ISO 7343:1993
(Main)Cinematography - Two-track photographic sound records on 35 mm motion-picture prints - Positions and width dimensions
Cinematography - Two-track photographic sound records on 35 mm motion-picture prints - Positions and width dimensions
Specifies positions and dimensions, sound records, picture-sound displacement, and track usage.
Cinématographie — Enregistrement de deux pistes sonores optiques sur copies d'exploitation cinématographiques 35 mm — Positions et dimensions en largeur
General Information
- Status
- Published
- Publication Date
- 05-May-1993
- Technical Committee
- ISO/TC 36 - Cinematography
- Drafting Committee
- ISO/TC 36/WG 3 - Audio technology
- Current Stage
- 9060 - Close of review
- Completion Date
- 04-Mar-2029
Relations
- Effective Date
- 15-Apr-2008
Overview
ISO 7343:1993 specifies the positions and width dimensions for two-track photographic (optical) sound records on 35 mm motion-picture release prints. It defines how the two variable-area sound tracks are located laterally on the film, how they are scanned in reproducers, and basic requirements for septa and picture–sound displacement. The standard is a technical revision of the 1983 edition and works in conjunction with ISO 2939 for picture area and other sound-recording requirements.
Key topics and requirements
- Track layout and alignment
- Two variable-area sound tracks are placed laterally on the 35 mm print; channel 2 is recorded nearest the outer edge of the film.
- Channel slit images for recording and reproduction must be in line at 90° ± 5′ to the film reference edge.
- Dimensions and positions
- The standard provides a table (Table 1) of defined lateral reference positions and widths (given in millimetres and inches) for markers labelled A–G to ensure correct spacing and compatibility between prints and reproducers.
- Septum and reproduction
- The septum between channel records shall be effectively opaque on prints to prevent cross-talk; lighter septa from certain print processes (e.g., direct positive on reversal stock) are allowable and not grounds for rejection.
- Picture–sound displacement
- The permissible picture–sound displacement follows the specifications in ISO 2939 (referenced normative standard).
- Track usage
- The two tracks may carry stereophonic-related program material or separate independent material (for example, two languages).
- For two-channel stereophonic programs, common practice is amplitude–phase matrix encoding (track 1 = left total, track 2 = right total).
- Interoperability note
- Projector and reproducer manufacturers may minimize guard bands between scanned areas to maintain compatibility with single-channel records made per ISO 2939.
Applications and users
ISO 7343 is used by:
- Film laboratories and print manufacturers to lay out optical sound tracks correctly on 35 mm release prints.
- Projector and sound-reproducer manufacturers to design scanning and photo-sensitive devices that align with standard track positions and widths.
- Film archivists, restoration engineers, and cinema sound technicians to verify print conformity and ensure accurate playback.
- Cinema and standards bodies that need interoperability across prints, reproducers, and distribution chains.
Related standards
- ISO 2939:1986 - Cinematography: picture image area and photographic sound record on 35 mm motion-picture release prints (referenced for picture–sound displacement and related requirements).
Keywords: ISO 7343, two-track photographic sound, 35 mm motion-picture prints, sound track positions, sound track dimensions, cinematography standard, optical sound tracks.
Frequently Asked Questions
ISO 7343:1993 is a standard published by the International Organization for Standardization (ISO). Its full title is "Cinematography - Two-track photographic sound records on 35 mm motion-picture prints - Positions and width dimensions". This standard covers: Specifies positions and dimensions, sound records, picture-sound displacement, and track usage.
Specifies positions and dimensions, sound records, picture-sound displacement, and track usage.
ISO 7343:1993 is classified under the following ICS (International Classification for Standards) categories: 37.060.20 - Motion picture films. Cartridges. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 7343:1993 has the following relationships with other standards: It is inter standard links to ISO 7343:1983. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase ISO 7343:1993 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of ISO standards.
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 7343
Second edition
1993-05-15
Cinematography - Two-track
photographic Sound records on 35 mm
motion-picture prints - Positions and
width dimensions
- Enregistrement de deux pistes sonores optiques sur
Cinbma tographie
copies d’exploita tion cin6ma tographiques 35 mm - Positions et
dimensions en largeur
Reference number
.
,
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. Esch 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 closely with the International Electrotechnical Commission
(1 EC) 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 least 75 % of the member bodies casting
a vote.
International Standard ISO 7343 was prepared by Technical Committee
ISO/TC 36, Cinematography.
This second edition cancels and replaces the first edition
(ISO 7343:1983), of which it constitutes a technical revision.
0 ISO 1993
All rights reserved. No part of this publication may be reproduced or utilized in any form or
by any means, electronie or mechanical, including photocopying and microfilm, without per-
mission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-l 211 Geneve 20 l Switzerland
Printed in Switzerland
ii
INTERNATIONAL STANDARD ISO 7343:1993(E)
- Two-track photographic Sound
Cinematography
records on 35 mm motion-picture prints - Positions
and width dimensions
3 Positions and dimensions
1 Scope
The positions and dimensions of the two Sound rec-
1.1 This International Standard specifies the lateral
ords shall be as shown in figure 1 and given in
positions and width dimensions of two-track variable
table 1. In all other respects, the Sound records shall
area Sound records on 35 mm motion-picture prints.
comply with the requirements of ISO 2939.
1.2 This International Standard specifies the area
4 Sound records
scanned in the Sound reproducer.
’ 4.1 Channel 1 and channel 2 recording and repro-
ducing slit images shall be positioned in line at an an-
2 Normative reference
gle of 90’ + 5’ to the reference edge of the film.
The following Standard contains provisions which,
4.2 Channel 2 shall be recorded in the record near-
through reference in this text, constitute provisions
est the outer edge of the film, as shown in figure 1.
of this International Standard. At the time of publi-
cation, the edition indicated was valid. All Standards
4.3 The Sept
...
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