Spatial Error Concealment Using Adaptive Interpolation
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Solution Overview
Problem
Existing spatial error concealment methods for video compression, such as those used in the H.264/AVC standard, face high computational complexity, which hinders efficient error recovery in video transmission, especially in scenarios with packet erasures.
Innovation Solution
A method that switches between bilinear interpolation (BI) and directional interpolation (DI) algorithms for spatial error concealment, using edge direction information from neighboring blocks to reconstruct damaged pixels, thereby reducing computational complexity and improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If spatial error concealment methods are used to recover damaged video sequences, then display quality is improved, but computational complexity increases
Solution Approach 1:
The patent changes the parameter of edge detection by using encoding information (intra prediction mode) instead of traditional gradient-based methods. This parameter change maintains the ability to detect edge directions while significantly reducing computational complexity, as the encoding information is already available from the video decoding process
Solution Approach 2:
The patent makes the error concealment process self-service by utilizing the intra prediction mode information that is already generated during video decoding. Instead of requiring separate, computationally intensive edge detection algorithms, the system leverages the existing encoding information to guide the interpolation process, thereby reducing additional computational burden
2Manufacturing precision
If traditional edge detection algorithms are used in spatial error concealment, then edge preservation is improved, but computation time increases
Solution Approach 1:
The patent applies preliminary action by using the intra prediction mode information that has already been determined during the video encoding process. This pre-computed information is directly utilized for error concealment, eliminating the need for additional edge detection computations and thereby reducing computation time while maintaining edge preservation capability
3Device complexity
If bilinear interpolation is used for error concealment, then computational complexity is reduced, but edge preservation capability deteriorates
Solution Approach 1:
The patent applies dynamics by making the interpolation process adaptive based on the detected edge direction. Instead of using a fixed bilinear interpolation approach, the system dynamically selects interpolation directions and weights based on the intra prediction mode of neighboring blocks, thereby preserving edges while maintaining reasonable computational complexity
Data Source
AI summary
A method for performing spatial error concealment is provided. The method includes the following steps: detecting a damaged macroblock; obtaining coding information of neighboring macroblocks of the damaged macroblock; determining edge feature of the damaged macroblock based on the coding information; and according to the edge feature, selecting a bilinear interpolation algorithm or a directional interpolation algorithm to conceal errors within the damaged macroblock.