[pjsip] Tone detection

Olle Frimanson olle.frimanson at keystream.se
Mon Aug 10 16:16:06 EDT 2009

Hi I don’t think there is any tone detection algorithms in PJSUA,


If you want to detect a single tone I would recommend Görtzels algoritm, you
can start with http://en.wikipedia.org/wiki/Goertzel_algorithm





From: pjsip-bounces at lists.pjsip.org [mailto:pjsip-bounces at lists.pjsip.org]
On Behalf Of Jose Suarez
Sent: den 10 augusti 2009 18:19
To: pjsip list
Subject: [pjsip] Tone detection


Hi All,

I'd like to know how to detect a tone using PJSUA. I'm developing a dialer
and when it makes a call and play a message I want to detect during the
playing of the message a voice mail tone, that tone has the following

Frequency: 875

Desviation: 5

It's a Single Tone.


Do you know how Can I do to create this tone and to detect it?


Thanks in advance,


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