Digital video monitoring system is a new monitoring system with digital video processing technology as the core, computer or embedded system as the center and video processing technology as the foundation, using the international standards of image data compression and comprehensively using photoelectric sensors, computer networks, automatic control and artificial intelligence. Foreword, overview, components, advantages, characteristics, construction significance, development requirements, foreword For everyone, peace is one of the most basic elements of a happy life, and how to ensure a safe life undoubtedly requires the protection of a pair of discerning eyes at all times. Whether it is the monitoring of life safety, the early warning of emergencies, the monitoring of traffic violations and traffic flow, or the safety guarantee of key places, or even the monitoring of forest fire, the monitoring of borders and territorial waters, etc., advanced digital video monitoring systems are needed for protection. Specific to China, with a large population and vast territory, it is difficult to meet the needs of ensuring homeland security and people's living and working in peace and contentment only by relying on manpower. Therefore, no matter how turbulent the global economy is, China's public security market has always maintained a vigorous growth momentum. With the promotion of "Safe China" project, especially the hosting of the 2118 Beijing Olympic Games, domestic surveillance products have been widely adopted and performed remarkably, which further triggered the development of domestic digital video surveillance industry. The digital video monitoring system is a new type of monitoring system with digital video processing technology as the core, computer or embedded system as the center and video processing technology as the foundation, using the international standard of image data compression and comprehensively using photoelectric sensor, computer network, automatic control and artificial intelligence. In addition to all the functions of traditional closed-circuit television monitoring system, digital video monitoring system also has the functions of remote video transmission and playback, automatic anomaly detection and alarm, structured video data storage and so on. The main technologies related to digital video monitoring system include video data compression, video analysis and understanding, video stream transmission and playback, and video data storage. The component digital video monitoring system inputs analog video signals, digitizes them, compresses them, and then stores, transmits and controls them. It mainly includes three parts: Digital Video Recorder (DVR) collects video images and stores them in hard disk, which is called digital video recorder or hard disk recorder. Digital Video Service (DVS) transmits images to other remote computer terminals through the network. Digital Video Control (DVC) The digital video control system sends control instructions to the controlled equipment, such as controlling the up, down, left and right of the pan/tilt, focusing, distance and zoom of the camera, etc. The main technologies related to digital video monitoring system: video data compression, video analysis and understanding, video stream transmission and quality control. Advantages Compared with traditional analog monitoring, digital monitoring has many advantages: First, it is convenient for computer processing. Because the video image is digitized, it can be compressed, analyzed, stored and displayed by making full use of the fast processing ability of the computer. Through video analysis, we can find the abnormal situation in time and give a linkage alarm, so as to realize unattended operation. Second, it is suitable for long-distance transmission. Digital information has strong anti-interference ability, is not easily affected by the attenuation of transmission line signals, and can be transmitted in encryption, so it can monitor the scene in real time thousands of kilometers away. Especially when the site environment is bad or it is not convenient to go deep into the site directly, digital video monitoring can achieve the effect of visiting the site in person. Even if the scene is destroyed, the real record of the scene can still be obtained in the distance. Third, it is easy to find. In the traditional analog monitoring system, when there is a problem, it takes a lot of time to watch the video tape to find the on-site record; In the digital video surveillance system, the corresponding on-site records can be found in a few minutes by using the index established by the computer. Fourthly, the image quality and monitoring efficiency are improved. The computer can be used to denoise and sharpen unclear images. By adjusting the image size and with the help of the high resolution of the display, you can watch clear and high-quality images. In addition, you can watch 16 or even 32 video images on one monitor at the same time. Fifth, the system is easy to manage and maintain. Digital video monitoring system is mainly composed of electronic equipment, which has high integration, and video transmission can use wired or wireless channels. In this way, the whole system is modular in structure, small in size and easy to install, use and maintain. Features (1) Better monitoring effect ensures the high safety of property and people in the monitoring place and improves the defense ability against disasters and emergencies. Only the computer can complete this complex, arduous and single work, and it is free from all kinds of human interference, and completes every step of the work step by step according to the preset program; While monitoring the outside, it also plays a supervisory role for internal security personnel to avoid dereliction of duty; The introduction of multimedia electronic map in digital video monitoring system makes the monitoring layout more reasonable and intuitive, and can avoid omissions to the greatest extent. Based on the traditional alarm head and the latest video alarm technology, it can be flexibly inserted in any area covered by video. (2) The system is more flexible. The digital video monitoring system first put forward the idea of modular management, and managed the video module, audio module, alarm module, pan/tilt and lens control module, motion output module and remote control switch module by computer, which greatly reduced the work difficulty and made the construction easier. (3) Networked management network is established and developed on the basis of computers. Today, with the vigorous development of information expressway, the single traditional monitoring system is bound to be eliminated by history because of its fatal shortcomings such as poor universality, difficulty in expansion and incapability of networking. Modern large enterprises, such as group companies, chain enterprises, shopping malls, banks, post and telecommunications, electric power and other enterprises and departments with extensive information exchange, put forward higher requirements for management. The digital video monitoring system has established a computer-centered monitoring platform, which has laid a solid foundation for the future development of networking. (4) Intelligent control can be realized. With the computer as the control center, the control interface can be visualized through system software, and the control environment can be multimedia, which can conveniently realize flexible and intelligent control. While ensuring the normal operation of the monitoring equipment, once the alarm information is read in, it can be reflected in time and accurately. Taking the correct action is not accomplished by the skilled operation, psychological quality and amazing memory of the monitoring personnel. The video switching, audio switching, lens pan-tilt control, alarm reading, action output, etc. of the traditional system are independent of each other, and they are superimposed like building blocks. They are connected together by wires. Once the linkage mode is selected, they cannot be modified casually, and the wiring is very complicated and difficult to maintain. Once an alarm is input, the operator needs to complete a series of operations in a very short time, which can be realized for small systems with seven or eight points, but also for large ones. Only by using digital video monitoring system, realizing intelligent management with computer as the core, organically combining these five parts, and relying on computer to analyze, count and process, and complete every scheduled operation, can we truly keep up with the crisis. Construction Significance Using computer as the center of monitoring, and applying multimedia technology, network technology and video technology to monitoring, has completely surpassed the scope of traditional security monitoring. The introduced ideas have promoted the development of high technology and social progress, which is a milestone leap and has far-reaching practical significance: (1) Considerable economic benefits The remote access capability of digital video monitoring system provides a business management tool for owners and managers, which can be used for the management of valuables and the effective time management of important personnel. The 24-hour remote visual ability also improves the quality of life of the personnel on duty in the monitoring system. In this way, the potential market of digital video surveillance system is much larger than that of analog video surveillance system. Catering industry, banking industry, elderly silver-haired care, infant care industry all need this remote access digital video monitoring system. With it, if white-collar workers can't always take care of their parents at home, they can just plug their PC into any telephone line and dial their own digital video server protected by passwords, so they can see what is happening at home in real time. (2) Powerful deterrence "Safe and reliable monitoring system makes the alarm layout more reasonable through intelligent management of computer. The computer makes the security work orderly, avoids any omissions, and makes full use of multimedia characteristics, combined with real-time capture, video alarm, hard disk recording and other technologies, making the prevention work safer, more thoughtful and more convenient, playing a powerful deterrent to criminals and preventing crimes more effectively; Strict computer monitoring network, spanning regional time and space, tracking every monitoring site in real time; Rapid reflection ability can fight crime more effectively. " (3) Reduce the security intensity. The security work seems simple, but it is tedious, arduous and has great responsibilities. The high intelligence of digital video surveillance system further frees security personnel from boring work, and reduces the work intensity while improving security: its unique network function eliminates the hard work of leading security inspection; Combined with visual programming technology and good operation interface, the operator's interest in operation is improved, which is more conducive to man-machine cooperation monitoring and improves safety. (4) Further Laying the Foundation for Development The 21st century is the era when the monitoring system has entered the computer network in an all-round way. Abandoning the traditional system and choosing the digital video monitoring management system with the computer as the core has laid the foundation for the higher and further development in the future. The development requires that the digital video surveillance system not only conforms to the future development trend of the information industry, but also represents the future development direction of the monitoring industry, which contains huge business opportunities and economic benefits and has become a digital product of great concern in the information industry. Specifically, it is mainly reflected in the following two aspects: First, the scope of video monitoring needs to be broader, from traditional security monitoring to management monitoring and production and operation monitoring, and it also puts forward higher requirements for the coverage and implementation distance of the same system, which is to achieve a wide range in layman's terms. Second, the monitoring system should be combined with management information system and network system to realize the compressed storage, transmission and automatic processing of a large number of video data, so as to enjoy resources and provide convenient, fast and effective services for managers and decision makers at all levels.