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Proceedings Paper

Video multicast over wireless mesh networks with scalable video coding (SVC)
Author(s): Xiaoqing Zhu; Thomas Schierl; Thomas Wiegand; Bernd Girod
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Paper Abstract

We address the problem of rate allocation for video multicast over wireless mesh networks. An optimization framework is established to incorporate the effects of heterogeneity in wireless link capacities, traffic contention among neighboring links and different video distortion-rate (DR) characteristics. We present a distributed rate allocation scheme with the goal of minimizing total video distortion of all peers without excessive network utilization. The scheme relies on cross-layer information exchange between the MAC and application layers. It adopts the scalable video coding (SVC) extensions of H.264/AVC for video rate adaptation, so that graceful quality reduction can be achieved at intermediate nodes within each multicast tree. The performance of the proposed scheme is compared with a heuristic scheme based on TCP-Friendly Rate Control (TFRC) for individual peers. Network simulation results show that the proposed scheme tends to allocate higher rates for peers experiencing higher link speeds, leading to higher overall video quality than the TFRC-based heuristic scheme.

Paper Details

Date Published: 28 January 2008
PDF: 8 pages
Proc. SPIE 6822, Visual Communications and Image Processing 2008, 682205 (28 January 2008); doi: 10.1117/12.767956
Show Author Affiliations
Xiaoqing Zhu, Stanford Univ. (United States)
Thomas Schierl, Fraunhofer HHI - Heinrich Hertz Institut (Germany)
Thomas Wiegand, Fraunhofer HHI - Heinrich Hertz Institut (Germany)
Bernd Girod, Stanford Univ. (United States)

Published in SPIE Proceedings Vol. 6822:
Visual Communications and Image Processing 2008
William A. Pearlman; John W. Woods; Ligang Lu, Editor(s)

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