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Analysis of the three digital monitoring process all digital is the trend

Issuing time:2017-12-15 00:00

The progress and development of society have promoted the sustained growth of demand for the security industry. The large-scale shift of the international electronics manufacturing industry to the domestic market by the end of the century brought new management concepts and new product technologies to China's security monitoring market. The monitoring industry, which used to rely on imported products, started a full-scale localization process. The rapid development of the digital monitoring market and the rapid growth of market capacity have also caused the enterprises engaged in the IT industry and home appliance industry to set foot in it one by one, disrupting the semi-closed status of the monitoring industry and accelerating the competition and differentiation of the monitoring market. This article focuses on the development of digital surveillance and its subdivision.


Digital monitoring products in China's development process


Recalling the digital development process of China's domestic monitoring and control system, the following stages are divided:


The first phase of the early nineties: the monitoring system at that time generally imported foreign matrix control host, in order to meet the current popularity of the computer needs, monitoring companies have developed using computer matrix control system host software to achieve computer monitoring System image switching, audio switching, alarm processing, image capture and other multimedia control. At this point, the computer multimedia monitoring is actually only used as an auxiliary control keyboard of the monitoring system, which can be said to be the prototype of China's digital monitoring.


The process of localization of China's surveillance products is also started at this period. Many surveillance companies started to produce or imitate the monitoring products such as matrix host, decoder, multimedia control system and PTZ peripherals that are compatible with foreign companies. It features small-scale industrialization based on traditional electronics manufacturing.


The second stage is the mid and late nineties: during this period is a period of rapid development of image processing technology, computer technology, network technology. After the completion of the industrialized production of external devices such as matrix host, decoder, multimedia control system and PTZ, Chinese domestic companies found that surveillance companies in Taiwan and abroad started to transfer their surveillance production lines based on the traditional electronics manufacturing industry to China for production. These companies Products include surveillance cameras such as video cameras, monitors, image processors, video tape recorders, alarm detectors, alarm panels and other monitoring products. The above development process is only a common phenomenon that large foreign manufacturers of electronic products enter the Chinese market in the 1990s. Most monitoring products localization process. Chinese domestic companies can buy Panasonic-made camcorders made in China, Sanyo's video recorders, and Dixon alarm detectors at lower prices, prompting the popularity of monitoring systems in China.


At this stage, foreign countries have begun to digitize the monitoring process. The first digital surveillance products to be introduced into the country are the telephone line transmission and network transmission products manufactured in the United States and Israel. The image compression standard adopts MJPEG and the system has simple digital monitoring and network monitoring Many functions, and there is a feature that makes the entire monitoring industry novel features jujube digital video capabilities. As the digital monitoring equipment has just been introduced into the monitoring industry, its high value-added high-tech immediately attracted a large number of monitoring companies to invest in it. They all developed digitally-controlled host computers based on computer architecture. The system integrates matrix switchers, image splitters, hard disk recorders Integrated in a computer platform, formed a monitoring host with Chinese characteristics, and develop into industry trends.


The third stage is after 2000: With the progress of image compression technology, especially the extensive popularization and application of MPEG-I and MPEG-II image compression chips, since 2000, digital surveillance products have entered a period of rapid development, and products From the original digital surveillance video host development to network cameras, network transmission equipment, telephone transmission equipment, professional digital video recorders and other products.


After 2000, with the digitization and networked demand of China's domestic supervisory control system, the digital hard disk video recording equipment began to replace the traditional analog video recording equipment and the market share of digital surveillance products continued to grow. As a result, many traditional IT enterprises, network enterprises, home appliances Enterprises are optimistic about this market, investing funds, manpower, developing digital surveillance products, digital surveillance market presents an unprecedented prosperity.


Digital monitoring technology to full digital


The current digital monitoring technology is mainly mixed with analog and digital (also known as semi-digital monitoring system) and all-digital security system in two modes.


1, hybrid digital monitoring system highlights the advantages


Analog and digital mixing digital monitoring system is a front-end analog camera codec back-end digital processing technology monitoring system that the front-end camera is still retained as a traditional analog camera, analog video signal through the encoder to convert digital signals for transmission Video surveillance system.


The advantages of hybrid digital surveillance systems are mainly reflected in the moderate investment, front-end analog camera for easy maintenance and replacement convenience, the front-end camera is not limited by the network 90 meters link. Summarizes the past experience, especially in outdoor monitoring probes and more residential digital monitoring technology recommended the use of analog and digital hybrid monitoring technology, the main consideration when using IP cameras outdoor, by the IP network camera network cable transmission link restrictions need to Outdoor installation of switches, but by the outdoor environment, changes in temperature and humidity and other natural conditions, the need for the switch configuration outdoor cabinet, very inconvenient management and maintenance. The use of analog-digital monitoring technology, the analog video signal transmission distance and technology is far more convenient than the network transmission, encoder and switch and other core equipment can be placed in a better environment indoor to improve the overall stability of the system.


2, all-digital monitoring is the development trend


Compared with the traditional monitoring system, digital HD surveillance technology has obvious advantages. The all-digital security system uses modern digital technologies, including modern sensing technology, digital information processing technology, digital communication technology, computer technology, multimedia technology and network technology, accelerating The speed of information transmission improves the functions of information collection, dissemination, processing and display of security information, fully shares security information and resources, improves system optimization and enhances security. I believe that all-digital monitoring system is the future development trend.


The use of high-definition video camera can also optimize the monitoring configuration, in the monitoring area coverage under the same conditions, a megapixel network camera can replace the original 2 or 3 standard definition cameras, or even more. After using the network HD transmission, all the data can be transmitted by the network, including video, audio, alarm signals, and even support POE power supply network camera, power can be provided by the network, greatly simplifying the installation process of laying cables The workload and complexity.


In addition, high-definition monitoring can provide more content, more high-definition details of the screen, which for intelligent monitoring (video analysis, linkage) to create the conditions for the application. In the financial, office, hotel and other projects, digital monitoring of wiring can be structured with the wiring to consider, from the construction of wiring and reduce the common area of the bridge line there is a great construction advantage.


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