DVR network output

As you saw earlier, a DVR converts the analog camera signals into a digital format so it can be recorded on an internal hard drive, but not only that, the DVR also has a digital output that allows sending the camera images over a computer network and the Internet.

See the following image that illustrates the concept.

Note in this picture that the analog cameras are connected to the DVR that receives the signals in traditional analog format with 600 TV lines (TVL) that are converted to the digital format 4CIF that represents 704 x 480 pixels horizontally and vertically respectively.

This video in digital format is displayed on a computer screen with specific software, note in the diagram that there is a blue cable (network cable) connecting the digital output of the DVR to a computer.

It is also possible to connect a coaxial cable from the DVR to an analog monitor and also obtain a traditional analog video output with the 600 TV lines.