CCTV DVR
Digital Video Recorders (DVR) record video images captured by cameras and stored them digitally on hard disks. Compared to the old medium of video cassette tapes, hard disks are far more superior in the ease of storage, backup and retrieval. And unlike tapes that can go moldy over time, affecting picture quality, hard disk does not have these limitation. It is hence little wonder that the Digital Video Recorders are fast replacing the older Time Lapsed Video Recorders.
There are three types of Digital Video Recorders:
- Embedded DVR
- PC Based DVR
- Network Video Recorder (NVR)
Embedded DVR comes complete with its own proprietary operating systems, Graphical User Interface and display capability and may include interface for mouse, panel and remote controller. It is typically equipped with at least one USB port for backup to thumb drives or other portable external hard disks.
PC-Based DVR are really personal computer installed with system specific video captured cards. The Video Capture Card may support 4 or 8 cameras, and will take up 1 PC Slot. A dedicated DVR software is installed, running on Windows or Linux platform.
Network Video Recorder (NVR) are computers set up as network servers, linked to a group of network (IP) cameras for recording and monitoring of the digital images captured and transmitted by the IP Digital Cameras.
Embedded DVR
Embedded DVR comes equipped to support a fixed number of cameras and cannot be expanded. A 4-Channel DVR by design can only support 4 cameras. If more cameras are needed, you will have to change to a 8-channel DVR or a 16-channel DVR.
All our DVRs support concurrent live view, real-time playback and real-time recording. They utilise H.264 compression techniques, smooth viewing over the internet and 3G network, and can be viewed using Windows and Apple computers and smart phones like IPhone, BlackBerry and Galaxy.
iCatch 411z 4-Channel DVR
4 Channel DVR featuring H.264 4*D1 Real Time DVR, triple streaming for recording, network and Mobile. Support CMS and features Free IVS (Intelligent Video Surveillance) support via CMS for people counting and electric fence. Support 3G Mobile Viewer for iPhone, Symbian, Windows Mobile, Blackberry and Android. Support iPad and Mac System.
iCatch 
811z 8-Channel DVR
8 Channel DVR featuring H.264 8*D1 Real Time DVR, triple streaming for recording, network and Mobile. Support CMS and features Free IVS (Intelligent Video Surveillance) support via CMS for people counting and electric fence. Support 3G Mobile Viewer for iPhone, Symbian, Windows Mobile, Blackberry and Android. Support iPad and Mac System.
iCatch 611z 
16-Channel DVR
16 Channel DVR featuring H.264 16*D1 Real Time DVR, triple streaming for recording, network and Mobile. Support CMS and features Free IVS (Intelligent Video Surveillance) support via CMS for people counting and electric fence. Support 3G Mobile Viewer for iPhone, Symbian, Windows Mobile, Blackberry and Android. Support iPad and Mac
PC Based DVR
AverDiGi NV6000E DVR
Featuring true PCI Express architecture, the AVerDiGi NV6000E Series PC-Based Digital Video Recorder features 16 CH Real Time Recording in 640x480 and 8 CH Real Time Recording in D1 resolution. The AVerDiGi NV6000E Series supports 16 cameras and 16 audio channels per card, expandable to 32 channels. It support both Analog and IP cameras as well as PTZ control with various popular brands of Speed Dome Cameras.
GeoVision GV1480A DVR
The GV-1480 records and displays at a staggering 480 FPS! Perfectly suited for anywhere where a high performance DVR surveillance system is required. Users can remotely monitor camera activity via a browser or network.
Network Video Recorder (NVR)
NUOO NV Series 4/8/16
Linux embedded NVR that support 32 brands of IP Cameras and over 870 models. Based on Server-Client architecture, it support web-based management and can display up to 128 channels of live display on multiple monitors. Playback with 5 intelligent search.