Reference-Block Video Prediction for Lower Signaling Overhead
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Solution Overview
Problem
Existing video encoding and decoding technologies face challenges in efficiently predicting pixel values using various prediction methods, particularly in high-resolution and high-definition images, where the choice of prediction method significantly impacts efficiency and accuracy.
Innovation Solution
The proposed solution involves using information about spatially and temporally neighboring blocks as reference blocks for prediction, selecting a prediction mode from multiple modes based on this information, and optionally omitting certain decision parameters to optimize the prediction process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple prediction modes are used to improve prediction accuracy, then prediction efficiency is improved, but device complexity and signaling overhead increase
Solution Approach 1:
The patent implements dynamic prediction mode selection where the decoder adapts between different prediction modes (intra, inter, skip) based on block characteristics and reference block availability. This dynamic adaptation allows the system to use complex prediction modes when beneficial while falling back to simpler modes when appropriate, resolving the contradiction between accuracy and complexity
Solution Approach 2:
The patent changes the parameter of prediction mode selection by introducing reference block information as a key decision factor. When reference blocks are available and match well with the current block, the system switches to reference-based prediction modes; otherwise, it uses traditional intra/inter prediction modes. This parameter change enables adaptive complexity management
2Measurement precision
If reference block information is used to improve prediction accuracy, then prediction efficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential reference block information needed for prediction (reference block location and prediction mode) while omitting redundant details. This selective extraction reduces signaling overhead while maintaining prediction accuracy, as the decoder can reconstruct the reference blocks from previously decoded data
Solution Approach 2:
The reference blocks are derived from previously decoded blocks that are already available in the decoder's buffer, eliminating the need to transmit reference block data separately. The system serves itself by reusing existing decoded information, reducing signaling overhead while maintaining prediction accuracy
3Device complexity
If traditional prediction methods are used, then device complexity is reduced, but prediction accuracy deteriorates in high-resolution videos
Solution Approach 1:
The patent segments the prediction process into multiple stages: reference block identification, reference block derivation, prediction mode selection, and actual prediction execution. This segmentation allows the system to use simple methods for blocks that don't require reference prediction while applying complex reference-based methods only where needed, maintaining accuracy without uniformly increasing complexity
Data Source
AI summary
Disclosed herein are a video decoding method and apparatus and a video encoding method and apparatus. In the encoding and decoding of a video, a prediction mode may be selected from among multiple prediction modes using prediction mode information for a target block, and prediction may be performed on the target block based on the selected prediction mode, wherein the prediction mode information includes information related to a reference block, and wherein the reference block comprises one or more of a spatially neighboring block that is spatially adjacent to the target block and a temporally neighboring block that is temporally adjacent to the target block. When the selected prediction mode includes a plurality of prediction modes, a prediction mode to be used for prediction of the target block may be decided on among the plurality of selected prediction modes through signaling of the prediction mode decision information.