>You cannot calculate 1/x when x=0, can you? Since that's division by zero. >Yet you'll know when x tends to zero from right towards left, then 1/x >will tend to +infinity.
Not sure what that is supposed to have to do with the present subject. If you want to put it in terms of simple arithmetic, the aliasing issue works like this: I add two numbers together, and find that the answer is X. I tell you X, and then ask you to determine what the two numbers were. Can you do it? E On Tue, Aug 18, 2015 at 2:13 PM, Peter S <peter.schoffhau...@gmail.com> wrote: > On 18/08/2015, Ethan Duni <ethan.d...@gmail.com> wrote: > >>In order to reconstruct that sinusoid, you'll need a filter with > >>an infinitely steep transition band. > > > > No, even an ideal reconstruction filter won't do it. You've got your > > +Nyquist component sitting right on top of your -Nyquist component. Hence > > the aliasing. The information has been lost in the sampling, there's no > way > > to reconstruct without some additional side information. > > You cannot calculate 1/x when x=0, can you? Since that's division by zero. > Yet you'll know when x tends to zero from right towards left, then 1/x > will tend to +infinity. > _______________________________________________ > music-dsp mailing list > music-dsp@music.columbia.edu > https://lists.columbia.edu/mailman/listinfo/music-dsp >
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