Columbia‘s VoD and Multimedia Research Testbed withHeterogeneous Network Support

  • Authors:

  • Shih-Fu Chang;Alexandros Eleftheriadis;Dimitris Anastassiou;Stephen Jacobs;Hari Kalva;Javier Zamora

  • Affiliations:

  • Image and Advanced Television Laboratory, Department of Electrical Engineering, Columbia University, New York, NY 10027, USA;Image and Advanced Television Laboratory, Department of Electrical Engineering, Columbia University, New York, NY 10027, USA;Image and Advanced Television Laboratory, Department of Electrical Engineering, Columbia University, New York, NY 10027, USA;Image and Advanced Television Laboratory, Department of Electrical Engineering, Columbia University, New York, NY 10027, USA;Image and Advanced Television Laboratory, Department of Electrical Engineering, Columbia University, New York, NY 10027, USA;Image and Advanced Television Laboratory, Department of Electrical Engineering, Columbia University, New York, NY 10027, USA

  • Venue:
  • Multimedia Tools and Applications
  • Year:
  • 1997

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Abstract

This paper reports our progress in developing an advancedvideo-on-demand (VoD) testbed, which will be used to accommodatevarious multimedia research and applications such as Electronic Newson Demand, Columbia‘s Video Course Network, and Digital Libraries. Thetestbed supports delivery of MPEG-2 audio/video stored as transportstreams over various types of networks, e.g., ATM, Ethernet, andwireless. Both software and hardware video encoders/decoders are usedin the testbed. A real-time video pump and a distributed applicationcontrol protocol (MPEG-2‘s DSM-CC) have been incorporated. Hardwaredecoders and set-tops are being used to test wide-area videointeroperability. Our VoD testbed also provides an advanced platformfor implementing proof-of-concept prototypes of related research. Ourcurrent research focus covers video transmission with heterogeneousquality-of-service (QoS) provision, variable bitrate (VBR) trafficmodeling, VBR server scheduling, video over Internet, and videotransmission over IP-ATM hybrid networks. An important aim is toenhance interoperability. Accommodation of practical multimediaapplications and interoperability testing with external VoD systemshas also been undertaken.