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pal has better resolution by about 20%
australia uses the pal format which is virtually the same as secam which is what most of the asian nations use. the pal res is 576pixels of vert res when ntsc is around 480 vert res. most tvs sold in australia have a pal ntsc switch, if set to pal an ntsc tape or dvd will scroll vertically as if your tvs vertical hold is out of sync.
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