On Thu, Apr 1, 2010 at 11:11 AM, Matteo Sisti Sette <[email protected]> wrote: > Matteo Sisti Sette escribió:
> Oh no, maybe not. > I read your explanation more carefully and of course, the non-perfectness of > the interpolation process (i.e. its non-zero frequency response in the stop > band) is responsible for the persistence of attenuated copies of the > original spectrum at multiples of the original sampling rate, which then > appear aliased into the passband when the signal is sampled again at a > different rate. > > > This is what's going on when discontinuities in the interpolated signal > cause noise at high frequencies, isn't it? Yes, that's my interpretation and explanation of it. It works out nice and linear in the spectral domain *if* we can make that intermediate step with the Dirac-delta comb which copies the spectrum. Then, *all* the deviations in the reconstructed signal come from the places where the spectrum does not match the ideal response. _______________________________________________ [email protected] mailing list UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list
