What is the difference between Y,Pb,Pr and RGB?

RGB stands for red, green and blue: the base colors from which all the colors your television monitor can display are derived. The HDD200 decoder offers RGB + sync (horizontal and vertical sync) connections so you can use front projection and professional quality CRT monitors to display the high definition image.

RGB Cable

A new interface is also supported. This is called YPbPr (also known as 770.3 or component in) and is the HDTV equivalent of an S-Video connector. YPbPr transmits the picture information in a luminance and phase-opposite chrominance pair over three coax cables. Most new HDTV monitors offer YPbPr connections.
YPbPr Cables