[Freeswitch-users] mod_g729

Michael Collins msc at freeswitch.org
Fri Jan 23 12:29:04 PST 2009

On Fri, Jan 23, 2009 at 12:16 PM, Rodrigo P. Telles
<telles-listas at devel-it.com.br> wrote:
> Hi Dave,
> Down here in Brazil, the bandwidth costs is very high (around U$ 400.00/Mb) so it should be valid only for a "non" third
> world country.
> G729 and G723.1 is almost a law here, if you don't play at least with G729 your ITSP is out of mark share!
> My 2 cents from a third world country.

What is the patent and licensing situation in Brazil? Those are also
factors. $10/port might be cheap in the US but in Brazil it could be
much more? (I'm asking...)

> Regards,
> Rodrigo Telles
> Em 23-01-2009 03:09, David Knell escreveu:
>> Steve Underwood wrote:
>>> Depends what you are after. Speex offers the quality of G.729 at around
>>> the same processing load. However, nobody seems to want to pay for the
>>> processing load of G.729. Almost everything uses G.729A. Half the
>>> processing load, but significantly poorer quality.
>>> VoIP is mostly a race to the bottom, and people wonder why it makes no
>>> money for provides. :-\
>> And, at the wholesale level, it makes no sense whatsoever to compress calls
>> any more: bandwidth is so cheap (and has been for a while) that the loss in
>> call quality - especially from tandem compressions - and the increased
>> processing requirements and other bits of expense do not stack up.  Case in
>> point: we moved a route from G.711 to G.729, and saw the ACD drop from
>> over 10 to under 7 minutes.  It was a route to mobiles, so the audio was
>> being
>> recompressed with the GSM codec on its way to the handsets.  Economically,
>> had we carried on using G.729, we'd have lost about 30% of our margin on
>> that route.
>> --Dave
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