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DVI
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(1) (Digital Video Interactive) An earlier compression technique that provided up to 72 minutes of full-screen video on a CD-ROM. Acquired by Intel in 1988 from RCA's Sarnoff Research Labs, Princeton, NJ, DVI never caught on.

(2) (DeVice Independent) The primary TeX output format. DVI files are not dependent on a particular type of hardware. See TeX.

(3) (Digital Visual Interface) A standard interface to a digital display system. DVI sockets are found on flat panel monitors and TVs, DVD players, data projectors and cable TV set-top boxes. Using TMDS signaling, DVI was introduced in 1999 and within a short time superseded the other emerging digital interfaces. DVI supports High-bandwidth Digital Content Protection, which enforces digital rights management (see HDCP).

DVI A and D Connect to DVI-I
There are countless computers in existence with analog display adapters, but flat panel monitors are digital. Converting to analog in the computer and back to digital in the monitor degrades the result, and images are not as sharp. DVI-I (integrated) sockets on monitors accept analog VGA signals from the computer using a DVI-A plug or digital DVI signals using a DVI-D plug.

Single and Dual Link
Single link DVI uses a 165 MHz transmitter to provide resolutions up to 1920x1080 at 60Hz. For higher resolutions, starting with 1920x1080 at 85Hz and upwards to 2048x1536 and 2560x1600 pixels, dual link DVI is required (two transmitters). For more information, visit the Digital Display Working Group (www.ddwg.org). See HDMI-DVI compatibility, UDI, flat panel display, TMDS and LVDS.




DVI Connectors
DVI plugs and sockets use twisted pins on a 45 degree angle. DVI-I (Integrated) sockets accept both analog and digital signals. Single link DVI uses one 165 MHz transmitter for resolutions up to 1920x1080 at 60 Hz. Dual link DVI uses two transmitters for higher resolutions.





DVI and VGA Outputs
Many display adapters include VGA and DVI outputs in order to ease the transition to all-digital interfaces. (Image courtesy of NVIDIA Corporation.)
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