Design and analysis of a video-demand system

Pao Yue-kong Library Electronic Theses Database

Design and analysis of a video-demand system

 

Author: Chan, Kam-chau Tony
Title: Design and analysis of a video-demand system
Degree: M.Sc.
Year: 1997
Subject: Interactive multimedia
Hong Kong Polytechnic University -- Dissertations
Department: Multi-disciplinary Studies
Pages: iv, 58 leaves : ill. ; 30 cm
Language: English
InnoPac Record: http://library.polyu.edu.hk/record=b1403588
URI: http://theses.lib.polyu.edu.hk/handle/200/2431
Abstract: Recent advances in information and communication technologies have made multimedia-on-demand service, such as video-on-demand and home shopping, feasible. An interactive video-on-demand system allows users to access video services interactively on broadband networks. The nature of the service requires massive amounts of storage and bandwidth to be supplied from a video server located within the network. Due to the limitation of the I/O bandwidth of the storage media, the video server can only serve a restricted amount of concurrent users. In order to overcome that limitation, a new video-on-demand system using datacycle architecture is proposed. Theoretically, a datacycle architecture scales to achieve very high levels of throughput. For applications that are retrieve-only, like video-on-demand system, the number of simultaneous requests that can be made of the database is essentially unlimited. In order to provide a non-stop video display, different approaches of video data transmission scheduling have been studied. Results indicate that the horizontal interleaved broadcast delivery produces the best performance among the others. By means of suitable extraction and transmission methods of video data, the VCR-like features, such as pause, fast-forward and fast-rewind functions, can be achieved without additional resources. Lastly, through suitable selection of design parameters of the system, buffer size can be minimized to a certain extent that only a few hundred bytes per user is required.

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