DVI Video Data Transfer - The Digital Visual Interface, DVI, uses a digita
l protocol through which the pixels illumination is transmitted as binary data.

DVI Video Data Transfer

When the display runs with its standard resolution, it will decode each of the numbers and will apply the
needed brightness to the corresponding pixel. And because of this method, every pixel from the output buffer
of the device source corresponds straight to one pixel in de digital display. Whereas with the analog signal
the appearance of every pixel can be affected by its nearest pixels and by analog distortion and some
electrical noise.

DVI connector includes pins directly for the display data channel, the same as VGA or SVGA connectors,
and this allows the graphics adapter to decode the extended display identification data of the monitor.

Usually, the cable lenght can be up to 4 meters and can display resolutions of 1920 x 1200. Longer cables can
be used, up to 15 meters, but the display resolution will decrease, because of signal loss. However, if a DVI
booster will be used, the lenght of cable can be even higher, and without any loss in resolution.
These DVI boosters can have an external power source.


The DVI connectors are of four types:

The DVI connectors are of four types:

DVI-A - Analog
DVI-D - Digital
DVI-I - Digital and Analog
M1-DA - Digital, Analog and USB

Sometimes, the DVI connector can include pins provision for a second data link used for very high
resolution displays, but not all devices implemented this function.

DVI is the only standard who supports both digital and analog transfer on the same interface,
and DVI-Enabled computers can use many types of HDTV TV displays.
DVI is also almost fully compatible with HDMI.