Re: DTMF v4 from Martin Thomson on 2012-12-18 (public-webrtc@w3.org from December 2012)

From: Martin Thomson <martin.thomson@gmail.com>
Date: Mon, 17 Dec 2012 16:56:22 -0800
To: Roman Shpount <roman@telurix.com>
Cc: Harald Alvestrand <harald@alvestrand.no>, "public-webrtc@w3.org" <public-webrtc@w3.org>
Message-ID: <CABkgnnWuMt3OpuptvxkeZbfMgKG1+8p342qsijxiQ_d6NgRSPw@mail.gmail.com>

On 17 December 2012 16:35, Roman Shpount <roman@telurix.com> wrote:
> I was actually thinking about an ability to implement a DTMF tone generator
> similar to a normal dial pad where tone is played while the button is
> pressed. In this case I would be able to start a tone with some extremely
> long duration, let's say 60 seconds, and cancel the tone playback when the
> button is released.

To do this properly, you really need to have indefinite length tones
with distinct start and end events.  We decided not to do that.  The
only reasonable implementation of what you suggest is to send a short
tone on each keypress, with no real effect when the key is held down.

Received on Tuesday, 18 December 2012 00:56:54 UTC