| CCTV System has past three different developed steps from Complete Simulation Tech., semi-Digital Tech. to Digital Tech. Digital CCTV System adopts embedded multi-mission in time control system, which means it has assembled video-constrict and transport process functions. The Digital video signal from the camera is compressed by the high-performance constricted micro-chips, and then transfer to the network through inside-processing, and finally realizes functions of "data, audio, video" triplex networks into one form and the video to desktop, to give the technical supports on Expressway's control and management.Expressway is the high-speed transportation facilities of a kind of modernization and different with the city road. Expressway has many Characteristics, such as route longer (from several ten kilometers arrive several 100 kilometer), locate the strange mountain area or mound the district, nature the environment bad, have long distance between each management station etc. In convenience of in the management, therefore dependable, efficiently supervise and control has become most important to the system.The Mianyang-Guangyuan Expressway , whole line long 135.5 kilometer, has many monitoring & control points ,and the deliver distance is longer. It means higher difficulty to the expressway's transportation & control system on the other side of the innovation in its structure.This article researches on network digital CCTV System, which connected with the whole process from system architecture design, project implement, and system implementation on the network digital CCTV System of Mianyang-Guangyuan Expressway TSC, CS, TC systems project. Aim at the special situation and demands on the project, this article has analyzed and designed the video collecting, video transportation and control process. Specially, to use the special function focus on following aspects: based on SDH&MSTP... |
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