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The Basics of DVI Standard

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DVI is a well-known form of video interface technology. It is to maximize the quality of flat panel LCD monitors and modern video graphics cards. Before they came into the market, there were short-lived Plug & Display standards. But once DVI came into the market, it replaced them. If we see, most cards include one or two DVI output ports.

 

Apart from used as the standard computer interface, the DVI standard was the method for HDTVs, movies, and DVDs. But if we look at the current market, HDMI cable has taken place for high-definition media delivery. And DVI is more exclusive to the computer market.

 

About the DVI Formats?

 

DVI cables are mostly for direct digital connections between the source video and LCD monitors. It provides faster, high-quality results. With old video cards, digital video signal converts into analog at the VGA output. Then the analog signal travels to the monitor and reconverts the digital signal. With DVI cables, it eliminates the analog conversion. Hence the process improves with better connection between source and display.

 

The Basics of DVI Standard

 

Here are some of the popular types of DVI cables:

  • DVI-D Cables

These are for direct digital connections between the source video and LCD monitors. It provides faster, high-quality images because of the digital format. All video cards initially produce a digital video signal. Then it converts into analog at the VGA output. Then the signal travels to the monitor and the cable converts it to a digital signal. Overall, DVI-D eliminates the analog conversion process and improves the connection between source and display. 

  • DVI-A

If you connect a DVI computer to a VGA monitor, it the perfect cable for your use. They carry a DVI signal to an analog display such as CRT monitor or budget LCD. The most common application of DVI-A is connecting to a VGA device because DVI-A and VGA carry the same type of signal. Otherwise, there would be some loss in the quality of the signal involved. 

  • DVI-I

These cables are capable of transmitting either a digital-to-digital signal or an analog-to-analog signal. This makes it a more versatile cable, usable for digital as well as analog connections.

 

Like any other format, DVI format and analog formats are non-interchangeable. It means that DVI-D cable will not work on an analog system for DVI-A on a digital system. To connect an analog source to a digital display, you need a VGA to DVI-D electronic converter. You will need a DVI-S to VGA converter to connect a digital output to an analog monitor.

 

The Length Considerations

 

According to the official DVI specifications, all DVI equipment must maintain a signal at 5 meters. However, many manufacturers put stronger cards and bigger monitors for maximum length.

 

When a DVI is unstable, you might experience artifacts and “sparkling” pixels. Eventually, you will lose the display. To curb such situations, consider in-house tests on various equipment. Using DVI-I cables at extensive lengths may show a digitally-clear image on your screen. Because analog has a longer run. VGA or HDMI cable is the best choice for long runs.

 

Choosing The Right DVI Cable

 

It is critical to choose the correct type of cable for your products. Make sure to check both of the female DVI plugs to determine what signals are they compatible with.

  • If your one connection is DVI and the other is VGA, DVI is analog-compatible. And you need a DVI to VGA cable or a DVI/VGA adaptor.
  • If both the connectors are DVI-I, you may use any DVI cable.
  • If one connection is analog and the other is digital then there is no way to connect them with a single cable. You will have to use an electronic converter box, such as our analog VGA to digital DVI/HDMI converter.

How To Recognize A DVI Cable

To recognize the cables, the flat pin on one side states whether the cable is digital or analog.

  • A flat pin with four pins is either DVI-I or DVI-A.
  • A flat pin alone states DVI-D.

Its pin sets vary depending on whether the cable is single-link, dual-link, or analog: 

  • Two separated 9-pin sets (rows of 6) for a single-link cable.
  • A solid 24-pin set (rows of 8) for a dual-link cable.
  • A separated 8-pin and 4-pin set is for DVI-A.

Connecting DVI To VGA

 

It depends on the connectors and displays.

 

DVI Source To VGA Monitor:

  1. DVI-I Source: You need a DVI to VGA adapter.
  2. DVI-D Source: You'll need a DVI-D to VGA Video Adapter.

VGA Source To DVI Monitor

 

Here either you'll need either a VGA to HDMI/DVI converter or a DualHead2Go VGA to Dual DVI/HDMI Converter.

 

Choose Your Cable

 

We at SF cable offer a range of DVI cables and HDMI cables for your use. You can check out the options available and choose according to requirements.

 

This blogpost is originally posted here; https://www.sfcable.com/blog/basics-dvi-standard

 
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In our blog, we educate customers on the various types of cables, components and accesscories for computer, laptops and mobiles

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