Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sat, 14 Dec 2002 18:06:52 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sat, 14 Dec 2002 18:06:52 -0500 Received: from chaos.physics.uiowa.edu ([128.255.34.189]:18565 "EHLO chaos.physics.uiowa.edu") by vger.kernel.org with ESMTP id ; Sat, 14 Dec 2002 18:06:51 -0500 Date: Sat, 14 Dec 2002 17:14:43 -0600 (CST) From: Kai Germaschewski X-X-Sender: kai@chaos.physics.uiowa.edu To: Wolfgang Fritz cc: linux-kernel@vger.kernel.org Subject: Re: i4l dtmf errors In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1024 Lines: 24 On Sat, 14 Dec 2002, Wolfgang Fritz wrote: > > it seems isdn4linux detects DTMF tones from normal speach. This is > > rather annoying when using i4l for voice with Asterisk.org. This is > > tested on all recent kernels > > The DTMF detection is broken since kernel 2.0.x. I have a patch for a > 2.2 kernel which may manually be applied 2.4 kernels with some manual > work. It fixes an overflow problem in the goertzel algorithm (which > does the basic tone detection) and changes the algorithm to detect the > DTMF pairs. If interested, I can try to recover that patch. If you dig out that patch and submit it (to me), I'm pretty sure there's a good chance of it going into the official kernel. ISTR there was talk about that earlier, but nothing ever happened. --Kai - 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/