[Freeswitch-users] mod_g729

[Steve Underwood]

Kristian Kielhofner wrote:
> On Thu, Jan 22, 2009 at 7:30 PM, Steve Underwood <steveu at coppice.org> 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.
>>     
>
>   Throughout most of this thread I've been using G.729 and G.729a
> interchangeably.  That's sloppy on my part.  Most of the time I meant
> G.729a because that is what most people (everyone?) uses.
>
>   I was under the impression the quality difference wasn't that
> significant.  I can't say if I've ever knowingly used "true" G.729.
> It certainly doesn't help that G.729a is allegedly completely
> compatible with G.729, to the point where I don't think it's even
> valid to use "G.729a" or annexa in an SDP...
>   
There is no reason whatsoever to differentiate between G.729 and G.729A 
in the SDP as the bit streams are 100% compatible. Annex A data is just 
encoded and decoded in less optimal ways.

Regards,
Steve