07-30170894-DC.pdf

a Date: 24 August 2007 Origin: International Latest date for receipt of comments: 30 November 2007 Project no.: 2007/02335 Responsible committee: CPW/36 Cinematography Interested committees: Title: Draft BS ISO 26431-1: Digital cinema (D-cinema) quality - Part 1: Screen luminance level, chromaticity and uniformity Supersession information: If this document is published as a standard, the UK implementation of it will supersede NONE and partially supersede. NONE If you are aware of a current national standard which may be affected, please notify the secretary (contact details below). WARNING: THIS IS A DRAFT AND MUST NOT BE REGARDED OR USED AS A BRITISH STANDARD. THIS DRAFT IS NOT CURRENT BEYOND 30 November 2007. This draft is issued to allow comments from interested parties; all comments will be given consideration prior to publication. No acknowledgement will normally be sent. See overleaf for information on commenting. 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Cross-references The British Standards which implement International or European publications referred to in this draft may be found via the British Standards Online Service on the BSI web site http:/www.bsi-global.com. Direct tel: 020 8996 7009 Responsible Committee Secretary: Committee Service Centre (BSI) E-mail: cscbsi-global.com Draft for Public Comment Head Office 389 Chiswick High Road London W4 4AL Telephone: +44(0)20 8996 9000 Fax: +44(0)20 8996 7001 Form 36 Version 7.0 DPC: 07/30170894 DC Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:41:41 GMT+00:00 2007, Uncontrolled Copy, (c) BSI b Introduction This draft standard is based on international discussions in which the UK has taken an active part. Your comments on this draft are invited and will assist in the preparation of the consequent standard. Comments submitted will be reviewed by the relevant BSI committee before sending the consensus UK vote and comments to the international secretariat, which will then decide appropriate action on the draft and the comments received. If no comments are received to the contrary, then the UK will approve this draft. If the international standard is approved, it is possible the text will be published as an identical British Standard. UK Vote Please indicate whether you consider the UK should submit a negative (with reasons) or positive vote on this draft. Submission The guidance given below is intended to ensure that all comments receive efficient and appropriate attention by the responsible BSI committee. Annotated drafts are not acceptable and will be rejected. All comments must be submitted, preferably electronically, to the Responsible Committee Secretary at the address given on the front cover. 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Amend to read . so that the mains connector to which no connection . 6.4 Paragraph 2 te The use of the UV photometer as an alternative cannot be supported as serious problems have been encountered in its use in the UK. Delete reference to UV photometer. Microsoft and MS-DOS are registered trademarks, and Windows is a trademark of Microsoft Corporation. Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:41:41 GMT+00:00 2007, Uncontrolled Copy, (c) BSI In accordance with the provisions of Council Resolution 15/1993 this document is circulated in the English language only. Conformément aux dispositions de la Résolution du Conseil 15/1993, ce document est distribué en version anglaise seulement. THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH. IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME STANDARDS TO WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS. RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION. © International Organization for Standardization, 2007 DRAFT INTERNATIONAL STANDARD ISO/DIS 26431-1 Attributed to ISO/TC 36 by the Central Secretariat (see page iii) Voting begins on Voting terminates on 2007-08-24 2008-01-24 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION Digital cinema (D-cinema) quality Part 1: Screen luminance level, chromaticity and uniformity Qualité du cinéma D Partie 1: Niveau de luminance d'écran, chromaticité et uniformité ICS 37.060.99 FAST-TRACK PROCEDURE Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:41:41 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ISO/DIS 26431-1 PDF disclaimer This PDF file may contain embedded typefaces. 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Violators may be prosecuted. ii © ISO 2007 All rights reserved Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:41:41 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ISO/DIS 26431-1 © ISO 2007 All rights reserved iii NOTE FROM THE ISO CENTRAL SECRETARIAT This draft International Standard is submitted for voting to ISO member bodies under the fast-track procedure. ISO 26431-1 was prepared by the Society of Motion Picture and Television Engineers (SMPTE) (as SMPTE Standard SMPTE 431-1-2006) and is submitted for approval under a special “fast-track procedure”, by Technical Committee ISO/TC 36, Cinematography, in parallel with its approval by the ISO member bodies (see the ISO/IEC Directives, Part 1, 2004, Annex F, F.2.1.1). F.2 “Fast-track procedure” F.2.1 Proposals to apply the fast-track procedure may be made as follows. F.2.1.1 Any P-member or category A liaison organization of a concerned technical committee may propose that an existing standard from any source be submitted for vote as an enquiry draft. The proposer shall obtain the agreement of the originating organization before making a proposal. The criteria for proposing an existing standard for the fast-track procedure are a matter for each proposer to decide. F.2.1.2 An international standardizing body recognized by the ISO or IEC council board may propose that a standard developed by that body be submitted for vote as a final draft International Standard. F.2.1.3 An organization having entered into a formal technical agreement with ISO or IEC may propose, in agreement with the appropriate technical committee or subcommittee, that a draft standard developed by that organization be submitted for vote as an enquiry draft within that technical committee or subcommittee. F.2.2 The proposal shall be received by the Chief Executive Officer, who shall take the following actions: a) settle the copyright and/or trademark situation with the organization having originated the proposed document, so that it can be freely copied and distributed to national bodies without restriction; b) for cases F.2.1.1 and F.2.1.3, assess in consultation with the relevant secretariats which technical committee/subcommittee is competent for the subject covered by the proposed document; where no technical committee exists competent to deal with the subject of the document in question, the Chief Executive Officer shall refer the proposal to the technical management board, which may request the Chief Executive Officer to submit the document to the enquiry stage and to establish an ad hoc group to deal with matters subsequently arising; c) ascertain that there is no evident contradiction with other International Standards; d) distribute the proposed document as an enquiry draft (F.2.1.1 and F.2.1.3) in accordance with 2.6.1, or as a final draft International Standard (case F.2.1.2) in accordance with 2.7.1, indicating (in cases F.2.1.1 and F.2.1.3) the technical committee/subcommittee to the domain of which the proposed document belongs. F.2.3 The period for voting and the conditions for approval shall be as specified in 2.6 for an enquiry draft and 2.7 for a final draft International Standard. In the case where no technical committee is involved, the condition for approval of a final draft International Standard is that not more than one-quarter of the total number of votes cast are negative. F.2.4 If, for an enquiry draft, the conditions of approval are met, the draft standard shall progress to the approval stage (2.7). If not, the proposal has failed and any further action shall be decided upon by the technical committee/subcommittee to which the document was attributed in accordance with F.2.2 b). If, for a final draft International Standard, the conditions of approval are met, the document shall progress to the publication stage (2.8). If not, the proposal has failed and any further action shall be decided upon by the technical committee/subcommittee to which the FDIS was attributed in accordance with F.2.2 b), or by discussion between the originating organization and the office of the CEO if no technical committee was involved. If the standard is published, its maintenance shall be handled by the technical committee/subcommittee to which the document was attributed in accordance with F.2.2 b), or, if no technical committee was involved, the approval procedure set out above shall be repeated if the originating organization decides that changes to the standard are required. Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:41:41 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Licensed Copy: London South Bank University, London South Bank University, Fri Oct 05 02:41:41 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 1 Scope This standard specifies the absolute luminance level, white point chromaticity, and luminance uniformity of the reflected screen light for the presentation of motion pictures by projectors with digital light engines in review rooms and commercial cinemas. It is the purpose of this specification to achieve the tone scale and contrast in the projected image that will correspond to that intended during the mastering process. 2 Normative reference The following standards contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreement based on this standard are encouraged to investigate the possibility of applying the most recent edition of the standards indicated below. ISO/CIE 10527-1991, Colorimetric Observers 3 Performance classes It should be recognized that different applications within the industry have varying requirements for tolerances, or the precision of the target specifications attained in any particular installation. For example, greater precision may be required for a system in a mastering suite than in a commercial cinema theatre. In order to simplify communication, two levels or classes of precision are defined herein as follows: Review Room intended as the highest practical precision, for the most critical colorimetry applications, recommended for the mastering activities of color timing and color matching. Theater intended as the minimum level for commercial cinema presentations. Performance criteria for each class are defined in section 5. 4 Measurement criteria 4.1 Projector conditions Measurements shall be made with the projector in normal operation, with its lens(es) set at optimal focus position, set for the format covering the largest area of