Networking

Joint Decoding of Multiple-Description Network-Coded Data

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Executive Summary

This paper considers a transmission scheme combining Multiple Description Coding (MDC) and Network Coding (NC). The authors' aim is to benefit from the property of MDC to provide progressive quality improvement with the number of received packets and from the efficient use of network resources provided by NC. MDC is performed either via frame expansion (NC-MDC-F) or via correlating transform (NC-MDC-T). With NC-MDC-F, when not enough NC has been received, reconstruction may be done via Mixed Integer Quadratic Programming (MIQP). With NCMDC- T, the reconstruction involves simple Gaussian elimination. In both cases, a good robustness to missing NC packets is observed. When the number of missing packets is small, NCMDC- F provides better SNR thanks to a reduction of a part of the quantization noise.

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