exactly
Oeyvind


2007/12/13, Peiman Khosravi <peimankhosravi@gmail.com>:
>
> so would the best way to do this be to filter a sample before you
> transpose it up?
>
> Peiman
>
> On 13 Dec 2007, at 12:38, Mark Van Peteghem wrote:
>
> > Oeyvind Brandtsegg schreef:
> >> I don't think a "one stop anti aliasing for any signal" method is
> >> technically possible,
> >> because aliasing is closely related to the sampling frequency,
> >> and once you have a signal that contains partials higher than the
> >> nyquist frequency,
> >> you get aliasing, and there's no way I know to remove it once it's
> >> there (because the harmonics have been folded down into the
> >> frequency range that the sampling rate is able to represent).
> >
> > I see, you can't distinguish between folded frequencies and
> > frequencies that are supposed to be there, so you can't do anything
> > about it.
> >
> > --
> >  Mark
> >  _________________________________________
> >  When you get lemons, you make lemonade.
> >  When you get hardware, you make software.
> >
> >
> >
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