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Products : DVR

DVR

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 medium. It has also become the main way for CCTV companies to record their surveillance, as it provides far longer recording times than the previously used VCRs.

While the predecessor equipment was CCTV monitors plugged into Time Lapse Recorders, the latest digital video surveillance technology relies upon PC-based software which operates in conjunction with DVR cards (video cards which are present in the Digital Video Recorder (DVR) system.

There are two types of DVR's (Digital Video Recorders). They are either stand alone devices or hard drives that are connected to a computer system. DVR's work similar to VCR's except the images they capture from the CCTV camera is digital. The amount of digital images you can capture on a DVR is determined by a few factors including the frames per second recorded, the amount of cameras hooked up to the DVR device, the resolution that the DVR saves the images at and the video compression used (e.g. MPEG4). For a common set up, where you have 4 cameras shooting at 30 fps and you use an image resolution of 320 X 240, each camera only records when motion is on, and you use MPEG4 compression, you should be able fill up a 20 to 25 GB hard drive in about 80 hours.

How does a CCTV Digital Video Recorder works?

A CCTV Digital Video Recorder is essentially a computer that saves security images to a hard drive.Most security cameras in use today capture an analog picture. The DVR converts analog signals to digital signal and then compress it. many cameras can be connected to one DVR.DVR generally can come with 4,8,16 and 32 camera inputs.the DVR will allow you to view all of these images at once time or one at a time and all of the video saved to the hard drive.Additional switches,quads,and multiplexers are not required.

Digital video recorder server- digital technology Digital video recorder servers typically have four, nine, or sixteen security camera inputs, giving you the flexibility to implement whatever camera system suits you best.

Other great benefits and features include:

  • Remote access at all times
  • Better pausing for still images
  • Improved storage, especially over long periods of time
  • Easy installation
  • Clear image copying
  • Long recording times
  • Internal web server
  • Picture in picture and zoom
  • Hard drive for storage


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