[Asterisk-Users] G729 Codec+packet loss concealment

[clive18 at webmail.co.za]

On Tue, 3 Aug 2004 05:47:59 -0400
 Andrew Kohlsmith <akohlsmith-asterisk at benshaw.com> wrote:
> On Tuesday 03 August 2004 02:58, clive18 at webmail.co.za
> wrote:
> > From what I have heard, Asterisk does not allow for
> iLBC to
> > take advantage of the lost packet concealment.
> > I understand this has something to do with the jitter
> > processing.
> 
> Can you provide a source for that statement?  I am not
> disputing it but I'd 
> like to have it in the archives for one, but also to
> verify the claim too.
> 
> Regards,
> Andrew
Hi

Here I am quoting Steve Davies:

"For IAX2, at least, Asterisk does not use the
lost-packet-concealment of any codec. This is because the
incoming frames "clock" Asterisk. For iLBC's lost packet
concealment to work, Asterisk would have to start calling
the decoder with a NULL at the point when the missing
packet should 
have arrived.

Can't say for sure for SIP, but I'd guess that its the
same.

Steve"

Regards
Clive
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