An Interactive Telelecture System with Hybrid ATM/IP Networking

Authors:
Jörg Liebeherr;Steven R. Brown;Rick Albertson
Affiliations:
Department of Computer Science, University of Virginia, Charlottesville, VA 22903, USA. jorg@cs.virginia.edu;Department of Computer Science, University of Virginia, Charlottesville, VA 22903, USA. srb8d@cs.virginia.edu;Litton Network Access Systems, Roanoke, Virginia 24012, USA. rea@netaccsys.com
Venue:
Multimedia Tools and Applications
Year:
2000

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Abstract

Currently, there is much debate whether ATM (AsynchronousTransfer Mode) or IP (Internet Protocol) is the betterinternetworking technology for multiparty multimedia applications.Proponents of ATM argue that only a connection-oriented network cansatisfy the stringent timeliness requirements of high-quality audioand video data. Proponents of the Internet emphasize the scalabilityand flexibility of connectionless networking. In this paper amultiparty multimedia telelecture system, called DistanceLearning Controller (DLC), is presented that uses both ATM and IP,thus, attempting to exploit the advantages of both technologies,without suffering the drawbacks of either technology. The DLC systemuses ATM for transmission of broadcast-quality video and CD-qualityaudio, and IP-over-ATM for low-bandwidth applications and conferencecontrol functions. This paper describes the hardware and softwarecomponents of the DLC system.