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Open Access research that challenges the mind...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including those from the School of Psychological Sciences & Health - but also papers by researchers based within the Faculties of Science, Engineering, Humanities & Social Sciences, and from the Strathclyde Business School.

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Influence of channel fluctuations on optimal real-time scalable image transmission

Stankovic, V. and Hamzaoui, R. and Saupe, D. (2003) Influence of channel fluctuations on optimal real-time scalable image transmission. In: IEEE International Conference on Image Processing, 2003-09-14 - 2003-09-17.

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Abstract

Joint source-channel coding systems using scalable source codes and forward error correction allow reliable transmission of multimedia data over noisy channels. The performance of such systems highly depends on the source-channel bit allocation strategy. Rate-based error protection schemes, which maximize the expected source rate are very attractive for real-time applications because the optimization call be done very quickly and is independent of the source. In real-world communication, charnel conditions are varying in time. Thus, it is important to frequently update the error protection. For two state-of-the-art joint source-channel coding systems, we show that a charnel mismatch call lead to a poor performance. We study theoretically and experimentally the dependency of a rate-based optimal protection oil the channel statistics and provide an efficient strategy for adjusting the error protection when a channel mismatch occurs.