At 11:04 01/05/01 +0100, Ciaran Cooney wrote:
>On Tuesday 01 May 2001 10:51, Jerry Walsh wrote:
> > It's half that? you're saying its 25hz and 50hz when interlaced?
> > Hertz and frames aren't the same thing - Hertz is per second,
> > so if you get a half a frame 25 times per second then you're ending
> > up with 12.5 frames a second.
> >
> > PAL is 50hz, it's based on the hertz of the a/c coming into your house
> > which in Ireland is 50hz.
> >
> > AFAIK some parts of America have PAL at 60hz.
>>Isnt that NTSC?
There's two types of PAL standards one uses a vertical resolution of 50hz
the other uses 60hz,
NTSC also uses 60hz.
A search in google should explain it.
Jerry.
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