Re: i4l dtmf errors

[Roy Sigurd Karlsbakk <roy@karlsbakk.net>]

>   Quick reading of  drivers/isdn/isdn_audio.c(*)  shows that it does use
>   fixed-point Görtzel (Goertzel in english) algorithm for detecting
>   tones, but it does _not_ do comparison of received overall signal
>   power vs. detected DTMF tone powers.
>
>   When there is signal power outside the DTMF channels, signal should
>   not be detected.  Also, DTMF tone powers should be roughly equal,
>   and exactly two tones should be present for valid detection.
>
>       http://www.numerix-dsp.com/goertzel.html
>
>   Adding those power tests should be fairly trivial, but I leave it
>   to Somebody Else...

Is there a 'somebody else' (perhaps the isdn maintainer?) that have time to 
look at this?

thanks

roy
-- 
Roy Sigurd Karlsbakk, Datavaktmester
ProntoTV AS - http://www.pronto.tv/
Tel: +47 9801 3356

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