MD/PNC with feedback for heterogeneous video multicast in lossy networks
Adarsh K. Ramasubramonian, John W. Woods · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2010
The users that take part in a video multicast session often have different bandwidth capabilities, and also experience different loss rates in the network. The process of delivering video to these receivers appropriate to their available bandwidth is called heterogeneous multicast. We present a solution for this problem based on the combination of multiple description coding and network coding. The receivers feed back information on the number of linearly independent descriptions that they obtain, and this is used to optimize the rate allocation of multiple descriptions. Our simulations show significant improvement in performance compared to unirate multicast that uses network coding. Unlike the case for unirate multicast, users with higher bandwidth receive higher quality video with MD/PNC.