Research Of SIP-based VOD System

SIP (Session Initiation Protocol) agreement, as a next-generation network application has a broad prospect. VOD (Video on Demand) is the hot issue of multi-media field, VOD system because of the autonomy of the demand, multimedia forms of visual performance, the market has been widespread concern. It is precisely such a system to meet the needs of a signaling agreement. This article on the SIP-based VOD system to achieve the start of the study.This paper on the SIP on the VOD system in all aspects of technology, especially streaming media technology, media convection of important agreements RTSP agreement was carefully Analysis and Research; studied the features of SIP, network architecture and application of principles, News brief analysis of its mechanism.Secondly, based on SIP protocol VOD system for the overall design, according to an agreement with the RTSP SIP agreement with the relevance of the similarities and differences, are the two design options that combine SIP RTSP programmes and S-VOD (extension of the SIP) programme, Two programme focuses on a study of their respective advantages and disadvantages, according to S-VOD programme of the advantages and prospects, the choice of the programme to study and design. S-VOD programme for the difficulties that the lack of VCR functions, a key design. Design thinking is, according to a SIP has good scalability of this characteristic, its definition of a number of new methods, is designed to achieve VCR functions, namely, play, pause, fast forward and fast retreat. On this basis, the design of the S-VOD system network architecture, and describes the process of its demand.Then, the design features to be realized. Including the use of open source server openSER Construction SIP network servers, using oSIP client protocol stack development and the achievement of SIP modules, and focus on achieving the various functions of a VCR.Finally, the S-VOD system was tested, the test data and the original VOD system were compared and analyzed and summarized S-VOD system advantage.