[asterisk-users] g729 open source codec and sample size

Eric "ManxPower" Wieling eric at fnords.org
Tue Jun 10 11:19:04 CDT 2008


The G729 codec is neither open source, nor is it free, and the 
license/patent does not make an exception for "educational use".

The Intel LIBRARIES are free for educational/personal use, but the 
license for that software says that you still need a license from the 
G729 patent holder before use.

I don't understand why people won't pay $10/channel for a fully 
licensed, legal, and Asterisk supported G729 codec.

Manoj_Rajkarnikar wrote:
> Greetings.
> 
> I'm new to the asterisk & voip world and I'm currently trying out trixbox 
> 2.6.0.7 on a p4 1.8 GHz box. I've downloaded and used the open source g729 
> codec from site http://asterisk.hosting.lv/ and is working fine. question 
> here is that this codec sends out a packet every 20ms. Though the speech 
> quality is very good, I also like to try out 30ms sampling size to bring 
> down the overhead payload and reduce bandwidth usage. I've searched for it 
> for a couple days with no indication of how to do it. is it possible to 
> change it. do i have to compile my own codec module.. or some patch to 
> asterisk code?? Please suggest.
> 
> Thanks a lot.
> 
> Manoj
> 

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