Multiple Description Source Coding and Diversity Routing: a Joint Source Channel Coding Approach to Real-time Services over Dense Networks
نویسندگان
چکیده
We investigate the interaction of the source coding mechanism and the transport mechanism for real time data packet transmission over dense networks. We show that single path routing does not make efficient use of network capacity whereas multi path routing techniques do (Proposition 1 and 2). We then consider the interaction of single versus multiple description source coding with single versus multi path routing. The most sophisticated scheme (multiple descriptions source coding and multi path routing) performs significantly better that the usual single path and single description scheme. This improvement is more remarkable in the case of low rates and shorter maximum allowed delay (about 18 dB in the best case).
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