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<DIV><SPAN class=857390000-06012010><FONT face=宋体 color=#0000ff size=2>Hi
Debasish,</FONT></SPAN></DIV>
<DIV><SPAN class=857390000-06012010><FONT face=宋体 color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=857390000-06012010><FONT face=宋体 color=#0000ff size=2>I think
it is a better way to refer speech recognition materials.</FONT></SPAN></DIV>
<DIV><SPAN class=857390000-06012010><FONT face=宋体 color=#0000ff size=2>The
preprocess part of them will always introduce the words
detection.</FONT></SPAN></DIV>
<DIV><SPAN class=857390000-06012010><FONT face=宋体 color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=857390000-06012010><FONT face=宋体 color=#0000ff size=2>One way I
used is to compute the zero-crossing rate.</FONT></SPAN></DIV>
<DIV><SPAN class=857390000-06012010><FONT face=宋体 color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=857390000-06012010><FONT face=宋体 color=#0000ff size=2>Here is
the wiki page you may find useful:</FONT></SPAN></DIV>
<DIV><SPAN class=857390000-06012010><FONT face=宋体 color=#0000ff size=2><A
href="http://en.wikipedia.org/wiki/Zero-crossing_rate">http://en.wikipedia.org/wiki/Zero-crossing_rate</A></FONT></SPAN></DIV>
<DIV><SPAN class=857390000-06012010><FONT face=宋体 color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=857390000-06012010><FONT face=宋体 color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><FONT face=宋体><FONT color=#0000ff><FONT size=2>G<SPAN
class=857390000-06012010>ood luck!</SPAN></FONT></FONT></FONT></DIV>
<DIV><FONT face=宋体><FONT color=#0000ff><FONT size=2><SPAN
class=857390000-06012010></SPAN></FONT></FONT></FONT> </DIV>
<DIV><FONT face=宋体><FONT color=#0000ff><FONT size=2><SPAN
class=857390000-06012010></SPAN></FONT></FONT></FONT> </DIV>
<DIV><FONT face=宋体><FONT color=#0000ff><FONT size=2><SPAN
class=857390000-06012010></SPAN><SPAN
class=857390000-06012010>Martin</SPAN></FONT></FONT></FONT></DIV><BR>
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<FONT face=Tahoma size=2><B>From:</B> speex-dev-bounces@xiph.org
[mailto:speex-dev-bounces@xiph.org] <B>On Behalf Of </B>ext Debasish
Chandra<BR><B>Sent:</B> Wednesday, January 06, 2010 12:23 AM<BR><B>To:</B>
speex-dev@xiph.org<BR><B>Subject:</B> [Speex-dev] Speech
Detection<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal>Hi,<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>I want to detect speech locations from raw WAV file. For
example a 10 sec WAV file contains silence/noise for 1<SUP>st</SUP> sec, speech
for next 4 seconds, then silence/noise for next 2 seconds and speech for next 3
seconds. <o:p></o:p></P>
<P class=MsoNormal>I want to generate an information that this WAV file has
speech from 1-5 seconds and from 8-10 seconds. <o:p></o:p></P>
<P class=MsoNormal>How I can do that by using preprocessor utility of
libspeexdsp?<o:p></o:p></P>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>With Best Regards,<o:p></o:p></P>
<P class=MsoNormal>Debasish<o:p></o:p></P>
<P class=MsoNormal> <o:p></o:p></P></DIV></BODY></HTML>