XA - See CD-ROM XA.
XDS - (line 21)
XGA - A video graphics resolution of 1024 x 768 pixels.
XVCD - A non-standard variation of VCD.
Y - The luma or luminance component of video: brightness independent of color.
Y/C - A video signal in which the brightness (luma, Y) and color (chroma, C) signals are separated. Also called s-video.
YCbCr - A component digital video signal containing one luma and two chroma components. The chroma components are usually adjusted for digital transmission according to ITU-R BT.601. DVD-Video’s MPEG-2 encoding is based on 4:2:0 sYCbCr signals. YCbCr applies only to digital video, but is often incorrectly used in reference to the YPbPr analog component outputs of DVD players.
Yellow Book - The document produced in 1985 by Sony and Philips that extended the Red Book compact disc format to include digital data for use by a computer. Commonly called CD-ROM.
YPbPr - A component analog video signal containing one luma and two chroma components. Often referred to loosely as YUV or Y, B-Y, R-Y.
YUV - In the general sense, any form of color-difference video signal containing one luma and two chroma components. Technically, YUV is applicable only to the process of encoding component video into composite video. See YCbCr and YPbPr.
ZCLV - Zoned constant linear velocity. Concentric rings on a disc within which all sectors are the same size. A combination of CLV and CAV.
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