ATI RADEONX1900 User Guide - Page 38
VGA Connector, YPbPr, Z-buffer
UPC - 727419413893
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34 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 15pins 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.