The monitoring technology is driven by the rapid development of network technology and information technology, and has been rapidly developing with the sharp increase in the demand for monitoring systems in the security industry. At present, 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.
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The networked video surveillance system is mainly composed of three parts: the front-end monitoring system, the monitoring management platform software and the storage system. The existing network monitoring mode uses the method of server plus storage to realize the storage of monitoring data. In addition, the management of the monitoring system and the call of data are completed by installing additional platform management software by multiple servers. This mode is widely used at this stage. Figure 1 is the data flow diagram of the traditional network video surveillance system:
As can be seen from the above figure, this model still has some limitations.
The monitoring data must pass through the video server (storage server) when writing and reading, then the video server will become the fault point of the system, and it will become the bottleneck of the entire video monitoring system; in the monitoring center, if hundreds of data At the same time of writing, there may be hundreds of megabytes of bandwidth requirements. Generally, the storage device will have a storage bandwidth of several hundred MB, so there is no performance bottleneck on the back end, and the front end of the video server flowing through the Ethernet interface Hundreds of channels of video are connected. Considering that the server itself is capable of concurrent IO and the availability of the network card, it is difficult to bear hundreds of video data at the same time, so the video server becomes the bottleneck of the whole system;
In a large video management platform, there will be many software function modules, such as webcast, network video, video on demand, alarm network control, etc. There will be many servers, and the most direct impact of this method on customers is to increase server costs. In addition, energy conservation is now advocated all over the world, and a large number of servers are not a green solution in terms of space or power saving;
As the government's attention to security construction continues to increase, video surveillance systems are expanding every year. The number of front-end monitoring points increases, and the storage capacity of the back-end increases proportionally. Similarly, the video management platform should be expanded accordingly. The servers such as video recording and forwarding will also increase accordingly. The entire system will be expanded and expanded in the existing network environment. It will be very cumbersome.
Under such circumstances, how to solve the above problems and provide customers with a solution that is simple to use, low in input cost, and easy to expand?
UIT combines the application requirements of the current monitoring market, and introduces a distributed monitoring solution for storage device embedded platform software, which realizes a network video monitoring storage system integrating storage, recording, forwarding, browsing, downloading, playback, networking and other functions. Its unique distributed networking design concept enables the use of such distributed monitoring and storage systems from building monitoring to sites such as “Safe City†involving networked monitoring systems.
The monitoring distributed video surveillance storage provided by UIT integrates the platform software and storage devices. After the data is encoded, it directly enters the distributed video surveillance storage without going through the video server, and the distributed video surveillance storage will control the entire monitoring system.
Monitor distributed video surveillance storage
UIT monitors distributed video surveillance storage set platform software and disk array as one, supports concurrent storage of images and concurrent on-demand; receives the code stream of the encoder through the network, stores it to high-reliability back-end storage, and supports multiple people at the same time. Image file for retrieval and on-demand playback for distributed deployment; UIT distributed video surveillance storage can install up to 48 SATA/SAS hard disks, supporting RAID0, RAID1 and RAID5; distributed video surveillance storage supports hard disk hot swap, support redundancy Remaining Power Supply, with environmental monitoring unit, providing industrial-grade security and stability to ensure image data security; distributed video surveillance storage concurrent network recording capability up to 100 channels, and can support 100-channel video files on-demand; The designed stream processing buffer algorithm and streaming media architecture can ensure stable and reliable transmission of the recording stream during network transmission. The recording data will not be lost due to network failure and other reasons; UIT distributed video monitoring storage and client Software cooperation, can fully realize digital video recording and playback functions, support multiple storage solutions and record Image mode, support multi-screen simultaneous playback and multiple playback operations, its unique frame marking function, support multi-condition retrieval query.
Monitor distributed video surveillance storage solutions
In view of the characteristics of the network monitoring system and the actual needs of users, the UIT Section has given a solution based on storage and embedded in the monitoring platform management software.
The program has the following characteristics:
The management software part and the storage hardware part are organically combined to take 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, the data stream does not directly enter the distributed storage platform through the video server, so Reduced input costs and improved system performance;
The RAID protection function is provided, and the power supply and the fan are redundantly designed to ensure the security of the monitoring data and the continuity of the external service of the system. The storage capacity expansion function can be added to the storage device through the SAS Cable. Expanding capacity, a single system with tens of terabytes of capacity, will save customers a lot of money, while meeting the capacity needs of the project.
UIT distributed video surveillance storage adopts distributed architecture design. The insistence is that a single distributed video surveillance storage can be self-contained, and multiple stations can be connected into an organic network. Each image node is independent and autonomous. A plurality of image nodes are seamlessly coupled to form a larger local autonomous region, and a plurality of local autonomous regions are coupled into a large image information network.
The system supports the network reconnection function. When the user uses the keyboard or the client to access the image, if the network is interrupted, the distributed device responsible for forwarding the image 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 little image pause feeling, and can normally view the image and perform PTZ control.
UIT distributed video surveillance storage adopts open POSA architecture. With its powerful management functions and compatibility, the compatible products cover almost all mainstream matrix, PTZ control protocols, hard disk recorders, codecs and alarm hosts on the market. It fully protects users' previous investments and builds complex video management systems.
Through the SCM management software, all storage devices can be controlled in one center. When a storage node fails, the SCM software automatically switches to the faulty node. Through the graphical interface, the working status and fault information can be clearly understood.
By adopting 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 and storage management transparent to users. system.
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