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Video communication and media scaling system “Xnetvideo”: Design and implementation

  • Robert Hess
  • Tino Hutschenreuther
  • Alexander Schill
Session 5: Multimedia Networking & Transport
Part of the Lecture Notes in Computer Science book series (LNCS, volume 1045)

Abstract

Today's networks are characterized by heterogeneous environments. Various transmission techniques coexist and offer different bandwidths at different costs. For example, it is possible to transmit 155 Mbps and more with the Asynchronous Transfer Mode (ATM). As opposed to that, most LANs are based on Ethernet links, which allow only a 10 Mbps transfer rate. The major problem of multimedia communication systems is the lack of resource reservation protocols such as RSVP in current practical environments. Scaling of media streams is a current possibility and trade-off to meet the needs of the end user, to prevent the waste of bandwidth and to react onto phases of low available bandwidth.

This paper presents the approach and architecture of the video communication system “Xnetvideo”, which is scaleable in terms of SNR (signal to noise ratio)-scaling, image size and frame rate. The description of this architecture, and the discussion of implementation issues and performance results are the major topics of this contribution. As a networking basis, we assume a heterogeneous environment, where shared media are included, so that no reservation possibilities are available in this case; in practice, both ATM and Ethernet are used in our lab.

Keywords

scaling scaleable media-streams multimedia video conferencing client/server 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1996

Authors and Affiliations

  • Robert Hess
    • 1
  • Tino Hutschenreuther
    • 1
  • Alexander Schill
    • 1
  1. 1.Dresden University of TechnologyGermany

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