Home Theater, DVI Cable Information and Help
By Dustin Twiggs
So What is DVI? DVI Stands for Digital Visual Interface. DVI is the digital interface standard created by the DDWG (Digital Display Working Group). Led by Compaq, Fujitsu, Silicon Image, Hewlette Packard, NEC, Intel and IBM, the DDWG’s main objective is to “address the industry’s requirements for a digital connectivity specification for high-performance PCs and digital displays.”
With the need to accommodate both digital and analog monitors, this new digital interface standard was created to convert analog signals into digital signals. DVI’s High bandwidth capabilities make it ideal for HDTV connections. Also available in dual link, DVI can reach higher resolutions still.
Using the pictures on the right, you can determine the type of connection you need, be it DVI-D, or DVI-I. To determine the actual signal being used you will have to consult your manual for the device being connected. For more information concerning DVI:
DVI-D Digital. Connectors on DVI-D do not have the 4 additional pins, these are meant for carrying Digital signals only. Digital must be connected to Digital and Analog to Analog. While you can plug a DVI-D cable into a DVI-I socket, both devices you are connecting must support Digital signal format. Analog to Digital will not work.
DVI-I Analog or Digital. Connectors are basically the same as DVI-D with the exception of 4 added pins. You’ll notice both have 3 rows of pins to the left, and one horizontal pin to the right. The DVI-I connection has 4 additional pins, 2 on top and 2 on bottom. These pins are used to carry the needed signals for RGBHV analog video. (Red, Green, Blue and Horizontal). You can use DVI-I on both DVI-D and Analog connections, but remember, an analog device will not be compatible with a Digital device. For more pictures of these items visit:
http://www.tca-inc.net/dvi_info.html
Adapters HD15 to DVI-I (VGA to analog) adapters exist to connect your analog device to a analog display through DVI connection.
Remember that while DVI-I is usable for Digital display, the extra 4 pins make it usable for Analog as well. The needed adapters is available in our store.
Remember, this article can be read with pictures at:
Dustin Twiggs Submits articles for the sake of extending human knowledge and benefiting all those who it may. Contact him directly for more info.
Article Source: http://EzineArticles.com/?expert=Dustin_Twiggs
How To Tell Which DVI Cable You Need
By Neil MacLeod Platinum Quality Author
DVI-D cables also know as true digital video cables and are used for a true digital connection between two electronic components (normally a video card and an LCD monitor). All video cards ever created have always been able to create a digital output, the only downside before DVI came about was that this output had to be downgraded to analog before being sent to the monitor – where it was then converted back to digital by the monitor! Using a DVI-D cable means this process isn’t required and therefore the end result is a very quick and extremely high quality visual output.
DVI-A cables also known as high resolution analog cables and are used to transmit a DVI signal to an analog display unit (normally a CRT monitor and becoming more used on HD televisions). Although this type of output isn’t as good as DVI-D (due to the loss of data in the digital to analog conversion processes), it still gives a much improved output than the display from a standard VGA output.
DVI-I cables are capable of transmitting between two devices in either a digital to digital format or an analog to analog format, but (and that’s a big BUT) it will not connect two dissimilar devices (i.e. digital to analog or analog to digital).
Note: DVI digital and DVI analog formats are not interchangeable, basically this means that a DVI-A cable will not work on a digital system and a DVI-D cable will not work on an analog system. You must know before purchasing a DVI cable what format your two devices are, remember that only equipment with a DVI port labeled DVI-I will accept both a DVI-A and DVI-D signal.
So how can you tell what type of DVI cable you currently have? The easiest way is to read the manual for the devices you are connecting, or by looking at the DVI cable. There are two ways to determine what DVI format a device is by looking at the end of the DVI cable face on: 1. There is always a flat pin on one side of the DVI cable, a flat pin alone denotes a DVI-D connector and a flat pin with four surrounding pins can be either a DVI-I or DVI-A connector. 2. The pins on the DVI cable denote whether the cable is single or dual link, 24 pins in 3 rows of 8 means it’s a DVI dual cable, while two lots of 9 pins with a gap in the middle means you have a DVI single link cable. Note: To work out if a cable is DVI-I or DVI-A you need to look at the number of pins on the DVI cable end, 24 pins means you have a DVI-I cable and a set of 8 pins with a gap to a set of 4 pins denotes a DVI-A cable.
Neil MacLeod writes for MK Cables who are an online retailer of DVI cables. With a wide selection of DVI cables always in stock, delivery is fast and almost all cable lengths and types are available.
Article Source: http://EzineArticles.com/?expert=Neil_MacLeod
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