Real-time media distribution over the Internet poses several challenging problems due to its stringent delay/loss requirements and complex network dynamics. A promising approach to alleviate the severe impacts of these dynamics is to simultaneously transmit the media from multiple servers. For such a scenario, we present a client-driven rate-distortion optimized packet scheduling method that selects which packet(s) to be requested from which server(s) at a given request opportunity. In doing so, our goal is not only to attain the maximal presentation quality but also to conform to the rate constraints dictated by the TCP-friendly flow, window and congestion control
mechanisms. We provide the simulation results for an extensive range of scenarios to demonstrate the efficacy of the proposed algorithm.m the selection of a particular pulse-shaping filter.

Speaker:	Ali Cengiz Begen
Title:	Rate-Distortion Optimized Media Streaming with Server Diversity
Date:	November 21, 2003
Time:	3:00 pm
Location:	GCATT Room 325
Abstract:	Real-time media distribution over the Internet poses several challenging problems due to its stringent delay/loss requirements and complex network dynamics. A promising approach to alleviate the severe impacts of these dynamics is to simultaneously transmit the media from multiple servers. For such a scenario, we present a client-driven rate-distortion optimized packet scheduling method that selects which packet(s) to be requested from which server(s) at a given request opportunity. In doing so, our goal is not only to attain the maximal presentation quality but also to conform to the rate constraints dictated by the TCP-friendly flow, window and congestion control mechanisms. We provide the simulation results for an extensive range of scenarios to demonstrate the efficacy of the proposed algorithm.m the selection of a particular pulse-shaping filter.
Biography:	Ali C. Begen received his B.S. degree in Electrical and Electronics Engineering from Bilkent University, Ankara, Turkey, in 2001, and the M.S. degree in Electrical and Computer Engineering from the Georgia Institute of Technology, Atlanta, GA, in 2002. Currently, he is pursuing his Ph.D. degree at Georgia Tech under the supervision of Prof. Yucel Altunbasak. His research areas include media delivery over wireline and wireless networks, multimedia transport protocols, content distribution and error-resilient video coding. Ali C. Begen is a student member of the IEEE and ACM, IEEE Communications and Signal Processing Societies. Since 2002, he also serves on the IEEE Signal Processing Society Image and Multidimensional Signal Processing Technical Committee as the Webmaster. In 2003, he received the best student-paper award at the IEEE Int. Conf. Image Processing (ICIP), Barcelona, Spain.
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