1、 System overview
Ping’an city application platform is a complex system engineering. It takes the high standard construction goal as the benchmark, unifies the leadership to promote, takes the careful construction plan and safeguard measures as the blueprint, and unifies the planning and implementation; Based on the scientific technical system and management methods, unify the standards and specifications; Through closely organizing the monitoring coverage network, consolidating the transmission foundation of video monitoring resources, deeply promoting the large integration, high sharing and full cooperation of the public security video monitoring system, and gradually eliminating the information island in technology. At the same time, guided by the actual combat application of public security, by integrating the intelligent application analysis technology and developing the business application function close to the actual combat, we try our best to improve the early warning and prediction ability of various departments In order to improve the efficiency of urban management in a larger scope and at a deeper level, it is necessary to realize the new business model of urban intelligent management.
With the continuous deepening of the construction and application of video image monitoring system, security technology prevention has become an important means of public security prevention and an important part of the construction of social security prevention and control system. It plays an irreplaceable role in preventing, discovering, controlling and cracking down on crimes, providing clues to solve cases, and fixing evidence of crimes. The construction of security technology prevention system plays an important role in the construction of an integrated public security prevention and control system, which is of great significance in the construction of a “harmonious society”.
According to the decision of the provincial Party committee to build a “safe city” and the spirit of the provincial political and legal work conference, it is necessary to establish a video monitoring system in the key parts of the province, such as the central towns, key market towns, main blocks, prosperous areas, public places and traffic intersections, as well as the areas with chaotic public order, in combination with the strategic planning of the county’s information development, We should speed up the construction of monitoring system in our county. Safe city video monitoring system is a necessary means for the public security county bureau to dynamically monitor the main intersections, key parts of commercial communities and complex places of public security. It can provide the commanders with intuitive information and real-time dynamic situation of public security at intersections, key parts and public places. It can communicate with the public security “110” alarm, regional network alarm, wired, wireless communication, information processing, etc The combination of traffic command and other systems will play an important role in maintaining social stability and cracking down on crimes.
2、 Design principles
Ping’an City engineering monitoring system is a large comprehensive application project. The overall design principle is to embody the principle of “overall planning, unified standard, practical effect, step-by-step implementation and economic sharing”.
3、 Demand analysis
1. Construction content
XX new front-end monitoring points and the construction of central system. Including the purchase, installation and debugging of the front-end equipment, transmission equipment, background integrated software and hardware equipment of the monitoring system; The front-end power supply of the monitoring point is solved, and the optical fiber is laid and rented; After the completion of the system maintenance services.
2. Platform description
Ping’an city project adopts distributed architecture design, each level of video monitoring system can achieve local autonomy, there is no system fault point in the structure, when the upper platform fails, the lower units can continue to work, any local fault does not affect the normal work of the system. Through the distributed architecture, it is convenient for unified planning, step-by-step implementation, and realize interconnection and mutual control through unified control protocol.
The platform adopts directory distributed object management technology, and stores all kinds of image resource objects (user, camera, IP-SAN, matrix, configuration, etc.) in the directory database. Each object has a unique name in the whole network, which truly realizes unified resource and unified number.
The platform supports the access of monitoring points and other data sources, the management of image resources and other information, and provides all kinds of required data for the application of the management platform.
After the completion of the system, it can realize the integrated access and unified scheduling of image resources in cities and towns of the whole province, flexibly upload and distribute image resources, and maximize the sharing of image resources, so as to meet the needs of decision-making, command and scheduling of public security organs at all levels to assist leaders in macro decision-making, handling emergencies, carrying out major security activities and security tasks.
3. Networking description
(1) In general, for the management platform with direct subordinate relationship, the higher center should be able to call the image of the lower center, that is, the county management center can call the sub center of the police station;
(2) When the access or transmission of image information is required, the access or transmission of image information shall be carried out through the superior management center or according to the prior agreement;
(3) In case of serious cases, incidents or urgent needs of public security business, the subordinate relationship or regional boundaries should be broken according to the instructions of the top management center, and the access or transfer of corresponding image information should be implemented.
(4) The social image information can be directly connected to the corresponding management platform of the video monitoring system, or first connected to the social monitoring alarm center, and then connected to the management platform of the networking system. For the social image information that needs to be directly connected to the management platform of the networking system, in addition to the explicit requirements for direct access to a certain level of management platform, it is generally first connected to the three-level (police station) management platform (monitoring center), and then uploaded according to the needs of public security business and social public security management requirements.
(5) When the public security image information needs to be connected to the monitoring system of other government departments, it should be approved by the public security organ and go through the corresponding procedures.
4. Transmission network
(1) After the construction of public security video private network is completed, the whole county can be connected to realize the load sharing of business flow.
(2) After the completion of the public security video private network, it can realize the network disaster tolerance, fault tolerance and other risk protection.
(3) The public security video private network can guarantee the development of multiple services.
(4) A double star (or star plus ring) is formed between the public security video private network and the public security bureau to avoid the transmission network bottleneck of the public security video private network
5. Resource access
(1) Standardization of protocol: under the standard of the Ministry of public security, the system is designed according to the requirements of unified coding and decoding standard, unified networking protocol, unified control protocol, unified numbering rules and unified image annotation.
(2) The video and image information systems are cascaded and interconnected through the unified SIP protocol (Session Initiation Protocol). SIP protocol is unified in the whole county. The system management software must be able to run SIP protocol or provide SIP gateway. Different video image information systems take SIP gateway as the core to realize the sharing of cross regional video image information resources.
(3) The interconnection between systems should be based on SOA service-oriented architecture;
(4) The system must have the ability of third-party equipment access, based on the design idea of middleware adapter;
(5) The security access platform is adopted to ensure the network transmission isolation between the public security information network and the public security video monitoring network;
(6) The social monitoring resources are connected to the video private network through physical isolation.
6. Security technology
The overall framework of networking platform security technology system is shown in Figure 4, which can be divided into four levels: physical (entity) security, communication and network security, operation security and information (data) security.
Physical security mainly includes six aspects: power supply security, electromagnetic compatibility security, environment security, equipment security, lightning protection and grounding, recording medium security.
Communication and network security mainly includes network transmission security, access security of public security video private network and output security of public security video private network.
Operation security mainly includes security monitoring, security audit, malicious code protection, backup and fault recovery, emergency treatment and security management.
Information security mainly includes six aspects: user identity authentication, access device authentication, user authority management, access control and business audit, data encryption and data integrity protection, and security domain isolation.
4、 Overall design
1. System architecture
Ping’an City engineering system is mainly managed and used by the county public security organs, and connected to a state Public Security Bureau through the public security information network. XXX government and other superior departments call all the video resources of the platform through the special line. Other government departments through the video security boundary access platform, log in to the digital video private network, realize the classification and decentralization of video monitoring resources.
At the same time, it also provides open interface to provide video resources for other business systems, and fully considers the effective integration of video resources such as government departments and social units, so as to realize the sharing of these video resources.
2. System architecture topology
Ping’an City engineering system adopts digital architecture to realize the integration and sharing of various video resources. The system adopts a network-based distributed control structure, which is a typical hierarchical organizational structure and can realize hierarchical and partitioned deployment. The topology of video monitoring system is shown in the figure
The video monitoring system of Ping’an City engineering system takes the County Bureau video management platform as the core to realize the control and management of all network resources under its jurisdiction. The new front-end monitoring point adopts the digital mode, the digital signal of the front-end point is connected to the digital video network by EPON equipment, and all kinds of front-end monitoring information adopts the digital integration.
3. System introduction
1) Introduction to County Bureau System
Effective management and authentication of all users’ rights and levels, users without permission can not use video resources;
Effective equipment access to police supervision system, bayonet system and social resource system;
To effectively conduct intelligent event analysis on key monitoring areas, inform the police at the first time, avoid the development of cases, and effectively control the occurrence and prevention of cases;
Conduct automatic inspection on the videos within the jurisdiction according to the work plan, and report the inspection results to relevant personnel automatically;
Management control realizes 7 * 24-hour uninterrupted work, and responds to emergency command and dispatch at any time;
Effective trunk line management, call all video resources in the whole network;
With the use of GIS system, we can grasp the traffic situation of each region, the current situation of key regions, and the police attendance at any time, so as to provide information for the police performance inspection;
After passing the mobile phone authentication, you can access the situation of each jurisdiction, and you can know the situation of the scene even if you are not at the scene when an emergency occurs;
After the alarm information is uploaded to the county bureau, realize the linkage strategy of the client, sound and light alarm, backup and store the alarm video, linkage GIS display the alarm information, and pop up the alarm screen;
Integrated interface software provides interface for the access of bayonet system, electronic police system and radar speed measurement system to realize unified platform management.
2) Introduction to police station system
High definition images directly enter the video private network to store and forward to the forwarding server, and then send them to the County Bureau forwarding server and the hard decoding of high-definition digital matrix on the wall;
The standard definition images are stored in the DVR through the video distributor, and uploaded and distributed to the County Bureau forwarding server through the forwarding server management. Local SD video input HD digital matrix switching on the wall;
Local storage of SD and HD images in police stations;
To effectively conduct intelligent event analysis on key monitoring areas, inform the police at the first time, avoid the development of cases, and effectively control the occurrence and prevention of cases;
The client can manage and maintain the server, encoder, DVR, IPSAN and other devices within its jurisdiction;
The local video matrix and the municipal video matrix are connected at the trunk level to complete the video command and dispatch;
After the alarm information is uploaded, the linkage strategy is carried out to realize the television wall linkage and switch the pictures near the alarm. The client automatically pops up, and realizes sound and light alarm, records alarm events and realizes alarm video recording. The alarm information is displayed on the GIS with obvious prompt, and the alarm related screen pops up on the GIS.
3) Introduction of bayonet system
All video resources can be browsed through the bayonet management platform of County Bureau;
The operator can catch and record the violation of laws and regulations at any time. To provide effective evidence for the effective management of the city;
The results of intelligent video analysis are automatically saved to traffic police for effective application according to the setting of event rules;
Through the management platform, you can switch the image to the TV wall, master the distribution of traffic flow in the city, and carry out emergency treatment and guidance for major accidents;
Provide more advanced system application for traffic police, and provide LED display for illegal vehicles in the block;
The integrated application of GIS to video and bayonet can be used to query the track of vehicles and automatically alarm the blacklist vehicles.
5) System composition
Pingan city project is mainly composed of the following parts:
Front end monitoring subsystem;
Front end bayonet subsystem;
Private network transmission subsystem;
Monitoring center subsystem;
Storage management subsystem;
Large screen splicing display subsystem;
Video management platform subsystem;
Monitoring point compensation system (optional).
Front end monitoring subsystem
Each front-end monitoring point is composed of the following parts:
(1) Front end camera (ball machine)
(2) Pole and foundation
(3) Outdoor equipment box
(4) Fiber optic transceiver
(5) Lightning protection and grounding system of front end monitoring point
The front-end equipment shall have the functions of wind resistance, earthquake resistance, lightning protection, rain protection, dust prevention, salt spray prevention, corrosion prevention and deformation prevention. The following factors shall be considered for camera, borrowing pole or upright pole and case:
(1) The working temperature range is – 10 ℃～ 60 ℃;
(2) Humidity 30% – 80%;
(3) The seismic grade is 8;
(4) Typhoon: 12;
(5) EMI ≤ 120dB.
Configuration and selection
The camera configuration depends on the specific situation of the monitoring point. In this phase, a variety of cameras are used to meet the needs of different monitoring points
(1) High definition network cameras can be used in counties, towns and streets;
(2) The entrances and exits of counties and towns can be matched by HD bayonet capture camera and panoramic camera;
(3) For the monitoring point with unsatisfactory effect of high-definition network camera, it is recommended to use fill light.
The technical parameters of the camera meet the relevant technical requirements of general technical requirements for urban monitoring and alarm network system (GA / t792-2008).
Front end port subsystem
The construction of this system will be completely based on the management of road checkpoints at all levels and the actual needs of work, with the goal of mastering the dynamic situation of road traffic, tracking down the ability of traffic hit and run, and cracking down on the crime of stealing and robbing motor vehicles, integrate the information obtained by the monitoring facilities along the road into the intelligent management platform of public security checkpoints, integrate all the data into the unified management, and realize the network processing of the system Information sharing and comprehensive utilization. It is mainly used to monitor and capture the speed, vehicle head, license plate and the facial features of drivers and passengers of all vehicles in and out of the road, automatically alarm and manually intercept the blacklist vehicles and controlled vehicles, and automatically capture and monitor the speeding vehicles on the road section. The captured vehicle records and other picture information should be able to be stored for more than half a year. The picture information of illegal vehicles (speeding, etc.) should be kept for 2 years. The data, pictures and other information of the system should be able to connect with the case event system. The system uses high-performance HD network capture camera and panoramic camera as the front-end information acquisition equipment, and its image resolution is up to 1600 × 1200 pixels, can clearly display all the details of the vehicle and the driver’s facial features in a photo, and has a high license plate automatic recognition rate.
High definition smart bayonet system is installed at the main entrances and exits of the county and urban areas
Each lane is equipped with a 2 megapixel intelligent HD camera and a flash;
Each direction is equipped with a 1.3 million pixel panoramic camera and a fill light;
Each card point is equipped with a terminal server, which is responsible for receiving data from the camera, transmitting the data to the command center through the network, and saving the data locally;
Image capture, automatic recognition and other functions are completed in the camera. The camera is connected with the terminal server through the switch, and the captured pictures and recognition results are sent to the terminal server;
Each lane camera is triggered by coil detection or video detection. Video trigger software is integrated into the HD camera to capture each vehicle passing through the card point.
Taking the case of two-way four lane without green separation belt and other hard isolation as an example, the site layout diagram is as follows:
The top view of the site layout is as follows:
Target image capture: capture the images of all targets passing through the bayonet
Vehicle license plate recognition: recognize the license plate number and color of the vehicle from the captured target image
Traffic flow statistics: Statistics of traffic flow
Speed detection and violation alarm: detect the driving speed of all target vehicles passing through the bayonet, and give sound and light alarm to the center of violation vehicles.
Data query management: real time and remote query of data in database
Equipment status monitoring: monitor and manage the operation status of the equipment to ensure the normal operation of the equipment
Communication status monitoring: monitor the communication status in the operation of the system to ensure the normal transmission of data
Remote maintenance management: through the web program, users can remote online maintenance of application software
Event logging: record all kinds of events and exception information in the application software running
System automatic timing: front and back end equipment automatically timing according to the set cycle to ensure the consistency of data
Unified vehicle control: all kinds of stolen vehicles, traffic accident vehicles and other blacklist vehicles are networked
Image resolution 1600 × 1200pixel。
Vehicle capture rate (5km / H ~ 180km / h) ≥ 99% (speed range 5 ~ 180km / h).
License plate recognition rate: ≥ 98% (in the daytime and at night, more than 5 characters are effectively recognized, including all license plate Chinese characters, regardless of fog and heavy rain, snow shielding, irregular license plate hanging, license plate damage and dirt shielding).
Identify license plate types, including civil license plate (except 5 small vehicles), police license plate, 04 new military license plate, 07 armed police license plate and 2002 new license plate.
The maximum monitoring speed is 180km / h
Speed measurement error: ≤ 0-6km / h (5-100km / h);
0 to – 6% (above 100km / h).
Image acquisition response speed ≤ 1ms
Minimum capture interval (per lane) ≤ 100ms
There are two types of vehicle types (large and small).
Image format and space JPEG2000, 24bit color, 200KB each.
Intelligent industrial camera terminal server vehicle information storage capacity 160g
System interface RJ45, RS232 / RS485 / USB / 100MB Ethernet.
The power supply voltage is ac154v ~ 264v, 48Hz ~ 52hz.
Ambient temperature – 35 ℃～ + 70 ℃
When the ambient humidity is + 40 ℃, it is less than 95%, and there is no condensation
MTBF ≥ 10000h
Private network transmission subsystem
According to the unified construction plan of the digital video private network of the county bureau, the digital video private network is constructed to carry the video image and other data in the area. The corresponding hardware equipment is added in the county bureau to make the county bureau and the lower level monitoring room access to the digital video private network of the Municipal Bureau. At present, the coverage rate of optical cable of telecommunication companies has reached more than 90%, and the underground pipe network resources basically reach all areas of the region. Without large-scale infrastructure construction, it can meet the requirements of transmission network, and the construction period is short. All the main optical cables are laid through the underground pipe network, which not only reduces the impact on the municipal environment, but also greatly reduces the probability of being damaged by external forces.
The construction content of this safe city project is mainly composed of three parts:
Construction of transmission network related equipment
Optical fiber transmission line transformation and EPON
Construction of front end access equipment.
Monitoring center subsystem
County Bureau monitoring center
The construction of County Bureau monitoring center mainly aims at the equipment transformation of County Bureau monitoring center, the construction of splicing large screen display system, and the construction of software platform. This time, we only need to consider the hardware server, database, operating system, PC computer, storage, digital matrix control system, etc. The main contents of the construction of the County Bureau monitoring center include:
Construction of relevant supporting equipment for display and control system of County Bureau monitoring center;
Transformation of equipment in monitoring center of County Bureau;
Construction of County Bureau monitoring platform;
In the County Bureau monitoring center, our configuration is as follows:
1. The IPSAN network storage device is configured to realize the centralized management and digital video recording of the front-end monitoring points by the County Bureau monitoring center.
2. The platform server is configured to build a digital video management platform
1) System management server software: realize the management of organization, personnel, equipment, task, alarm, log configuration, equipment inspection and real-time access control of remote digital video equipment;
2) Gateway service software (reserved software module and Municipal Bureau Networking): adopt SIP protocol, cascade with the superior platform according to the requirements of the County Bureau;
3) Streaming media server software: Video forwarding management, network transmission control management and internal and external network exchange control management. A single machine supports up to 400 channels of concurrent forwarding of images;
4) Network storage management server software: centralized storage and backup management of real-time images and historical videos of the monitored equipment, and provide centralized retrieval services. A single machine supports the maximum concurrent storage of 400 images;
5) Web proxy server software: provide unified web access configuration interface for all application servers such as system management, streaming media, alarm forwarding, centralized storage and retrieval, and provide unified remote monitoring and query B / C access interface for front-end monitoring equipment;
6) Alarm forwarding server software: provide alarm receiving and forwarding service for monitoring equipment managed by the system;
7) Video proxy server software: provides unified information acquisition, conversion and proxy services for video equipment, which is convenient for unified interface management of monitoring center;
8) Main control software of monitoring center: client main control software of monitoring center under C / S architecture, which can access and monitor all field devices under the authentication of system management server;
9) Monitoring center sub control software: client sub control software of monitoring center under C / S architecture;
10) Social monitoring resources access software module interface;
11) Integrated interface software provides interface for future traffic monitoring, such as: Bayonet system, electronic police system, radar speed measurement system, and realizes unified platform management.
Construction of sub control center of police station
The monitoring room of police station is the basic unit of video monitoring system, which is directly responsible for the area under its jurisdiction. It is the basis and source of video monitoring resources integration and sharing, control management and application. In terms of video surveillance technology is weak, so the design of this part is simple, convenient and reliable.
This time, the police station built a secondary platform to switch and browse the images sent by the County Bureau monitoring center. It mainly configures high-definition digital matrix, switch and control client, and realizes the management and monitoring of monitoring points by switching matrix hard decoding.
Storage management subsystem
One of the characteristics of social security dynamic video monitoring system is the huge amount of image information, which requires considerable storage capacity and sufficient storage space. At present, there are mainly two storage methods: distributed storage on DVR hard disk and network storage.
Distributed storage is characterized by nearby storage, not affected by the network. The hard disk carried by DVR can form a huge storage space, and the storage cost is low, but it is difficult to manage, especially for the fast retrieval of key video materials.
Network storage is the use of large capacity storage devices for front-end monitoring video centralized video storage, which is very convenient for data management and fast retrieval.
This scheme adopts IPSAN centralized storage mode, and stores videos in the monitoring center of County Bureau. The cost is more economical and easy to expand. The capacity of storage device is determined according to the scale of networking, image format and the time needed to save.
Video management platform subsystem
The core of XXX digital video management platform is a unified monitoring and management platform software. Through this unified monitoring and management platform software, the county bureau can realize the centralized image management of all police stations in the county, realize the networking of equipment of all manufacturers, ensure the quality of networked video transmission, provide a unified monitoring and retrieval system of video resources in the whole region, and realize information sharing.
Public security digital video management platform is based on the protocol layer of public security video information private network system, and has the functions of information resource management, equipment management, user management, network management, security management and so on.
The public security digital video management platform should be able to realize the transmission and management of various signals in the network; It supports the combination of decentralized and centralized storage mode to ensure the retrieval, comparison, management and backup of important surveillance videos; Realize unified identity authentication and authority management to ensure the security of information and data; It can realize real-time video monitoring, inspection, video information and data upload and download (retrieval), and realize the functions of integration and linkage with bayonet identification system, regional networking alarm system and police GIS.
Public security digital video management platform should adopt mature and mainstream technology to build the system platform, give full consideration to the development of public security business needs and technology, fully consider the connection with other public security information systems, and build an extensible open platform.
Through the construction of public security digital video management platform, effectively integrate the video monitoring resources of the whole county, maximize the sharing and interconnection of cross regional and cross departmental video monitoring resources, and give full play to the role of video monitoring system in strengthening social management, improving police efficiency, organizing mass prevention and control, preventing and combating crimes.
The digital video management platform should be able to realize the transmission and management of various signals in the network; It supports the combination of decentralized and centralized storage mode to ensure the retrieval, comparison, management and backup of important surveillance videos; Realize unified identity authentication and authority management to ensure the security of information and data; Realize real-time video monitoring, inspection, video information and data upload and download (retrieval), and realize the functions of integrated linkage with traffic monitoring (such as bayonet identification system), regional networking alarm system and police GIS.
The digital video management platform adopts mature and mainstream technology to build the system platform, takes full account of the public security business needs and technology development, and fully considers the connection with other public security information systems to build an extensible open platform.
The digital video management platform has the interface with other public security information systems, and provides B / s integrated interface in line with international standards, such as WebService interface, to realize the interconnection with regional networking alarm system, communication command system, fire video monitoring system, traffic monitoring system (bayonet, electronic police, radar speed measurement system), 110 integrated alarm receiving and handling system, police GIS, etc, The integrated linkage can be realized when the police situation occurs. The police situation can be reviewed and confirmed. The process and flow chart of alarming and dealing with the police can refer to the “technical guide for the construction of urban alarm and monitoring system” issued by the Ministry of public security.
In order to realize the integration with the public security information systems, the platform is required to adopt the interface standard of WebService to realize the XML language access between the systems according to the international standard; Both sides adopt the standard interface of WebService to standardize the format of mutual communication, so as to facilitate seamless integration between each other. In the application logic layer, standard protocols (such as access authentication and settings) or controls (such as video browsing and playback query DLL controls of different manufacturers) shall be provided to facilitate the access of other information systems to the monitoring platform.
In addition to the basic requirements of anti attack, anti illegal invasion and anti-virus, the system security should ensure that only legitimate users can access and use the network video monitoring system, and ensure that users can only manage their own front-end devices and view the video monitoring images of the monitoring points with permission; To ensure the security of the video files saved in the system by users, it will not be viewed by other users without permission.
With the in-depth construction of Ping’an city monitoring system, in order to avoid the platform incompatibility and information sharing caused by system integrators in different regions, which may affect the use of the system, the software selected is tested by the authorized testing center. The testing contents include standard compliance test, basic function test, cascade and interconnection test. The core of the platform software of XXX social security monitoring system is a unified monitoring and management platform software. Through a unified management platform, it realizes the networking of various integrators or different manufacturers, ensures the quality (clarity and fluency) of networked video transmission, and provides a unified authentication management, monitoring and retrieval system. The system takes the digital video application as the core, compatible with analog monitoring equipment, realizes the centralized management of social security video monitoring, traffic monitoring and bayonet monitoring and identification system, and integrates management and intelligent linkage with multiple police business systems such as 110 alarm receiving and handling system, regional technical defense networking alarm system and 119 fire communication command system, which is the core of urban alarm monitoring system, At the same time, it is also an important support platform for urban public security emergency command system.
Characteristics of digital matrix
Embedded pure hardware architecture, stable system, simple maintenance;
Modular structure and support multi service single board mixed arbitrary combination, flexible system; It is convenient to expand and upgrade in the later stage;
Support the video signal of HDMI / DVI / VGA / AV / SDI / IP and other different interfaces, and access to any switch of mixed signal at the same time;
It is a pure hardware uncompressed embedded high-definition digital matrix with no video loss and delay;
The full HD video decoding board supports up to 64 channels of HD processing capacity and standard RTSP protocol; HD / SD network video can be directly decoded on the wall; It can connect all kinds of mainstream HD splicing large screen.
It has the function of graphics processing, and supports the functions of video superposition, zooming, splicing, segmentation, roaming, etc; Support image transparent overlay, 256 levels of transparency, 2 layers.
Special control software or user-friendly SDK for system integration.
Configuration of special control keyboard, considering the use habits of county police and the scene hardware environment, the keyboard function should be centralized, comprehensive and simple to operate, and the keyboard rocker center should be equipped with image capture button to capture the dynamic picture instantaneously in real time. Among them, the number of input and output interfaces provided by the matrix must be investigated on the spot, and the extended application of the access system in the later stage shall be fully considered.
The digital HD ballplayer should be able to quickly capture clear vehicle license plate and clear facial details of running people in real time when the camera of head-on moving vehicle (speed 10 km to 100 km / h) is pushed from the perspective to the close range, and can clearly present the image on the large screen (non video and video capture).
High platform integration
The system adopts mainstream video monitoring platform products and professional video application technology, which completely realizes the basic functional requirements of security monitoring. On this basis, through the application of “system networking” design idea, and using mature network video management platform products, the system perfectly realizes the function of video networking. At the same time, the system has the functions of expanding mobile phone monitoring Integrated processing function of GIS map browsing and video intelligent analysis. The integration of the system and the original construction system fully meets the requirements of the project in the aspects of image resource reusability, system scalability and compatibility of heterogeneous devices. It has the following characteristics and advantages:
Stability is the most basic and important requirement of security system. This system applies a variety of designs and technologies to provide carrier level high reliability and stability
Adopt the design idea of “system networking”, select mature and stable network video management platform products, and do not need to carry out complex customized development. The products adopt the object-oriented distributed design conforming to SOA. After rigorous requirement analysis and architecture design, learn from the development experience of telecommunication software, and go through strict testing process, It is a professional video monitoring platform product for video networking
The design of local autonomy of distributed system effectively avoids the occurrence of system level failures
All servers of the system adopt embedded products to prevent virus
Core video management and control server supports dual hot standby.
The system supports error proofing redundancy, and real-time video, historical video and alarm linkage support invulnerability design
For historical reasons and competition needs, in the same network video management system, different manufacturers and different encoding formats of encoding and decoding equipment are often used. From the perspective of design and requirements, users also need different encoding and decoding equipment. Users need open system video management system to meet the flexible application and high stability.
The general system consumes a lot of custom development to support heterogeneous codec, and the investment is huge. Based on the object-oriented design, this system sets up a streaming media abstraction layer between the actual device control and the upper application to isolate the particularity of specific devices, and let the upper application program these devices uniformly, which is called POSA architecture.
With the help of POSA, the system supports a new class of digital devices, and needs to realize new drivers without changing the design and complex customization development. It has successfully realized the digital device support for Haikang, BOCOM, Dahua, dvmux and other manufacturers, and can support the mixed use of different types of digital devices in the same system.
POSA architecture supports the fast interconnection of alarm hosts and matrices of different models from different manufacturers.
Multi level interconnection and mutual control
After expansion or transformation, the system can seamlessly integrate the multi-level networking systems such as the matrix control host built in the early stage into the new system, including the mutual integration of the matrices between the police stations and county bureaus of the same brand with the audio and video matrix as the center in the early stage, the uploading and releasing of video signals, and the authorization control, Or the existing audio and video matrix multi-level networking system of other brands in the previous system can realize the interconnection and mutual control with the new matrix networking system.
The system uses professional storage products, single machine can support 70 images of concurrent video, and can simultaneously 32 images of concurrent video on demand, support error proofing redundancy, successfully applied in many large projects.
The system adopts advanced storage scheme, which has higher performance price ratio than the early storage system. It supports RAID5, hot swap and power redundancy, ensures the stability of video data, provides complete storage management software, and realizes various functions of large-scale storage system.
Mass streaming media distribution
One of the characteristics of the application of this project is that it needs to support multi-level forwarding and concurrent video recording of large capacity digital images. On the basis of technology, the platform software is required to have the ability of large capacity and stable streaming media service.
Streaming media refers to the continuous audio / video data stream transmitted and played in time order on the data network, which has the characteristics of continuous, real-time and sequential. In order to ensure the quality of streaming media, we need to apply professional technology to solve a series of problems, such as coding cache, network transmission, network reception, concurrent access and so on.
The system integrates the streaming media server technology which has been applied in IPTV field. It can achieve the maximum available bandwidth of 700m on Gigabit network. The video forwarding server can achieve the maximum concurrent capacity of 250 channels, which can fully meet the needs of users.
Complete trunk line management
Small video monitoring systems often ignore user rights and trunk line management. Large complex systems include many users and operators. Different users have different operation requirements and control rights for the shared video resources (cameras, codecs, video files, etc.). When an emergency occurs, leaders and managers will need to see the image of the accident point at the same time, The scarce trunk resources must be allocated according to the authority, and the system authority and trunk management are very important.
The system has a complete authority system, which can set the authority of any user for any image resource in the whole network, such as setting the camera authority for each user, whether it can be real-time monitoring, history on demand, PTZ control, etc.
At the same time, the system supports user priority level management. For the same resource, if two users have corresponding permissions, the high-level user can preempt the low-level user’s ownership of the resource, and the user’s control right will be obviously notified.
The system has perfect trunk management mechanism and optimized transparent dynamic routing algorithm. Support star, tree, ring video network with any topology, support trunk multiplexing, preemption and reservation.
Powerful network management function
Complex distributed network video system needs to realize the interconnection of multiple subsystems. The initial installation and debugging may need to configure thousands or even tens of thousands of parameters. In actual operation, it often needs to add new equipment or adjust parameters, which can not be completed by simple command line statements, Relying on developers to complete the system setup and maintenance will lead to a sharp increase in system implementation costs and unable to complete the handover to the owner.
The system provides professional configuration management software, maintenance management software and network management software, and integrates related concepts through consistent graphics and tables of the whole network, which makes the complex configuration management and maintenance management simple and feasible.
The system automatically detects the addresses of all digital devices through the program, and can directly carry out configuration management and control through the network. All management functions can be carried out at any remote end through the network. The digital device has the function of plug and play. It only needs to access the Ethernet to assign the IP address and connect the camera to observe the remote image at any time; The software can monitor the status of all codecs, which is convenient to locate the fault equipment. In the running state of the system, each codec can be maintained, overhauled and upgraded without affecting the whole system.
The system supports the automatic patrol of the whole network equipment, and can regularly detect the operation status of the whole network equipment, so as to meet the requirements of the internal security platform for equipment management.
The system provides a complete network management function based on SNMP protocol.
Integrated management of alarm information
In the video system, the alarm system can be used as an independent device, and can also be incorporated into the unified platform management. Users do not need to purchase independent alarm software. The video management control server can directly receive all kinds of alarm signals transmitted by the alarm host through RS232 / 485 or IP network to realize the local alarm linkage function, It can forward the alarm signal to the management and control system of the core platform for centralized processing, display the detailed information list of alarm input and output, motion detection and video loss in the designated PC client, set the alarm display order, and support the alarm linkage worksheet and alarm parameter setting.
It realizes the complete access of high-definition system, meets the needs of police actual combat, and provides more abundant image information resources and clues.
Later expansion function
The development of the security industry is high-definition and intelligent, while the traditional monitoring equipment is based on control and has nothing to do with the content of the processing equipment. After analyzing the development trend of the industry, it is believed that the monitoring equipment must have more video intelligent processing capacity after the monitoring digitization.
Therefore, the digital matrix adopts a high-performance programmable video processing chip, which can analyze and process the video at the pixel level, providing an excellent platform for intelligent processing; It provides a feasible platform for the increasing demand of security field, such as behavior analysis, content intelligent index and face recognition.
Editor in charge: GT