RE: [AVT] RFC 2733 vs 3119

["Adam Li" <adamli at icsl.ucla.edu>]

Hi,

I believe RFC 2733 and 3119 should be able to be implemented together.
The two RFCs are improving the robustness in different areas. I can try
to summarize them in some simple word and hope it is helpful.

For example, in 10% error channels, when you send 100 units of data, you
get 90 units. RFC 2733 works in this scenario by sending 115 units of
data, and hope you can get 100 units. RFC 2733 works for any media in
payload.

On the special case of MP3, when you send 100 units through the same
channel, and receive 90 units, maybe only 80 units of them are useful
(because of the dependency). RFC 3119 helps by rearranging the data so
that all received 90 units would be useful. It does not add data
overhead for the MP3 stream.

The explanation is a little over simplified. You might want to read the
RFCs to understand how they work. By the way, RFC 2733 is planned to be
obsolete by a new draft
http://www.ietf.org/internet-drafts/draft-ietf-avt-ulp-10.txt. 

Hope it helps.

Adam


 
 
-----Original Message-----
From: avt-bounces at ietf.org [mailto:avt-bounces at ietf.org] On Behalf Of
McArthor Lee
Sent: Saturday, September 11, 2004 1:44 AM
To: avt at ietf.org
Subject: [AVT] RFC 2733 vs 3119

hi list,

as to lost packet recovery of real-time MP3 transmission, which one,
among RFC 2733 (FEC) and RFC 3119 (ADU), is more efficient, taking into
consideration the tradeoff of redundancy and recovery ability?

also, can RFC 2733 and 3119 be implemented together?

plz give me a decription in detail

======================= 
Thanks & Regards 
McArthor Lee 


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