Video transport over wireless channels: A cycle-based approach for rate control

Mohamed Hassan, Luigi Atzori, Marwan Krunz

Research output: Chapter in Book/Report/Conference proceedingConference contribution

13 Scopus citations

Abstract

We propose a novel source-rate control scheme for streaming video over wireless channels. This scheme is designed to maximize the bit rate at the encoder while guaranteeing an upper bound on the probability of starvation at the playback buffer. Channel dynamics are captured using the Gilbert-Elliot model, with alternating good and bad periods. In contrast to previous approaches, rate control in our scheme is performed adaptively on a per-cycle basis, where a cycle consists of one good period and the ensuing bad period. The cycle-based approach has two advantages. First, it reduces the fluctuations in the source bit rate, ensuring smooth variations in video quality and avoiding the "saw" effect that is typically observed in frame-by-frame rate control. Second, it makes it possible to derive a closed-form expression for the starvation probability, which we use to determine the optimal source bit rates for the good and bad periods of the following cycle. Because of its low computational complexity, the proposed scheme is attractive for real-time video streaming. Simulations are carried out to assess the performance of the scheme and study the interactions among various system parameters.

Original languageEnglish (US)
Title of host publicationACM Multimedia 2004 - proceedings of the 12th ACM International Conference on Multimedia
Pages916-923
Number of pages8
StatePublished - Dec 1 2004
EventACM Multimedia 2004 - proceedings of the 12th ACM International Conference on Multimedia - New York, NY, United States
Duration: Oct 10 2004Oct 16 2004

Publication series

NameACM Multimedia 2004 - proceedings of the 12th ACM International Conference on Multimedia

Other

OtherACM Multimedia 2004 - proceedings of the 12th ACM International Conference on Multimedia
CountryUnited States
CityNew York, NY
Period10/10/0410/16/04

Keywords

  • Adaptive FEC
  • Channel-code optimization
  • Playback buffer control
  • Source rate control
  • Wireless channels

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Hassan, M., Atzori, L., & Krunz, M. (2004). Video transport over wireless channels: A cycle-based approach for rate control. In ACM Multimedia 2004 - proceedings of the 12th ACM International Conference on Multimedia (pp. 916-923). (ACM Multimedia 2004 - proceedings of the 12th ACM International Conference on Multimedia).