Video on demand over ATM: constant-rate transmission and transport

  • Authors:

  • Jean M. McManus;Keith W. Ross

  • Affiliations:

  • Department of Systems Engineering, University of Pennsylvania, Philadelphia, PA;Department of Systems Engineering, University of Pennsylvania, Philadelphia, PA

  • Venue:
  • INFOCOM'96 Proceedings of the Fifteenth annual joint conference of the IEEE computer and communications societies conference on The conference on computer communications - Volume 3
  • Year:
  • 1996

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Abstract

We introduce a specific transport and transmission scheme for Video-on-Demand called constantrate transmission and transport (CRTT). CRTT establishes a CBR virtual channel between the video provider and the viewer's set-top box, and then transmits cells from the provider inlo this channel at a constant rate. Since we assume that the number of cells in a frame is variable, CRTT requires that some number of cells be built up in a set-top box buffer before the commencement of playback. The build up, cell transmissaon rate, and the set-top memory size must be chosen so that there is no starvation or overflow at the set-top box. We develop fundamental relationships between these parameters for viable CRTT. We then apply the theory to an MPEG encoding of Star Wars and find that the minimal set-top box memory for CRTT is 23 Mbytes. We also consider varying the constant rate over a small number of intervals. We find, for example, that for Star Wars approximately 2 Mbytes of set-top memory sufices with 32 constantrate intervals.