Network video recorder (NVR)

 

NVR is defined as network video recorder, a device for recording digitised IP video streams, originating either from analogue cameras connected via IP encoders and/or IP cameras where the IP video streams are created inside each camera. NVRs are characterised by having the following internal components.  * Digital storage, usually hard disks, where the digital IP video signals are stored ready for use. * A database, relating the digital information to references; time, alarms and other metadata, so that the video information required can be retrieved and displayed quickly and easily. * Digital to analogue conversion and replay controls. These are usually found more in smaller, standalone NVRs and less common within enterprise level NVRs * An operating system, which runs the whole NVR. * A computer network interface, which is the primary input for IP video streams in to the NVR and also the primary way of connecting playback equipment in large systems.