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Video surveillance has always been a hot spot in the surveillance field. It is widely used in various industries due to its intuitive, convenient, and rich information content. In recent years, my country’s monitoring and alarm system construction has made great progress in terms of technical level and practical application, and has become an indispensable application system for public security technical defense. In 2009, Bengbu Public Security established the “Safe Bengbu” video surveillance system covering key units, places, crossings, etc. in the city, to strengthen social security supervision and improve the level of social security management with advanced technical prevention methods.
As the product and solution provider for this construction, Keda has adopted the most advanced network video surveillance technology, and built a set for Bengbu that conforms to the actual situation of Bengbu city, meets the needs of public security management, is easy to manage, easy to use, and has powerful functions. The developed video surveillance system has strengthened resource sharing and collaboration among various government functional departments, and improved the actual combat capability and efficiency of public security.
According to the needs of Bengbu city public security prevention, control and management and the business model of public security, the system adopts the architecture of “front-end convergence, cascade deployment of two-level platforms” to meet the access of scattered, wide-ranging and large-scale monitoring resources in the city. , processing, forwarding and storage requirements, the management adopts the structure of “three-level monitoring center, hierarchical and sub-domain management”, which meets the public security business process and management mode, improves the cooperation between the public security subordinates and the subordinates and the rational allocation of police forces, and makes the resources more fully utilized. It is more efficient to receive and deal with the police.
Extensive deployment of monitoring points, the first step in urban public security supervision
The “Safe City” video surveillance system needs to comprehensively consider the needs of public security, transportation, fire protection, urban management and other functional departments, and fully meet the needs of public security prevention and urban management, so the coverage of video information should be as wide as possible. The deployment of front-end monitoring points is set up according to the key points of urban public security, mainly in commercial and financial blocks, communities, entertainment venues, main road sections, transportation hub areas, etc. The control points are mainly equipped with image collection, audio collection and alarm information collection. The video and audio information collected by the front end is encoded and uploaded to the monitoring platform through the network, and is used and managed by the public security.
In response to the construction requirements of the video surveillance system in Bengbu, Keda adopted EPON technology to build a convergence network, deployed OLT in the network convergence equipment room, laid optical fibers to the monitoring front-end, deployed optical splitters on the optical fiber lines, and flexibly connected to each front-end monitoring point. The front-end video encoder is connected to the optical fiber through the ONU to realize the front-end access of “tree branch”, which can effectively save the optical fiber resources, reduce the construction cost, and make the later expansion more convenient. The line equipment adopts passive design, which has strong anti-lightning ability, and also eliminates the trouble of power connection in remote areas.
The deployment of urban security monitoring points not only pays attention to coverage, but also has higher and higher requirements for image quality. In the past, limited by the quality of images, surveillance video was often unable to play a real role in the investigation and collection of evidence for public security criminal investigations. Compared with traditional D1 and CIF formats, HD can provide significantly improved video clarity and video fluency. Taking the current highest level 1080P as an example, its resolution is 1920×1080, and the image clarity is 20 times that of CIF video. It is 5 times that of D1 video, and the frame rate of 1080P can reach 60 frames/second or 60 fields/second, and its fluency is more than 2 times that of D1 and CIF. Using high-definition monitoring can achieve more accurate and efficient video applications. Bengbu Public Security has gradually deployed high-definition surveillance in some key areas to achieve better supervision effects.
With the continuous penetration of the breadth and depth of the deployment of monitoring points, the situation of various parts of the city will be more and more easily controlled by the public security.
Network management, realize resource sharing, liberate police force
The purpose of the construction of the urban public security monitoring system is to let the public security department know the real-time situation of various sensitive areas in the city through images. The system can realize real-time browsing of images and all-weather video recording, and can conveniently call and manage these image resources. Networking is undoubtedly the most convenient way to achieve resource sharing among departments at all levels and the calling and management of image resources.
Bengbu Safe City Video Surveillance System is constructed with a fully networked architecture, which can realize networked transmission of image resources, multi-level networking and hierarchical and domain-based management.
Networked cascading architecture – the system is deployed in a two-level cascading architecture, and a first-level monitoring platform is deployed in the municipal bureau, responsible for the central management, business management, authority authentication and other functions of the entire system, and a second-level monitoring platform is set up in 7 convergence computer rooms , responsible for the aggregation, forwarding, distribution and signaling management of video images in each jurisdiction, complete the management and control functions in this platform, and upload important image data to the first-level platform of the Municipal Public Security Bureau through the network. Public security at all levels can use and manage urban surveillance images by accessing the corresponding surveillance platforms.
Video – One of the biggest features of urban security monitoring is the large amount of information, and the reliable storage of such a huge amount of information is a big problem. The Bengbu city security monitoring system adopts advanced IP SAN storage technology, a storage solution combining distributed storage and centralized storage. The high-level platform is responsible for the storage of monitoring images and alarm videos in key parts of the city. Distributed storage reduces the pressure of central storage and the occupation of central network bandwidth. The combination of centralized storage and distributed storage can back up each other, ensuring reliable storage of key data. The stored video can be queried, downloaded and played back through the network.
Hierarchical and sub-domain management – The system adopts the management structure of “three-level monitoring center, hierarchical and sub-domain management”, and deploys three-level monitoring centers of municipal bureaus, sub-bureaus, and police stations to manage and dispatch urban monitoring resources in a unified manner. The Keda network video surveillance system has powerful management functions and a strict grading and decentralization mechanism. According to the functions of the public security at all levels, different authorities are assigned respectively. The Municipal Public Security Bureau has set up a first-level monitoring center, which has the first-level control authority, and can inspect and control all monitoring points and monitoring resources in the city; the county (district) public security branch (business department) has set up a second-level monitoring center with second-level control. Authority, can inspect and control the monitoring resources of various monitoring points and subordinate units within their jurisdiction; police stations and grass-roots actual combat units have set up three-level monitoring centers, which have three-level control authority, and can inspect and control their subordinate monitoring points. In the absence of special needs, users at all levels cannot skip access.
This management model of “three-level monitoring centers, hierarchical and sub-domain management”, on the one hand, the monitoring centers at all levels and the monitoring platform are connected through a dedicated network to form a social security prevention and control system with interconnected visits and resource sharing; On the one hand, the division of functions, areas, and authorities is clear, which makes management in various fields more focused, resource coordination is more reasonable, and police are handled more quickly, which greatly improves the efficiency of public security law enforcement.
Through networking, Bengbu’s urban public security monitoring image resources can be incorporated into the Anhui Provincial Image Scheduling System to achieve provincial-level resource sharing and unified scheduling.
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