The Application And Research Of SIP Based On IP-TV Video Terminal

Along with the network technology and the multimedia technical unceasing development, the multimedia communication service occupies the dominant position gradually in the Internet application, by video communication technology application outstandingly. The video communication is continuously, the dynamic visual communication, has the information content in a big way, the transmission band width is high, to the network performance requirement higher characteristic. The video communication service will be the future wired and in the wireless network one of load bearing primary services.This article mainly analyzed and has compared two kind of correspondences controlling agreement which in the real-time video communication system used generally: SIP and H.323. Proposed the SIP agreement has the structure succinct, is easy to expand and to be suitable for Internet to turn on and so on the good characteristic, and thought soon becomes the next generation network exchange technology in the soft exchange technology under the big background, SIP may effectively control the media gateway, controls the terminal call, may take the soft exchange technology turns on the level the core agreement, and will succeed applies in many telecommunication operations business representative system viewpoint. And constructed had the function of the SIP User Agent to the video frequency terminal. Through to the SIP agreement stack realization, confirmed SIP to call and to establish the data-transmission channel in the establishment the validity.This article elaborated with emphasis based on the digital set-top box SIP video frequency terminal realization, including SIP agreement stack realization, call user's analysis, RTP data channel establishment, SIP network and other networks interconnections. At the same time introduced takes the video frequency terminal the digital set-top box structure, the related chip content. Elaborated the SIP agreement feasibility, but also introduced the media processor and its the operating system, the software reference frame. Based on the above content, the this article concrete frame is: In first chapter introduced first the video communication system development application, the portal frame construction and the digital set-top box related technology as well as the hardware constitution, has outlined author's research work. Second chapter mainly has analyzed the SIP agreement structure and the related agreement. In third chapter how in detail elaborated the SIP agreement stack on the...