereographic content more efficiently by applying different motion vectors to different regions, improving compression efficiency without sacrificing resolution.
Solution Approach 2:
The patent applies different prediction modes and motion compensation precision to different blocks based on their characteristics. Important regions receive higher prediction precision while less important regions use lower precision, maintaining overall image quality while improving transmission and storage efficiency.
3Measurement precision
If inter prediction is performed for encoding/decoding target blocks, then processing complexity increases, but prediction accuracy may be insufficient
Solution Approach 1:
The patent dynamically selects prediction modes and adjusts motion compensation precision based on block characteristics and content complexity. This dynamic approach improves prediction accuracy for important regions while avoiding unnecessary processing complexity for simpler regions.
Solution Approach 2:
The patent applies high-precision motion compensation and multiple prediction blocks only where necessary (in regions with significant motion or importance), rather than uniformly across the entire image. This partial application of complex processing maintains accuracy where needed while controlling overall complexity.
Data Source
AI summary
A method for decoding a video according to the present invention may comprise: obtaining a weighted prediction parameter of a current block, determined, based on the weighted prediction parameter, weights applying to a first prediction block generated based on a first reference picture and a second prediction block generated based on a second reference picture, and obtaining, based on a weighted sum of the first prediction block and the second prediction block, a final prediction block of the current block.