Digital Visual Interface

related topics
{system, computer, user}
{@card@, make, design}

The Digital Visual Interface (DVI) is a video interface standard designed to provide very high visual quality on digital display devices such as flat panel LCD computer displays and digital projectors. It was developed by an industry consortium, the Digital Display Working Group (DDWG) to replace the "legacy analog technology" VGA connector standard.[1] It is designed for carrying uncompressed digital video data to a display. It is partially compatible with the High-Definition Multimedia Interface (HDMI) standard in digital mode (DVI-D), and VGA in analog mode (DVI-A).

Contents

Overview

The DVI interface uses a digital protocol in which the desired illumination of pixels is transmitted as binary data. When the display is driven at its native resolution, it will read each number and apply that brightness to the appropriate pixel. In this way, each pixel in the output buffer of the source device corresponds directly to one pixel in the display device, whereas with an analog signal the appearance of each pixel may be affected by its adjacent pixels as well as by electrical noise and other forms of analog distortion.

DVI to HDMI

DVI is mostly compatible with HDMI. The main difference is that DVI typically carries no audio data in its TMDS channel, although increasingly, modern PC video hardware is providing audio (e.g., cards by NVIDIA[2] and ATI[3]), allowing the PC to send audiovisual data through a DVI cable to a high definition television with an HDMI input. If a PC's DVI output does not support HDMI audio, an adapter may be required to combine the DVI video signal with analog or digital audio. Since HDMI carries digital audio interleaved with the video data, these adapters can be relatively expensive (e.g., Gefen DVI w/Audio to HDMI[4]).

Full article ▸

related documents
Apple Desktop Bus
High fidelity
Exidy Sorcerer
Disk image
Signaling System 7
GE-600 series
Computer display standard
Wormhole switching
Magnetic tape
Multicast
LAN switching
Video CD
Blue Gene
HyperTransport
Bally Astrocade
TOPS-20
Wikipedia:Federal Standard 1037C terms/telephony terms
Computer networking
Audio amplifier
Video on demand
Data Link Layer
Gigabit Ethernet
File server
DirectX
Internet Message Access Protocol
IBM System/370
WAV
DDR SDRAM
DivX
Address Resolution Protocol