Käynnissä

Audio processing using goertzel algorithm

Hi,

I'm building a voip application. Most of it works, but I'm missing facilities for detection of tones e.g dtmf or voicemail beeps. Normally a dsp should do the job, but the telephony system used has no dsp's onboard. The Goertzel algorithm can be used to implement the logic needed.

The application has to be a dll which takes an audio buffer (alaw 8khz mono, without header (raw)), this buffer is populated by some third party software. Other arguments are : frequency(s) to detect and a time indicator (how long on a tone has to occur e.g. 100ms). When the specified tones have been detected a callback has to be done indicating which tones have been found.

The application should be robust and fast. It should be able to handle 750 concurrent calls if needed on a 3ghz dual core system with 2gb of ram. For now it will handle 4 lines, as a proof of concept.

Any suggestions appreciated.

Delivery of both a dll and the source code preferably in a ms visual studio project.

With best regards

Rico

Taidot: C-ohjelmointi

Näytä lisää: goertzel algorithm code, goertzel algorithm, goertzel visual studio dll, goertzel, goertzel algorithm source code, code goertzel algorithm, goertzel algorithm code dtmf, goertzel dtmf source, code goertzel algorithm dtmf, goertzel algorithm without buffer, goertzel algorithm audio, dtmf source code, algorithm goertzel source code, algorithm goertzel, visual studio job, ms processing, logic algorithm, algorithm works, core logic, application algorithm, algorithm header, goertzel algorithm source, source goertzel algorithm, goertzel algorithm dll, goertzel code

About the Employer:
( 1 review ) woudenberg, Netherlands

Projektin tunnus: #520536

Myönnetty käyttäjälle:

cppart

Please check PMB.

180 $ USD 7 päivässä
(4 arvostelua)
3.3

5 freelanceria on tarjonnut keskimäärin 728 $ tähän työhön

firewind

Hi, Please take a look at PMB. Best regards

199 $ USD 7 päivässä
(1 arvostelu)
3.0
anipunge

experienced professionals

190 $ USD 45 päivässä
(0 arvostelua)
0.0
yuli100

did goertzel in the past in very noisy environment, know how to make it robust.

3000 $ USD 6 päivässä
(0 arvostelua)
0.0
nooc

A DLL with Alaw/Goerzel? I'm ready.

70 $ USD 3 päivässä
(0 arvostelua)
0.0