Re: i4l dtmf errors

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> 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
Computers are like air conditioners.
They stop working when you open Windows.
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• Next message: Nix: "2.4.20, sparc64 --- ide and binfmt-elf cannot be built as modules"
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