Subject: [MMUSIC] Setup of asymmetric media

From: "Ingemar Johansson S" <[email-masked]>
Date: Mon, 11 Jan 2010 13:28:08 +0100

Hi

The issues with the setup of asymmetric media has been lurking about for instance in AVT. It is quite likely that issues with asymmetric media will show up even more in the future, one use case that can potentially cause a lot of issues in this area is rich conferencing.

Almost a year ago I scribbled on an extentsion to the SDPCapNeg/SDPMedCapNeg framework. 
http://tools.ietf.org/html/draft-johansson-mmusic-asymmetric-media-00
There was not too much of a response (thanks Bob for your comments).

My question is what can we do about it.
1) Live with the current method which means
 1a) Implement support for asymmentry for each new payload format
 1b) Use multiple media descriptors, ugly but it probably works to some extent
2) Extension to SDPCapNeg/SDPMedCapNeg 
3) Something completely new (SDP*, XMPP)

/Ingemar

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INGEMAR JOHANSSON  M.Sc. 
Senior Research Engineer 

Ericsson AB
Multimedia Technologies
Labratoriegränd 11
971 28, Luleå, Sweden
Phone +46-1071 43042
SMS/MMS +46-73 078 3289
[email-masked]
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