Reducing bandwidth requirement for delivering video over wide area networks with proxy server

W. H. Ma, D. H.C. Du

Research output: Contribution to conferencePaperpeer-review

28 Scopus citations

Abstract

Due to the high bandwidth requirement and rate variability of compressed video, delivering video across wide area networks (WANs) is a challenging issue. Proxy servers are used to cache passing data to reduce the congestion and to improve client access time on the Internet. In this paper, we investigate ways to store or stage partial video in the proxy servers to reduce the network bandwidth requirement over WAN. A client needs to access a portion of the video from a proxy server over local area network (LAN) and the rest from a central server across WAN. Therefore, the client buffer requirement and video synchronization are to be considered. We study the tradeoffs between client buffer, storage requirement on the proxy server, and the required rate over WAN for video transport. Given a video delivery rate for WAN, we propose several frame staging selection algorithms to decide which frames of the video are to be stored in the proxy server. A scheme called Chunk Algorithm which partitions a video into different segments (chunks of frames) with alternating chunks stored in the proxy server offers the best tradeoff.

Original languageEnglish (US)
Pages991-994
Number of pages4
StatePublished - Dec 1 2000
Event2000 IEEE International Conference on Multimedia and Expo (ICME 2000) - New York, NY, United States
Duration: Jul 30 2000Aug 2 2000

Other

Other2000 IEEE International Conference on Multimedia and Expo (ICME 2000)
CountryUnited States
CityNew York, NY
Period7/30/008/2/00

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