1、INTERNATIONAL STANDARD ISO 7343 Second edition 1993-05-15 Cinematography - Two-track photographic Sound records on 35 mm motion-picture prints - Positions and width dimensions Cinbma tographie - Enregistrement de deux pistes sonores optiques sur copies dexploita tion cin6ma tographiques 35 mm - Posi
2、tions et dimensions en largeur Reference number ISO 7343:1993(E) ISO 7343:1993(E) . , 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 th
3、rough 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 collab
4、orates 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
5、 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.
6、 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 Switzerlan
7、d Printed in Switzerland ii INTERNATIONAL STANDARD ISO 7343:1993(E) Cinematography - Two-track photographic Sound records on 35 mm motion-picture prints - Positions and width dimensions 1 Scope 3 Positions and dimensions 1.1 This International Standard specifies the lateral positions and width dimen
8、sions of two-track variable area Sound records on 35 mm 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 text, constitute provisions of this Int
9、ernational Standard. At the time of publi- cation, 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 re- cent edition of the Standard indicated belo
10、w. Mem- bers 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 dimen- sions. The positions and dimensions of the two Sound rec- ords shal
11、l be as shown in figure 1 and given in table 1. In all other respects, the Sound records shall comply with the requirements of ISO 2939. 4 Sound records 4.1 Channel 1 and channel 2 recording and repro- ducing slit images shall be positioned in line at an an- gle of 90 + 5 to the reference edge of th
12、e film. 4.2 Channel 2 shall be recorded in the record near- est the outer edge of the film, as shown in figure 1. 4.3 The Septum between channel records shall be effectively opaque on prints. A lighter Septum resulting from direct positive re- cordings being printed on reversal print materials shall
13、 not be Cause for rejection of prints. 5 Picture-Sound displacement The picture-Sound displacement shall be as specified in ISO 2939. Table 1 - Dimensions Dimension mm A ref. B C D ref. E ref. F ref. G max. 5,20 6,04 * 0,05 6,30 f 0,05 7,14 6,18 f 0,03 2,13 0,05 in 0,205 0,238 & 0,002 0,248 f 0,002
14、0,281 0,243 f 0,001 0,084 0,002 6 Track usage The two tracks specified in this International Standard may be used for either stereophonically related pro- gram material or separate, unrelated material such as two languages. When used for two-channel stereophonic program material, it is common practi
15、ce to employ an amplitude-Phase matrix encoding wherein track 1 is used for the left total Signal and track 2 for the right total Signal. A left-only Signal will then nominally modulate only track 1 and be presented over the left modulate track 2 and be presented over the right Screen loudspeaker. N
16、OTES 1 The Container and leader of the print having two Sound records should be labelled with the above information. 2 Dimensions B and C were Chosen to ensure Separation of the channel 1 and channel 2 Signals upon reproduction. Projector manufacturers will probably want to reduce the guard band on
17、the photosensitive device between the channel 1 and channel2 scanned areas as much as possible so that the projector will be fully compatible with Sound records bearing a Single channel and made in accordance Screen loudspeaker and a right-only Signal will only with ISO 2939. Track 1 (Left total) Tr
18、ack 2 (Right total) Note 1 Direction of film travet *_ Ref erence edge , NOTE - The 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 prints
19、 2 This page intentionaliy lefi blank This page intentionally lef? blank This page intentionally lefi blank ISO 7343:1993(E) UDC 778.534.452:771.531.351 Descriptors: cinematography, (location), dimensions, width. motion-picture film, motion-picture film 35 mm, Sound recording, Sound track, specifications, Position Price based on 2 pages
