DVI (Digital Video Interface) is a very popular type of video interface technology, which is meant to optimize the quality of digital display devices such as flat panel LCD and video graphics cards etc. They are ahead from Digital –only DFP format for older flat panels. Due to the increasing popularity of DVI cables, most cards now include both a VGA and a DVI output port.
The three types of DVI cables are: 1. DVI – Digital 2. DVI – Analog 3. DVI – Integrated (Digital and Analog) A DVI – D cable works with digital systems and a DVI – A cable work with Analog systems. They are not interchangeable but a DVI – I cable is more versatile and work with both Digital and Analog system. The data format in DVI is based on PanelLink serial format which uses Transition Minimized Differential Signalling (TMDS). The digital formats are available in two types (Single Link and Dual Link). The resolution of dual link is more (4 Mega pixels) as compared to single link (2.75 mega pixels. DVI-cables are faster and provide good quality videos as they do not require multiple conversions of signals. This help to maintain quality of videos and avoid ghosting.
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