Top 10 criteria for determining the quality of a Video Monitoring System

Because of the huge investment and complicated technology in the urban network video surveillance system, it is very important to objectively evaluate the system before construction. The basic features of the city video monitoring and alarm network system are the large overall investment, high technical requirements, wide user coverage, and many connection links (involving image acquisition, transmission, storage, management, sharing, and other aspects ). ). In general, the basic evaluation principles of the city video monitoring alarm network system include: whether the system can meet actual usage requirements, whether the system can be managed and maintained, and whether the system can be expanded or upgraded, can it provide conditions for intelligent function upgrade and whether the system is capable of sustainable development.

The technical evaluation of the system mainly includes 10 criteria:

1. practicality. The system should consider factors such as local environmental conditions, monitoring objects, monitoring methods, maintenance, and investment scale to meet the normal operation of the city video monitoring and alarm network system and the needs of public security management.

2. Reliability and stability. The system should adopt mature technologies and reliable equipment, and adopt backup or redundancy measures for key equipment. The system software provides maintenance support and strong fault tolerance and system recovery capabilities to ensure stable system operation for as long as possible. Once the system fails, it can be repaired or restored as soon as possible.

3. scalability. The Distributed System and modular structure design should be used to meet the needs of system scale expansion, function expansion, and supporting software upgrade. Users can expand or crop the system as needed at any time, reflecting sufficient flexibility.

4. Advancement and inheritance. The construction of the city video surveillance alarm network system cannot discard the original simulation-based system, it is appropriate to include the original simulation system as much as possible under the premise of planning a fully digital system. The ideal system is to seamlessly connect the two to form a complete network-based monitoring of city video images.

5. Price-performance ratio. Designers should reasonably set system functions, correctly configure the system, and select equipment. On the premise that the key equipment is of excellent grades, the overall price of the system should be low, so that the system has a high cost effectiveness. The selection of system front-end cameras and the level of backend software should be the focus of attention. If the number of front-end cameras is less than 460 lines, the system will not be helpful in the future, it is impossible to ensure that the system has a clear image. In some applications, advanced features such as wide dynamic range are also required.

6. Convenient system upgrade and maintenance. Because of the large scale of the system, the system software and core equipment should have the automatic upgrade and maintenance function. In addition, the City Monitoring and alarm network system is composed of multiple complex systems, including networks, storage, operating systems, platform software, various front-end devices, etc. Each subsystem should have a work log record, including all modules and core devices of the system.

7. system management functions and ease of operation. Considering the scale and complexity of the networked systems, the management software platform should have a good system architecture, and the core management and business management of the system must be clearly separated to ensure that different application needs are met. Because the number of various management servers, storage and forwarding servers in the system is large, the system's network management function must be powerful; otherwise, daily maintenance cannot be performed; the management and user interface provided by the system should be clear, concise, and friendly. The control should be simple, flexible, easy to learn, and easy to use, facilitating management and maintenance.

8. The system supports secondary development. The number of cameras in the monitoring and alarm network system of a city is also several hundred, and the number of cameras can reach tens of thousands. Therefore, the sustainable development of the platform must be taken into account. To achieve the "video cost value" goal, the system must meet the secondary development conditions. Only in this way can the platform's video resources be fully utilized.

9. system security assurance level. System Security includes multiple aspects, mainly to prevent access to illegal users and devices. In addition to different users (including Administrators and Users), different levels of verification measures should be taken, make sure that invalid devices cannot be connected to the system. Network monitoring systems are the most vulnerable to hacker attacks. effective security measures should be taken to prevent illegal access, illegal attacks, and virus infection. In addition, it is necessary to prevent unsafe factors such as lightning strikes, overload, power outages, electromagnetic interference, and man-made damage to provide comprehensive and effective security measures.

10. Compatibility and standardization degree. Compatibility is the key to connect devices of different vendors and protocols. The system should be able to communicate and share data effectively to achieve compatibility and interoperability between devices or systems as much as possible. The higher the degree of standardization and openness of the system, the longer the life cycle of the system. The control protocol, transmission agreement, interface protocol, audio/video codec, and audio/video file format must comply with the relevant national or industrial standards.