Newsgroups: comp.speech
Path: pavo.csi.cam.ac.uk!pipex!uunet!walter!thumper.bellcore.com!dpepper
From: dpepper@thumper.bellcore.com (David J. Pepper)
Subject: Wanted:  LPC to Melcepstral Conversion Routine
Message-ID: <1992Oct7.141959.1268@walter.bellcore.com>
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Reply-To: dpepper@thumper.bellcore.com (David J. Pepper)
Organization: Bellcore MRE
Date: Wed, 7 Oct 92 14:19:59 GMT
Lines: 19

Does anyone have a reference to the bilinear transform algorithm that
goes directly from LPC parameters to Mel scale cepstral parameters?
I have seen many people who say that they are using this algorithm,
but I have never been able to track down the actual conversion routine.

BTW, for those that are interested in LPC analysis and conversions,
the book J.D. Markel and A.H. Gray, Jr., "Linear Prediction of Speech,"
Springer--Verlag, 1976 is very good.  It contains a variety of transformation
routines and FORTRAN code for those transformations.  Also, a good paper
on Mel-cepstral parameters (from an FFT type spectrum) is S.B. Davis and
P. Mermelstein, "Comparison of Parametric Representations for Monosyllabic
Word Recognition in Continuously Spoken Sentences," IEEE Trans. ASSP,
vol. 28, pp. 357--366, August 1980.

			Thanks in advance,
			David Pepper



