《BS-ISO-12611-2004.pdf》由会员分享，可在线阅读，更多相关《BS-ISO-12611-2004.pdf（10页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD BS ISO 12611:2004 Cinematography Audio head tones for use in international exchange of 35 mm analogue magnetic film masters Specifications and location ICS 37.060.20 ? Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:26:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 1
2、2611:2004 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 June 2004 BSI 28 June 2004 ISBN 0 580 43991 7 National foreword This British Standard reproduces verbatim ISO 12611:2004 and implements it as the UK national standard. It supersedes
3、 BS ISO 12611:1997 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee CPW/36, Cinematography, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British
4、 Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publi
5、cation does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible internation
6、al/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title
7、page, pages ii and iii, a blank page, pages 1 to 3 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:26:46 GMT+00:00 20
8、06, Uncontrolled Copy, (c) BSI Reference number ISO 12611:2004(E) OSI 4002 INTERNATIONAL STANDARD ISO 12611 Second edition 2004-06-01 Cinematography Audio head tones for use in international exchange of 35 mm analogue magnetic film masters Specifications and location Cinmatographie Audio head tones
9、pour utilisation dans les changes internationaux de masters de film magntique analogiques de 35 mm Spcifications et emplacement BS ISO 12611:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:26:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI IS:11621 O4002(E) DPlcsid Fremia ihTs PDF file
10、may ctnoian emdebt dedyfepcaes. In ccaocnadrw eith Aebods licensilop gnic,y this file mairp eb ynted iv roweb detu slahl ton ide ebtlnu deess the typefaces whice era hml era deddebicsnede to i dnanstlaled t noeh computfrep reormign tide ehtin.g In wodlnidaot gnhis file, trapise atpecc tiereht nser e
11、hnopsiiblity fo not infriigngn Aebods licensilop gnic.y ehT ISO tneClar Secrteiraat caceptl on siibality in this .aera Ai ebods a tredamafo kr Aebod SystemI sncotaropr.de teDails fo teh softwacudorp erts sut deo crtaee this PDF file cna f ebi dnuon tlareneG eh Info leratit evo the file; tP ehDc-Frta
12、eion marapterew setpo erimizde for irpnti.gn Evyre caer neeb sah taken to sneeru that the file is suitlbae fosu re yb ISO memdob rebeis. In tlnu ehikletneve y ttah lborp aem leratit gno it is f,dnuo plsaee inform ttneC ehlar Secrteiraat ta the serddaig sleb nevwo. ISO 4002 All irthgs erse.devr lnUet
13、o sswrehise specified, on trap fo this lbupictaion maeb y cudorperro de tuilizi den yna form ro na ybm ynae,s lecetrinoc ro mecinahcal, inclidung tohpcoiypodna gn micrfoilm, wittuoh repmissii non writign from ietI rehSa Ot tsserdda eh ebolw or ISOs memreb i ydobn the cnuotrfo y ttseuqer ehe.r ISO ci
14、rypothg fofice saCe tsopale 65 eneG 1121-HC 02 av leT. 4 + 10 947 22 1 11 xaF0 947 22 14 + 9 74 E-mail coirypthgiso.o gr We bwww.is.o gro Pulbisdehi n Switlrez dna ii ISO 4002 Allr ithgsr esedevr BS ISO 12611:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:26:46 GMT+00:00 2006, Uncont
15、rolled Copy, (c) BSI IS:11621 O4002(E) I SO 4002 All irthgs ersedevr iii Foreword ISO (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 tec
16、hnical committees. Each member body interested in a subject for which a technical committee 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 closel
17、y with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft
18、International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this documen
19、t may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 12611 was prepared by Technical Committee ISO/TC 36, Cinematography. This second edition cancels and replaces the first edition (ISO 12611:1997), of which it constitutes a mino
20、r revision. BS ISO 12611:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:26:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI blank 4002:11621 OSI SB Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:26:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTENRATIONAL TSANDADR IS:11621
21、O4002(E) I SO 4002 All irthgs ersedevr 1 Cinematography Audio head tones for use in international exchange of 35 mm analogue magnetic film masters Specifications and location 1 Scope This International Standard specifies head-leader tones for use on interchanged motion-picture analogue audio masters
22、, from two track (on three-track format records) through six track. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced doc
23、ument (including any amendments) applies. ISO 266:1997, Acoustics Preferred frequencies ISO 4834:1997, Cinematography Magnetic sound test films excluding striped release prints Basic technical characteristics AES7-2000, AES standard for the presevation and restoration of audio recording Method of me
24、asuring recorded fluxivity of magnetic sound records at medium wavelengths 1) DIN 45520:1973, Magnetic tape recorders; measurement of the absolute level of the magnetic flux and its frequency response on magnetic tapes 3 Leader 3.1 The first test section of leader shall be a 1 kHz sine wave signal r
25、ecorded at a flux of 185 nWb/m as measured according to AES7. The tone shall be recorded simultaneously and in phase on all channels of the master, for a duration of 10 s for two-channel masters on three-track format records, 20 s for three- and four- track masters, and 30 s for six-track masters. N
26、OTE The reference level of 185 nWb/m does not preclude the use of calibration films made according to DIN 45520 from being used for the alignment of recorders and reproducers. 3.2 For two-channel masters recorded on the three-track format only, the second section of leader shall identify the channel
27、s audibly by sequencing, in time, one beep on the left channel and two beeps on the right channel. 1) Revision of AES7-1982. Published by Audio Engineering Society, Inc. BS ISO 12611:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:26:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI IS:11
28、621 O4002(E) 2 I SO 4002 All irthgs ersedevr 3.3 The third section of leader shall be pink-noise recorded simultaneously and in phase on all the channels of the master for a duration of 30 s. The recorded level shall be such as to prevent saturation effects, such as 10 dB at a reference level of 185
29、 nWb/m. The level in each one-third octave band from 40 Hz to 16 kHz shall be the same, within the limits given in ISO 266. NOTE The objective of using a pink-noise test signal for this section is to have a reference signal with equal energy in equal logarithmic frequency intervals within the audio
30、bandwidth. 3.4 If companding noise reduction systems are in use, the fourth section of leader shall be the test signal generated by the noise reduction system for its reference level, for a duration of 10 s for two-channel masters on three-track format, 20 s for three- and four-track masters, and 30
31、 s for six-track masters. NOTE Such signals generally have audible identifying characteristics to identify the type of noise reduction. 3.5 Head-leader tones shall be recorded on each roll of audio masters, and written information on track location shall be printed on the outside of each container.
32、BS ISO 12611:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:26:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI IS:11621 O4002(E) I SO 4002 All irthgs ersedevr 3 Annex A (informative) Use of the test signals A.1 Purpose The purpose of this annex is to describe the usage of test signals
33、which are specified in this International Standard, as well as practical limitations to their usage. A.2 Uses of the reference level tone Subclauses A.2.1 and A.2.2 detail adjustments which are interactive and which may have to be performed more than once to optimize the various adjustments. A.2.1 T
34、he reference level tone may be used for setting the preliminary head-mounting adjustments such as coarse rotation, azimuth, zenith and height by setting the appropriate mechanical adjustments for the highest and most level-stable output. A.2.2 An X-Y display of the reference tone on an oscilloscope
35、may be used for coarse azimuth setting using the following method. Connect the X and Y inputs of an oscilloscope to the signals from the preamplifier outputs of the two channels corresponding to the two tracks in use which are physically most widely separated on the format being used. With the sensi
36、tivity of the preamplifier channels set to play the reference tone at the oscilloscope connection point at equal voltages, and the sensitivity of the X and Y oscilloscope channels made equal, adjust the azimuth for a 45 diagonal line on the oscilloscope, not an ellipse. A.2.3 The reference level ton
37、e may also be used as a relative channel polarity test by using an X-Y display to check that each of the preamplifier outputs corresponding to the records, compared to a reference channel output, have the same slope, not the opposite slope, which would indicate a polarity reversal in the head or pre
38、amplifier wiring. A.3 Uses of pink noise A.3.1 The pink noise can be used to obtain the best overall azimuth by observing a Lissajous pattern on an oscilloscope with the X and Y axes connected to the signals from the two channels: when the reproducer sensitivity and equalization have been set for eq
39、ual performance in the channels, and the azimuth is correct, a line will be displayed at a 45 angle, not a fuzzy ellipse. Pink noise has an advantage over sine wave tones for azimuth adjustment, as it produces unambiguous results (i.e. cannot be misajusted by one full cycle). A.3.2 In addition, pink
40、 noise can be used with a constant-percentage-bandwidth spectrum analyser, such as a one-third-octave band analyser, to set equalization adjustments. BS ISO 12611:2004 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:26:46 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 12611:2004 BSI 389
41、 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are up
42、dated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this Briti
43、sh Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: +44 (0)20 8996 9000. Fax: +44 (0)20 8996 7400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically
44、receive the latest editions of standards. Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel: +44 (0)20 8996 9001. Fax: +44 (0)20 8996 7001. Email: ordersbsi-. Standards are also available from the BSI website at http:/
45、www.bsi-. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested. Information on standards BSI provides a wide range of information on national, European and international
46、 standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all its products and services. Contact the Information Centre. Tel: +44 (0)20 8996 7111. Fax: +44 (0)20 8996 7048. Email: infobsi-. Subscri
47、bing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards. For details of these and other benefits contact Membership Administration. Tel: +44 (0)20 8996 7002. Fax: +44 (0)20 8996 7001. Email: membershipbsi-. Information
48、regarding online access to British Standards via British Standards Online can be found at http:/www.bsi- Further information about BSI is available on the BSI website at http:/www.bsi-. Copyright Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications
49、 of the international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means electronic, photocopying, recording or otherwise without prior written permission from BSI. This does not preclude the free use, in the course of implementi