1. The system overview

With the improvement of our economic level and the development of science and technology, people has higher requirement for the security of the proposed. In order to prevent the occurrence of all kinds of economic crimes, protect national and people's life and property safety, ensure that all walks of life and the normal operation of the national key departments, using high-tech means to prevent and stop the crime has become a consensus in the field of security.

Detention is held, management crime, criminals, detainees are held and management is not easy, safety is the primary security problems. To protect the safety of society, also to protect the safety of prison staff, the security of the criminals. Use of advanced security monitoring equipment, can effectively strengthen the management of prisoners, intuitive reflect the field condition of a important place in time, strengthen the security measures. Is a powerful tool for modern prison management.

Therefore, the company using the high speed development of computer network technology and the advanced digital image processing technology, combined with the years concentrating on expertise and experience of the development of digital security products, in the full understanding of the actual needs of today's security monitoring and users for the future

Requirements analysis, design and develop a set of software and hardware combination, with a variety of hardware platform processing of network monitoring system, distributed network monitoring system. The successful application of the system of network security monitoring system are remote control function has already become one of the core functions of system, the system will bring more demand of distributed network monitoring function users more convenience and surprise. This system has broken the traditional video monitoring system of the host and the client concept, make the network side (client) is also able to design demand of large according to the monitoring center, network monitoring center can monitor at the same time management subordinates even more hosts, a real distributed network remote monitoring system.

2. The system design principles and design basis

2.1 system design principles

1) advanced principles: distributed network monitoring system, all core hardware device adopts international advanced TI chips as the main processing chip and H/W h. 264 compression technology, ensure after the completion of the overall system has reached the international advanced, the leading domestic level.

2) reliability principle: - series products, the core equipment in the system (including the hard disk video recorder) have passed the national ministry of public security certification, eliminates the user suspicion of stability.

3) the principle of high performance: the system requirement has the very high processing performance. Digital hard disk video recorder is able to handle 24 channels video display and video synchronization at the same time, video workstations at the same time can handle 24 channels video display and 48 video storage, synchronization can also turn 16 channels of digital simulation of hardware decoding output work.

4) scalability principle: when the system design fully consider the feasibility of the future system expansion, reserved in the system to a large number of interface of later period extend. By means of a central server stack theoretically unlimited upgrade system.

5) economy principle: to meet user needs, ensure system function, on the basis of perfect, advanced and reliable, by using the remote control of distributed network monitoring system management functions, try to reduce the cost of the system and operation and maintenance costs.

6) usability principles: time series product system after years of development, has reached the system powerful, friendly interface, software design, humanization, and easy to be ordinary users to master, and the use of the characteristics of the operation.

7) maintenance principle: system can basically in a state of free maintenance, and artificial maintenance available in remote operation, simple maintenance, easy management.

2.2 system design basis

This scheme is designed according to the following standards and specifications:

Ø \"security project procedures and requirements for the GA/T75-94;

Ø \"intrusion detector general technical conditions\" GB10408. 1-89.

Ø \"anti-theft alarm controller general technical conditions\" GB / 2663-90;

Ø magnetic switch intrusion detector GB15209-94;

Ø safe guard system in the universal graphic symbol \"GA/T74-94;

Ø \"alarm image cable transmission device\" GB/T1667-1996;

Ø \"security engineering expense budget establishment method\" GA/T 70-94;

Ø \"civil construction electrical design specifications\" (JGJ/T16-92.

Ø 30 MHZ - 1 GHZ voice and television signal system of cable distribution GB6510-86

Ø technical specification for the cable television systems engineering GB50200-94

Ø specification for design of building room class GBJ57-83

Ø local government regulations and application of industry

3. User demand analysis

Our spirit of strictly implement national and industry standards and requirements of public security department related security technology to guard against, on the premise of quality regulations, combined with the company for many years in the security industry large project implementation experience, to ensure that the network monitoring project of the jail the principle of first-class technical scheme, according to the information provided by the customer, our analysis of user requirements and core platform design idea is as follows:

Local monitoring:

1) the detention center for construction of local monitoring center, all the front-end video, audio, alarm signals, such as access to the center, and achieve real-time display, video storage, playback, yuntai control. Can provide remote access service function and remote access authentication and authority distribution and other services.

2) jail local network monitoring: request related departments can use the detention house detention center in LAN network real-time monitoring,

The video store and remote management console, and other functions (according to the permissions).

3) the municipal public security department network monitoring: request the municipal public security department can carry on the real-time monitoring of subordinate multiple jail through private networks, such as video storage, yuntai control operation. The monitoring center and demand can be achieved in the municipal public security department constitutes a large display system ability to turn digital simulation. And ensure the city between have access control ability, make its in do not have permissions to cannot be connected to monitor.

4) network monitoring: the provincial public security department asked the provincial public security department can also through the private network connection subordinates the municipal public security department,

And is able to monitor its subordinate multiple detention center. For real-time monitoring, video storage, yuntai control operation. And reserve requirements can be achieved in offering superior monitoring service interface at the provincial level, and the monitoring center in the provincial public security department turn digital simulation ability of large display system.

3.1 the local monitoring function

, according to the demand of the party a provides an important position in each of the detention house to install a variety of different kinds of cameras, infrared detector, pickup, manual alarm button, alarm, such as front-end detection equipment, in the monitoring center needs to install control equipment related videos, monitor center. The function of the specific to the following:

Image display

Guaranteed high-definition real-time image picture, but single image, image segmentation, multiple round robin, hidden area of the display a variety of ways;

Sound acquisition

Guarantees multichannel audio and video synchronization input function, clear timbre is fluent, no noise and can synchronize storage, voice and image data with package, playback quality without distortion;

The video store

Use a new generation of h. 264 high compression technology, greatly improve the effect of compression ratio and network transmission; Every road all can achieve full real time video,

System can be set up according to the schedule timing for video, video, mobile video and alarm linkage video and manual video mode; Intelligent management, loop support multiple hard disk video, without artificial in pan; Support on hot plug.

Retrieve the playback
Can video with accurate and rapid retrieval needs of video data;

Control function

Easy to control the front end is equipped with high-speed ball, yuntai camera Settings;

Alarm function

There is movement video loss alarm and alarm video, and other functions, and alarm equipment related linkage;

Electronic map

Host with functions of electronic map, the user can according to the actual situation of electronic maps and set the alarm point; After electronic map automatically pop up, showing alarm orientation;

Operating system and software upgrades

Support for multiple operating systems, user friendly interface, support software upgrade;

Using a specific function

According to the use of special requirements to develop new software functions.

3.2 remote monitoring function

With powerful network function, can use the PSTN, ISDN, ADSL, DDN, LAN, in the form of the Internet and networking, and provide firewall penetration, VLAN penetrate, router, open port and various parameters, such as function;

Using advanced network solutions for compressed format, automatic adaptive bandwidth and configure resources, optimize the network transmission speed, improve quality, reduce the network delay;

System to support multiple points to the control end of a master at the same time, remote access, or multiple points control end of multiple master end remote access at the same time, between each point are independent of each other, each other;

Remote networking with all functions of the machine, including image remote real-time monitor, remote viewing video data, remote control yuntai camera, remote alarm receiving, can also through the network of the system parameters setting of the network video hosts;

For each node of different video host grouping management, by clicking on the button, adjustable can watch the same video on a host of different images, also can be in the same window to monitor the different video images of the host;

With functions of long-distance video storage;

Can be set up on the master network control the control rights, through different password to control end of different operating authority,

To distinguish the management level, strengthen the security management;

Have upload alarm function, after the host alarm can be automatically upload pictures to set points and can automatically control end video.

4. The system composition and the function is introduced

4.1 the front-end detection equipment

The front-end detection equipment mainly include video surveillance and alarm part, choose according to the different demand of different types of equipment, video surveillance and alarm part by monitoring the host Settings related linkage, when trigger infrared detection alarm, can call the corresponding position of the camera image verification, etc.

Color video camera is generally selected part of video surveillance cameras, according to different occasions to choose different working mode of the camera, with fixed point zoom camera haeundae, fixed fixed-focus camera, half spherical type suction a top camera, etc.

Alarm part of the front-end detection equipment mainly has the passive infrared detectors, alarm button, sound and light alarm and etc.

4.2 center equipment

1, according to user's demand to provide an important position in each of the detention house to install a variety of different kinds of cameras, infrared detector, pickup, manual alarm button, alarm, such as front-end detection equipment, in the center of the monitoring center display control equipment such as the need to install the hard disk video recorder. Distributed network monitoring system, the monitoring center is the original source of the whole system. Not only must carry on the conventional display, video storage, playback, alarm processing, etc, are also responsible for provide the remote access service to legitimate users in the system, so that the remote user can manage and maintenance work.

2 center server:

In a distributed network monitoring system, all the front camera video signal will be transmitted through a central server and management. Center server in the system as a certification information center, all the remote client must have a central server authentication information, otherwise will not be able to log in normally. This is also part of the rights management module. And center server can be stacked, i.e., not only can speak a center server contains a network video server can also contain more lower center server. This function will provide our system with more powerful management ability and the ability to scale. We use our center

This characteristic of service, set the various subsystems, integrated, centralized management. Architecture for large and super large distributed network monitoring system provides a powerful platform.

4.3 the municipal monitoring center

Municipal monitoring center with the method of points control center, through all the video video workstations to the jail to selectively effective management. No matter the jail with industrial control type DVR, embedded DVR or network video server, the monitoring center can be unified display control, and the allocation of resources effectively. This can effectively avoid multiple clients at the same time for connection to the detention center monitoring host network congestion phenomenon. The monitoring center can be output to the TV wall, by means of video workstations can also through the related digital analog decoding system output to the TV wall.

4.4 the provincial monitoring center

Monitoring center at the provincial level of equipment, work methods, characteristics and municipal monitoring in basic same, can increase the relevant equipment according to the different capacity and demand.

4.5 other client

Distributed network remote monitoring system software using C/S and B/S structure of two kinds of, can be distributed in different locations of the camera centralized management and decentralized in networks at different sites, different access to the user can monitor the same image at the same time, also can choose any other monitoring image, each monitor users are not affected each other, truly \"multitasking\" real-time monitoring.

Different users on the network under the condition of the assigned appropriate permissions, can use IE browser anywhere at any time to watch the camera monitoring the scene accordingly.

5. Review

Digital video, audio, with its intuitive, easy to store, retrieve, and share, is an important part of network video monitoring system, user applications can be in the relevant business management, it enables users to obtain the abstract data at the same time, the remote real-time monitoring of site conditions. Data information is the indispensable auxiliary information system.