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  • Security surveillance camera main storage mode and characteristic


        The main features of the video surveillance system in the security industry is the image huge amount of information required to have enough storage space. Unlike other systems, video surveillance systems generally have more monitoring points, the video data stream, stored for a long time, 7 × 24-hour operations.
        Stored in the field of video surveillance and video monitoring their own development are closely linked. Experience a simulation of video surveillance, digital network in three stages, are stored in the field of video surveillance has also experienced analog, digital, network, these three stages. With the increasing popularity of high definition technology, the application of HD IP camera for monitoring the storage products and technologies, new requirements.
        The main form of storage including the storage of video surveillance DVR, NVR, IPSAN three, in accordance with transport protocol points, can be divided into the file transfer protocol, the data block transfer protocol, streaming media protocol three. With the upgrade of customer needs and technology trends, storage and application of the security industry is also derived from a variety of modes.
        Patterns and characteristics of the security industry, the typical storage applications
        DVR storage
        Video surveillance into the digital age, the most typical storage applications, Digital Video Recorder (DVR), built-in hard drive for image storage. DVR storage, once occupied more than 90% of the share of video surveillance storage is cheap, mature technology, advantages, easy to use, can be operated by remote control and keyboard, plug and play.
        With the expansion of monitoring extended storage mode in DVR mode, eSATA, USB and other storage protocol extensions, suitable for small and medium-scale deployment of surveillance video data through RAID (independent redundant disk array) technology in the reliability on a certain guarantee. But the pattern is directly connected, can not be shared and extended low, is still not suitable for large-scale data storage.
        With the popularity of network DVR evolve into small NVR and hybrid DVR can support analog, IP cameras. However, due to poor DVR its reliability and sharing subject to the limitations of capacity and performance, the camera connected to large ones limited, so the only widely used in small-scale, distributed systems for local and stand-alone stores.
        IPSAN / NAS Network Storage
        After the network era in video surveillance, network storage plays an increasingly important role. In the medium-scale video surveillance projects, with the monitor front-end increase in the number, especially the front of the large-scale use of the definition network cameras, storage capacity, rapid growth, the scale of the rapid increase in the number of storage devices.
        Through the central business platform for centralized management and control, network video servers and IP cameras for the front-end IP SAN / NAS network storage back-end network video surveillance system to be widely deployed.
        Network camera or video encoder on the acquisition of video coding to compress uploaded to the central platform video server (the larger the sub-center platform), the video server video packet processing and then sent to the IP SAN / NAS for storage. Client or television wall To access the playback the related video resources through storage -> video server -> client or the process of the video wall, all the video streams go through the video server to forward.
        Compared with the previous DVR storage, IP SAN / NAS storage advantages more: large capacity, high performance, the number of cameras supported; use of RAID technology and redundant design, high reliability; space unified management, to facilitate sharing; scalability easy to upgrade, and deployment flexibility.
        Reasonable framework, the expansion of flexible, clear layer, based on IPSAN / NAS build network video surveillance system has become the main form of video surveillance systems are widely used in the "Green City" front-end equipment, large-scale access and high-capacity centralized storage the needs of the environment.
        NVR storage
        IP SAN / NAS storage, video storage, forwarding, playback to go through the video server, video server performance and stability bottleneck; IPSAN / NAS are common standard network storage, it is difficult to meet the security user customization needs;
        X86 architecture-based IP SAN / NAS, its own unique open system design to promote a new mode of application is the NVR storage, such as the UIT application storage SV1000 Series can be video surveillance platform management software embedded in the internal operation of the SV1000 storage and become integrated application storage platform.
        IPSAN-based NVR storage, storage hardware platforms and storage management system, security and stability of the mature and effective to ensure the safety and reliability of the system is running; using RAID technology, component redundancy to ensure high system availability, and fast data recovery in order to ensure the security of data; compatible with various types of front-end video access through a variety of techniques.
        In this way eliminates the need to monitor the platform server, video server and storage equipment integration, providing customers with cost-effective solution to deploy a more flexible and convenient, but also by a wealth of software features and their matched to meet diverse needs.
        The NVR stream media storage
        IPSAN / NAS network storage with high cost-effective advantages in video surveillance widely used, but there are also some disadvantages, such as: video server performance bottleneck and single point of failure risk; cycle overwritten resulting in a large number of file fragments, resulting in lower storage performance ; suddenly when power is likely to cause file system damage resulting in loss of data.
        In order to improve and solve these problems, the birth of streaming media direct deposit the Figure 2IPSAN/NAS network storage application schematic diagram 3NVR storage Application Diagram. ONVIF standards also contributed to the integration between the different brands of IP video monitoring equipment to ensure product interoperability. NVR-based streaming media storage architecture is becoming increasingly popular.
        In this memory architecture, the network camera or video encoder collection of video compression coding processing directly to the video stream sent to the storage device. The client or the TV wall To access the playback the related video resources, video information by the storage device delivered directly to the client or the TV wall. Write and playback of video stream forwarding platform. Interactive platform in the middle of the main responsible for signaling and management and control of the business.
        The NVR stream media storage architecture advantages are: the stream front storage device or from a storage device to the client / TV wall does not require the video server, storage device directly to the processing of streaming media, is equivalent to the local storage, enhanced reliability. From the collection, transmission, storage, playback streaming the entire performance, stability and efficiency compared to traditional storage model has an advantage.

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