Component video is often labeled Y/Pb/Pr. What are these signals?
“Y” is luminance, or “Brightness”. Basically it describes the level of white (or black) “Pb” and “Pr” are the “color” luminance signals used to derive the levels of Red, Blue and Green color in the video signal. With various levels of red, green and blue any other color can be reproduced. “Pr” is basically the level of Red, while “Pb”; is basically the level of Blue. What about Green?! Green is derived from the levels of red, blue and the overall white level (“Y”), whatever is present in “Y” after subtracting red and blue must be green.
