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Date: Sun, 21 Jul 2002 14:01:23 -0500 (CDT)
From: Mark Spencer <markster@linux-support.net>
To: Daniel Phillips <phillips@arcor.de>
cc: <linux-kernel@vger.kernel.org>
Subject: Re: Zaptel Pseudo TDM Bus
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> A random question: is there any reason why Ogg isn't among the codecs?

It wasn't ready when I started.  Ogg, like mp3, is generally a very poor
choice of codec for telephony, and even for the storage of files, unless
its performance has improved greatly.

On a 900 Mhz Athlon, you can get *hundreds* of simultaneous full-duplex
GSM full-rate codecs running.  Certainly that's an unrealistic expectation
even for half-duplex ogg or mp3.  As for using ogg as an actual telephony
protocol, its frame size is (or at least was at the time I contacted the
author) much too long to be practical.  Frame sizes for VoIP should be
around 160 to 240 samples in general.

Mark

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