lkml.org 
[lkml]   [2003]   [Jan]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [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/

\
 
 \ /
  Last update: 2005-03-22 13:32    [W:0.048 / U:0.516 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site