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A Collaborative Transcoding Strategy for Live Broadcasting Over Peer-to-Peer IPTV Networks

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4 Author(s)
Jui-Chieh Wu ; Grad. Inst. of Comput. Sci. & Inf. Eng., Nat. Taiwan Univ., Taipei, Taiwan ; Polly Huang ; Yao, J.J. ; Chen, H.H.

Real-time video transcoding that is often needed for robust video broadcasting over heterogeneous networks is not supported in most existing devices. To address this problem, we propose a collaborative strategy that leverages the peering architecture of peer-to-peer Internet protocol television networks and makes the computational resources of peers sharable. The video transcoding task is distributed among the peers and completed collaboratively. A prototype of the live video broadcasting system is evaluated over a 100-node testbed on the PlanetLab. The experimental results show that the proposed strategy works effectively even when the majority of the peers have limited computational resource and bandwidth.

Published in:

Circuits and Systems for Video Technology, IEEE Transactions on  (Volume:21 ,  Issue: 2 )