Video multicast over wireless mesh networks with scalable video coding (SVC) | Zendy

Xiaoqing Zhu | Zendy; Thomas Schierl | Zendy; Thomas Wiegand | Zendy; Bernd Girod | Zendy

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Video multicast over wireless mesh networks with scalable video coding (SVC)

Author(s) -

Xiaoqing Zhu,

Thomas Schierl,

Thomas Wiegand,

Bernd Girod

Publication year - 2007

Publication title -

proceedings of spie, the international society for optical engineering/proceedings of spie

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.192

H-Index - 176

eISSN - 1996-756X

pISSN - 0277-786X

DOI - 10.1117/12.767956

Subject(s) - multicast , computer science , computer network , scalable video coding , video quality , scalability , wireless mesh network , source specific multicast , real time computing , heuristic , linear network coding , wireless network , wireless , distributed computing , network packet , telecommunications , metric (unit) , operations management , database , artificial intelligence , economics

We address the problem of rate allocation for video multicast over wireless mesh networks. An optimization framework is established to incorporate the eects of heterogeneity in wireless link capacities, trac contention among neighboring links and dierent,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. Keywords: wireless mesh network, video multicast, scalable video coding (SVC), distributed rate allocation

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