DVR stands for Digital Video Recorder, function of Parliament is to perform image recording media into a digital format to a disk drive, USB flash drives, memory cards and others. DVR not only exist in the CCTV system and is widely used for consumer digital video recorder. Before the DVR has no predecessor VCR (Video Casete Recorder), VCR using videotape as a storage medium.
In the CCTV system, DVR is a system and a device used to record all the images sent by CCTV cameras. In the DVR will be many find menu functions that can be used for the setting and control over much of the CCTV system, some functions include control over the quality of the video image, video formats, video resolution, Internet connectivity and network, Backup, and others.