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Proceedings Paper

Block turbo codes for efficient image transmission over wireless channels
Author(s): Sonia Zaibi; Mahmoud Ammar; Karine Amis; Ramesh Pyndiah; Samir Saoudi
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Paper Abstract

In this paper we propose an image coding scheme based on Block Turbo Codes (BTC) for protecting SPIHT coded images transmitted over wireless channels. An Unequal Error Protection (UEP) scheme using different product codes is also presented. The optimization of the UEP scheme under a transmission budget constraint is investigated. Performance of the proposed system are first evaluated over Gilbert-Elliott (GE) channels. They are then compared to the well-known system of Sherwood and Zeger, through numerical simulations over a single path Rayleigh fading channel. Then, we present an optimized mobile image transmission framework involving a multiuser asynchronous DS-CDMA transmission system over Rayleigh multipath channels. Simulation results for the 512x512 Lena image, transmitted over the ITU Vehicular A channel, show that a significant gain in PSNR is obtained by using the SIC/RAKE multiuser detector in comparison with a conventional detection by the RAKE receiver. Furthermore, performance are also improved when introducing the UEP scheme.

Paper Details

Date Published: 18 January 2004
PDF: 10 pages
Proc. SPIE 5308, Visual Communications and Image Processing 2004, (18 January 2004); doi: 10.1117/12.525701
Show Author Affiliations
Sonia Zaibi, Ecole Nationale Supérieure des Télécommunications de Bretagne (France)
Mahmoud Ammar, Ecole Nationale Supérieure des Télécommunications de Bretagne (France)
Karine Amis, Ecole Nationale Supérieure des Télécommunications de Bretagne (France)
Ramesh Pyndiah, Ecole Nationale Supérieure des Télécommunications de Bretagne (France)
Samir Saoudi, Ecole Nationale Supérieure des Télécommunications de Bretagne (France)


Published in SPIE Proceedings Vol. 5308:
Visual Communications and Image Processing 2004
Sethuraman Panchanathan; Bhaskaran Vasudev, Editor(s)

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