[AVT] draft-ietf-avt-rtp-vmr-wb-03: MIME type

[Magnus Westerlund <[e-mail]>]

Hi,

I mentioned this before in a discussion note, that if you like to 
utilize the magic numbers etc properly. Then you should in fact define 
parameters that do tell a receiver prior to downloading a body the fact 
on what it will download. Thus a need for MIME parameters.

I have also in the review found that the MIME registration is not as 
clear as would be desirable on what parameters do apply to.

First, the MIME parameters do not all apply to the file format. In my 
view the only parameters making sense for the file format are:
- channels
- rate
- mode-set
- dtx
 From these parameters a receiver can determine, if it is multi-channel 
or not, if the mode-set is equal to 3, indicating interoperable mode. 
Mode set does also support future extension, when new mode sets are 
defined.

Second, I think there is need to clarify better what applies to the two 
different use cases by being explicit about it. I will read Ned Freed's 
draft to determine it it recommends any language for this.

Cheers

Magnus Westerlund

Multimedia Technologies, Ericsson Research EAB/TVA/A
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