[Asterisk-Users] G729 Codec

[Adam Hart]

Steve Underwood wrote:
> Adam Hart wrote:
> 
>> Daniel Niasoff wrote:
>>
>>> Is G729 more sensitive to packet loss or delays due to it’s higher 
>>> compression. If I’ve generally got the bandwidth available, am I best 
>>> sticking to ulaw.
>>>
>>
>> G.729 has lost packet concealment, G.711 doesn't. G.711 will sound 
>> better otherwise if you can afford the bandwidth.
> 
> 
> Eh? G.729 has no particular features to allow more effective packet loss 
> concealment. iLBC has, but at the cost of a substantially higher bit 
> rate. In fact G.711 is a little ahead of G.729 in the regard, since 
> packets are completely independant. The smoothing in G.729 means you 
> need the previous packet to decode the current one properly.
> 
> Regards,
> Steve
> 

I believe you're mistaken - G.729 works similar to iLBC and speex. iLBC 
works better as the packets are independent but G.729 still has a 
function for packet loss concealment.

prehaps have a look at http://www.speex.org/comparison.html

-Adam