Voice over GPRS?

ROB rob at borfo.com
Fri Feb 2 17:37:59 CET 2007

Bit rate=sampling rate x bit depth

1kb/s isn't going to get you too much audio.  Try encoding an mp3 at
1kb/s to see how audible that would be.  I think you'd be looking at
something more along the lines of 32-64kb/s to get anything that you
could understand.  It might be easier to make a phone call.
Conveniently enough, I think the device will have that capacity as

On 2/2/07, Robert Michel <openmoko at robertmichel.de> wrote:
> Salve!
> Does anybody has experiances/ideas about Voice over GPRS?
> How long is the delay? It could maybe used for asyncron
> voice communication Talk2Talk (instead of pushing a button)
> In Germany did three Prepaid Provider published new Tariffs
> with 0.24Euro/MB.
> German pages:
> http://teltarif.de/arch/2007/kw05/s24754.html
> data cost calculator:
> http://teltarif.de/mobilfunk/datenrechner.html
> I think with this tariffs using mobil data becomes
> interesting ;)
> By using 1KB/s for audio and some overhead, let
> us say 2 KB/s 0.24Euro/MB = 24 Cent for 500 seconds,
> 60 seconds makes then about 3 cents. When both using
> this 6 cents. Hmm that would be interesting when
> the user makes often make brakes/pause in their talk.
> Greetins,
> rob
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