Newsgroups: comp.speech
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From: richardf@dialog.ee.su.oz.au (Richard Favero)
Subject: Re: FFT and reverse FFT question
Message-ID: <1993Feb24.012931.5707@ucc.su.OZ.AU>
Keywords: phase spectrum
Sender: richardf@dialog (Richard Favero)
Nntp-Posting-Host: dialog.ee.su.oz.au
Organization: University of Sydney, EE Dept.
References:  <798@atr-hr.atr.co.jp>
Date: Wed, 24 Feb 1993 01:29:31 GMT
Lines: 15

Hi,

I remember there being a symetry between the real and  the imaginary parts of an
FFT of a real signal.

If I am correct the real part is an even function such that F(w) = F(-w) and  the
imaginary is odd so that F(w) = -F(-w).

I hope it helps. I hope I am correct.

-- 
Richard Favero
Speech Technology Research Group		Ph:  61-2-692 4509
Dept. of Electrical Engineering			Fax: 61-2-692 3847
University of Sydney, NSW, 2006, Australia	email: richardf@ee.su.oz.au
