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Digital Video Interface. New standard for plug connections between graphics card and display. There are three DVI variants: DVI-I submits analog and digital video data using one bus. With the help of an adapter DVI-I can be connected to the D-Sub 15 pin port of any standard graphics card. DVI-D transmits digital data only, whereas DVI-A transmits analog data only.
Schematic depiction of the DVI port's pin assignment
Many devices in the AV sector also make use of DVI connections. One can, for example, digitally connect a DVD player to an LCD TV for the purpose of transmitting the video signal free of any quality loss.
Upper left picture: DVI-I input. Bottom left picture: DVI-D input. Right picture: DVI-S 18+1 connector
There is one important aspect that users dealing with digital video signal transmission have to pay attention to: Two devices, i.e. LCD TV and DVD player, either have to both work without HDCP (High Bandwidth Digital Content Protection) copy protection function or the two devices need to both have HDCP implemented. Otherwise the HDCP copy protection will prevent any content from being displayed on the LCD TV.
DVI-D and HDMI are compatible to each other.
For further details, take a look into our dedicated Prad special DVI basics.