The most common physical connector for VGA signals is an
HD15??”a high density, 15-pin mini D-shaped connector. ???VGA??? comes from
video graphics array, which is the name of the original IBM graphics card that
used this connector.
Digital Visual Interface (DVI)
A modern connector that supports analog signals, digital signals, or both. DVI-D
includes digital signals only; DVI-I includes both; and the unofficial DVI-A connector
includes analog only.
DVI-I and DVI-A can be connected to VGA equipment through a simple
adapter. Where possible, though, the digital signal should be used for greater
accuracy and clarity.
DVI-D supports dual-channel connections for high-resolution displays (above
1.25 megapixels) and may use high-bandwidth digital content protection (HDCP)
signal encryption.
1.10
1.10 Display Hardware 17
High Definition Multimedia Interface (HDMI)
HDMI provides an easy-to-use single connector that incorporates a DVI-D compatible
digital video signal and digital audio. It is common on high-definition
television equipment and monitors, but so far is not used often on computers.
HDCP may be used with HDMI. There are two connectors in use: Type A,
which supports single-channel connections, and Type B, which has additional
conductors to carry a dual-channel signal.
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