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Opportunistic network coding for video streaming over wireless

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2 Author(s)
Seferoglu, H. ; Electrical Engineering and Computer Science Dept. University of California, Irvine, USA ; Markopoulou, A.

In this paper, we study video streaming over wireless networks with network coding capabilities. We build upon recent work, which demonstrated that network coding can increase throughput over a broadcast medium, by mixing packets from different flows into a single packet, thus increasing the information content per transmission. Our key insight is that, when the transmitted flows are video streams, network codes should be selected so as to maximize not only the network throughput but also the video quality. We propose video-aware opportunistic network coding schemes that take into account both aspects, namely (i) the decodability of network codes by several receivers and (ii) the distortion values and playout deadlines of video packets. Simulation results show that our schemes significantly improve both video quality and throughput.

Published in:

Packet Video 2007

Date of Conference:

12-13 Nov. 2007

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