[Asterisk-Dev] 16 KHz audio ?

[Eric Bart]

> >Please read this skype experience:
> >http://www.vonage-forum.com/article312.html
> >
> Isn't marketing material wonderful? :-)

Oops. Is Vonage now selling Skype ?

Whatever. I've tested Skype. I'm telling it's HiFi !!!


> >Skype may be using a 24 KHz bandwidth. I know that they're also using
> >a very good compression codec.
> >  
> >
> I think 24kbps is rather more likely than 24kHz bandwidth :-)

No. I read in a forum that someone saw that Skype was opening a sound card 
driver at 48KHz. Why would it if not for using it ?

It's not because you're sampling at 48K that you'll get a huge output rate.
It depends on the codec efficiency.

> Skype uses iLBC. 

It's using some globalipsound technology.
http://www.globalipsound.com/customers_partners/customers_partners.php
http://www.globalipsound.com/solutions/solutions_Codecs.php


> I think the wideband version of iLBC is 24kbps.

On my PC I have 4 DivX audio codecs for 44KHz : 32, 22, 20 and 16 Kbps

I'm sure it's possible to get a streaming 24KHz bdwdth in 24kbps. However 
maybe it's not available for a gnu software.