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I do know there are variants of SECAM ....mainly to do with the way the color signal is polarised ..vertically or horizontally or something like that .... I believe...
as for PAL ...well PAL G, I etc ...tend to relate to the band allocation ...and sound offset... but are 625 line 25 frame
But then if I remember rightly is it Brazil that has PAL M....525 line 30 frame with PAL color and Argentina with 625 line NTSC?
eeek the variations are endless .....
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........RGBRGBRGB ...colour my world
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