BS 5550-5 4 1-1986 Cinematography - Common to more than one gauge - Sound - Code of Practice for the identification of systems for synchronization of unperforated audio tape with m.pdf

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1、BRITISH STANDARD BS 5550-5.4.1: 1986 Cinematography Part 5: Common to more than one gauge Section 5.4 Sound Subsection 5.4.1 Code of practice for the identification of systems for synchronization of unperforated audio tape with motion-picture film and videotape UDC 778.534.425:778.534.48BS5550-5.4.1

2、:1986 This British Standard, having been prepared under the directionof the Cinematography and Photography Standards Committee, was published underthe authority of the BoardofBSI and comes into effecton 31December1986 BSI 10-1999 First published October 1978 First revision December 1986 The followin

3、g BSI references relate to the work on this standard: Committee reference CPM/5 Draft for comment 85/35608 DC ISBN 0 580 15545 5 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Cinematography and Photography Standards Committee (CPM/-) t

4、o Technical Committee CPM/5, upon which the following bodies were represented: Association of Cinematograph, Television and Allied Technicians Association of Independent Cinemas British Broadcasting Corporation British Film and Television Producers Association British Film Institute British Kinemato

5、graph, Sound and Television Society Cinematograph Exhibitors Association of Great Britain and Ireland Independent Television Companies Association Institute of Amateur Cinematographers Royal Photographic Society Amendments issued since publication Amd. No. Date of issue CommentsBS5550-5.4.1:1986 BSI

6、 10-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Characteristics of synchronization systems 1 Table 1 Synchronization systems 2 Publication referred to Inside back coverBS5550-5.4.1:1986 ii BSI 10-1999 Foreword This revision of BS5550-5.4.1 has been prepared

7、 under the direction of the Cinematographic and Photographic Standards Committee. The standard has been revised to include all current systems of pulse and time code synchronization as used in the film and television industries. It supersedes BS5550-5.4.1:1978 which is withdrawn. A British Standard

8、does not purport to include all the necessary provisions of a contract. Users of British Standards are 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 i

9、nside front cover, pagesi andii, pages1 and2, an inside back cover and a back cover. 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.BS5550-5.4.1:1986 BSI 10-1999 1 1 Scope This Subs

10、ection of BS5550 identifies the various systems of pulse and time code synchronization for unperforated magnetic audio tape as specified in BS6288-1, currently used in conjunction with motion-picture and videotape recordings. NOTEThe title of the publication referred to in this standard is given on

11、the inside back cover. 2 Characteristics of synchronization systems 2.1 The dimensional features of synchronization systems likely to be encountered are shown in Table 1. 2.2 Both the time base frequency and a description of the synchronizing signal should be stated, together with a reference to the

12、 picture frame rate frequency (in frames per second) (e.g.50Hz Neo Pilotton referred to25 frames per second). 2.3 If integrated audio and time code heads with in-line gaps cannot be used for crosstalk reasons and separate code heads have to be used, the resulting time difference on tape between the

13、audio and the time code recordings should be compensated electronically within the recorder itself. Any off-set in time between the audio and the time code recordings should be stated on the spool or container. 2.4 The recommended speed for6.25mm tape is19.05cm/s, although38.1cm/s is acceptable. The

14、 recommended speed for3.81mm tape is9.52cm/s, although other speeds may also be used. 2.5 The recording should be made in such a manner that, on reproduction, the tape moves from left to right with the magnetic coating away from the observer. The positions of the audio records and the pulse and time

15、 code records are given inTable 1. 2.6 In multitrack records the synchronizing signal should be located on the higher track number.BS5550-5.4.1:1986 2 BSI 10-1999 Table 1 Synchronization systems System Diagrammatic representation of the system Sync. signal data Telefunken (stereo) 10 kHz carrier FM

16、by 50 Hz or60 Hz NAGRA SN 10 Hz or 25 Hz or 30 Hz from crystal generator NAGRA (stereo) 13.5 kHz carrier FM by 50 Hz or60 Hz Synchrotone 50 Hz or 60 Hz Neo Pilotton 50 Hz or 60 Hz push-pull EBU format SMPTE/EBU timecode NAB format SMPTE/EBU timecode Key 1. Audio heads indicated thus 2. Synchronizing

17、 heads indicated thus All dimensions are in millimetres.BS5550-5.4.1:1986 BSI 10-1999 Publication referred to BS 6288, Magnetic tape sound recording and reproducing systems. BS 6288-1, Specification for general conditions and requirements. BS 5550-5.4.1: 1986 BSI 389 Chiswick High Road London W4 4AL

18、 BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions BritishStandards are updated by amendment or revision. Users

19、of BritishStandards 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 BritishStandard would inform the Secretary o

20、f the technical committee responsible, the identity of which can be found on the inside front cover. Tel:02089969000. Fax:02089967400. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards. Buying standards

21、 Orders for all BSI, international and foreign standards publications should be addressed to Customer Services. Tel:02089969001. Fax:02089967001. In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as BritishStandards

22、, unless otherwise requested. Information on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service. Various BSI electronic information services are also available which give details on all

23、its products and services. Contact the Information Centre. Tel:02089967111. Fax:02089967048. Subscribing 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 Adm

24、inistration. Tel:02089967002. Fax:02089967001. Copyright Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international standardization bodies. Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be repro

25、duced, 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 implementing the standard, of necessary details such as symbols, and size,

26、type or grade designations. If these details are to be used for any other purpose than implementation then the prior written permission of BSI must be obtained. If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel:02089967070.

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