Subject: Re: frequency to mel formula From: Guillaume Lemaitre <Guillaume.Lemaitre@xxxxxxxx> Date: Fri, 17 Jul 2009 14:56:23 +0200 List-Archive:<http://lists.mcgill.ca/scripts/wa.exe?LIST=AUDITORY>This is a multi-part message in MIME format. --------------020304060601060400050204 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by torrent.cc.mcgill.ca id n6HCuRvY004064 Dear list Another lead: Malcom Slaney implemented mfcc calculations in the Matlab=20 Auditory Toolbox using a method that is different from the formulae=20 previously cited on the list. Once I compared his method to the formula=20 2595*log10(1+hz/700) and found little difference. Malcom may remember=20 where he devised the method from (I would bet from Rabiner's book?). By the way, I found the log10(1+hz/700) formula in the following=20 conference paper: @xxxxxxxx{mol01, author =3D "Sirko Molau and Michael Pitz and Ralf Schl=FCter and Hermann= Ney", title =3D "Computing Mel-Frequency Cepstral Coefficients on the Power=20 Spectrum", booktitle =3D {International Conference on Acoustic, Speech and Signal= =20 Processing}, year =3D {2001}, address =3D {Salt Lake City, UT}, month =3D {June}, } I don't currently have the paper at hand, but if someone could check,=20 they may cite their source. Hope that it helps. Best regards Guillaume --=20 -------------------------------------------------------------------------= --- Guillaume Lemaitre, PhD / / Equipe Perception et Design Sonores / Sound Perception and Design Team STMS-IRCAM-CNRS UMR 9912 1, place Igor Stravinsky F-75004 Paris - FRANCE tel : (+33 1) 44.78.48.38 fax : (+33 1) 44.78.15.40 e-mail : lemaitre@xxxxxxxx --------------------------------------=20 -------------------------------------- --------------020304060601060400050204 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type"> <title></title> </head> <body bgcolor="#ffffff" text="#000000"> Dear list<br> Another lead: Malcom Slaney implemented mfcc calculations in the Matlab Auditory Toolbox using a method that is different from the formulae previously cited on the list. Once I compared his method to the formula 2595*log10(1+hz/700) and found little difference. Malcom may remember where he devised the method from (I would bet from Rabiner's book?). <br> <br> By the way, I found the log10(1+hz/700) formula in the following conference paper:<br> @xxxxxxxx{mol01,<br> author = "Sirko Molau and Michael Pitz and Ralf Schlüter and Hermann Ney",<br> title = "Computing Mel-Frequency Cepstral Coefficients on the Power Spectrum",<br> booktitle = {International Conference on Acoustic, Speech and Signal Processing},<br> year = {2001},<br> address = {Salt Lake City, UT},<br> month = {June},<br> }<br> I don't currently have the paper at hand, but if someone could check, they may cite their source.<br> Hope that it helps.<br> Best regards<br> Guillaume<br> <br> <br> <div class="moz-signature">-- <br> <meta http-equiv="Content-Type" content="text/html; "> <meta http-equiv="Content-Style-Type" content="text/css"> <title></title> <meta name="Generator" content="Cocoa HTML Writer"> <meta name="CocoaVersion" content="824.42"> <style type="text/css"> p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica} </style> <p class="p1">----------------------------------------------------------------------------<br> </p> Guillaume Lemaitre, PhD<br> <p class="p1"><i><br> </i></p> <p class="p1">Equipe Perception et Design Sonores /</p> <p class="p1">Sound Perception and Design Team<br> </p> <p class="p1"><br> </p> <p class="p1">STMS-IRCAM-CNRS UMR 9912<br> </p> <p class="p1">1, place Igor Stravinsky F-75004 Paris - FRANCE</p> <p class="p1">tel<span class="Apple-converted-space"> </span>: (+33 1) 44.78.48.38</p> <p class="p1">fax : (+33 1) 44.78.15.40</p> <p class="p1">e-mail<span class="Apple-converted-space"> </span>: <a class="moz-txt-link-abbreviated" href="mailto:lemaitre@xxxxxxxx">lemaitre@xxxxxxxx</a></p> <p class="p1">--------------------------------------<span class="Apple-converted-space"> </span>--------------------------------------</p> </div> </body> </html> --------------020304060601060400050204--