Re: 180-deg phase-shift -- A study in Usenet tech

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1 total messages Started by SRGPMAP Thu, 13 Jun 1991 16:08

#2044

Author: SRGPMAP
Date: Thu, 13 Jun 1991 16:08

6 lines
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Here is another theoretical breakthrough. It has been stated that a perfect
reconstruction filter for sampled audio has an infinite impulse response,
due to the infinitely sharp cut-off required at the Nyquist frequency. However,
a finite duration reconstruction filter with an impulse response which is a
half sine pulse (at a frequency of fs/2) gives exact reconstruction at the
Nyquist frequency.

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