Subject: Re: [AVT] Transmitting G729ab packets over network, Jeff Meunier

From: bino george <[email-masked]>
Date: Thu, 29 Nov 2001 22:54:21 -0800 (PST)

The "No trasmission Packet" from G.723/G.79
Encoder is  an information to the layer just above the
encoder for each design. That layer should be
intelligent enough to understand this "filler frames"
and forward only Voice and SID frames to the
packetizer.

    As  a  developer I  feel the 
draft-ietf-avt-profile-new-09.txt  as a good spec
espcially for G.729, help us to understand the
"variable packetization interval" issue at the design
level itself.

" A G.729 RTP packet may consist of zero or more G.729
or G.729 Annex A  frames, followed by zero or one
G.729 Annex B frames. The presence of a comfort noise
frame can be deduced from the length of the RTP
payload. The default packetization interval is 20
ms(two frames), but in some situations it may be
desireable to send 10 ms packets."

The depacketizer should be intelligent enough to parse
the packet into frames with only two information.
   1: codec.
   2: RTP payload Length.

If further discussion is based on this draft, then it
will be  helpful,  to  understand the issue better.
  thank you
bino

=====
Bino George 
5588257 extn 210 
"We have to define a new game instead of playing a game better"

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