DVR system - A digital video recorder, or a DVR, is a device that records video in a digital format to a hard drive or any other memory medium within the device, such as an SD card. The term includes stand-alone set-top boxes, portable media players, and software for personal computers. This makes it so you can capture and playback video to and from the disk. Some consumer electronic manufacturers have started to offer televisions with DVR hardware and software built in to the television itself. It is also the most popular way for CCTV companies to record their surveillance since it provides people with longer recording times than the previously used VCRs. For detection and documentation purposes, digital video recorders configured for physical security applications record video signals from closed circuit television cameras. Many are designed to record audio as well as video. DVRs become systems that provide services that exceed the simple recording of video images that was previously done through VCRs. A DVR CCTV system provides a several advanced functions over VCR technology including video searches by event, time, date and camera. There is also much more control over quality and frame rate allowing disk space usage to be optimized and the DVR can also be set to loop record when the disk becomes full. In some DVR security systems remote access to security footage using a PC can also be achieved by connecting the DVR to a LAN network or the internet. Security DVRs are either PC based or embedded. A PC based DVR’s architecture is a classical personal computer with video capture cards designed to capture video images. An embedded DVR is designed as a digital video recorder with its operating system and application software contained in firmware or read only memory.