Messages in this thread | ![/](/images/icornerl.gif) | | Date | Wed, 8 Jan 2003 15:04:40 +0200 | From | Matti Aarnio <> | Subject | Re: [Asterisk] DTMF noise |
| |
On Wed, Jan 08, 2003 at 06:43:10AM -0600, David D. Hagood wrote: > Thomas Tonino wrote: > >Roy Sigurd Karlsbakk wrote: > >>so - we DO NOT need a 'simplistic' DTMF decoder. > > > >You need a good one. But good can be simplistic, is what I'm saying. > > > >DTMF was designed to be easy to decode reliably. Complex doesn't > >automatically mean better. > > I haven't looked at the code, but I'd recommend using a bank of Goertzel > filters -
Do look into drivers/isdn/isdn_audio.c That does use Görtzel filter, but does not do complete energy comparisons -> false detections.
/Matti Aarnio - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| ![\](/images/icornerr.gif) |