Sophie: festival-speechtools-devel-1.2.96-18.fc14 i686

festival-speechtools-devel-1.2.96-18.fc14.i686.rpm

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<TD VALIGN=TOP><H2> <A HREF="#DOC.DOCU">Filter Design</A></H2></TD></H2></TD></TR></TABLE>

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<IMG ALT="o" BORDER=0 SRC=icon1.gif><A NAME="design_FIR_filter"></A>
<A HREF=design_FIR_filter.html><B>design_FIR_filter</B></A></TD><TD><BR>
<I>Create an artibtrary filter or order <TT>order</TT> that attempts to give the frequecny response given by <TT>freq_response</TT>.</I>
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<IMG ALT="o" BORDER=0 SRC=icon1.gif><A NAME="design_lowpass_FIR_filter"></A>
<A HREF=design_lowpass_FIR_filter.html><B>design_lowpass_FIR_filter</B></A></TD><TD><BR>
<I>Design a FIR lowpass filter of order <TT>order</TT> and cut-off freqeuncy <TT>freq</TT>.</I>
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<IMG ALT="o" BORDER=0 SRC=icon1.gif><A NAME="design_highpass_FIR_filter"></A>
<A HREF=design_highpass_FIR_filter.html><B>design_highpass_FIR_filter</B></A></TD><TD><BR>
<I>Design a FIR highpass filter of order <TT>order</TT> and cut-off freqeuncy <TT>freq</TT>.</I>
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<A NAME="DOC.DOCU"></A>
<BLOCKQUOTE>
FIR Filtering is a 2 stage process, first involving design and then
the filtering itself. As the design is somewhat costly, it is usually
desirable to design a filter outside the main loop.

<P>For one off filtering operations, functions are
provided which design and filter the waveform in a single go.  

<P>It is impossible to design an ideal filter, i.e. one which exactly
obeys the desired frequency response. The "quality" of a filter is
given by the order parameter, with high values indicating good
approximations to desired responses. High orders are slower. The
default is 199 which gives a pretty good filter, but a value as low as
19 is still usable if speech is important.
</BLOCKQUOTE>
<DL><DT><DD></DL><P><P><I><A HREF="index.html">Alphabetic index</A></I> <I><A HREF="HIER.html">Hierarchy of classes</A></I></P><HR>
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<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>
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