Self SimilarVideo Traffic Carey Williamson Department of Computer Science University of Calgary
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”
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
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
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!