The PowerPoint® Blog

Just as a final parting look at all the flavors of DVI, here is a diagram of each connectors pin configuration. The important thing is DVI-A and DVI-I have the four connectors around the slotted connection, while DVI-D does not.

Dual-Link, the simple explanation: for high-resolution displays (eg. 2560×1600).

– Troy @ TLC

This is one to take note of – possibly more than all the previous posts on VGA, DVI, HDMI (and others not discussed such as SDI, etc.). DisplayPort is a NEW display standard that was approved by VESA in May of this year (2006).

DisplayPort is a one-stop connector solution that looks to be implemented across the board on LCD monitors, CRTs, Plasma TVs, projectors, etc. It looks similiar to the HDMI connector and it transmits both high-definition video and multichannel audio.

The reason it looks to be the next big thing is it already has the support of big companies like HP, Dell, ATI, Nvidia, Phillips, Samsung and many others. Remember, you heard it here.

– Troy @ TLC

HDMI stands for “High-Definition Multimedia Interface”. From out perspective it is like combining DVI (high-def video) and high-quality audio into one connector.

This connector is not an option on computer graphics cards. There are a number of DVI-to-HDMI adaptors available. And with its growing use in plasma televisions, home theater systems and even new game systems it may end up on many computers in place of the S-Video connector.

Troy @ TLC

The DVI-I connector is the best of both worlds; digital and analog. But it is also the least common connector, most likely because it is more costly to produce and purchase.

The DVI-I connection is able to go digital-to-digital (like DVI-D) or analog-to-analog (like DVI-A). It has the same appearance as a DVI-A connector, making it difficult to know if it is DVI-A or DVI-I. Basically, if you are lucky enough to have a DVI-I connector on your computer – be happy!

Troy @ TLC

DVI-D is Digital Video Interface – Digital. Using DVI-D is the highest quality image because it is all digital all the way, and there are no exceptions. This is perfect for home theaters, or a big budget shows, where going all digital is ideal.

The real-world trouble with DVI-D is that it cannot be used to connect to an analog source, which is the majority of displays/projectors encountered today. (I should note that I did some research and there are a few DVI-D to VGA converters are out there, but they cost $200+). This limitation of only connecting to other DVI-D equipment is a major limitation for us with the wide range of euqipment we may be using.

Looking at the connector it is easy to see if it is DVI-A or DVI-D. DVI-D does not have the 4 additional connector pins around the slotted connection (on the right side of this image).

Troy @ TLC

DVI-A is a high-def analog signal. DVI-A connectors have the four pin connections around the slotted connector (on the right half of this image).

The conversion from digital to analog occurs in the video card. Technically the overall image quality it is much higher quality than standard VGA. But the reality is, very little difference can be seen with standard definition displays/projectors (eg. 1024×768 or 1280×1024).

The real advantage of DVI-A is its flexibility with hardware connections. It can be connected to DVI devices, or easily converted to a VGA connection with a DVI-to-VGA adaptor (approx. $10).

– Troy @ TLC