Video surveillance: giving you a pair of eyes

Since the 1980s S, video surveillance has been rapidly popularized in China, especially in public security, banking, transportation, hotels and other sectors. video surveillance systems have become a necessary infrastructure. Today, driven by the demand for security protection, more and more organizations are considering video surveillance systems. Video Surveillance has become a common requirement. To help readers better understand the video monitoring system, this article introduces the related technologies of the video monitoring system, and discusses the construction and future development trend of the video monitoring system.

The rapid development of Internet technologies and applications has affected the video surveillance field. using cheap IP network resources to achieve dynamic and real-time transmission of monitoring images, people can basically achieve Anywhere) anytime), you can access your system and get the required audio and video and other monitoring and alarm information at any time.

Development of video surveillance technology

Monitoring Technology has entered China since the 1980s S. With the rapid increase in security demand, it has been developing rapidly. At the technical level, it has gone through the following stages of development.

The first generation of fully simulated monitoring, also called closed-circuit television monitoring, has dominated the security market for more than a decade from the 1980s s to the 90 s, and a large number of applications in public security, banking, military, transportation, hotels and other important units and departments. The feature is that all the video signals of the camera are transmitted to the monitoring center through analog means. The monitoring center uses video distribution and synthesis devices to output some video signals on analog display devices such as televisions, you can use a tape recording device to record or save videos.

The second generation of quasi-Digital Monitoring System, which emerged from the 1990s S, showed that it replaced the original long-latency analog video recorder with a Digital Hard Disk Video DVR, the original tape storage mode is converted into digital storage video, which solves the analog-to-digital video recording and display problems of monitoring, and integrates functions such as video recorder and video splitter to take the first step of digital monitoring.

The third generation is an all-digital monitoring system, mainly embedded Hard Disk Video DVR. It is an embedded system that integrates applications and operating systems with microprocessor and various chips, it has the following features: unchangeable, compact structure, and free from the instability of the PC, but the image remote transfer is only limited in the LAN.

With the development of computer technology and the popularization of the network, video monitoring has now developed into a network multimedia monitoring system.

Network Multimedia Monitoring System

The fundamental difference between the new generation of Video Monitoring Management System and the previous generations is that it is no longer limited to simply processing, transmitting, and controlling video signals, its core is to provide an integrated and complete management and control platform for multimedia information video, audio, and data based on IP networks. The network multimedia monitoring system is based on the network. It focuses on digital video compression, transmission, storage, and playback, and features intelligent and practical image analysis, the alarm system and access control system are integrated into one platform. It triggered a technological revolution in the video surveillance industry and quickly attracted the attention of the security industry and users. At present, the Network Multimedia Monitoring and Management System has been widely used in Multimedia Video scheduling and command, network video monitoring and conference, multimedia online live broadcast, network teaching, remote medical and other aspects.

The network multimedia monitoring system consists of a network multimedia monitoring management platform and a front-end information collection device. Its core is the network multimedia monitoring management platform. This platform integrates computer networks, communications, video processing, streaming media, and automation technologies. It is an integrated solution for video, audio, data, and diagrams, it provides functions such as network video monitoring, video conferencing, and live video broadcast. It is an integrated multimedia service management platform built on a LAN/Internet network and supports multiple transmission modes, its Applications far exceed the content covered by monitoring.

Features of the Network Multimedia Monitoring System

Although the previous video monitoring system supports transmission from analog to digital networks to IP networks, the front-end devices have a single function and the management system is relatively simple, it is difficult to meet the constant expansion of the monitoring network and the increasingly complex functional requirements. Therefore, the Network Multimedia Monitoring Management system emerged, its features are mainly reflected in the digitalization, networking, intelligence, systemization, and ultra-large scale networking capabilities of multimedia applications.

1. hierarchical network management

In the past, the monitoring network was usually self-built by enterprises or industries in some regions. The current monitoring requirements have grown to cross-industry networking, and the network scale is growing, in the past, the monitoring system was unable to manage such a large-scale monitoring network, and the Network Multimedia Monitoring and Management Platform was able to achieve ultra-large scale networking due to the hierarchical management and control mode.

2. Integration with GIS, MIS, and other systems

The Network Multimedia Monitoring Management Platform combines Geographic Information System GIS and Management Information System MIS, which provides great convenience for comprehensive management.

3. Distributed Information forwarding and storage

Although the Video and Audio Information is compressed and encoded, it still occupies a large amount of transmission bandwidth and storage space. The Network Multimedia Monitoring and Management Platform uses distributed information forwarding and storage, the virtual matrix control on the IP network greatly improves the network bandwidth utilization and reduces the investment of hardware devices.

4. Automatic addressing and positioning

The Network Multimedia Monitoring Management Platform uses dynamic domain name resolution technology. The front-end and client only need simple login operations. After authentication, the system can automatically complete the addressing and positioning functions for newly added devices, the monitoring system implements plug-and-play and unlimited scaling.

5. Effective use of private IP addresses

The Network Multimedia Monitoring Management Platform uses the virtual IP address technology to make effective use of private IP addresses, greatly saving limited public IP Address resources.

6. Linkage management with various alarm Functions

Linkage management with various alarm functions and access control systems allows the system to detect multiple alarm signals. When an alert is triggered, one or more devices can work together. For example, the video recording function is automatically enabled (events that have occurred before the alert can be recorded), the camera to the alarm preset, send text messages to a specified person, sound prompts or phone calls, and so on.

7. Remote Management

The remote management function supports remote maintenance, remote configuration, and remote status query, which greatly reduces the field maintenance workload and is as convenient as local maintenance.

8. Standard Network Architecture

The system is based on the C/S or B/S architecture and supports the Monitoring of computers and handheld PDAs, providing great convenience for users.

Smart and mobile are development trends

With the increasingly mature video monitoring system, the current video monitoring system has begun to develop intelligently. Typical functions of the intelligent video monitoring system include:

1) Security Linkage with applications, such as interaction between various security sensors, controllers, audio/video recordings, and monitoring and alarms. Various application fields can easily and flexibly define various related linkages on the monitoring software.

2) image analysis functions, such as motion analysis in sensitive areas defined within the image range, and provides targeted video recording, target tracking, and alarm linkage functions.

3) image recognition functions, such as recognizing facial images in video images, recognizing specific persons in audio, as well as recognition of license plates and targets in various industries.

In addition, with the development and maturity of wireless communication technology, another important application field has emerged, namely, mobile monitoring front-end monitoring site is mobile devices.) In the future, mobile monitoring will certainly become a new hotspot in video monitoring applications.

1. Introduction to home network video monitoring technology and prospects
2. Wireless technology analysis-High-Speed Mobile Video Monitoring Solution