CVR English name is (Central Video Recorder), also known as the center-level video network storage device, is a generic name for a class of security video surveillance special equipment developed from the enterprise-class standard IPSAN NAS network storage devices combined with video surveillance applications.
First, what is CVR?
CVR English name is (Central Video Recorder), also known as the center-level video network storage device, is a generic name for a class of security video surveillance special equipment developed from enterprise-class standard IPSAN/NAS network storage devices combined with video surveillance applications.
Second, the development of CVR
Network high-definition video surveillance solves the most important problem of analog surveillance video, “there is no detail in the plotâ€, and it also challenges network, storage and other supporting facilities. With the explosive growth of digital high-definition, the demand for storage capacity has grown geometrically. For example, when the capacity of two million HD IP cameras 1080P is set to 6 mbps, the capacity is calculated as follows: 6Mb/s ÷ 8bit for Byte × 3600 seconds × 24 hours × 30 days ÷ 1024MB for GB = 1898.44GB; that is to say each channel 1080PIPC storage 30 days of space need 1898.44GB, converted to TB is 1.85TB, it has already slightly more than 2/3 of the available capacity of a 3T disk.
From the perspective of capacity, small-bay storage products (such as less than 8 disks) are limited by the number of cameras they can store, so the market demand for large-disk storage products is increasing, so many manufacturers have introduced 8 The inventory NVR, 16-bay NVR, and 24-bay NVR meet the rising demand for capacity.
However, merely increasing the number of discs actually does not solve the problem. Embedded NVRs are often unable to meet the application requirements, because with the increase in capacity, practical applications are proposed for performance, redundancy and reliability, manageability maintainability, etc. higher requirement. Therefore, the industry has turned its sights to the original high performance (enterprise-class general-purpose processor), high reliability (RAID disk redundancy, network redundancy, power supply redundancy, fan redundancy), high manageability and maintainability (standard Industrial-grade standard IP SAN/NAS network storage devices for industrial components, standard management protocols, and interfaces.
IPSAN/NAS network storage devices, which were originally standard IT devices, do not have video surveillance capabilities and need to be installed behind servers (servers install video surveillance software). With the development of technology, integration of monitoring and IT, the industry gradually installed various security video surveillance software modules on IPSAN/NAS network storage devices by removing intermediate servers and gradually formed a central level of different functions for the Central Video Recorder (CVR). Video network storage device.
Third, the application of CVR
Because the high-end segments of security video surveillance require higher reliability (typically through Raid disk array to achieve higher reliability protection data is not lost), especially in the safe city monitoring, intelligent Traffic Surveillance, Rail Traffic Monitoring, Freeway Surveillance, Safe Campus Monitoring, Hospital Security Monitoring, Race Security Monitoring, Wenbo Security Monitoring, Financial Security Monitoring, Prison Security Monitoring, Judicial Security Monitoring, Energy Power Security Monitoring, Large Enterprise Security Monitoring, Government Security surveillance, public security surveillance, and large-scale public facilities such as high-end security video surveillance market segments favor CVR products.
Fourth, the function of CVR
By installing different security video surveillance software, CVR can realize: video stream direct write (also known as streaming media write, RTSP/ONVIF/PSIA/SIP (GB/T28181) and other streaming protocols), iSCSI data block write ( Also known as IPSAN write-through), standard storage server + IPSAN mode, standard NAS protocol (NFS, CIFS) and other modes, it can also add management servers to form a network video surveillance cloud storage system.
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