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

Gonzalo Salgueiro <gsalguei@cisco.com> Fri, 20 May 2011 08:56 UTC

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From: Gonzalo Salgueiro <gsalguei@cisco.com>
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Date: Fri, 20 May 2011 04:56:14 -0400
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To: Yasubumi CHIMURA <chimura730@oki.com>, "Miguel A. Garcia" <Miguel.A.Garcia@ericsson.com>
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Cc: OKUMURA Shinji <shinji.okumura@softfront.jp>, mmusic <mmusic@ietf.org>
Subject: Re: [MMUSIC] Process for draft-salgueiro-mmusic-image-iana-registration
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Yasu & Miguel - 

I also completely agree with Miguel's assessment that there is no value in describing the packet format that is already well defined in T.38.

I have submitted an -02 version capturing the comments from this discussion. 

Please provide any feedback regarding the latest version of this draft.

Regards,

Gonzalo
 
On May 20, 2011, at 12:51 AM, Yasubumi CHIMURA wrote:

> 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:Miguel.A.Garcia@ericsson.com] 
> 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:Miguel.A.Garcia@ericsson.com]
>> 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: mmusic-bounces@ietf.org [mailto:mmusic-bounces@ietf.org] 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
>>>> +34-91-339-3608
>>>> Ericsson Spain
>>>> _______________________________________________
>>>> mmusic mailing list
>>>> mmusic@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/mmusic
>> 
> 
> -- 
> Miguel A. Garcia
> +34-91-339-3608
> Ericsson Spain