i think this pdf can add lot's of useful information to this thread :
http://www.student.oulu.fi/~oniemita/dsp/deip.pdf
cyrille
Matteo Sisti Sette a écrit :
Roman Haefeli escribió:
On Tue, 2010-03-30 at 14:15 +0200, Matteo Sisti Sette wrote:
However, even in presence of a tradeoff that makes some sense (i.e.
each of the two choices has advantages and disadvantages), it seems
to me that for audio applications the generated high-frequency noise
due to discontinuities should be _hugely_ worse than the
passband-non-flatness.
Judging from the graph, it seems that the differences in the
passband-non-flatness are much smaller than the differences in the stop
band. But then again, maybe I am tricked by the logarithmic view.
Hmm, I don't think they can be compared at the same scale - though I
don't know with what scaling factor thay can be compared - or if it
makes sense at all to compare them quantitatively.
However, when one has to evaluate the ripple of the flat part, one
usually zooms in quite a bit...
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