With the continuous development of safe city infrastructure and the growth of science and technology, the “social security dynamic video surveillance system” will be built into a set of measures to combat and prevent illegal crimes, at all levels of government, complex places, key areas and major streets. Video surveillance points will be set in places such as communities, places of worship, entertainment venues, multi-segmented areas, important intersections, stations, and terminals. This footage will be transmitted to public security organizations and communities. The browsing, recording and other methods of video transmissions enable public security organizations, communities and other relevant functional departments at all levels to intuitively understand and master the security trends in the surveillance area and effectively improve the video surveillance system of social security management. After the completion of the "high-definition monitoring system" as one of the effective ways of public security information management, the intensity, extent and breadth of its construction will improve the unified command, rapid response and coordinated combat level of public security management to a significant extent.
According to video surveillance specifications and guiding principles, combined with actual requirements, the system adopts three arrangements: “Public Security Network SDI Video System, Public Security Network Digital Video System, and Government Affairs Network Digital Video System”.
After the high-end optical fiber signal enters the public security bureau, the incoming optical signal will be divided into two parts by a passive splitter (the ratio of output power of the splitter is 1:1). One of the optical signals enters the integrated service platform for encoding. It then enters the public security network for storage and on-line viewing (which is controllable). The other optical signal enters another integrated service platform for encoding. This signal then enters the digital governmental affairs network video system for online viewing (which is not controllable). These signals can be adjusted according to security needs in later stages to include the length of storage time and the storage capacity.