Driven by the rapid development of network technology and information technology, monitoring technology has been developing rapidly with the rapid increase in the demand for monitoring systems in the security industry. The current status of video surveillance systems is the coexistence of networked multimedia surveillance systems and semi-digital surveillance systems, with networked applications as the main trend.
The networked video surveillance system is mainly composed of three parts: front-end surveillance system, surveillance management platform software and storage system. The existing network monitoring mode adopts the method of server plus storage to realize the storage of monitoring data. In addition, the management of the monitoring system and the transfer of data are completed through the installation of platform management software by additional multiple servers. This model is widely adopted at this stage. Figure 1 is the data flow diagram of the traditional network video surveillance system:
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Figure 1: Traditional network video surveillance system |
As can be seen from the above figure, this model still has some limitations.
* When the monitoring data is written and read, it must pass through the video server (storage server), then the video server will become the failure point of the system, and it will also become the bottleneck of the entire video monitoring system; in the monitoring center, if hundreds of channels When data is written at the same time, then there may be a bandwidth requirement of hundreds of MBs. Generally, storage devices will have a storage bandwidth of hundreds of MBs, so there will be no performance bottlenecks in the back end, and the front end of the video server passing through the Ethernet interface Connected to hundreds of channels of video, considering the ability of the server to withstand concurrent IO and the availability of the network card, it is difficult to withstand the simultaneous writing of hundreds of channels of video data, so the video server has become the bottleneck of the entire system;
* In a large-scale video management platform, there will be many software function modules, such as webcasting, network recording, video on demand, alarm network control, etc., and there will be many servers accordingly. The most direct impact on customers in this way is to increase the server Cost, in addition, energy conservation is now being advocated worldwide, and numerous servers, no matter in space or power saving, can not be regarded as a set of green solutions;
* As the government's increasing interest in security construction, the video surveillance system is expanding every year. The number of front-end monitoring points increases, and the storage capacity of the back-end also increases proportionally. Similarly, the video management platform also needs to be expanded accordingly. Recording, forwarding and other servers will also be increased accordingly. The entire system will be changed and expanded under the existing network environment. It will be very cumbersome.
Under such circumstances, how to solve the above problems and provide customers with a set of solutions that are simple to use, low in investment cost, and easy to expand?
UIT combined with the application requirements of the current monitoring market, launched a distributed monitoring solution for storage devices embedded in platform software, and implemented a network video surveillance storage system that integrates functions such as storage, recording, forwarding, browsing, downloading, playback, and networking. Its unique distributed networking design concept enables such distributed monitoring and storage systems to be used in places involving networked monitoring systems from building monitoring to "safe cities".
Figure 2 is the data flow diagram of the network video surveillance system designed by UIT:
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Figure 2: UIT network video surveillance system |
The distributed video surveillance storage provided by UIT integrates platform software and storage equipment. After the data is encoded, it directly enters the distributed video surveillance storage without going through the video server. At the same time, the distributed video surveillance storage will control the entire surveillance system.
Monitoring distributed video surveillance storage
UIT surveillance distributed video surveillance storage integrates platform software and disk array, supports concurrent storage of images and concurrent on-demand; receives the encoder's code stream through the network, and stores it to high-reliability back-end storage, and supports multiple people's simultaneous history Image files can be retrieved and played back on demand, enabling distributed deployment; UIT distributed video surveillance storage can install up to 48 SATA / SAS hard drives, supporting RAID0, RAID1, and RAID5; distributed video surveillance storage supports hot-swappable hard drives and redundant Surplus power supply, with environmental monitoring unit, provides industrial-grade security and stability, to ensure the security of image data; distributed video monitoring and storage concurrent network recording capacity of up to 100 channels, and can simultaneously support 100-channel video files on-demand; special The designed code stream processing buffer algorithm and streaming media architecture can ensure the stable and reliable transmission of the video code stream during the network transmission, and the video data will not be lost due to network failures and other reasons; UIT distributed video surveillance storage and client With the cooperation of software, the digital video recording and playback functions can be fully realized, and multiple storages are supported The scheme and the recording method support simultaneous playback of multiple pictures and multiple playback operations. Its unique frame marking function supports multi-condition retrieval and query.
Product function introduction
* Distributed video surveillance storage has network recording, live broadcast, playback, storage and other functions, and has intelligent analysis functions;
* Support 100-channel D1 format concurrent recording, and can support 100-channel video files on-demand at the same time;
* With video networking function, a single product can be used independently as a monitoring system, and multiple products can also be networked;
* The system can expand the capacity by adding expansion cabinets, the single system 48TB capacity can support hundreds of channels of video images online storage for more than 30 days;
* Embedded mobile video function enables users to observe and monitor images in real time through mobile phones and other communication equipment;
* Support mainstream RAID technologies such as RAID1, RAID0, RAID5 and hot spare disk technology to make the system safer and more reliable;
* Through the SCM management software, all node devices can be controlled in one center. When a node fails, the SCM software will automatically switch to the failed node, and the working status and failure information can be clearly understood through the graphical interface;
Monitoring distributed video surveillance storage solution
In response to the characteristics of the network monitoring system and the actual needs of users, UIT Division has given a solution that uses storage as the core foundation and is embedded in the monitoring platform management software.
The program has the following characteristics:
* The organic integration of the management software part and the storage hardware part takes advantage of the storage system's own technical advantages to reduce user investment, simplify network layout, and reduce maintenance difficulty; in the entire monitoring system, data streams directly enter the distributed storage platform without going through the video server. Therefore, the input cost is reduced and the system performance is improved;
* Provide RAID protection function, at the same time, the power supply, fan and other components adopt redundant design to ensure the security of monitoring data and the continuity of the system's external services; it has the function of storage expansion, and expansion cabinets can be added to storage devices through SAS cables To expand capacity, a single system has a capacity of tens of terabytes, which will save customers a lot of money and at the same time meet the capacity requirements of the project.
* UIT distributed video surveillance storage adopts a distributed architecture design. One concept adhered to is: a single distributed video surveillance storage can be self-contained, and multiple units can be connected into an organic network, and each image node is autonomous Multiple image nodes are seamlessly connected to form a larger local autonomous area, and multiple local autonomous areas are connected to form a large image information network.
* The system supports the disconnection and reconnection function. When users use the keyboard or client to retrieve images, if the network is interrupted, the distributed device responsible for forwarding images will automatically maintain the on-site information and start the automatic reconnection service to continuously query the network status. In a certain period of time, if the network returns to normal, the distributed device will automatically resume image transmission. The user has only a slight sense of image pause, and can perform normal image review and PTZ control.
* UIT distributed video surveillance storage adopts an open POSA architecture. With its powerful management functions and compatibility, compatible products cover almost all mainstream matrices, PTZ control protocols, hard disk recorders, codecs and alarm hosts on the market. Can fully protect the user's previous investment and build a complex video management system.
* Through the SCM management software, all storage devices can be controlled in one center. When a storage node fails, the SCM software will automatically switch to the failed node, and the working status and fault information can be clearly understood through the graphical interface.
By using the above-mentioned monitoring products, the UIT distributed storage system truly realizes unified resources and unified numbering, constructs a video network similar to the Internet, realizes unified management between different subsystems, and provides distributed monitoring storage management that is transparent to users system.
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