There are 18 police stations and one branch in the jurisdiction of a certain branch of a city. Due to the city's plan for the construction of the video surveillance system, large-scale networking within the industry has been realized by combining digital and analog multi-level networking. This article is based on this cascading city public security video surveillance construction program detailed introduction.
In the early stage, both the branch office and the police station used the analog matrix to switch directly to the video wall. The MAX1000 matrix is ​​used. When the matrix is ​​connected, the video surveillance system composed of analog video matrix is ​​used as the node; the one-to-one fiber transmission system is adopted. Networking. * Internal image resources require three-level networking, two-level management, and unified integration requirements. Since all the video information is transmitted using analog video matrix and optical fiber, the image quality is relatively high; operators on any node in the network can conveniently and quickly control the fast ball to capture the fast moving target in real time, and the control command delay is not noticeable. However, the actual application of the simulation network system for many years and the upgrade of its requirements have been urgently resolved due to its own design problems:
1. Most of the video monitoring points established in the early stage were standard analog video points. In the later part of the regional supplement process, a few network standard definition cameras and network HD cameras were added. The brand of the network camera is three domestic The mainstream brands; the SD and HD videos of these networks are managed by the respective police stations through their respective clients. There is no unified management with the previously established simulation system; all newly added videos of the city are determined according to the unified deployment of the municipal government. The monitoring point is HD-SDI HD video, HD-SDI HD 1080p@25P HD video camera or dome camera, HD SDI optical transceiver.
2. One of the basic requirements for the construction standards promulgated by the Bureau of the Municipality is to use a combination of digital-analog and multi-level networking, and use SDI HD-related equipment to gradually upgrade the equipment in the system from standard definition to high-definition; The original SDTV analog system video and the existing SDTV HD network video are integrated on a unified platform for comprehensive management. While fully exploiting the advantages of SDI HD real-time performance, all types of video are unified to splice large-screen TVs. The wall performs arbitrary tuning and emergency command.
3. Effectively realize the sharing of image resources. Provides an extensive video resource library for emergency command systems to provide video images. At the same time, it can also provide video sharing between different government units to realize visualized video coordination management; and solves traditional multi-levels. Networking brings issues such as trunk management and user-level rights management to achieve unified rights management across the entire network.
4. Make full use of the advantages of analog video and SDI video images, including high fidelity of information, convenient interconnection, etc. The transmission of video images will mainly adopt non-compressed video transmission methods. When digitalization is required, digitize it and implement it. Analog and digital hybrid networking.
5. Combining the current status of safe city construction in the city and the needs of users, to protect existing investments to the greatest extent possible, while striving to achieve the best economic and social effects under the guiding ideology, the established public security video surveillance project is in the overall plan for the construction of safe cities. Integrate to solve the problem that the existing network cannot be compatible or does not consider the analog and high-definition SDI entry of other manufacturers and the decoding display of a multi-brand and multi-protocol network camera.
The video surveillance part of the SDI high-definition video three-tier architecture command center, branch command center and the police station three-level command image through the SDI high-definition hybrid matrix control cascade, to achieve the entire network of image resource calls and unified management of resources to meet the command and dispatch Special application requirements for image resources.
The real-time image of the front-end monitoring point is uploaded to the respective police station through the optical fiber, converged into the local analog matrix of the police station and the SDI high-definition hybrid matrix, and the SDI high-definition hybrid matrix control system of the police station passes the protocol converter and the original max1000. The analog matrix realizes interconnection and mutual control. All the analog video of the original analog matrix can be switched and viewed on the TV wall through the SDI high-definition mixing matrix. Then the SDI HD output channel of the SDI HD mixing matrix is ​​used, and the SDI optical fiber is used. Pass 4~8 images to the branch monitoring center. Since all the substations are compatible with all the SDI HD video of all the police stations, the MAX analog matrix of the branch command center is abandoned and the HD mixing matrix is ​​directly used. The input of the matrix is ​​connected to 18 inputs. 4~8 SDI HD video signals of the SDI matrix output channel trunk of the police station are given 4~8 SDI HD video to each police station at the output end, enabling any police station to view and switch the SDI mixing matrix videos of other police stations. signal.
The same city command center directly uses the HD mixed matrix directly. The input of the matrix is ​​connected to the SDI matrix of the 10 branch offices and the 4~8 SDI HD video signals of the trunk channels are output to the 4~8 SDI HD video at the output end. Each branch office can realize that any branch office can view and switch the video signals of the SDI mixed matrix of other branch offices and police stations.
SD analog, network video and SDI HD video compatibility issues for analog video: The SD video and matrix control systems built by the police stations in the early stages can be added to the SDI hybrid matrix of the police station in the later stage to add the standard definition input boards to solve the problem. MAX's analog matrix output 16 channels of analog video access SDI mixing matrix's SD input board, and then adding protocol converters between Red Apple's SDI mixing matrix and MAX analog SD matrix to realize all video of SDI mixing matrix to MAX simulation matrix The control of the same; in the sub-bureau and the city's superior SDI hybrid matrix can be achieved through 4 ~ 8 SDI HD video trunk to control all the police station all analog video;
For newly added SD/HD network video signals: In the PE90SDI hybrid matrix, an optional high-definition multi-protocol decoding output board is selected. This output board also has the decoding capability of the network video multi-protocol, and can be used by three mainstream brands of network cameras. Direct decoding is performed on the local police station or through the streaming media server of the video integrated management platform to forward and copy the network video stream, and decoding is performed on an authorized high-definition matrix of any local police station or branch office or city hall;
A large number of SDI high-definition video signals have been identified for the later period: this can be solved by adding the SDI high-definition input board of the PE90 high-definition digital matrix. The PE90 high-definition video matrix can achieve full-scale cross-dimension expansion of a single system through the expansion board. Each SDI HD input board It also has a corresponding loop-through output channel to distribute and output the SDI HD video of each channel to the SDI HD encoder configured in the police station for digital encoding. The array is used to realize digital storage of SDI HD video.
Video storage and image resource sharing and rights allocation issues The original analog video is a distributed hard disk recorder to achieve distributed storage. In this solution, we can make full use of existing equipment, to maximize the protection of existing Investment, no further changes; for the newly added SD/HD IP cameras, we need to use the functions of the storage unit of the Red Apple PE5060 video integrated management platform to connect these three mainstream branded IP cameras to the platform. Integrated storage; similarly, we encode the encoded SDI video data into the platform to achieve integrated storage through storage units and arrays.
Through the integrated management platform, the original hard disk recorder, the newly added three branded network cameras, and the high-definition video signal encoded by the SDI encoder are unifiedly integrated and managed, and implemented in the same digital private network platform. Unified scheduling of integrated management of all videos in the network.
The three-level networked command center, branch command center, and police station level 3 digitize the image of the local domain or monitor the IP network to achieve a unified streaming media network application, adapt to the application requirements of the triple play, and share the application unit network. Application requirements. The network has already completed the video private network in the dedicated three-fourth operation network with triple play convergence. This network has provided 1000M dedicated broadband network for the municipal application command center and each sub-county (city) bureau and team. "Urban Construction" is an application of streaming media. It also accesses the municipal government's government affairs network through the government affairs network, provides shared services for the government's functional departments, and interconnects with higher authorities through the Urban Council* network to provide online sharing of local image resources. Realize the "Safe City Construction" digital image sharing application on the computer desktops of government agencies, government emergency platforms, and government affairs networks.
In the later period, it is also possible to access the street or social network video to the private network by means of authorization and gatekeeper isolation to realize more large-scale video resource sharing and application.
Through the way of registration and authorization, the integrated management platform can realize the permission for all users in the network to view all the front-ends in the network.
As for the three-level cascading control system implemented by the SDI high-definition hybrid matrix in the central office command center, branch command center, and police station, users can be given priority to users in the system through the CS-based client management system of the SDI HD mixing matrix. The level setting can also be used to control the entire system with full crossover user priority by controlling the keyboard. This system sets up 64 users and different passwords, which can limit the operation of unrelated personnel. And can control the keyboard to indicate the current system working status in real time. Because this system is a multi-level networked control system, users can log in to any client or master control keyboard within the system by registering a successful user name, and can achieve a predetermined level of authorization to achieve the control of the system-wide video. This has great practical significance in the practical application of emergency command. In the event of emergencies, the leaders of the city bureau can choose any police station or branch office as the command center and can realize the call of the whole network image resources and the unified management of resources, and adapt to the special application requirements of the command and dispatch of image resources.
Wall management of all images in the system:
This system can not only achieve the need for large-capacity high-definition SDI surveillance video access on the wall display, but also meet the unified access of high-definition, standard definition, digital, analog and other types of front-end monitoring points, implementation is simpler, maintenance is simpler, and simplified. Monitoring center equipment types, the cost is lower.
Because the high-definition digital matrix is ​​compatible with video and image input of various interfaces such as VGA, DVI, or SDI, the image and high-definition video conference signals of the actual platform PC of the police station can be directly connected to the integrated display control in the display wall and can be controlled. All front-end video images can be flexibly handled on the wall, such as switching, splicing, and roaming (no large-screen splicing processor is needed).
Conclusion The system realizes the complete access of the SDI HD system, meets the requirements of actual combat, and provides richer image information resources and clues. This system design retains the original investment and existing equipment to the utmost, and the overall In addition to the additional high-definition equipment, the program architecture has not undergone any other major changes, and has not affected the existing system completely in the process of high-definition system transformation.
The system follows the original digital-analog combined three-level networking architecture. Both analog and digital dual-video networks complement each other to achieve the perfect experience of high-definition video surveillance; due to the legacy three-tiered networking architecture, operations and The use of personnel fully follows the original operating habits. After the system is transformed, it can not only achieve the need for large-capacity high-definition decoding and display on the wall, but also can meet the unified access of various front-end monitors such as high-definition, standard definition, digital, and analog, and the implementation is simpler. The maintenance is simpler, the type of equipment in the monitoring center is simplified, and the cost is lower.
In the early stage, both the branch office and the police station used the analog matrix to switch directly to the video wall. The MAX1000 matrix is ​​used. When the matrix is ​​connected, the video surveillance system composed of analog video matrix is ​​used as the node; the one-to-one fiber transmission system is adopted. Networking. * Internal image resources require three-level networking, two-level management, and unified integration requirements. Since all the video information is transmitted using analog video matrix and optical fiber, the image quality is relatively high; operators on any node in the network can conveniently and quickly control the fast ball to capture the fast moving target in real time, and the control command delay is not noticeable. However, the actual application of the simulation network system for many years and the upgrade of its requirements have been urgently resolved due to its own design problems:
1. Most of the video monitoring points established in the early stage were standard analog video points. In the later part of the regional supplement process, a few network standard definition cameras and network HD cameras were added. The brand of the network camera is three domestic The mainstream brands; the SD and HD videos of these networks are managed by the respective police stations through their respective clients. There is no unified management with the previously established simulation system; all newly added videos of the city are determined according to the unified deployment of the municipal government. The monitoring point is HD-SDI HD video, HD-SDI HD 1080p@25P HD video camera or dome camera, HD SDI optical transceiver.
2. One of the basic requirements for the construction standards promulgated by the Bureau of the Municipality is to use a combination of digital-analog and multi-level networking, and use SDI HD-related equipment to gradually upgrade the equipment in the system from standard definition to high-definition; The original SDTV analog system video and the existing SDTV HD network video are integrated on a unified platform for comprehensive management. While fully exploiting the advantages of SDI HD real-time performance, all types of video are unified to splice large-screen TVs. The wall performs arbitrary tuning and emergency command.
3. Effectively realize the sharing of image resources. Provides an extensive video resource library for emergency command systems to provide video images. At the same time, it can also provide video sharing between different government units to realize visualized video coordination management; and solves traditional multi-levels. Networking brings issues such as trunk management and user-level rights management to achieve unified rights management across the entire network.
4. Make full use of the advantages of analog video and SDI video images, including high fidelity of information, convenient interconnection, etc. The transmission of video images will mainly adopt non-compressed video transmission methods. When digitalization is required, digitize it and implement it. Analog and digital hybrid networking.
5. Combining the current status of safe city construction in the city and the needs of users, to protect existing investments to the greatest extent possible, while striving to achieve the best economic and social effects under the guiding ideology, the established public security video surveillance project is in the overall plan for the construction of safe cities. Integrate to solve the problem that the existing network cannot be compatible or does not consider the analog and high-definition SDI entry of other manufacturers and the decoding display of a multi-brand and multi-protocol network camera.
The video surveillance part of the SDI high-definition video three-tier architecture command center, branch command center and the police station three-level command image through the SDI high-definition hybrid matrix control cascade, to achieve the entire network of image resource calls and unified management of resources to meet the command and dispatch Special application requirements for image resources.
The real-time image of the front-end monitoring point is uploaded to the respective police station through the optical fiber, converged into the local analog matrix of the police station and the SDI high-definition hybrid matrix, and the SDI high-definition hybrid matrix control system of the police station passes the protocol converter and the original max1000. The analog matrix realizes interconnection and mutual control. All the analog video of the original analog matrix can be switched and viewed on the TV wall through the SDI high-definition mixing matrix. Then the SDI HD output channel of the SDI HD mixing matrix is ​​used, and the SDI optical fiber is used. Pass 4~8 images to the branch monitoring center. Since all the substations are compatible with all the SDI HD video of all the police stations, the MAX analog matrix of the branch command center is abandoned and the HD mixing matrix is ​​directly used. The input of the matrix is ​​connected to 18 inputs. 4~8 SDI HD video signals of the SDI matrix output channel trunk of the police station are given 4~8 SDI HD video to each police station at the output end, enabling any police station to view and switch the SDI mixing matrix videos of other police stations. signal.
The same city command center directly uses the HD mixed matrix directly. The input of the matrix is ​​connected to the SDI matrix of the 10 branch offices and the 4~8 SDI HD video signals of the trunk channels are output to the 4~8 SDI HD video at the output end. Each branch office can realize that any branch office can view and switch the video signals of the SDI mixed matrix of other branch offices and police stations.
SD analog, network video and SDI HD video compatibility issues for analog video: The SD video and matrix control systems built by the police stations in the early stages can be added to the SDI hybrid matrix of the police station in the later stage to add the standard definition input boards to solve the problem. MAX's analog matrix output 16 channels of analog video access SDI mixing matrix's SD input board, and then adding protocol converters between Red Apple's SDI mixing matrix and MAX analog SD matrix to realize all video of SDI mixing matrix to MAX simulation matrix The control of the same; in the sub-bureau and the city's superior SDI hybrid matrix can be achieved through 4 ~ 8 SDI HD video trunk to control all the police station all analog video;
For newly added SD/HD network video signals: In the PE90SDI hybrid matrix, an optional high-definition multi-protocol decoding output board is selected. This output board also has the decoding capability of the network video multi-protocol, and can be used by three mainstream brands of network cameras. Direct decoding is performed on the local police station or through the streaming media server of the video integrated management platform to forward and copy the network video stream, and decoding is performed on an authorized high-definition matrix of any local police station or branch office or city hall;
A large number of SDI high-definition video signals have been identified for the later period: this can be solved by adding the SDI high-definition input board of the PE90 high-definition digital matrix. The PE90 high-definition video matrix can achieve full-scale cross-dimension expansion of a single system through the expansion board. Each SDI HD input board It also has a corresponding loop-through output channel to distribute and output the SDI HD video of each channel to the SDI HD encoder configured in the police station for digital encoding. The array is used to realize digital storage of SDI HD video.
Video storage and image resource sharing and rights allocation issues The original analog video is a distributed hard disk recorder to achieve distributed storage. In this solution, we can make full use of existing equipment, to maximize the protection of existing Investment, no further changes; for the newly added SD/HD IP cameras, we need to use the functions of the storage unit of the Red Apple PE5060 video integrated management platform to connect these three mainstream branded IP cameras to the platform. Integrated storage; similarly, we encode the encoded SDI video data into the platform to achieve integrated storage through storage units and arrays.
Through the integrated management platform, the original hard disk recorder, the newly added three branded network cameras, and the high-definition video signal encoded by the SDI encoder are unifiedly integrated and managed, and implemented in the same digital private network platform. Unified scheduling of integrated management of all videos in the network.
The three-level networked command center, branch command center, and police station level 3 digitize the image of the local domain or monitor the IP network to achieve a unified streaming media network application, adapt to the application requirements of the triple play, and share the application unit network. Application requirements. The network has already completed the video private network in the dedicated three-fourth operation network with triple play convergence. This network has provided 1000M dedicated broadband network for the municipal application command center and each sub-county (city) bureau and team. "Urban Construction" is an application of streaming media. It also accesses the municipal government's government affairs network through the government affairs network, provides shared services for the government's functional departments, and interconnects with higher authorities through the Urban Council* network to provide online sharing of local image resources. Realize the "Safe City Construction" digital image sharing application on the computer desktops of government agencies, government emergency platforms, and government affairs networks.
In the later period, it is also possible to access the street or social network video to the private network by means of authorization and gatekeeper isolation to realize more large-scale video resource sharing and application.
Through the way of registration and authorization, the integrated management platform can realize the permission for all users in the network to view all the front-ends in the network.
As for the three-level cascading control system implemented by the SDI high-definition hybrid matrix in the central office command center, branch command center, and police station, users can be given priority to users in the system through the CS-based client management system of the SDI HD mixing matrix. The level setting can also be used to control the entire system with full crossover user priority by controlling the keyboard. This system sets up 64 users and different passwords, which can limit the operation of unrelated personnel. And can control the keyboard to indicate the current system working status in real time. Because this system is a multi-level networked control system, users can log in to any client or master control keyboard within the system by registering a successful user name, and can achieve a predetermined level of authorization to achieve the control of the system-wide video. This has great practical significance in the practical application of emergency command. In the event of emergencies, the leaders of the city bureau can choose any police station or branch office as the command center and can realize the call of the whole network image resources and the unified management of resources, and adapt to the special application requirements of the command and dispatch of image resources.
Wall management of all images in the system:
This system can not only achieve the need for large-capacity high-definition SDI surveillance video access on the wall display, but also meet the unified access of high-definition, standard definition, digital, analog and other types of front-end monitoring points, implementation is simpler, maintenance is simpler, and simplified. Monitoring center equipment types, the cost is lower.
Because the high-definition digital matrix is ​​compatible with video and image input of various interfaces such as VGA, DVI, or SDI, the image and high-definition video conference signals of the actual platform PC of the police station can be directly connected to the integrated display control in the display wall and can be controlled. All front-end video images can be flexibly handled on the wall, such as switching, splicing, and roaming (no large-screen splicing processor is needed).
Conclusion The system realizes the complete access of the SDI HD system, meets the requirements of actual combat, and provides richer image information resources and clues. This system design retains the original investment and existing equipment to the utmost, and the overall In addition to the additional high-definition equipment, the program architecture has not undergone any other major changes, and has not affected the existing system completely in the process of high-definition system transformation.
The system follows the original digital-analog combined three-level networking architecture. Both analog and digital dual-video networks complement each other to achieve the perfect experience of high-definition video surveillance; due to the legacy three-tiered networking architecture, operations and The use of personnel fully follows the original operating habits. After the system is transformed, it can not only achieve the need for large-capacity high-definition decoding and display on the wall, but also can meet the unified access of various front-end monitors such as high-definition, standard definition, digital, and analog, and the implementation is simpler. The maintenance is simpler, the type of equipment in the monitoring center is simplified, and the cost is lower.
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