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1 Division Télécoms et réseaux L2S - Laboratoire des signaux et systèmes, LTCI - Laboratoire Traitement et Communication de l-Information 2 L2S - Laboratoire des signaux et systèmes 3 Division Télécoms et réseaux L2S - Laboratoire des signaux et systèmes, IUF - Institut Universitaire de France, LTCI - Laboratoire Traitement et Communication de l-Information 4 LTCI - Laboratoire Traitement et Communication de l-Information 5 LRI - Laboratoire de Recherche en Informatique

Abstract : This paper considers a multicast scenario and compares the average reception quality obtained when combining multiple description coding MDC and network coding NC. Plain single description network coding NC-SDC serves as reference. In the considered scenario, a single source is multicast to several receivers with various channel conditions. Contrary to a NC-SDC scheme, unable to recover the coded packets when not enough combinations of packets have been received, NC of MDC packets allows a more progressive quality improvement with the number of received packets, and a reduction of the effect of the quantization noise when MDC is performed via frame expansion before quantization. Considering a probability distribution for the bit transition probability during transmission to any user in the multicast group, the expected signal-to-noise ratio is evaluated. Performance comparisons are made for various error distributions, field sizes, and MDC methods via frame expansion and correlating transform.





Autor: Hamlet Jesse Medina-Ruiz - Lana Iwaza - Michel Kieffer - Beatrice Pesquet-Popescu - Khaldoun Al Agha -

Fuente: https://hal.archives-ouvertes.fr/



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