Digital Video Interface - DVI

Digital Video Interface is a relatively new type of connection that supplies unmatched video quality. DVI maintains the pure video signal in its digital form from satellite and DVI-equipped DVD sources to the TV monitor or projector, thus providing the very best picture quality available.



Since it is a developing technology, there is no universal standard for DVI-cables and we are left with several different types of DVI connections: DVI-I, which supports digital and analog, DVD-D and DVI-A, which support only digital and analog respectively, and Dual-link DVI-D, which supports digital with increased bandwidth. DVI-D cables are used for direct digital connections between source video and digital LCD monitors. This provides a faster, higher-quality image than with analog, due to the nature of the digital format.



All video cards initially produce a digital video signal, which is converted into analog at the VGA output. The analog signal travels to the monitor and is re-converted back into a digital signal. DVI-D eliminates the analog conversion process and improves the connection between source and display. DVI-A cables are used to carry a DVI signal to an analog display. The most common use of DVI-A is connecting to a VGA device, since DVI-A and VGA carry the same signal.



There is some quality loss involved in the digital to analog conversion, which is why a digital signal is recommended whenever possible. DVI-I cables are integrated cables which are capable of transmitting either a digital-to-digital signal or an analog-to-analog signal. This makes it a more versatile cable, being usable in either digital or analog situations. Like any other format, DVI digital and analog formats are non-interchangeable. This means that a DVI-D cable will not work on an analog system, nor a DVI-A on a digital system.



To connect an analog source to a digital display, you’ll need a VGA to DVI-D electronic convertor; to connect a digital output to an analog monitor, you’ll need to use a DVI-D to VGA convertor. Digital Video Interface (DVI) cables may be an option if you need to connect computer monitors or HDTVs for your business.



DVI primarily carries uncompressed digital data to a digital display. In practice, DVI most often connects computers, cable boxes and DVD players to digital displays, projectors and HDTVs. Since DVI carries a digital signal, it’s a better option than analog component and VGA connections.

About the Author

D-V-I is the future of digital and high definition video technology, if you are a PS3 user and are wanting to experience high definition gaming then a DVI-cable is what you'll need.
Buy from a reputable supplier, such as Lindy.co.uk to ensure your cable stands the test of time and doesn't let you down mid-game!

Author Profile: Dave Saltonstall

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