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Proceedings Paper

Combating error bursts for enhanced video transmission using cross-packet FEC and description interleaving
Author(s): Milos Tesanovic; David R. Bull; Angela Doufexi
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Paper Abstract

This paper demonstrates the effectiveness of employing MDC (multiple-description coding) as a video decomposition for transmission in the presence of error bursts, with application to both SISO and MIMO-STBC (space-time block coding) systems envisaged. Various trade-offs involving video encoding parameters are investigated that offer improved performance and reduce the decoding delay for the given channel conditions, based on the Gilbert-Elliot channel model. This results in a joint source-channel coding approach that significantly enhances the quality of the transmitted video. While interleaving without the use of MDC does yield improvements in average PSNR of up to 1dB, these may not be justified given the high decoding delay incurred. The use of MDC increases these improvements to over 2dB, and also outperforms SDC coupled with cross-packet FEC. In addition, when FEC is combined with MDC, a gain of up to 2dB is obtained compared to the equivalent SDC+FEC scheme (for average PERs above 5%), and up to 5dB compared to the values obtained from simple SDC interleaving. Unlike simple interleaving, the use of MDC and FEC entails some increased complexity and a decrease in error-free quality. Simple interleaving, however, cannot achieve the gains available from MDC/FEC in the presence of error bursts, irrespective of the interleaving depth employed and the resulting decoding delay.

Paper Details

Date Published: 28 January 2008
PDF: 9 pages
Proc. SPIE 6822, Visual Communications and Image Processing 2008, 68220V (28 January 2008); doi: 10.1117/12.766434
Show Author Affiliations
Milos Tesanovic, Univ. of Bristol (United Kingdom)
David R. Bull, Univ. of Bristol (United Kingdom)
Angela Doufexi, Univ. of Bristol (United Kingdom)

Published in SPIE Proceedings Vol. 6822:
Visual Communications and Image Processing 2008
William A. Pearlman; John W. Woods; Ligang Lu, Editor(s)

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