ATI Technologies RADEON X1900 G5, User Manual

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VGA Connector
A type of graphics connector, sometimes also called an analog connector.
It is the most common type of video connector available, consisting of 15-
pins set in three rows. The “VGA” is an acronym for “Video Graphics
Array,” which is also the name for the video resolution mode of 640x480
pixels, the lowest standard resolution supported by virtually all video cards.
YPbPr
A type of analog composite video signal that splits and compresses the
standard Red/Green/Blue (RGB) colors of a television signal into separate
luminance and color values. The “Y” stands for the luminance channel,
while “Pb” and “Pr” represent the blue and red channels respectively, both
of which have the luminance value subtracted from them. It is an equivalent
color space to the chrominance-based YCbCr, which is used for digital
video.
Z-buffer
The portion of video memory that keeps track of which onscreen elements
can be viewed and which are hidden behind other objects. In the case of a
3D image, it keeps track of which elements are occluded by the foreground
in relation to the user’s perspective, or by another 3D object.