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Originally posted by: thejeek
SCART can certainly carry RGB, and Wikipedia confirms it. Do you mean that component video is YPrPb?
Scart can carry rgb (RGB scart) but can't carry component (YPrPb). Scart RGB contains the separate informations for the red, green, and blue as separate channels.
Component video YPrPb (YUV) consists of three signals. The first is the luminance signal, which indicates brightness or black and white information that is contained in the original RGB signal. Monochrome signals contain only intensity luminance information, also called luma. It is referred to as the Y component. The apostrophe indicates that the component is gamma corrected.
The second and third signals are called 'color difference' signals which indicate how much blue and red there is relative to luminance. The blue component is B-Y and the red component is R-Y. The color difference signals are mathematical derivatives of the RGB signal.
Each of the three channels R, G and B include the color signal and the luminance information. Viewing any of the three channels separately, a black and white image is visible, because the Y information is included in all three channels. This is a wast of bandwidth, because it is actually three times the same signal.
By using just a channel for the luminance information and two channels for the color information, bandwidth can be saved by carrying the same information. (component/YPrPb).