DVI was created as a standard tp provide a high bandwidth, digital interface between a video source and a display device. As part of the standard, a High Bandwidth Digital Content Protection scheme (HDCP) was developed to create a secure link between the source and display. It does not allow recording of the digital signal. DVI delivers video in an un-compressed format, allowing real time complex graphics displays and user interfaces found in program guides and other interactive features for HDTV.
DVI is an interface that allows for the transfer of a digital video signal from a computer to a display, which increases the image quality and performance over a comparable analog system. The white connection seen on the left-hand side of this graphics card's back plate is a DVI connection. DVI is not only being used in computers, but as an interface for televisions to display high quality images from HDTV, DVD, and other digital sources. There are three levels to of DVI connectors: DVI-A (DVI Analog) - this is an analog ONLY DVI connector (you don't get the benefits of the digital signal - fortunately, you really don't see these anymore); DVI-D (DVI Digital) - this is a DVI connector that ONLY puts out a digital signal; DVI-I (DVI Digital OR Analog) - this is the most common connector. It can output a Digital signal or an Analog signal. When using a DVI connector with an analog monitor (either a DVI-A or DVI-I connector), you will usually need an DVI to VGA Adapter, Sometimes this is provided by the video card manufacturer, but often times it is not. When most card manufacturers ads refer to their cards having a "DVI connecter," they most often mean a DVI-I connector.