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System is dramatically more expensive than a regular IP camera DVR/NVR security camera systems from different vendors require different cameras. Most (old) DVR/NVR security camera systems are CCTV-based with the cameras connected to the recording system via video cables. The signals are compressed and encoded into aĭigital CCTV cameras usually record videos onto a hard drive or a storage server.Ī DVR (Digital Video Recorder) security camera system or a NVR surveillance system is basically a series of security cameras connected to a monitor and recording system. The analog signal must be converted to a digital format this can be done with a video capture card.ĭigital CCTV cameras directly capture images and videos as digital signals. This type of camera records directly onto a video tape recorder. Most of old surveillance cameras are analog cameras. Security cameras enable you to remotely monitor a scene and play back recorded images.Īnalog Closed-Circuit Television cameras record pictures or videos as analog signals. In the last few years, IP-based security cameras have become increasingly popular. Typically, they are connected to a recording device such as a tape recorder or a disk. Security cameras, also known as surveillance cameras, are used to monitor homes, businesses, and other types of properties.