[AVT] RE: Clearmode definition.

I introduced Nx64kbit/s into one of the early
versions of the Clearmode draft, to open a 
discussion about this issue (after an according
request in the AVT mailing list).
In response we had a discussion about this issue
in AVT and PWE3 and finaly decided to reduce
the Clearmode draft to 1X64kbit/s - for several
reasons.

1)
There were several drafts to this time 
dealing with Nx64kbit/s and PWE3 was in the 
process to harmonize them into one. We didn't 
want to come up with an additional approach.

2)
Just introducing a parameter N for Nx64kbit/s
is not enough. For N>1 you must describe how
the channels are packed in the RTP packet.
And there are several alternatives.
Additionally other information is needed.

There was a controverse discussion in PWE3
which leaded to reason
3)
When we discussed this issue with PWE3, it
became clear that the Nx64kbit/s would need
much more time to finish then a pure
Clearmode draft and we wanted to speed up
the MIME type registration for Clearmode.

So I agree with Colin, that we leave Nx64kbit
the the PWE3 group.

Regards, Ruediger

> -----Original Message-----
> From: Rajesh Kumar [mailto:rkumar@cisco.com] 
> Sent: Thursday, March 18, 2004 9:18 PM
> To: Colin Perkins
> Cc: Kreuter Ruediger; avt@ietf.org; 
> magnus.westerlund@ericsson.com; dea@cisco.com; 
> hisham@cisco.com; rbiskner@cisco.com; miriyala@cisco.com
> Subject: Re: Clearmode definition.
> 
> 
> At 08:12 PM 3/18/2004 +0000, Colin Perkins wrote:
> >--> Rajesh Kumar <rkumar@cisco.com> writes:
> > > Are there plans to address N x 64 clear mode (N > 1) in 
> > > draft-ietf-avt-rtp-clearmode-04.txt ?
> > >
> > > One method might be to have N as a MIME parameter.
> > >
> > > I recommend that we do.
> >
> >No. This is explicitly out of scope of AVT, and will be addressed in 
> >the PWE3 working group.
> 
> I do not understand why 64 kbps clearmode is any different 
> from 384 kbps. 
> Both can be negotiated codecs for a session type. N x 64 should be 
> negotiable session by session and not just relegated to the 
> provisioned 
> tunnel category. I recommend a MIME definition for it if you 
> do not want to 
> fold it into the MIME for 64 kbps clear mode, although I 
> would prefer the 
> latter.
> 
> 
> 
> >--
> >Colin Perkins
> >http://csperkins.org/
> 

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