requirement analysis

At present, there are many characteristics in schools, such as large campus area, scattered venues, large number of students, and complex environment around the campus. With the increase of campus violence and accidents in recent years, the traditional human patrol can not meet the needs of campus safety management. More and more schools begin to consider the implementation of campus network video monitoring system to build a safe campus. As far as colleges and universities are concerned, they all have a common feature: scattered venues, large area, few management personnel, large number of students, active nature and poor awareness of prevention. There are hidden dangers in public places such as laboratories, student activity centers, sports grounds, libraries, student dormitories, restaurants and teaching buildings. Therefore, it is imperative for schools to build monitoring facilities and combine civil air defense with technical air defense.

Video monitoring solution for safe campus

System networking diagram

The overall monitoring system is divided into two levels. The sub control center of the school is responsible for the access of video and image resources such as teaching buildings, classrooms, laboratories and playgrounds. The images are uploaded to the monitoring center of the higher education committee through CERNET network or leased operator’s special line.

Structure composition and function application of Ping An campus video monitoring system

Campus sub control node

Each campus sub control center is equipped with hard disk video recorder, streaming media forwarding server and monitoring client. The streaming media forwarding server undertakes all the digital streaming media forwarding services in the area, and has the functions of network application management and network on demand service.

The whole storage system adopts distributed storage mode. The front-end campus realizes 24-hour real-time video recording through hard disk video recorder, which is convenient for local query and access to image sources. Important information data is synchronized to the storage platform of the general control center of the Education Committee on demand, which can effectively save the utilization rate of video bandwidth and ensure real-time video transmission.

In the campus area with high security requirements for video transmission, the security of system access can be ensured by using the network camera with encryption chip independently developed by Tongfang.

General control center of Education Commission

The general control center of the Municipal Education Commission gathers the images of each campus node through IP data private network and optical fiber to realize data transmission between each other.

The general control center is equipped with the same party security video management server, streaming media forwarding server, storage management server, control client, decoding server, etc. to realize the operation, management and control of the system.

system function

·Unique security

Tongfang security video management server adopts the security mechanism based on hardware and media forwarding stream encryption algorithm to prevent the image from being illegally stolen and tampered.

The instruction and working mode of the device operating system are user-defined and have independent intellectual property rights. The system will not be disturbed and damaged by external viruses and malicious software.

There are corresponding encryption protection measures for equipment, user, authority and other information in storage, and there should be digital watermark such as time or place in the storage of large capacity data such as video, audio and video recording, so as to ensure that the data is safe and effective in storage and can not be tampered with.

Regular backup, redundant storage and distributed storage are adopted to ensure that the stored data content is not easy to be lost.

The system has perfect authority management, intelligent control and application support ability.

·Image browsing

The system supports TV wall display and can realize centralized monitoring and management of images in multiple places. It can realize the network real-time image storage and network on demand, post view, custom on demand function.

Support local enhancement function of screen image to ensure better display effect in harsh and complex environment.

It supports the local magnification function, and can easily obtain the local clear picture in the megapixel camera image.

It supports personalized layout definition and patrol group setting, and supports manual or automatic switching between layouts and patrol groups, which is convenient for users to browse in different ways.

·Video retrieval and playback

Video file snapshot index, the user can divide the time of any video file into slices, and display it in the form of instantaneous snapshot, effectively saving video query time and operator workload.

Video bookmark management and retrieval.

The video can be played back frame by frame.

·Alarm linkage management

The system supports the alarm signals of anti-theft, disaster prevention and help seeking, and realizes alarm linkage. When any node alarm occurs, it can trigger the linkage of camera, PTZ control, video recording, switch value, etc. at the platform end. At the same time, it can quickly notify the user of the alarm by means of information prompt, client voice prompt and image pop-up, and write the alarm event and camera number and other information into the log.

·Third party equipment or system access

The system supports the access of NVR, DVR, DVS, IPC and other devices from domestic and international mainstream manufacturers.

The system provides open interface protocol and SDK, supports the access to the third-party system, and can also provide secondary development and customization services for customers according to the project situation.

·Equipment management and maintenance

It supports the functions of visual online management of the whole network equipment and system status, remote online upgrade of software, automatic update of whole network parameters, remote configuration, online status detection, automatic disconnection and reconnection, equipment heartbeat management, fault warning, etc.

·Electronic map

Through the multi-level electronic map layout camera, the user can accurately select the camera corresponding to the physical location on the map, view the lens related information, and watch the video.

Electronic maps are associated with alarm devices.

·Storage management

Distributed storage. When there are more than 1000 channels of monitoring, bandwidth and central storage capacity are limited. Distributed storage can effectively solve the problem of insufficient network bandwidth and ensure the stability and integrity of video recording.

Editor in charge: GT

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