The domestic urban rail transit construction has been popularized from the first-tier cities to the second-tier cities in the past ten years. Not only is the north-east Guangzhou-Shenzhen urban rail transit operating mileage exceeding 1,500 km, all the eastern capitals have been completed with metro lines and dozens more It is estimated that more than 70 rail lines will be newly built by 2020 in the planning and construction of urban rail lines in the prefecture-level cities in the east and the capital cities in the west of China. By then, there will be more than 100 rail transit lanes in the country with an operating mileage of over 10,000 km. Video surveillance system in urban rail transit is an important guarantee system for operation and public security. In recent years, it has shown new characteristics. The system presents high-definition digital trends. Since the first subway operation in China, video surveillance technology has gone through three development cycles: from analog networking to DVR-based digital networking and today's all-digital networking. The video surveillance system is divided into two main vertical systems of operation and security according to the business, that is, the needs of the subway operators to meet the needs of the subway operation and the security needs of the public security for the public security environment of the subway stations and subway cars. For this business vertical division, different cities have different approaches, mainly the construction of a unified construction, separate use of construction and construction, respectively, two modes of resource sharing; Video surveillance and integrated rail transit management system integration. Unlike the early analog systems, video surveillance systems based on digital network technology can exchange data and integrate services with other computer software service platforms based on communication protocols. Therefore, in some urban rail transit systems, CCTV The system exists as a component of Integrated Surveillance System (ISCS). CCTV provides basic video resources to other ISCS systems such as SCADA, loop control, fire door, fire protection and security without setting up an independent monitoring terminal.
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