Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 10 Jan 2003 06:55:20 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 10 Jan 2003 06:55:20 -0500 Received: from 213-187-164-3.dd.nextgentel.com ([213.187.164.3]:48588 "EHLO mail.pronto.tv") by vger.kernel.org with ESMTP id convert rfc822-to-8bit; Fri, 10 Jan 2003 06:55:20 -0500 Content-Type: text/plain; charset=US-ASCII From: Roy Sigurd Karlsbakk Organization: ProntoTV AS To: Wolfgang Fritz , linux-kernel@vger.kernel.org Subject: Re: [Asterisk] DTMF noise Date: Fri, 10 Jan 2003 13:03:50 +0100 User-Agent: KMail/1.4.1 References: <3E1D705E.1030203@sktc.net> <3E1D79CB.5010503@gmx.net> In-Reply-To: <3E1D79CB.5010503@gmx.net> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Message-Id: <200301101303.50046.roy@karlsbakk.net> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 994 Lines: 24 > My simple patch added a relative energy comparision of the DTMF tones > and a simple plausibiltity check (DTMF is only accepted if there is > exactly one DTNF pair and no/low signal level on the other DTMF > frequencies. That worked with my (very limited) tests. I'm not sure if we're at the source of the problem. I mean - it should be possible to set a minimum length as well, so just touching a key won't be accepted. I beleive this'll remove most of the falsly detected dtmf signals as well, as noone really holds the same tone for a long time while speaking 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. - 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/