1、BSI Standards PublicationBS ISO 12612:2016Cinematography Interchange of post-productionsprocket-based materialsBS ISO 12612:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 12612:2016. Itsupersedes BS ISO 12612:1997 which is withdrawn.The UK participation i
2、n its preparation was entrusted to TechnicalCommittee CPW/36, Cinematography.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correcta
3、pplication. The British Standards Institution 2016. Published by BSI StandardsLimited 2016ISBN 978 0 580 91744 8ICS 37.060.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Com
4、mittee on 31 March 2016.Amendments issued since publicationDate Text affectedBS ISO 12612:2016 ISO 2016Cinematography Interchange of post-production sprocket-based materialsCinmatographie change de matriaux post-production dentsINTERNATIONAL STANDARDISO12612Second edition2016-03-15Reference numberIS
5、O 12612:2016(E)BS ISO 12612:2016ISO 12612:2016(E)ii ISO 2016 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2016, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic
6、or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Gene
7、va, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 12612:2016ISO 12612:2016(E)Foreword iv1 Scope . 12 Normative references 13 Requirements for post-production picture elements 23.1 Cutting and perforating dimensions 23.2 Position and dimensions of picture areas
8、 23.3 Splices . 23.4 Requirements for photographic characteristics 23.4.1 Densitometry 33.4.2 Density of the original camera negative LAD test image (LAD control patch) . 33.4.3 Density of the LAD test image in master positive 33.4.4 Density of the LAD test image in duplicate negative 33.4.5 Density
9、 of the LAD test image in projection print. 33.5 Leaders for picture materials . 34 Requirements for post-production sound elements . 44.1 Cutting and perforating dimensions 44.2 Position, dimensions and track assignments 44.3 Nominal velocity 44.4 Recordings 44.5 Sound records to be interchanged fo
10、r making monophonic release prints (see A.3) . 44.6 Components of sound records to be interchanged for making 35 mm stereophonic release prints (see also A.3). 54.6.1 Stereophonic matrix encoded components 54.6.2 Stereophonic discrete components . 54.7 Sound records to be interchanged for making 70
11、mm release prints (see also A.3) 64.8 Requirements for sound record characteristics . 64.9 Leaders for sound materials 75 Packing and marking . 7Annex A (informative) Additional information . 9Bibliography .10 ISO 2016 All rights reserved iiiContents PageBS ISO 12612:2016ISO 12612:2016(E)ForewordISO
12、 (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical com
13、mittee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrot
14、echnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was draft
15、ed in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent righ
16、ts. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitu
17、te an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information.The commi
18、ttee responsible for this document is ISO/TC 36, Cinematography.This second edition cancels and replaces the first edition (ISO 12612:1997), of which it constitutes a minor revision.iv ISO 2016 All rights reservedBS ISO 12612:2016INTERNATIONAL STANDARD ISO 12612:2016(E)Cinematography Interchange of
19、post-production sprocket-based materials1 ScopeThis International Standard specifies certain parameters and technical characteristics of post-production motion-picture materials used in the international exchange of 35 mm and 70 mm picture and sound elements.This International Standard further speci
20、fies a method for the evaluation of picture-image quality based on a standardized test image contained in the post-production picture elements.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. Fo
21、r dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 5-2, Photography and graphic technology Density measurements Part 2: Geometric conditions for transmittance densityISO 5-3, Photography and
22、 graphic technology Density measurements Part 3: Spectral conditionsISO 162, Cinematography Head gaps and sound records for three-, four-, or six-track magnetic sound records on 35 mm and single-track on 17,5 mm motion-picture film containing no picture Positions and width dimensionsISO 491, Cinemat
23、ography 35 mm motion-picture film and magnetic film Cutting and perforating dimensionsISO 1039, Cinematography Cores for motion-picture and magnetic film rolls DimensionsISO 2467, Cinematography Image area produced by 65 mm/5 perforation motion-picture camera aperture and maximum projectable image a
24、rea on 70 mm/5 perforation motion-picture prints Positions and dimensionsISO 2906, Cinematography Image area produced by camera aperture on 35 mm motion-picture film Position and dimensionsISO 2907, Cinematography Maximum projectable image area on 35 mm motion-picture film Position and dimensionsISO
25、 2910, Cinematography Screen luminance and chrominance for the projection of motion picturesISO 3023, Cinematography 65 mm and 70 mm unexposed motion-picture film Cutting and perforating dimensionsISO 4241, Cinematography Projection leader (time-based), trailer and cue marks SpecificationsISO 4834,
26、Cinematography Magnetic sound test films excluding striped release prints Basic technical characteristicsISO 5758, Cinematography Labelling of containers for motion-picture film and magnetic material Minimum information for exchange of materials ISO 2016 All rights reserved 1BS ISO 12612:2016ISO 126
27、12:2016(E)ISO 6038, Cinematography Splices for use on 70 mm, 65 mm, 35 mm and 16 mm motion-picture films Dimensions and locationsISO 9525, Cinematography Recording head gaps for two sound records on 17,5 mm magnetic film Positions and width dimensions3 Requirements for post-production picture elemen
28、ts3.1 Cutting and perforating dimensionsCutting and perforating dimensions for photographic films shall be in accordance with ISO 491 and ISO 3023.3.1.1 For 35 mm original negatives, master positives and duplicate negatives: ISO 491 (preferred Type N perforation and 4,74 mm perforation pitch).3.1.2
29、For 35 mm projection prints: ISO 491 (Type P perforation and 4,75 mm perforation pitch).3.1.3 For 65 mm original negatives, master positives and duplicate negatives and for 70 mm projection prints: ISO 3023.3.2 Position and dimensions of picture areasPosition and dimensions of picture areas shall be
30、 in accordance with ISO 2906, ISO 2907, and ISO 2467.3.2.1 For 35 mm: ISO 2906 and ISO 2907.3.2.2 For 65 mm and 70 mm: ISO 2467.3.3 SplicesSplices shall be in accordance with ISO 6038.3.4 Requirements for photographic characteristicsThe photographic characteristics of post-production picture materia
31、ls to be interchanged shall be evaluated using densitometric measurements of a test image which is spliced into the original picture rolls and reproduced through the successive stages of duplication.The control method is based upon the Laboratory Aim Density system (LAD system) (see A.1 for a refere
32、nce concerning the implementation of this system), which assigns specific density values to a control patch in a test image which is spliced into the original camera film, and is then read at each stage throughout the sequence to the projection print. All scenes within the motion picture are graded
33、(timed) relative to the test image which is considered as a “perfect” scene.Density aim values are chosen so that the print-through equivalent neutral densities on each film in the post production sequence fall approximately at the mid-point of the straight line portion of that films characteristic
34、curves.This achieves the following two objectives:a) most significant picture information is placed on the linear portion of the duplicating films characteristic curve, carrying a maximum of highlight and shadow information;b) a neutral grey scale is maintained throughout the post-production, aiding
35、, in colour grading (timing).2 ISO 2016 All rights reservedBS ISO 12612:2016ISO 12612:2016(E)A suitable LAD control image begins as a camera image incorporating a uniform neutral patch of sufficient size for convenient densitometric measurements. This patch may be positioned within a scene suitable
36、for subjective evaluation. An 18 % reflectance grey card under scene illumination is usually appropriate. This LAD control image is spliced into the roll of original negative as specified in 3.5.3.Ultimately, picture quality will be reviewed subjectively, but within the tolerances of normal film, pr
37、inter and process variability, and the characteristics of specific duplicating film systems, objective measurements of the LAD system assist in readily obtaining consistent duplicates with good tone and colour reproduction characteristics.3.4.1 DensitometryThe densities of all picture materials inte
38、nded for reproduction shall be measured using ISO standard diffuse status M transmission densitometry (according to ISO 5-2 and ISO 5-3). Densities of picture materials intended for viewing by projection shall be measured using ISO standard diffuse status A transmission densitometry.3.4.2 Density of
39、 the original camera negative LAD test image (LAD control patch)The densities of the LAD control patch (see A.2) shall be chosen to be representative of the centre of scene density range normally obtained on a modern (colour-masked) colour negative film with normal exposure and processing.3.4.3 Dens
40、ity of the LAD test image in master positiveThe LAD control patch should be printed to the centre of the usable straight-line portion of the duplicating film. These aim densities are specified by the film manufacturer for the particular duplicating stock.3.4.4 Density of the LAD test image in duplic
41、ate negativeThe LAD control patch should be printed according to the aim densities specified by the film manufacturer for the particular duplicating stock. These densities are normally near the centre of the usable straight-line portion of the characteristic curve, but may be different from those sp
42、ecified for the master positive in order to aid intercutability with original camera negatives and to facilitate high-speed printing.3.4.5 Density of the LAD test image in projection printThe LAD control patch should be printed to a neutral grey of 1,00 density (1,00 equivalent neutral density) on t
43、he print. The status A densities corresponding to a 1,00 neutral grey are specified by the film manufacturer, and will depend upon the dyes in the print film and the viewing illumination in accordance with ISO 2910.3.5 Leaders for picture materials3.5.1 Head and tail leaders for picture materials sh
44、all be in accordance with ISO 4241.3.5.2 A synchronizing mark, clearly identified as “Head Sync”, shall be placed on the “Picture Gate” frame (frame 192) of the head leader.3.5.3 The test image referred to in 3.4 shall be located in or before the head leader in a position which ensures that the prin
45、ting machine has reached full and steady speed when the test image is exposed. It is recommended that the test image replaces from one to six of the head leader frames 97 to 1023.5.4 Additional requirements for head and tail leaders are subject to agreement between the parties involved. ISO 2016 All
46、 rights reserved 3BS ISO 12612:2016ISO 12612:2016(E)4 Requirements for post-production sound elements4.1 Cutting and perforating dimensionsCutting and perforating dimensions for 35 mm magnetic recording films shall be in accordance with ISO 491 (Type P perforation and 4,75 mm perforation pitch).The
47、use of 17,5 mm magnetic film is permissible only by prior agreement between all parties involved.4.2 Position, dimensions and track assignmentsPosition, dimensions and track assignments of sound tracks shall be in accordance with ISO 162 for 35 mm magnetic film and ISO 9525 for 17,5 mm magnetic film
48、.4.3 Nominal velocityThe nominal velocity of 35 mm magnetic sound records shall be in agreement with the intended projection frame rate of the accompanying picture, normally 24 frames per second which is equivalent to 96 perforation holes per second or approximately 45,6 cm/s.4.4 RecordingsRecording
49、s shall be made on magnetic film containing no splices. No more than two editorial splices shall be allowed in any roll of magnetic film.4.5 Sound records to be interchanged for making monophonic release prints (see A.3)By agreement between the parties involved, sound records shall be recorded using the following: a one-track standard on separate magnetic film; a three-track or four-track standard on a single magnetic film.4.5.1 Three sound records shall be recorded on a single three-track mag
