A digital Video Recorder (DVR) or personal video recorder (PVR) is a device that records video in a digital format to a disk drive or other memory medium within a device. Television and video are terms that are sometimes used interchangeably, but differ in their technical meaning.

Video is the visual portion of television, whereas television is the combination of video and audio modulated onto a carrier frequency (i.e., a television channel) for delivery. Most DVRs can record both. Digital video recorders configured for physical security applications record video signals from closed circuit television cameras for detection and documentation purposes.

Many are designed to record audio as well. DVRs have evolved into devices that are feature rich and provide services that exceed the simple recording of video images that was previously done through VCRs. A DVR CCTV system provides a multitude of 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 overwrite the oldest security footage should the disk become 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.

Features of DVR Systems
» Superior video and audio quality
» Easy-to-handle smaller form-factor disc media, and more durable than magnetic tape.
» Random access to video chapters without rewinding or fast-forwarding
» Onscreen multilingual subtitles and labeling not available on VCRs
» Reduced playback wear and tear
» High-quality digital copying, with little or no generation loss
» Improved editing, at least on rewritable media
» Playlisting
» No risk of accidentally recording over existing content or unexpectedly running out of space during recording
» Easy to find recordings due to chapter menus
» Not as reliable with DVD rewritables as DVDR's due to disks being more difficult to read and write on and unformattable and unwritable disks are likely to happens some of the time.

Standalone Digital Video Recorders
1093/304
Digital 4-channel Networkable DVR with USB and LAN, Looping, Mpeg4, Motion detection feature, Supports 1 SATA HDD, 1 USB Drive, comes with remote control, Supports Mobile View software. HDD not included
» 4 video composite inputs video composite / 1 VGA outputs
» Display Resolution - 720 x 480 / 720 x 576
» Video Compression: Mpeg4
» 25 fps recording per video channel
» Recording at CIF - 100fps or D1 - 50fps

1093/004 Digital 4-channel Networkable DVR with USB and LAN, Remote Control, Motion detection feature, Supports 1 SATA HDD up-to 1024GB, 1 USB Drive, Supports Mobile View software. HDD not included, Supports TCP/IP, DHCP, UDP, DDNS, PPPOE network Protocol, Support preview live display remotely via mobile phone and real time monitoring via IE based browser and/or network, and support parameter setting of DVR remotely.
» 4 Audio & Video inputs
» 2 video composite / 1 VGA outputs / 2 Audio output
» Display Resolution ­ D1 (704 x 576)
» Video Compression: H.264
» 25 fps recording at D1, 50fps at HD1 and 100 fps at CIF
» Recording Resolution: CIF(352*288), HD1(704*288), D1 (704*576)

1093/7008V Digital Networkable DVR H.264 compression with remote , Recording based on Continuous, Motion, Scheduled or alarm, Remote backup through TCP/IP, Client software included, 8 In/2 Out alarm, HDD not included.
» 8 video composite inputs
» 1 Video / 1 VGA output
» Display Video resolution-(704x576)PAL, VGA Display-1024x768
» 25 fps recording per video channel
» Recording at 200fps @352x288(CIF)
» Playback 4 Channel at the same time
» up-to 2 SATA HDD With remote control
» backup by USB or CD/DVD
» PS2 interface for keyboard / mouse
» Dimension: 405(L) x 310(H) x 55(W)mm.

1093/7008AV 8 Audio Inputs / 1 Output.
1093/7016V 16 Video Inputs, 16 alarm inputs, total 400 fps.
1093/7016AV 16 Audio Inputs / 1 Output.

1093/043S Digital 16-channel video recorder with USB and LAN & matrix, H.264 Compression, Full screen and multi-screen display, Selectable recording speed, Recording mode: continuous, motion detector, programmed or alarm, - Motion detector, Remote recording back-up via TCP/IP, Front control panel, Compatible with Easy Dome (II and III) and Thera, Client software included, Simplified on-display screen menu with advanced submenus
» 16 video composite inputs
» 1 composite video output / 1 VGA / 1 Audio / 4 Aux outputs with matrix function
» 25 fps recording per video channel
» Recording resolution: 352 x 288 CIF, 176 x 144 QCIF
» 16 alarm inputs, 1 relay alarm output
» 25 fps recording per video channel
» RJ45 RS485 / RS232 communication port
» RJ45 10/100M UTP network interface
» Back-up by means of DVD-W and USB 1.1 port
» 4 IDE for connecting up to 8 HDD
» Dimensions 450 (W) x 450 (H) x 95 (D) mm

DSS5000/16 16 channel digital video recorder, MPEG-4, M-Jpeg & H.264 Compression - Resolution up-to 720 x 576 with 160 GB hard disk Expandable up to 2 terabytes and built in TCP/IP,HTTP interface. Provide real-time viewing and recording of the camera images @ 200 fps. Complete with Windows operating system keyboard, mouse, DVD burner, built in alarm contacts & relay outputs, Various Back Up OPTIONS, P/T/Z Control, Triple-X Operation, Dynamic IP Support, OSD Language, Multi-Area Motion Detect, POS Transaction recording with image. Dimension 520(W) X 430(D) X 177(H) mm.
DSS5000/8 8 channel digital video recorder,
DSS6000/16 16 channel digital video recorder, Total 400 fps.
DSS6000/32 32 channel digital video recorder, Total 800 fps.