[Speex-dev] Speech Detection

Zhao, Dun (NSN - CN/Shanghai) dun.zhao at nsn.com
Tue Jan 5 16:10:19 PST 2010

Hi Debasish,
I think it is a better way to refer speech recognition materials.
The preprocess part of them will always introduce the words detection.
One way I used is to compute the zero-crossing rate.
Here is the wiki page you may find useful:
Good luck!


From: speex-dev-bounces at xiph.org [mailto:speex-dev-bounces at xiph.org] On
Behalf Of ext Debasish Chandra
Sent: Wednesday, January 06, 2010 12:23 AM
To: speex-dev at xiph.org
Subject: [Speex-dev] Speech Detection



I want to detect speech locations from raw WAV file. For example a 10
sec WAV file contains silence/noise for 1st sec, speech for next 4
seconds, then silence/noise for next 2 seconds and speech for next 3

I want to generate an information that this WAV file has speech from 1-5
seconds and from 8-10 seconds.  

How I can do that by using preprocessor utility of libspeexdsp?


With Best Regards,



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