A DVR (digital video recorder) is a device that works like a video encoder. Using an analog CCTV camera, a DVR obtains an analog video signal which is compressed via H.264 and stored in a hard disk drive.
DVRs rely on a coaxial cable to connect the recorder and camera. While there is backwards compatibility with CCTV cameras, the latest models use new technologies to improve performance and quality. When you look at the latest DVR / NVR debates you’ll see DVRs with HD-SDI and HD-CVI cameras for higher resolution.
NVR: Network Video Recorder
An NVR (network video recorder) records video as it is being relayed over a network cable. An NVR is linked to an IP camera via a LAN or an Internet network. Depending on the set up you may still utilize an IP camera without an NVR. In this instance you’ll need a video management application for IP cameras.
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