Intra Prediction Decoding Using Pixel Correlation Parameters
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Solution Overview
Problem
Existing video signal decoding methods face inefficiencies due to incomplete removal of spatial and temporal redundancies, leading to reduced compression rates and recovery rate issues.
Innovation Solution
A method and apparatus for decoding video signals that utilize block type information to confirm prediction modes, obtain correlation parameter information using reference pixels, and reconstruct blocks using intra prediction values, enhancing coding efficiency by considering pixel correlations and reducing rounding errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If spatial and temporal redundancy are excessively removed during compression coding, then compression rate increases, but decoding accuracy deteriorates due to information loss
Solution Approach 1:
The patent applies feedback by using decoded reference pixels from previously reconstructed blocks to generate intra-prediction values for current blocks. The decoder continuously refines its predictions by comparing predicted values with actual decoded values and adjusting subsequent predictions based on this feedback, thereby maintaining decoding accuracy even with high compression rates.
Solution Approach 2:
The patent performs preliminary action by pre-processing reference pixels through filtering operations before using them for intra-prediction. The decoder applies smoothing filters to reference pixels adjacent to the current block, preparing enhanced reference data in advance that improves prediction accuracy without requiring additional transmitted information.
2Device complexity
If simple intra-prediction methods are used, then decoding complexity is reduced, but prediction accuracy deteriorates due to rounding errors
Solution Approach 1:
The patent changes parameters by applying different filtering operations to reference pixels based on their position and the prediction mode being used. The decoder selectively applies smoothing filters with different characteristics to different reference pixels, optimizing prediction accuracy for various block types and prediction directions while managing computational complexity.
Solution Approach 2:
The patent applies partial action by selectively filtering only the necessary reference pixels that are actually used for intra-prediction, rather than processing all pixels in the reference block. This selective approach reduces unnecessary computational operations while maintaining prediction accuracy for the critical reference data.
Data Source
AI summary
A method and apparatus for decoding a video signal are disclosed. A method for decoding a video signal includes obtaining block type information of a current block, confirming a prediction mode of the current block based on the block type information, obtaining, if the prediction mode of the current block is an intra prediction mode according to the prediction mode, at least one correlation parameter information using at least one neighboring pixel of the current block, obtaining an intra prediction value of the current block using the correlation parameter information, and reconstructing the current block using the intra prediction value of the current block.