Re: [MMUSIC] Reply to Liaison statement to IETF concerning 3D video

Bert Greevenbosch <> Wed, 22 May 2013 05:58 UTC

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From: Bert Greevenbosch <>
To: Mary Barnes <>, Flemming Andreasen <>, =?utf-8?B?QXJpIEtlcsOkbmVu?= <>
Thread-Topic: [MMUSIC] Reply to Liaison statement to IETF concerning 3D video
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Date: Wed, 22 May 2013 05:57:49 +0000
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Subject: Re: [MMUSIC] Reply to Liaison statement to IETF concerning 3D video
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Although I agree that the reversion of the draft to individual status was justified at the time, I fail to see how it is relevant to 3GPP. It seems an internal IETF process issue to me.

I agree with Flemming's draft response about the reasons for ceasing the work on this.

Best regards,

-----Original Message-----
From: [] On Behalf Of Mary Barnes
Sent: 2013年5月20日 22:40
To: Flemming Andreasen
Cc: Ari Keränen; mmusic
Subject: Re: [MMUSIC] Reply to Liaison statement to IETF concerning 3D video

Whether or not you explicitly mention the IPR, I think it should be
mentioned that the document was adopted as a WG document but latter
dropped due to some of the reasons you note. It it not a common
occurrence for a document to be agreed as a WG document and then
shortly thereafter have that decision revert. So, I think it's worth a


On Fri, May 17, 2013 at 1:01 PM, Flemming Andreasen <> wrote:
> On 5/16/13 4:21 PM, Mary Barnes wrote:
>> I'm just curious if it was intentional to leave out the fact that two
>> of the documents were agreed as WG documents (and submitted as such)
>> in November 2011:
>> but were dropped after the IPR declaration appeared in Feb 2012:
>> Then, they came back as individual again and there was not enough
>> interest to pick them up again:
>> I'm not debating the conclusion at all, but it seems to me that
>> leaving out the fact that there were at one time agreed as WG
>> documents and later dropped due to IPR/lack of interest is a relevant
>> fact.
> I wouldn't say the drafts were dropped due to IPR (but understand that
> different people may have different opinions on this), however the lack of
> an IPR disclosure prior to the documents' original adoption as WG items
> resulted in them going back to individual drafts. IPR disclosures were then
> made in accordance with IETF requirements, and following that, we had a
> renewed discussion in the WG around interest in the work as well as relevant
> expertise in the WG. As part of that, we noted the lack of coordination with
> and requirements from external bodies with respect to 3D video. There were
> also different opinions on the technical approach. In the end, as you note,
> there was not sufficient interest or concensus in the WG for adopting the
> work (as noted below).
> If you think it's important to convey the IPR issue and the history around
> that, we can certainly do so. Personally, I don't think it changes anything
> and wouldn't want to suggest any presupposition as to what the WG might want
> to do if MPEG were to express a need for this work, but I'm open either way.
> Thanks
> -- Flemming
>> Mary.
>> On Thu, May 16, 2013 at 2:58 PM, Ari Keränen <>
>> wrote:
>>> Here is what we are planning to send as a response to the 3GPP liaison
>>> request regarding 3D video work at MMUSIC (for details, see
>>> Regards,
>>> Ari & Flemming (MMUSIC co-chairs)
>>> ---
>>> Title:    Reply to Liaison statement to IETF concerning 3D video formats
>>> signalling in SDP
>>> Source: IETF MMUSIC WG
>>> To:     TSG-SA WG4
>>> The MMUSIC Working Groups thanks SA4 for their information request around
>>> work related to SDP signaling of 3D video formats. At the present time,
>>> the
>>> MMUSIC WG does not have any active work in this area.
>>> For your information, the MMUSIC WG did previously (in 2012) consider
>>> work
>>> in this area based on the following 3 documents:
>>> The drafts were presented in a couple of meetings and discussed on the
>>> MMUSIC mailing list, however there was not significant interest nor
>>> technical agreement in the WG for adoption of these items at the time. It
>>> was also believed that additional 3D video expertise and alignment with
>>> MPEG
>>> would be needed to adequately cover this area. In lieu of the above, the
>>> work was not adopted.
>>> The MMUSIC WG would welcome further input from SA WG4 on this matter.
>>> Next IETF meetings:
>>> - IETF 87 July 28 - August 2, 2013, Berlin, Germany
>>> - IETF 88 November 3-8, 2013, Vancouver, BC, Canada
>>> Regards,
>>> Flemming Andreasen and Ari Keränen
>>> MMUSIC WG co-chairs
>>> _______________________________________________
>>> mmusic mailing list
>> .
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