Open Access

Source-Adaptation-Based Wireless Video Transport: A Cross-Layer Approach

EURASIP Journal on Advances in Signal Processing20062006:028919

https://doi.org/10.1155/ASP/2006/28919

Received: 25 February 2005

Accepted: 26 August 2005

Published: 9 March 2006

Abstract

Real-time packet video transmission over wireless networks is expected to experience bursty packet losses that can cause substantial degradation to the transmitted video quality. In wireless networks, channel state information is hard to obtain in a reliable and timely manner due to the rapid change of wireless environments. However, the source motion information is always available and can be obtained easily and accurately from video sequences. Therefore, in this paper, we propose a novel cross-layer framework that exploits only the motion information inherent in video sequences and efficiently combines a packetization scheme, a cross-layer forward error correction (FEC)-based unequal error protection (UEP) scheme, an intracoding rate selection scheme as well as a novel intraframe interleaving scheme. Our objective and subjective results demonstrate that the proposed approach is very effective in dealing with the bursty packet losses occurring on wireless networks without incurring any additional implementation complexity or delay. Thus, the simplicity of our proposed system has important implications for the implementation of a practical real-time video transmission system.

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Authors’ Affiliations

(1)
Department of Electrical and Computer Engineering, University of California
(2)
Department of Computer Science and Engineering, Wright State University
(3)
Department of Electrical and Computer Engineering, University of Miami

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Copyright

© Qu et al. 2006