Analyze the three major processes of digital surveillance

The current digital surveillance technologies include two modes, analog and digital hybrid (also known as semi-digital surveillance systems) and all-digital security systems.

1, highlights the advantages of hybrid digital surveillance system

The digital monitoring system, which is a mixture of analog and digital, is a monitoring system that uses front-end analog camera codec back-end digital processing technology. That is, the front-end camera is still retained as a traditional analog camera. The analog video signal is converted to a digital signal through an encoder for transmission. Video surveillance system.

The advantages of hybrid digital surveillance system are mainly reflected in moderate investment, front-end analog cameras for ease of maintenance and replacement, and front-end cameras not subject to the 90-meter network link limit. Summing up the past experience, especially in the digital monitoring technology of outdoor surveillance probes, it is recommended to use analog and digital hybrid monitoring technology. The main consideration when using outdoor IP cameras is the limitation of the transmission line of the IP network cameras. The switch is installed outdoors, but due to the outdoor environment, temperature and humidity changes and other natural conditions, the need for the outdoor configuration of the switch box, very inconvenient for management and maintenance. The use of analog-to-digital monitoring technology, because the analog video signal transmission distance and technology far more convenient than the network, the core devices such as encoders and switches can be placed in a better environment, and improve the overall stability of the system.

2, all-digital monitoring is the development trend

Compared with traditional monitoring systems, the advantages of digital high-definition monitoring are obvious. All-digital security systems use modern digital technologies, including modern sensing technologies, digital information processing technologies, digital communication technologies, computer technologies, multimedia technologies, and network technologies. The speed of information transmission improves the functions of security information collection, dissemination, processing, and display. It enables full sharing of security information and resources, improves system optimization, and enhances security. The author believes that digital surveillance is the development trend of future monitoring systems.

The use of high-definition cameras also optimizes the surveillance layout configuration. A megapixel network camera can replace two or three standard-definition cameras, or even more, under the same surveillance coverage area. After adopting the network high-definition transmission mode, all data can be transmitted by the network, including video, audio, alarm signals, and even network cameras that support POE power supply functions. The power can be provided by the network, which greatly simplifies the laying of cables during the installation process. The workload and complexity.

In addition, high-definition monitoring can provide more content, more high-definition details of the screen, so as to create conditions for the application of intelligent monitoring (video analytics, linkage). In financial, office, hotel and other projects, digital monitoring of wiring can be considered together with structured wiring. There are great construction advantages in terms of construction wiring and reduction of bridge pipelines in public areas.