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Self SimilarVideo Traffic

Carey Williamson

Department of Computer ScienceUniversity of Calgary

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Introduction A recent paper (ACM SIGCOMM’94)

has identified the presence of self-similarity in compressed video traffic

Garrett and Willinger, “Analysis, Modeling, and Generation of Self-Similar VBR Video Traffic”

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More Video Measurements Garrett and Willinger studied the

characteristics of compressed video for entertainment-type video traffic (i.e., movies)

The data discussed in their paper is for the movie Star Wars, using a JPEG-like video compression algorithm

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Main Results Video traffic is self-similar Scene changes and level of activity

in scenes have dramatic effect on bit rate

Developed models for video traffic Evaluated effects when multiple

video sources are statistically multiplexed together

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Summary Variable bit rate video traffic forms an

important part of the workload for future high speed ATM networks

Understanding video traffic is important Characterizing and modeling video

sources needed for performance studies

Video traffic can be self-similar too!