asterisk users - Jun 2008 - g729 open source codec and sample size

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

--

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 
>  
>
you need to use the following parameter in your sip definitions (not 
sure if Trixbox will take it though)
disallow=all
allow=g729:30    ;30 is the frame size in ms

Andres
http://www.neuroredes.com
>asterisk code?? Please suggest.
>
>Thanks a lot.
>
>Manoj
>
>  
>

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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