Re: Media Types in 3GPP Timed text draft (was: RE: [AVT] RTP and Media Types)

[Dave Singer <singer at apple.com>]

At 5:55 PM +0200 8/9/04, Magnus Westerlund wrote:
> Hi,
>
> As the RTP payload format is developed in IETF, rather than 3GPP I 
> think the MIME type used to identify that RTP payload format belongs 
> in the IETF tree. Especially as the vendor tree implies that the 
> 3GPP has control over the registration and any updates, which I 
> don't think is appropriate for this payload format.
>
> The question is if 3GPP timed text should be registered in video, 
> text, or both. My reasoning behind actually registering in both 
> media types, would if one had clear indications that both are 
> appropriate for different usages of the RTP payload format.

I think both is the worst choice;  it's asking for interop problems, isn't it?

> Cheers
>
> Magnus
>
> Colin Perkins wrote:
>
> > [Please keep the AVT list as a cc, so the authors of the draft get a copy]
> >
> > The aim here is to register the media type for use in RTP sessions, 
> > which are negotiated using SIP. Registering it under "application" 
> > or "vnd.3gpp" would complicate the signalling, and it would be 
> > preferable from our point of view to register this under "text" or 
> > "video" (as has been done with other RTP payload formats).
> >
> > That said, I'm not sure how the vnd tree works, so there may be a 
> > good reason to register it there, and then work out how to change 
> > SIP and/or SDP to make use of it.
> >
> > Colin
>
> --
>
> Magnus Westerlund
>
> Multimedia Technologies, Ericsson Research EAB/TVA/A
> ----------------------------------------------------------------------
> Ericsson AB                | Phone +46 8 4048287
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> S-164 80 Stockholm, Sweden | mailto: magnus.westerlund at ericsson.com
>
> _______________________________________________
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--
David Singer
Apple Computer/QuickTime

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