ABSTRACT:Date: February 2, 1996 Time: 10:00 am Place: Room 414 Schapiro Research Building (CEPSR)
Present day technologies offer an increasing number and diversity of multimedia applications, network configurations and end-system architectures. However, this very diversity continually sets back the opportunities available from true open systems working. Satisfying the disparate Quality of Service (QoS) requirements of heterogeneous receivers in a multipeer communications environment is a key goal of our research.
In this talk we discuss and present results of our current work on QoS filter mechanisms which operate on compressed video and audio streams. These filter mechanisms adapt the QoS of continuous media streams allowing diverse qualities of media to be delivered to a number of receivers in the same multipeer dissemination tree. The talk focuses particularly on filter operations applied to bandwidth-demanding video services in order to allow low capability clients, primarily connected via mobile and other low-bandwidth links, to participate in these dissemination services. This is performed without detriment to existing high capability clients. The results presented show the feasibility of providing individual QoS to individual clients.
Doug Shepherd is the Director of IT, a Professor in Computing and co-founder of the Distributed Multimedia Research Group at Lancaster University, England. He has been working in the field of computer communications and distributed computing for over ten years and as published extensively. Recently he was a visiting Professor with the Tenet Group at UCB.
Contact: Andrew T. Campbell (campbell@ctr.columbia.edu)