If you are looking forward to install a surveillance system at home or office, you are bound to come across something called a DVR card. This card is nothing but a device that captures videos. When this card is installed in the computer, your computer will start functioning like a digital video recorder. These cards have a variety when it comes to sizes; they also come with multiple connecting options. However, DVR cards are extensively used for entertainment purposes; a computer DVR on the other hand is popular among big business houses and other institutions. They are used along with cameras for security and surveillance.
Maximum DVR cards are internal and Peripheral Component Interconnect (PCI) Style. The card is installed in the PCI slot that is available in the rear of a computer. The cards have multiple connections that become a part of the rear of the computer after installation
A DVR card has a minimum of 4 and a maximum of 32 channels. It mostly has an individual port; may also have a VGA or a DVI port. The VGA and the DVI are comparable to cable connections as they are connected to the monitors for digital transmission. A card with VGA/DVI needs an adaptor that has a connector for the same with additional video ports. This adaptor should be purchased along with the card.
Computers that have a DVR card installed are very much in use for the surveillance. This is made possible along with the use of closed circuit cameras and other required equipment. The channels in the DVR card allow a number of cameras to connect to the system. The DVR cards also come with special surveillance software that facilitates recording and visuals from one central point.
This card makes use of so many resources of a computer that many a times a system has to be exclusively used for recording alone. Other program running on the system may not leave enough memory for the DVR card to function. Some DVR cards use special software as they are not compatible with every kind of software
Most of these cards are not adept to record both audio and video together. For audio recording, a DVR card must have a separate port. The cards that record audio are usually the ones that have an adaptor along with DVI/VGA connections, an adaptor each for audio and video
These are the basics of a DVR cards and its use in the surveillance system.