[asterisk-users] wideband codec support

[Madhuri Patwardhan]

Thanks for the prompt reply.

I had a look at asterisk source file
codec/codec_speex.c and it *seems* like 8 khz is hard
coded in it.

I am interested in wideband codec and as I understand
speex (16 khz and 32 khz) are the only open source
wide band codecs. 

Thanks for the wiki link, I will certainly try it. Is
16 khz Speex possible with Asterisk? Has anybody tried
it?

Thanks,

Madhuri




--- Steve Totaro <stevetotaro at hotmail.com> wrote:

> Peer 2 Peer SIP (or other protocol) is the future of
> telephony. 
> 
> Speex will work but you need to compile and install
> it separately from 
> Asterisk (and before Asterisk) due to licensing
> issues with Digium.  Not 
> sure why you would want to use speex but here is a
> good link on the wiki 
> with additional info.  
>
http://www.voip-info.org/wiki/view/Asterisk+config+codecs.conf
> 
> I have only used it for very low bandwidth
> applications and satellite 
> connections.  It increased latency but the audio was
> almost perfect 
> where other codecs broke up so badly that a
> conversation was impossible.
> 
> Thanks,
> Steve
> 
> Madhuri Patwardhan wrote:
> > Yes. I understand that. I am considering a case
> where
> > the call is IP end to end. 
> >
> > Madhuri
> >
> > --- "Eric \"ManxPower\" Wieling" <eric at fnords.org>
> > wrote:
> >
> >   
> >> Madhuri Patwardhan wrote:
> >>     
> >>> Hi,
> >>>
> >>> Does Asterisk support wideband VoIP? Is there
> >>>       
> >> support
> >>     
> >>> for Speex 16 KHz?
> >>>       
> >> What devices support this?
> >>
> >> As I'm sure you know, if the call hits the PSTN
> it
> >> will always be ulaw 
> >> or alaw and so will not be wideband.  Wideband
> >> codecs are only helpful 
> >> if the call IP end to end.
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