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Originally Posted by Invicta59
The idea of component,as I understand it, is to provide a digital signal from source to monitor.
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No, Component Video is another 3-wire analogue format like RGB. Any difference in quality between Component and RGB is marginal. The three Component Video signals are Luminance (Y), the old black-and-white signal, and two colour differences, R-Y, and B-Y. The green signal is recovered by subtraction. Component Video is closer to the video signals coded in DVDs and digital TV, while RGB is closer to the video signals needed for display devices such as CRTs, LCDs, and plasma displays.
For reasons of historical accidents of fate, Component Video as a means of passing 3-wire analogue colour signals between consumer video devices is dominant in North America, while RGB is dominant in Europe, partly because of the introduction of the SCART plugs and sockets by the French.
Component Video standards have been upgraded to accommodate HDTV, but RGB has not. But by the time we in Europe get HDTV, it is possible that all-digital connections such as HDMI will have taken over, so we might never need to convert to Component Video interconnects from RGB.