Posted by Richard Crowley on 10/10/06 00:11

"R. Mark Clayton" wrote ...
> This is because for all three systems color was added to existing black
> and white (which is / was the same the world over) on a sub carrier well
> clear of the existing picture signal and sound sub carrier. If you use a
> set in the wrong colour standard you get a black and white picture.

I think Mr. Clayton means that the practice of adding "compatible"
color to existing black and white was the same the world over.
Not that the black and white (pre-color) standards were the same
the world over (which clearly they are not nor ever were.)

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