Re: [MMUSIC] Re: draft-rajeshkumar-mmusic-gpmd-03.txt

Tom Taylor wrote:

> Thanks for the update.  I did see Ned Freed's remarks on the IESG I-D tracker, but
> wasn't sure if they were the cause of the remit to the authors.
>
> I know we've been there before, but one quick fix would be to add a parameter to
> the PCMU and PCMA MIME types to indicate voice-band data.
>

It wouldn't address the V.150.1 issue though, which is already using the gpmd
parameter. Also, some medium bw codecs are capable of passing lower-rate modulations
inband, so you could still support voice-band data with codecs other than PCMU and
PCMA. Admittedly, the set of relevant codecs is fairly manageable in practice, but it
would be nice to have a general parameter to address it.

-- Flemming

>
> Flemming Andreasen wrote:
>
> > At the risk of misrepresenting the IESG, let me offer my interpretation
> > of the comments we got from the IESG:
> >
> > 1. Concerns about the mechanism itself inasmuch as it may be (mis)used
> > to essentially redefine the meaning of an otherwise well-defined MIME
> > type. You may also have general "bucket" MIME types, the meaning of
> > which depend on parameters provided by something like gpmd. There are
> > some concerns with what that means for interoperability.
> > 2. Overlap with existing media feature tagging mechanims defined in RFCs
> > 2533, 2534, 2912, 2938, and 2987
> >
> > The authors have yet to figure out if and how those issues should be
> > resolved. One option is simply to kill the draft and just fallback to
> > the specifc vbd-definition already provided in ITU-T Recommendation
> > V.150.1. The intent with the draft of course was precisely not to do
> > that, but considering that the vbd-definition is really all we were
> > after, this may be getting into being a bit of an overkill. The only
> > "real" issue that would leave us with is getting the parameter
> > registered, and although Standards Track RFCs are preferred for that,
> > sdp-new does permit attributes to be registered per the "Specification
> > Required" policy; for at least the vbd-specific usage of gpmd, I believe
> > we would be close enough to pass that bar.
> >
> > -- Flemming
> >
> >
> > Tom Taylor wrote:
> >
> >
> >>The IESG ID tracker shows that the IESG requested changes to
> >>draft-rajeshkumar-mmusic-gpmd-03.txt.  What was the nature of those
> >>changes, and where does the process stand?
> >
> >
> >
>
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