<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<TITLE>void fbank2melcep</TITLE>
<META NAME="GENERATOR" CONTENT="DOC++ 3.4.6">
</HEAD>
<body bgcolor="#ffffff" link="#0000ff"
vlink="#dd0000" text="#000088" alink="9000ff">
<A HREF = "http://www.cstr.ed.ac.uk/">
<IMG align=left BORDER=0 SRC = "cstr.gif"></A>
<A HREF="http://www.cstr.ed.ac.uk/projects/speech_tools.html">
<IMG BORDER=0 ALIGN=right SRC="est.jpg" width=150 height=93></A>
<br>
<br clear=left>
<p align=right>
In file ../include/sigpr/EST_sigpr_frame.h:<TABLE BORDER=0><TR>
<TD VALIGN=TOP><H2>void <A HREF="#DOC.DOCU">fbank2melcep</A></H2></TD><TD><H2>(const <!1><A HREF="EST_FVector.html">EST_FVector</A> &fbank_vec,<BR> <!1><A HREF="EST_FVector.html">EST_FVector</A> &mfcc,<BR> const float liftering_parameter,<BR> const bool include_c0 = false)</H2></TD></TR></TABLE>
<BLOCKQUOTE>Compute the dicrete cosine transform of log Mel-scale filter bank output to get the Mel cepstral coeffecients for a frame of speech.</BLOCKQUOTE>
<A NAME="DOC.DOCU"></A>
<HR>
<H2>Documentation</H2>
<BLOCKQUOTE>Compute the dicrete cosine transform of log Mel-scale filter bank output
to get the Mel cepstral coeffecients for a frame of speech.
Optional liftering (filtering in the cepstral domain) can be applied to
normalise the magnitudes of the coefficients. This is useful because,
typically, the higher order cepstral coefficients are significantly
smaller than the lower ones and it is often desirable to normalise
the means and variances across coefficients.
<P>The lifter (cepstral filter) used is:
<BR><CENTER><IMG BORDER=0 SRC=g000033.gif><BR></CENTER>
<P>A typical value of L used in speech recognition is 22. A value of L=0 is taken
to mean no liftering. This is equivalent to L=1.
<P></BLOCKQUOTE>
<DL><DT><DT><B>See Also:</B><DD><!1><A HREF="sig2fft.html">sig2fft</A>
<BR><!1><A HREF="fft2fbank.html">fft2fbank</A>
<BR><!1><A HREF="sig2fbank.html">sig2fbank</A><BR><DD></DL><P><P><I><A HREF="index.html">Alphabetic index</A></I> <I><A HREF="HIER.html">HTML hierarchy of classes</A> or <A HREF="HIERjava.html">Java</A></I></P><HR>
<A HREF = "http://www.ed.ac.uk/">
<IMG align=right BORDER=0 SRC = "edcrest.gif"></A>
<P Align=left><I>This page is part of the
<A HREF="http://www.cstr.ed.ac.uk/projects/speech_tools.html">
Edinburgh Speech Tools Library</A> documentation
<br>
Copyright <A HREF="http://www.ed.ac.uk"> University of Edinburgh</A> 1997
<br>
Contact: <A HREF="mailto:speech_toolss@cstr.ed.ac.uk">
speech_tools@cstr.ed.ac.uk </a>
</P>
<br clear=right>
distrib
>
Fedora
>
14
>
x86_64
>
media
>
updates
>
by-pkgid
>
0e54ba0ee564ce6063a5e83aa86060c5
>
files
>
487
