Hi Brad- Yes, there's lots of voice detection software that exists - but not much free software. Last year, I had to pay an audio software engineer to develop similar code for a project that I was working on. Detecting voice (or any kind of audio) is a matter of measuring the audio energy in the particular bandwidth you're interested in over a short time period.
There is even software that can differentiate between a human speaking, and a answering machine message which is longer and has a different "cadence" than a human saying "hello" or answering with their name etc Scott M. Stingel Emerging Voice Technology Inc. Email: [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> URL: www.evtmedia.com <http://www.evtmedia.com> > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of > Steve Underwood > Sent: Friday, October 03, 2003 3:04 PM > To: [EMAIL PROTECTED] > Subject: Re: [Asterisk-Users] Voice detection > > > Hi Brad, > > If you want to detect that a sound is voice, rather than > something else, > it isn't easy. There is information around on the Internet about > methods, but I have never tried them and don't know how well > they work. > Unless you have some understanding of DSP I wouldn't bother > trying. On > the other hand, if you do have some DSP expertise it might be a fun > thing to try. > > Regards, > Steve > > Brad Waite wrote: > > > Does anyone know if there's public voice detection algorithms > > available? I've scoured the net for the last hour or so, > and I can't > > come up with anything except a few proprietary or embedded > solutions. > > > > I know dsp.c uses goertzel algorithms for DTMF detection, > but how does > > one detect voice? > > > > I dunno, maybe detecting voice isn't the way to go. I want > to begin > > playback of a file after a phone/answering machine has answered. > > > > _______________________________________________ > Asterisk-Users mailing list > [EMAIL PROTECTED] > http://lists.digium.com/mailman/listinfo/asterisk-users > > _______________________________________________ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users
