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Wireless Multi-party video conferencing with network coding

In this paper, we propose a cost-effective scheme for robust wireless multi-party video conferencing based on network coding (NC). The main idea is the adoption of a NC scheme to enhance robust transmission, to simplify the erasure protection procedure, and to reduce the downlink bandwidth by leveraging the properties of opportunistic NC and wireless broadcasting. We design a pipelining schedule to meet the delay requirement for real-time video conferencing. The proposed NC method outperforms the opportunistic network coding method by a significant margin and reduces the downlink bandwidth of the overall video bit rate.