Newsgroups: comp.speech
Path: lyra.csx.cam.ac.uk!doc.ic.ac.uk!daresbury!keele!uknet!cf-cm!cybaswan!eerichar
From: eerichar@uk.ac.swan.pyr (h b richards)
Subject: Re: Q : LPC - Spectrum
Message-ID: <1994Apr26.151509.24390@uk.ac.swan.pyr>
Organization: Speech Research Group, University College Swansea
References: <2p3fpb$bd@dr-pepper.East.Sun.COM> <1994Apr21.184043.3229@uk.ac.swan.pyr> <Cov32s.G02@aisb.ed.ac.uk>
Date: Tue, 26 Apr 1994 15:15:09 GMT
Lines: 14

In article <Cov32s.G02@aisb.ed.ac.uk> simonk@cstr.ed.ac.uk (Simon King) writes:
>
>|> I think the most efficient way of evaluating the spectrum of an LPC
>|> filter is to first calculate the spectrum of the *whitening* filter.
>
>Why the name "whitening" filter ?  ^-- this is the _inverse_ filter.
>

Sorry for using a term you are not familiar with. The "inverse" filter
is sometimes called the "whitening" filter as it removes the spectral
colouration of the speech signal increasing its spectral flatness.

H.B.Richards

