Anti theft monitoring system is developed and expanded with the emergence of TV and camera. In this short decades of development process, with the continuous impact of the new technological revolution, it has experienced different development stages.

One-to-one monitoring: the earliest products mostly focused on one-to-one monitoring of cameras and monitors (TV). The connection mode is directly connected one-to-one by video cables. There are as many monitors as there are cameras. There is no technical content. It is the primary stage of the development of anti-theft monitoring system.

Control circuit: the first mock exam is that people are slowly finding out that this mode is a great waste to monitor, and then a video switcher is gradually appearing to make up for this shortcoming. The further expansion of monitoring range and the introduction of zoom lens and PTZ will inevitably lead to the emergence of controller. At this time, due to technical limitations, the switching control circuit system is only a simple combination of hardware circuits. Video switching and control are independent. Most of the control adopts multi-channel switches and one-to-one direct connection of multi-core cables. The transmission distance is short, the wiring is complex, the operation is cumbersome, it is difficult to realize multi center control, the system capacity is small, the expansion is difficult, and the regional networking can not be realized.

Processor system: in the 1970s and 1980s, with the rise of new technological revolution, microprocessors were further popularized and developed. Anti theft monitoring really has its own "core", which combines switching and control, which is not a small progress. However, with the changes of the times, this microprocessor monitoring system can not keep up with the pace of the times. Due to the use of non-standard system, limited by single chip microcomputer (8-bit, 16 bit chip), the system has limited functional capacity and running speed, large volume, easy crash, no dialogue screen menu, lack of good man-machine interface, many operation steps, poor compileability, once the linkage control mode is determined, it is difficult to modify, the system sub control adopts communication mode, and can not be networked with the standard computer, Poor compatibility and difficult system upgrade.

Plug in Multimedia: in the 1990s, with the budding development of computer multimedia technology, people slowly transition from simple computer compilation and control mode to computer multimedia. They use the high resolution of computer display to transmit all the video and collect it to computer display through video capture card. However, the first mock exam is still the traditional host computer, which is connected to the computer through serial port and is simple and easy to control. This mode is called the monitor system of plug-in multimedia. Although it has a relatively good man-machine interface, it can not be called a real multimedia system. The fundamental reason is that the starting point of the system design is not based on the computer, but based on the traditional microprocessor monitoring mode. In order to adapt to the rapid development of computer multimedia technology and the needs of customers, it is only passively improved and assembled on the original basis, Most of the time, the computer just acts as an external monitor and does not play its real role. Moreover, the inherent disadvantages of the traditional microprocessor system have not been overcome, and the diversification and specialization of communication protocols are difficult to be unified, resulting in that the existing computer resources are far from meeting the needs of a variety of devices. At present, the more advanced monitoring equipment is equipped with RS-232 serial port communication, but imagine that if the switcher, PTZ controller and alarm controller are stacked together, how many serial ports can the computer provide services? In terms of linkage connection mode, it is still only the combination of cables, which can not truly realize computer intelligent management.

Transitional digital video: in the late 1990s, with the rapid development of digital video technology, the concept of digitization was gradually accepted by people. Some manufacturers engaged in video board production see that this field is profitable, convert some video technologies used for civil use, and launch their own video system for monitoring. Because these manufacturers have no previous background and practical experience in the monitoring field, the designed products may have some advantages in video processing, but they often do not meet the safety requirements and industry specifications. What we want to investigate is the comprehensive monitoring capability of a system. A mature and perfect monitoring system should not only complete video processing, but also have instructions to process a large number of control, alarm, linkage and other data to complete various complex functional requirements of users. This kind of system is represented by Korean series. Although it has a beautiful interface and is advertised as a digital system, it does not meet the security standards of the Ministry of public security in terms of functional requirements, and there are potential safety hazards. It can only be used for small systems with simple functions below 16 channels, and it is unable to expand the system, which is the fatal injury of this kind of products. The technology industry is specialized. There is still a long way to go to truly meet the actual monitoring design requirements. Moreover, once these companies find that this field is unprofitable, they will certainly change careers, which is difficult to have sustainable development, and it is difficult to ensure after-sales service.

Digital media monitoring management system: what is the real digital multimedia monitoring system? It is completely based on the computer, with it as the core, combined with the actual requirements of security monitoring and the continuously improved security theory and experience over the years, and using the latest digital video technology, fieldbus technology and network communication technology to establish a new and complete security system with the combination of software and hardware, optimize the internal structure and reduce unnecessary links, Improve the overall performance and response speed, meet the needs of the continuous development of new technologies, provide users with comprehensive value-added services, provide comprehensive solutions for digital media monitoring and management according to the different needs of different industries, improve the monitoring from security to management, and infiltrate all walks of life with video as the main line and combined with relevant actual businesses, Promoting the continuous development of productivity and providing comprehensive services for its development is the direction of future development. Meidian bell is committed to the purpose of "monitoring for management". Integrating many years of video monitoring experience, Meidian bell digital multimedia monitoring and management system is positioned as a management platform for the 21st century, and has been widely used in all walks of life.

The design of this scheme is based on the latest development stage of the system, makes full use of the convenience of modern high technology, and can apply the multimedia monitoring technology based on computer network to bring the control and management of multimedia monitoring and the processing of monitoring video images into the unified management of computer network. The multimedia monitoring system uses hard disk to record the monitoring images, which can easily realize the remote picture monitoring and playback of the internal computer information network.