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Journal of Information Science and Engineering, Vol.19 No.3, pp.531-549 (May 2003)

Adaptive Live Broadcasting for Highly-Demand Video*

Hung-Cang Yang, Hsing-Fu Yu and Li-Ming Tseng
Distributed System Laboratory
Department of Computer Science and Information Engineering
Naitonal Central University
Chungli, 320 Taiwan
E-mail: {cyht; yu}

With the growth of broadband networks, Video-on-Demand (VoD) has become realistic. Many significant broadcasting schemes have been proposed to reduce the bandwidth requirements for stored popular videos, but they cannot be used to support live video broadcast perfectly. Herein, we propose a new broadcasting scheme, called the Adaptive Live Broadcasting (ALB) scheme, which supports live video broadcasting and performs well over a wide range of request arrival rates. From our analysis and comparison, we find that our ALB scheme is suitable for broadcasting live video. It has several significant advantages: (1) It has the shortest maximum waiting time with fixed channels. (2) It has the lowest maximum I/O transfer requirements with a fixed maximum waiting time at the client end. A simulation is employed to evaluate several live broadcasting schemes: UD, ST, AFB and ALB. The results reveal that our ALB scheme consumes the least server bandwidth.

Keywords: adaptive live broadcasting scheme, network bandwidth scheduling, popular video service, video-on-demand (VoD), multimedia systems

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Received May 15, 2002; accepted July 25, 2002.
Communicated by Biing-Feng Wang, Stephan Olariu and Gen-Huey Chen.
*The work was suppported in part by a reserach grant from the National Science Council fo the ROC under contract number NSC 90-2213-E-008-049. A preliminary version of the paper was presented at the 2002 International Conference on Parallel and Distributed Systems, Chungli, Taiwan.