Implementation of dynamic service aggregation for interactive video delivery

Prithwish Basu; Ashok Narayanan; Rajesh Krishnan; Thomas D.C. Little

doi:10.1117/12.298433

29 December 1997 Implementation of dynamic service aggregation for interactive video delivery

Prithwish Basu, Ashok Narayanan, Rajesh Krishnan, Thomas D.C. Little

Proceedings Volume 3310, Multimedia Computing and Networking 1998; (1997) https://doi.org/10.1117/12.298433
Event: Photonics West '98 Electronic Imaging, 1998, San Jose, CA, United States

Abstract

Conventional video-on-demand (VoD) servers providing VCR-like interactivity allocate a separate channel for each user. Various schemes have been proposed for aggregating users into groups to improve resource utilization. By bridging the temporal skew between users viewing the same content, multiple users can be served from a single channel. Dynamic aggregation techniques such as rate adaptation and content insertion attempt to optimize resource utilization on-the-fly, thus improving their performance in interactive situations. In this paper, we describe a VoD system which delivers continuous media content to multiple clients using dynamic service aggregation to reduce bandwidth requirements. MPEG-1 system streams are used as the content format and IP multicast is used for video delivery. To the best of our knowledge, we are the first to demonstrate the viability of dynamic service aggregation using rate-adaptive merging in a VoD system. We present our experiences with building the system and address some important issues relating to aggregation in video servers including server directed channel switching in the client and stream merging by acceleration. We show simulations of our clustering and merging algorithms for large user populations and report the piggybacking of over 2.5 users on average per physical channel.

Citation Download Citation

Prithwish Basu, Ashok Narayanan, Rajesh Krishnan, and Thomas D.C. Little "Implementation of dynamic service aggregation for interactive video delivery", Proc. SPIE 3310, Multimedia Computing and Networking 1998, (29 December 1997); https://doi.org/10.1117/12.298433

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