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A relaxing bandwidth smoothing schedule for transmitting prerecorded VBR video in periodic network

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Abstract

Minimizing the number of bandwidth changes of individual stream and enabling the transmission schedule flexible can benefit increasing the number of concurrent multiplexed streams in periodic network without degrading quality of video. However, minimum change bandwidth allocation (MCBA) only provides a fixed transmission schedule for given video and client buffer although it achieves the minimum number of rate changes and the minimum peak rate. So the MCBA schedule cannot be adjusted when multiple streams are multiplexed over a limited bandwidth shared link. In this paper, we propose a relaxing transmission schedule that provides a range of rates for each interval and preserves the minimum number of rate changes without increasing any rate. As a result, the individual schedule can be adjusted by network service to try to satisfy bandwidth constraint when the total required bandwidth of multiplexed streams exceeds the available network capacity. First, we underline that the key of MCBA is to segment video with making each linear trajectory as long as possible. Then we use linear separability and support vector machine under the classification model to compute the longest interval and the required rate, respectively. Due to our proposed decoupled form between segmentation and rate computation, finally, we construct the relaxing schedule bounded by the original MCBA rate and the minimum rate. The simulation using real MPEG4 and H.264 video traces confirms the philosophy and evaluates the relaxing performance of our proposed algorithm.

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Acknowledgments

The authors would like to thank G. V. der Auwera, P. T. David and M. Reisslein for supplying the MPEG4 and H.264 video traces at http://trace.eas.asu.edu/h264/index.htm. In addition, we appreciate the reviewers for their provided valuable suggestions in revising the paper. This work was supported by National High-Tech Research and Development Program of China (863 Program) under grant no. 2008AA01A317 and National Natural Science Foundation of China under grant no. 60774038.

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Authors and Affiliations

  1. Key Laboratory of Network Communication System and Control, Chinese Academy of Sciences, University of Science and Technology of China, 230027, Hefei, Anhui, China

    Zilei Wang & Hongsheng Xi

  2. Electronic Engineering and Information Science Department, University of Science and Technology of China, 230027, Hefei, Anhui, China

    Guo Wei

Authors
  1. Zilei Wang
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  2. Hongsheng Xi
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  3. Guo Wei
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Correspondence to Zilei Wang.

Additional information

Communicated by Cormac Sreenan.

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Wang, Z., Xi, H. & Wei, G. A relaxing bandwidth smoothing schedule for transmitting prerecorded VBR video in periodic network. Multimedia Systems 16, 151–168 (2010). https://doi.org/10.1007/s00530-010-0181-1

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  • DOI: https://doi.org/10.1007/s00530-010-0181-1

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