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As far as I can recall about color broadcasting, there were three methods that we ddiscussed. Two are still used today, but only one for commerical broadcast. The one we use here is NTSC (Never The Same Color) with a 3.58 mhz burst signal. The second, still in use, but not for commerical use, was by CBS, which used a color wheel to get correct colors. NASA still has them. The last, but not least, was the thought of using a black and white set to use the full spectrum of light that was available to do "color". If I recall, the only color produced was green and it was a picture of a Coke bottle and it had a fair amount of noise in the picture, most likely the bottle, too!
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