An Efficient Spatial Error Concealment for Video Transmission

Xu Zhiliang; Xie Shengli; Zhou Zhiheng

Journal of Computer Research and Development > 2006 > 43(3): 536-541.

Xu Zhiliang, Xie Shengli, Zhou Zhiheng. An Efficient Spatial Error Concealment for Video Transmission[J]. Journal of Computer Research and Development, 2006, 43(3): 536-541.

Citation:

Xu Zhiliang, Xie Shengli, Zhou Zhiheng. An Efficient Spatial Error Concealment for Video Transmission[J]. Journal of Computer Research and Development, 2006, 43(3): 536-541.

Citation:

Xu Zhiliang, Xie Shengli, Zhou Zhiheng. An Efficient Spatial Error Concealment for Video Transmission[J]. Journal of Computer Research and Development, 2006, 43(3): 536-541.

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An Efficient Spatial Error Concealment for Video Transmission

1(College of Electronic & Information Engineering, South China University of Technology, Guangzhou 510641) 2(College of Physics and Electronic Communication Engineering, Jiangxi Normal University, Nanchang 330027)

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Published Date: March 14, 2006

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Abstract

Abstract

The encoded bit streams of video transmitted in error-prone channel are vulnerable to transmission errors, which usually result in missing blocks at the decoder. In this paper, an efficient spatial error concealment method for video transmission is proposed. The missing blocks are classified into uniform blocks and edge blocks by using the edge information extracted from the surrounding correctly received blocks. For the missing blocks, which are uniform blocks, the error can be concealed by simple linear interpolation. For the missing blocks, which are edge blocks, the initial values of the missing blocks can be obtained by prediction based on gradient adaptive prediction (GAP). The maximum a posteriori (MAP) method is used to implement the optimization with the initial value of the missing block. The experimental results demonstrate that the proposed algorithm not only can obtain excellent image quality, but also can be applied for real-time video transmission because of low computational complexity.
- error concealment,
- GAP,
- Markov random field (MRF)

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