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Proceedings Paper

Feature-based adaptive error concealment for image transmission over wireless channel
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Paper Abstract

Error concealment is becoming increasingly important because of the growing interest in multimedia transmission over unreliable channels such as wireless channel. At present most concealment method has its own advantage as well as applicable limitation. In different case, it can achieve different concealment effect. In our paper, we present a novel feature-based image error detection and error concealment algorithm to improve the image quality which was degraded during its transmission over wireless channel. First a simulation channel based on Rayleigh mode is implemented to emulating the actual wireless fading channel characterized by fading, multipath and Doppler frequency shift. The damaged image blocks are detected by exploring the contextual information in images, such as their consistency and edge continuity. The statistical characteristics of missing blocks are then estimated based on the types of their surrounding blocks (e.g., smoothness, texture and edge). Finally different error concealment strategies are applied to different types of blocks in order to achieve better visual quality. Instead of assuming random errors in packets, we simulate the errors of wireless channel based on the Rayleigh model. The proposed algorithm is tested on a number of still images. Simulation results demonstrate that our proposed algorithm is effective in terms of visual quality assessment and PSNR.

Paper Details

Date Published: 7 May 2003
PDF: 11 pages
Proc. SPIE 5022, Image and Video Communications and Processing 2003, (7 May 2003); doi: 10.1117/12.476365
Show Author Affiliations
Shuiming Ye, Tsinghua Univ. (China)
Guijin Wang, Tsinghua Univ. (China)
Xinggang Lin, Tsinghua Univ. (China)

Published in SPIE Proceedings Vol. 5022:
Image and Video Communications and Processing 2003
Bhaskaran Vasudev; T. Russell Hsing; Andrew G. Tescher; Touradj Ebrahimi, Editor(s)

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