Re: [MMUSIC] Process for draft-salgueiro-mmusic-image-iana-registration

["Yasubumi CHIMURA" <[e-mail]>]

Hi Miguel,

Thank you for your support about Draft of "image" for T.38 SDP.
I agree your opinion.

Best Regards,

Yasu Chimura
-----Original Message-----
From: Miguel A. Garcia [mailto:[e-mail]] 
Sent: Thursday, May 19, 2011 4:30 PM
To: Yasubumi CHIMURA
Cc: 'DRAGE, Keith (Keith)'; 'mmusic'; 'Flemming Andreasen'; 'Noriyuki SATO';
'OKUMURA Shinji'; Gonzalo Salgueiro
Subject: Re: [MMUSIC] Process for
draft-salgueiro-mmusic-image-iana-registration

Hi Yasu,

My opinions, as an individual, below.

On 18/05/2011 13:54, Yasubumi CHIMURA wrote:
> Hi Miguel,
>
> I'm Chimura from OKI-J and CIAJ.
>
> I have one comment about draft-salgueiro-mmusic-image-iana-registration.
>
> RFC4566 described the procedure following;
> RFC4566 p24
> 	The media type registration SHOULD define the packet
> 	format for use with UDP transport.
> 	...
> 	For media using other transport protocols, the<fmt>  field is
> 	protocol specific.  Rules for interpretation of the<fmt>  sub-
> 	field MUST be defined when registering new protocols (see Section
> 	8.2.2).
>
> Therefore, if it use without UDP transport in m=image, should be describe
> the packet format.
 >
> And, if it use with UDP transport in m=image, should be describe the
> definition of fmt and the attribution(a=) of SDP.

I get the point, I belive. But I doubt we can just define a single packet 
format for sending any type of "image" media types. I guess we should say 
that T38 is one of the possible packet formats, and the full packet 
format description when using UDP transport is described in ITU-T T.38 
recommendation. If in the future, there are additional formats of "image" 
with UDP, then a different specification should describe the packet format.

Also, notice that T38 allows several transport protocols, including TCP, 
UDP, UDPTL, RTP.

My suggestion is that the registration of the media type "image" 
delegates the packet format description over UDP to the media format 
description. Also, the draft should say that, when T38 is the media 
format, ITU-T T.38 contains the packet format description.

BR,

    Miguel
>
> Best Regards,
>
> Yasu Chimura
> -----Original Message-----
> From: Miguel A. Garcia [mailto:[e-mail]]
> Sent: Tuesday, May 10, 2011 2:51 PM
> To: DRAGE, Keith (Keith)
> Cc: mmusic; Flemming Andreasen; 'Yasubumi CHIMURA'
> Subject: Re: [MMUSIC] Process for
> draft-salgueiro-mmusic-image-iana-registration
>
> Hi Keith,
>
> An individual document will not go through an official WGLC, but I guess
> the working group can always get a closer look at it before the author
> submitting it as an individual submission.
>
> /Miguel
>
> On 09/05/2011 17:50, DRAGE, Keith (Keith) wrote:
>> If you are going to WGLC this document, surely you might as well make
this
> a working group draft.
>>
>> If it is AD sponsored, then the first question is sufficient - look at it
> now, and then it goes for a four week IETF last call.
>>
>> Keith
>>
>>> -----Original Message-----
>>> From: [e-mail] [mailto:[e-mail]] On Behalf
>>> Of Miguel A. Garcia
>>> Sent: 09 May 2011 08:04
>>> To: mmusic
>>> Cc: Flemming Andreasen; 'Yasubumi CHIMURA'
>>> Subject: [MMUSIC] Process for draft-salgueiro-mmusic-image-iana-
>>> registration
>>>
>>> In relation with the registration of the SDP 'image' media type, we are
>>> going to try to expedite this draft, since it is a very simple missing
>>> registration.
>>>
>>> The idea is to progress the draft as an individual submission,
>>> AD-sponsored draft. So, the chairs would like the working group to take
a
>>> closer look at it (it is a short one), so that we can go to WGLC in a
>>> short time frame.
>>>
>>> So please, send comments as soon as possible. Do not wait to the WGLC.
>>>
>>> BR,
>>>
>>>        Miguel
>>> --
>>> Miguel A. Garcia
>>> [phone]
>>> Ericsson Spain
>>> _______________________________________________
>>> mmusic mailing list
>>> [e-mail]
>>> https://www.ietf.org/mailman/listinfo/mmusic
>

-- 
Miguel A. Garcia
[phone]
Ericsson Spain