1. The practicability of the surveillance camera system. The system should consider factors such as local environmental conditions, monitoring objects, monitoring methods, maintenance and investment scale, etc., to meet the normal operation of the urban video surveillance alarm networking system and the needs of social public safety management.
2. Reliability and stability. The system should adopt mature technology and reliable equipment, and have backup or redundancy measures for key equipment. The system software has maintenance guarantee capabilities and strong fault tolerance and system recovery capabilities to ensure that the system runs stably for as long as possible. Once the system fails, it can be repaired or restored as soon as possible.
3. The scalability of the surveillance camera system. It is advisable to adopt a distributed system and modular structure design to meet the needs of system scale expansion, function expansion, and supporting software upgrades. Users can expand or tailor the system at any time as needed, reflecting sufficient flexibility.
4. The advancement and inheritance of the surveillance camera system. The construction of the urban video surveillance alarm network system cannot completely abandon the original analog-based system. The appropriate approach is to include the original analog system as much as possible on the premise of planning a fully digital system. The most ideal system is a seamless connection between the two to form a complete urban video image network monitoring.
5. Surveillance camera system performance-price ratio. The designer should reasonably set the system functions, correctly carry out the system configuration and equipment selection, and ensure that the overall price of the system is low on the premise that the key equipment is of good grade, so that the system has a higher cost performance. The front-end camera selection and the level of the back-end software of the system should be the focus of attention. If the line number of the front-end camera is less than 460 lines, no matter how good the follow-up system is, it will not help to ensure that the system has a clear image effect. In some applications, advanced features such as a wide dynamic range are also required.
6. Convenience of upgrading and maintenance of surveillance camera system. Due to the large scale of the system, the system software and core equipment should have automatic upgrade and maintenance functions; in addition, the urban monitoring and alarm networking system is composed of multiple complex systems, including networks, storage, operating systems, platform software, various front-end equipment, etc. Therefore, it is required that each subsystem should have a work log record, including system modules and core equipment.
7. The management function and easy operation of the surveillance camera system. Considering the scale and complexity of the networked system, the management software platform should have a better system architecture, and the core management and business management of the system must be clearly separated to ensure that different application requirements are met. Due to the large number of various management servers, storage and forwarding servers in the system, the network management function of the system must be powerful, otherwise routine maintenance cannot be carried out; the management and user interface provided by the system should be clear, concise, and friendly, and the control should be simple and convenient. Flexible, easy to learn and use, easy to manage and maintain.
8. The ability of the surveillance camera system to support secondary development. The number of cameras in the monitoring and alarm networking system of a city is at least hundreds, and as many as tens of thousands. Therefore, the sustainable development of the platform must be considered. To achieve the goal of "video creating value", the system is required to have the conditions for secondary development. Only in this way can the full use of platform video resources be ensured.
9. The degree of security of the surveillance camera system. System security includes many aspects, among which the main one is to prevent illegal users and equipment from accessing. Therefore, in addition to different users (including administrators and users), different levels of authentication methods must be adopted to ensure that illegal equipment cannot be accessed. Go to the system. The networked monitoring system is most vulnerable to hacker attacks, and effective safety protection measures should be taken to prevent the system from being illegally accessed, illegally attacked and infected by viruses. In addition, it is necessary to prevent unsafe factors such as lightning, overload, power failure, electromagnetic interference, and man-made sabotage, so as to provide comprehensive and effective safety protection measures.
10. The degree of compatibility and standardization of surveillance camera systems. Compatibility is the key to realize the interconnection between devices of many different manufacturers and different protocols. The system should be able to communicate and share data effectively, and achieve compatibility and interoperability between devices or systems as much as possible. The higher the standardization and openness of the system, the longer the life cycle of the system. The control protocol, transmission protocol, interface protocol, video and audio codec, video and audio file format, etc. should all comply with the requirements of the corresponding national standards or industry standards. Due to the huge investment and complex technology of the urban network video surveillance system, it is very important to make an objective overall evaluation of the system before construction. The basic characteristics of the urban video surveillance alarm network system are large overall investment, high technical requirements, a wide range of users, and multiple connections (involving image collection, transmission, storage, management, sharing, etc.). In general, the basic evaluation principles of urban video surveillance and alarm networking systems are: whether the system can meet actual use needs; whether the system is manageable and maintainable; whether the system has expansion and upgrade capabilities, and whether it can provide conditions for intelligent function upgrades; Whether it has the capacity for sustainable development.
