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DVI
Last modified: Friday, July 30, 2004 

(pronounced as separate letters) (1) Short for Digital Visual Interface, a digital interface standard created by the Digital Display Working Group (DDWG) to convert analog signals into digital signals to accommodate both analog and digital monitors. Data is transmitted using the transition minimized differential signaling (TMDS) protocol, providing a digital signal from the PC's graphics subsystem to the display. The standard specifies a single plug and connector that encompass both the new digital and legacy VGA interfaces, as well as a digital-only plug connector. DVI handles bandwidths in excess of 160 MHz and thus supports UXGA and HDTV with a single set of links. Higher resolutions can be supported with a dual set of links.

(2) Short for Digital Video Interactive, a now-defunct technology developed by General Electric that enables a computer to store and display moving video images like those on television. The most difficult aspect of displaying TV-like images on a computer is overcoming the fact that each frame requires an immense amount of storage. A single frame can require up to 2MB (megabytes) of storage. Televisions display 30 frames per second, which can quickly exhaust a computer's mass storage resources. It is also difficult to transfer so much data to a display screen at a rate of 30 frames per second.

DVI overcomes these problems by using specialized processors to compress and decompress the data. DVI is a hardware -only codec (compression/decompression) technology. A competing hardware codec, which has become much more popular, is MPEG. Intel has developed a software version of the DVI algorithms, which it markets under the name Indeo.

(3) Short for Device Independent, a file format used by the TeX typography system.

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L-com Connectivity: DVI & HDMI Cables and Equipment - Manufacturer of DVI/HDMI cables and adapters, and distributor of active equipment including extenders. Provides detailed tutorials and information.


For internet.com pages about DVI . Also check out the following links!

Related Links

HDCP: What It Is and How To Use It 
April 2002 article from EDN Access gives a comprehensive explanation of HDCP, including diagrams and the mathematical calculation used to encrypt the digital data.

Digital Visual Interface (DVI) Explained & Improving GeForce2/3 Image Quality
A 2002 article from AnandTech.

Sponsored listings

Better Cables: DVI-D Cables - Offers DVI-D cables for connecting high definition set-top boxes, dvd players, scalers, PCs, and any device with the all-digital DVI-D connections.

Cables To Go: DVI Cables - Big selection of DVI Digital Cables from 0.5 to 20 meters. Plus DVI KVM switches, DVI splitters. Same day shipping if ordered by 4 pm.

PC Cables: DVI Cables - Over 500 in stock - hard-to-find computer cables and small parts. Online ordering and fast delivery. First on the Net in 1996 for cables.

Custom Cable Connection: ViewSonic DVI Digital Cables - Online seller offers ViewSonic DVI digital cables, including adapters, bulk cables, CATV/SATV, connectors, PCMCIA cables, and fiber cables.

QVS: Digital DVI Splitters - Manufactures cables and connectivity products for the computer and communication industries. Items include video splitters and switches.

related categories

Standards

Video Formats

related terms

CD-I (Compact Disc-Interactive)

CD-RW disk

codec

DVD

HDCP

HDTV

Indeo

Intel

MPEG


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