From carson@siggraph.org Mon Sep 29 21:02:13 1997 Received: from siggraph.cgrg.ohio-state.edu (siggraph.cgrg.ohio-state.edu [128.146.18.100]) by dkuug.dk (8.6.12/8.6.12) with ESMTP id VAA09383 for ; Mon, 29 Sep 1997 21:02:11 +0100 Received: from study.huntleigh.net (carson@siggraph.org) by siggraph.cgrg.ohio-state.edu (8.8.5/941010.52) with SMTP id QAA01726; Mon, 29 Sep 1997 16:01:55 -0400 (EDT) Message-Id: <3.0.32.19970929140705.00a7bc68@siggraph.cgrg.ohio-state.edu> X-Sender: carson@siggraph.cgrg.ohio-state.edu X-Mailer: Windows Eudora Pro Version 3.0 (32) Date: Mon, 29 Sep 1997 14:07:22 -0600 To: SC24@dkuug.dk From: Steve Carson Subject: Proposal to MPEG-4 Cc: neil.trevett@3dlabs.com, jch@merl.com, msc@sgi.com, bblau@intervista.com, honda@soft.arch.sony.co.jp Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" This is the text of our proposal to the MPEG-4 ad-hoc group made during the meeting last week in Rennes. We made it clear that this is subject to ratification by both the VRML Consortium and SC 24. At this point, it is best to think of this proposal as background for understanding the final plan and summary that I previously circulated. Over the next week or so I will be working with the leaders of the MPEG-4 BIFS and Systems ad-hoc groups to finalize a common position statement that both groups can agree to. Please let me know if you want to participate in the activity to craft this statement. I will circulate the text of the proposal from MPEG-4 to SC24 and the VRML Consortium tomorrow. I have only a paper copy at the moment. - - - Proposal from SC 24 and VRML Consortium Wednesday afternoon, 25 Sept 1997 1. We believe that the VRML functional specification (or possibly a profile of that specification) meets the requirements of MPEG-4. We are willing to cooperate with SC 29/ WG 11 in a short ( 1 month or so) effort to determine what the appropriate subset of VRML is, and to craft any necessary text for the MPEG-4 CD to make a normative reference to the VRML standard. This represents a change from the previous VRML Consortium / SC 24 position. 2. We believe that the interoperability of implementations of standards as well as the long term evolution of the standards themselves is unacceptably compromised when the normative text of one standard is repeated within another. Therefore, in accordance with long established and accepted practices within ISO and IEC as well as the practices of the VRML Consortium, and in accordance with International Copyright law, we cannot accept an MPEG-4 specification that is a "derivative work" of the VRML specification. 3. If it is necessary for the timely production of the MPEG-4 CD text, we are willing to accept included text from VRML for the first CD only, with the understanding that the MPEG-4 text will be modified as to either make a normative reference as described in (1) or to re-write the text so that it is no longer derived from VRML as described in (2) above, for the next version (second CD or first DIS). If the first CD is done in this manner, then it shall contain a statement that the text will be modified as described in either (1) or (2) above at the next revision. 4. If MPEG-4 is willing to (a) make normative reference to VRML as described in (1) ; and (b) abide by the terms of the Cooperative Agreement between the VRML Consortium and ISO and IEC, SC 24 will agree to open future VRML work within ISO (including CD and DIS balloting) to include equal participation from SC29. This means that ISO meetings and ballots on VRML will be jointly conducted within the two subcommittees. 5. We are eager to cooperate with SC 29 /WG 11 so that MPEG and VRML may each evolve wherever possible based on compatible concepts, syntax and semantics. Steve Carson Chair, ISO/IEC JTC 1/SC 24 Computer Graphics and Image Processing --------------------------------------------------------- Steve Carson phone: +1-505-521-7399 GSC Associates Inc. fax: +1-505-521-9321 5272 Redman Road e-mail: carson@siggraph.org Las Cruces, NM 88011 USA ---------------------------------------------------------