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Article #2044Re: 180-deg phase-shift -- A study in Usenet tech
From: SRGPMAP
Date: Thu, 13 Jun 1991 16:08
Date: Thu, 13 Jun 1991 16:08
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775 bytes
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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arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!spool.mu.edu!uunet!comp.vuw.ac.nz!wnv!grace!srgpmapShow Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!spool.mu.edu!uunet!comp.vuw.ac.nz!wnv!grace!srgpmap From: SRGPMAP@grace.dsir.govt.nz Newsgroups: comp.dsp Subject: Re: 180-deg phase-shift -- A study in Usenet tech Message-ID: <11945@grace.dsir.govt.nz> Date: 13 Jun 91 16:08:37 GMT Organization: DSIR, Gracefield, New Zealand Lines: 6