A traffic model for MPEG-coded VBR streams

Marwan M Krunz, Herman Hughes

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

67 Scopus citations

Abstract

Compression of digital video is the only viable means to transport real-time full-motion video over BISDN/ATM networks. Traffic streams generated by video compressors exhibit complicated patterns which vary from one compression scheme to another. In this paper we investigate the trafficcharacteristics of video streams which are compressed based on the MPEG standard. Our study is based on 23 minutes of video obtained from an entertainment movie. A particular significance of our data is that it contains all types of coded frames, namely: Intra-coded (I), Prediction (P), and Bidirectional (B) MPEG frames. We describe the statistical behavior of the VBR stream using histograms and autocorrelation functions. A procedure is developed to determine the instants of a scene change based on the changes in the size of successive/frames. It is found that the length of a scene can be modeled by a geometric distribution. A model for an MPEG traffic source is developed in which frames are generated according to the compression pattern of the captured video stream. For each frame type, the number of cells per frame is fitted by a lognormal distribution whose parameters are determined by the frame type. The appropriateness and limitations of the model are examined by studying the multiplexing performance of MPEG streams. Simulations of an ATM multiplexer are conducted, in which traffic sources are derived from the measured VBR trace as well as the proposed model. The queueing performance in both cases is found to be relatively close.

Original languageEnglish (US)
Title of host publicationProceedings of the 1995 ACM SIGMETRICS Joint International Conference on Measurement and Modeling of Computer Systems, SIGMETRICS 1995/PERFORMANCE 1995
PublisherAssociation for Computing Machinery, Inc
Pages47-55
Number of pages9
ISBN (Electronic)0897916956, 9780897916950
DOIs
StatePublished - May 1 1995
Externally publishedYes
Event1995 ACM SIGMETRICS Joint International Conference on Measurement and Modeling of Computer Systems, SIGMETRICS 1995/PERFORMANCE 1995 - Ottawa, Canada
Duration: May 15 1995May 19 1995

Other

Other1995 ACM SIGMETRICS Joint International Conference on Measurement and Modeling of Computer Systems, SIGMETRICS 1995/PERFORMANCE 1995
CountryCanada
CityOttawa
Period5/15/955/19/95

ASJC Scopus subject areas

  • Hardware and Architecture
  • Software
  • Computer Networks and Communications
  • Computational Theory and Mathematics

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    Krunz, M. M., & Hughes, H. (1995). A traffic model for MPEG-coded VBR streams. In Proceedings of the 1995 ACM SIGMETRICS Joint International Conference on Measurement and Modeling of Computer Systems, SIGMETRICS 1995/PERFORMANCE 1995 (pp. 47-55). Association for Computing Machinery, Inc. https://doi.org/10.1145/223587.223592