1、BRITISH STANDARD BS 5550-9.4.1: 1989 ISO 9525:1988 Cinematography Part 9: 17.5 mm film Section 9.4 Sound Subsection 9.4.1 Specification for the positions and width dimensions of recording head gaps for two sound records on 17.5 mm magnetic film UDC 778.534.5:534.852:681.84 (083.3)BS5550-9.4.1:1989 T
2、his British Standard, having been prepared under the directionof the Cinematographyand PhotographyStandards PolicyCommittee, was publishedunder the authority ofthe Board of BSI and comes intoeffect on 30November1989 BSI 10-1999 The following BSI references relate to the work on this standard: Commit
3、tee reference CPM/5 Draft for comment 87/41369 DC ISBN 0 580 17674 6 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Cinematography and Photography Standards Policy Committee (CPM/-) to Technical Committee CPM/5, upon which the following
4、 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 Kinematograph, Sound and Television Society Cinematograph Exhi
5、bitors Association of Great Britain and Northern Ireland ITV Association Institute of Amateur Cinematographers Royal Photographic Society Amendments issued since publication Amd. No. Date of issue CommentsBS5550-9.4.1:1989 BSI 10-1999 i Contents Page Committees responsible Inside front cover Nationa
6、l foreword ii 1 Scope 1 2 Normative reference 1 3 Location and width of magnetic head gaps 1 4 Recorded characteristic 1 5 Velocity 1 6 Track usage 1 Figure 1 Audio records on 17,5 mm magnetic film 2 Table 1 Dimensions 2BS5550-9.4.1:1989 ii BSI 10-1999 National foreword This Subsection of BS5550 has
7、 been prepared under the direction of the Cinematography and Photography Standards Policy Committee. It is identical with ISO9525:1988 “Cinematography Recording head gaps for two sound records on17,5mm magnetic film Positions and width dimensions”, published by the International Organization for Sta
8、ndardization (ISO). A British Standard 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. Cross-reference Inter
9、national Standard Corresponding British Standard ISO 1189:1986 BS 5550: Cinematography Subsection 3.4.2:1978 Specification for recorded characteristics for magnetic sound records on35mm motion-picture film (Technically equivalent) Summary of pages This document comprises a front cover, an inside fro
10、nt cover, pages i and ii, pages1 and 2 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.BS5550-9.4.1:1989 BSI 10-1999 1 1 Scope This International Standard specifies
11、 the lateral positions and width dimensions of the recording heads for two magnetic sound records and a control track on17,5mm single perforated magnetic recording film. It also specifies the reproducing velocity of the film travel. 2 Normative reference The following standard contains provisions wh
12、ich, through reference in this text, 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
13、of applying the most recent edition of the standard listed below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 1189:1986, Cinematography Recorded characteristic for magnetic sound records on35mm motion-picture film excluding striped release prints Specifi
14、cations. 3 Location and width of magnetic head gaps 3.1 The width dimensions and lateral positions of the magnetic head gaps shall be as shown onFigure 1 and given inTable 1. 3.2 The magnetic head gaps shall be physically in line at an angle of90 3 to the direction of the film travel. 4 Recorded cha
15、racteristic The recorded characteristic shall be in accordance with ISO1189. 5 Velocity 5.1 The sound records are intended for use at velocities of24 frames (approximately45,6cm or18in) per second, or at25 frames (approximately47,5cm or18,7in) per second. 5.2 The tolerances given in ISO1189 permit a
16、 choice of operating conditions such that the recorded characteristic conforms to ISO1189 even though the recording is intended for either24 or25 frames per second, and the reproduction is conducted at the other velocity. 6 Track usage 6.1 The two tracks specified in this International Standard may
17、be used for either related or unrelated material. 6.2 When used for two-channel stereophonic programme material, track1 shall be used for the left (as viewed from the auditorium) loudspeaker channel. Track2 shall be used for the right (as viewed from the auditorium) loudspeaker channel. 6.3 The cont
18、rol track shall be used for recording other information and for address systems in analogue or digital form. NOTEIt is recommended that the container and leader of material having two sound records be labelled to indicate the nature of each recording and, if applicable, the nature of the information
19、 recorded on the control track.BS5550-9.4.1:1989 2 BSI 10-1999 Table 1 Dimensions Figure 1 Audio records on17,5mm magnetic film Dimension mm in l 1 (ref) 17,49 0,689 l 2 14,05 0,05 0,553 0,002 l 3 8,10 0,05 0,319 0,002 l 4 0,60 0,05 0,024 0,002 l 5 4,00 0,157 l 6 0,70 0,028 0 0,1 0 0,004 0 0,1 0 0,0
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