1、BRITISH STANDARD BS ISO 7343:1993 Implementation of ISO 7343:1993 Cinematography Two-track photographic sound records on 35 mm motion-picture prints Positions and width dimensions UDC 778.534.452:771.531.351BSISO7343:1993 This British Standard, having been prepared under the directionof the Consumer
2、 Products and Services Sector Board, was published under theauthority of the StandardsBoard and comes intoeffect on 15 October 1995 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference CPW/36 Draft for comment 92/38208 DC ISBN 0 580 24843 7 Committees res
3、ponsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee CPW/36, Cinematography International coordination, upon which the following bodies were represented: British Kinematograph, Sound and Television Society British Photographic Association I
4、TV Association (Itva) The following bodies were also represented in the drafting of the standard, through subcommittees and panels: Association of Independent Cinemas British Broadcasting Corporation British Film and Television Producers Association British Film Institute Broadcasting Entertainment
5、Cinematograph and Theatre Union Institute of Amateur Cinematographers Royal Photographic Society Amendments issued since publication Amd. No. Date CommentsBSISO7343:1993 BSI 11-1999 i Contents Page Committees responsible Inside front cover National foreword ii Foreword iii Text of ISO 7343 1BSISO734
6、3:1993 ii BSI 11-1999 National foreword This British Standard reproduces verbatim ISO7343:1993 and implements it as the UK national standard. It supersedes BS5550-3.4.7:1984, which is withdrawn. This British Standard is published under the direction of the Consumer Products and Services Sector Board
7、 whose Technical Committee CPW/36 has the responsibility to: aid enquirers to understand the text; present to the responsible international committee any enquiries on interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and
8、promulgate them in the UK. NOTEInternational and European Standards, as well as overseas standards, are available from Customer Services, BSI,389Chiswick High Road, London W44AL. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are
9、 responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the ISO title page, pages ii to iv, pages 1and 2 and a back cover.
10、This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.ISO7343:1993(E) ii BSI 11-1999 Contents Page Foreword iii 1 Scope 1 2 Normative reference 1 3 Positions and dimensions 1 4 Sound recor
11、ds 1 5 Picture-sound displacement 1 6 Track usage 1 Figure 1 Two photographic sound tracks on 35 mm motion-picture prints 2 Table 1 Dimensions 1 Descriptors: Cinematography, motion-picture film, motion-picture film 35 mm, sound recording, sound track, specifications, position (location) dimensions,
12、width.ISO7343:1993(E) BSI 11-1999 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 technical committees. Each member body
13、 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 closely with the International Electrotec
14、hnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least75% of the member bodies casting a vote.
15、 International Standard ISO7343 was prepared by Technical Committee ISO/TC36, Cinematography. This second edition cancels and replaces the first edition (ISO7343:1983), of which it constitutes a technical revision.iv blankISO7343:1993(E) BSI 11-1999 1 1 Scope 1.1 This International Standard specifie
16、s the lateral positions and width dimensions of two-track variable area sound records on35mm motion-picture prints. 1.2 This International Standard specifies the area scanned in the sound reproducer. 2 Normative reference The following standard contains provisions which, through reference in this te
17、xt, constitute provisions of this International Standard. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editi
18、on of the standard indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 2939:1986, Cinematography Picture image area and photographic sound record on 35 mm motion-picture release prints Position and dimensions. 3 Positions and dimensions The posi
19、tions and dimensions of the two sound records shall be as shown inFigure 1 and given inTable 1. In all other respects, the sound records shall comply with the requirements of ISO2939. 4 Sound records 4.1 Channel1and channel2recording and reproducing slit images shall be positioned in line at an angl
20、e of90 5 to the reference edge of the film. 4.2 Channel2shall be recorded in the record nearest the outer edge of the film, as shown inFigure 1. 4.3 The septum between channel records shall be effectively opaque on prints. A lighter septum resulting from direct positive recordings being printed on r
21、eversal print materials shall not be cause for rejection of prints. 5 Picture-sound displacement The picture-sound displacement shall be as specified in ISO2939. Table 1 Dimensions 6 Track usage The two tracks specified in this International Standard may be used for either stereophonically related p
22、rogram material or separate, unrelated material such as two languages. When used for two-channel stereophonic program material, it is common practice to employ an amplitude-phase matrix encoding wherein track1 is used for the left total signal and track2 for the right total signal. A left-only signa
23、l will then nominally modulate only track1 and be presented over the left screen loudspeaker and a right-only signal will only modulate track2 and be presented over the right screen loudspeaker. NOTE 1The container and leader of the print having two sound records should be labelled with the above in
24、formation. NOTE 2Dimensions B and C were chosen to ensure separation of the channel1 and channel2signals upon reproduction. Projector manufacturers will probably want to reduce the guard band on the photo-sensitive device between the channel1 and channel2 scanned areas as much as possible so that th
25、e projector will be fully compatible with sound records bearing a single channel and made in accordance with ISO2939. Dimension mm in A ref. 5,20 0,205 B 6,04 0,05 0,238 0,002 C 6,30 0,05 0,248 0,002 D ref. 7,14 0,281 E ref. 6,18 0,03 0,243 0,001 F ref. 2,13 0,084 G max. 0,05 0,002ISO7343:1993(E) 2
26、BSI 11-1999 NOTEThe area scanned by the reproducer represents the area illuminated by the scanning beam and the effective active area of the photo-sensitive device. Figure 1 Two photographic sound tracks on 35 mm motion-picture printsblankBS ISO 7343:1993 BSI 389 Chiswick High Road London W4 4AL BSI
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