Refers to the y coordinate in Cartesian geometry. The y coordinate describes vertical placement in motion effects.
YcrCb
The color space in which digital video formats store data. Three components are stored for each pixel one for luminance (Y) and two for color information, Cr for the red portion of the color difference signal and Cb for the blue color difference signal.
YUV
The three-channel PAL video signal with one luminance (Y) and two chrominance color difference signals (UV). It is often misapplied to refer to NTSC video, which is YIQ.