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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS ISO 6025:2000 ICS 37.0
2、60.20 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Cinematography Analogue photographic sound test films, 35 mm and 16 mm Specifications Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:11:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI This British Standard, having
3、been prepared under the direction of the Consumer Products and Services Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 April 2001 BSI 04-2001 ISBN 0 580 37289 8 BS ISO 6025:2000 Amendments issued since publication Amd. No.DateComments Natio
4、nal foreword This British Standard reproduces verbatim ISO 6025:2000 and implements it as the UK national standard. It supersedes BS ISO 6025:1993 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee CPW/36, Cinematography, which has the responsibility to:
5、 aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organi
6、zations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled International Standards
7、 Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. 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
8、 not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to iv, pages 1 to 11 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. L
9、icensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:11:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Reference number ISO 6025:2000(E) INTERNATIONAL STANDARD ISO 6025 Third edition 2000-11-01 Cinematography Analogue photographic sound test films, 35 mm and 16 mm Specifications Cinmatographie Fi
10、lms pour les essais denregistrement sonore photographique analogue, 35 mm et 16 mm Spcifications Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:11:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 6025:2000(E) ii Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:11:52 GMT+00:00 20
11、06, Uncontrolled Copy, (c) BSI ISO 6025:2000(E) iii ContentsPage Foreword.iv 1Scope 1 2Normative references1 3Specifications common to all types of photographic sound test films.2 4Test films for checking and adjusting sound focus and azimuth 2 5Test films for checking and adjusting the lateral posi
12、tion of the film in relation to the scanning beam (buzz track).2 6Test films for checking and adjusting uniformity of the scanning beam illumination (snake track) .4 7Variable area modulated test films for checking and adjusting sound level 6 8Test films for checking and adjusting frequency response
13、7 9Test films for measuring non-uniformity of film velocity of movement (flutter).8 Annex A (informative) Azimuth tolerance.9 Annex B (informative) Calculation of photoelectric output factor .10 Bibliography11 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:11:52 GMT+00:00 2006, Uncontroll
14、ed Copy, (c) BSI ISO 6025:2000(E) iv 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
15、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 Electrotech
16、nical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publi
17、cation as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of patent rights. ISO shall not be held responsible for identifying any or all
18、 such patent rights. International Standard ISO 6025 was prepared by Technical Committee ISO/TC 36, Cinematography. This third edition cancels and replaces the second edition (ISO 6025:1993), clause 1 and Table 7 of which have been revised. Clause 2 has also been revised and a bibliography has been
19、added. Annexes A and B of this International Standard are for information only. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:11:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTERNATIONAL STANDARDISO 6025:2000(E) 1 Cinematography Analogue photographic sound test films, 35 mm and 16 mm S
20、pecifications 1Scope 1.1This International Standard specifies basic technical characteristics for the international exchange of analogue photographic sound test films intended for checking, adjusting and measuring motion-picture projector sound systems and sound reproducing channels of motion-pictur
21、e installations for monophonic or stereophonic reproduction. 1.2This International Standard specifies types and technical characteristics of test films made on 35 mm and 16 mm motion-picture films. 1.3This International Standard includes test films intended for the checking, adjusting and measuring
22、of a)focusing and azimuth of the scanning beam, b)scanning beam width and its position relative to the reference edge of the film, c)uniformity of the scanning beam illumination, d)level output balance of several motion-picture projectors, e)frequency response of the sound reproduction channel, and
23、f)non-uniformity of film travel. 2Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not a
24、pply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members o
25、f ISO and IEC maintain registers of currently valid International Standards. ISO 69:1998, Cinematography 16 mm motion-picture and magnetic film Cutting and perforating dimensions. ISO 491:1995, Cinematography 35 mm motion-picture film and magnetic film Cutting and perforating dimensions. ISO 4243:19
26、79, Cinematography Picture image area and photographic sound record on 16 mm motion-picture release prints Positions and dimensions. ISO 7343:1993, Cinematography Two-track photographic sound records on 35 mm motion-picture prints Positions and width dimensions. IEC 60386:1972, Method of measurement
27、 of speed fluctuations in sound recording and reproducing equipment. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:11:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 6025:2000(E) 2 3Specifications common to all types of photographic sound test films 3.1Test films shall be made on motio
28、n-picture raw stock films, the cutting and perforating dimensions of which shall be in accordance with ISO 491 for 35 mm film and ISO 69 for 16 mm film. 3.2The film stock should preferably be polyester base or low-shrinkage triacetate base. 3.3The location and width dimensions of sound records shall
29、 be in accordance with ISO 7343 for 35 mm film and ISO 4243 for 16 mm film. 3.4Test films shall be splice-free, except where joins are an essential part of the test film. 3.5Each film shall be intended primarily for use at 24 frames per second. All frequencies and velocity tolerances given in this I
30、nternational Standard refer to that velocity. A speed of 25 frames per second may be used. Other test films may be developed for use at other speeds, if the speeds are so stated. 4Test films for checking and adjusting sound focus and azimuth The characteristics of the test signal for checking and ad
31、justing sound focus and azimuth shall be as given in Table 1. Table 1 Test signal characteristic35 mm16 mm Frequency, kHz97,1 Frequency tolerance, %?3?3 Maximum output deviation, dB?0,3?0,5 Azimuth angle (relative to reference edge), degrees ()9090 Azimuth tolerance, minutes (?) a ?5?5 Minimum modul
32、ation as a percentage of maximum, %8080 Minimum duration of signal, s100100 a See annex A. 5Test films for checking and adjusting the lateral position of the film in relation to the scanning beam (buzz track) The characteristics of the test signal for checking and adjusting the lateral position of t
33、he film in relation to the scanning beam shall be as given in Table 2. Table 2 Test signal characteristicAll films Frequency on the picture image side, Hz300 Frequency on the opposite side, Hz1 000 Frequency tolerance, %?10 FormSquare wave Minimum duration of signal, s100 Licensed Copy: sheffieldun
34、sheffieldun, na, Sun Nov 26 13:11:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 6025:2000(E) 3 The signal location and width dimensions shall be as given in Table 3. Table 3 35 mm (see Figure 1) 16 mm (see Figure 2)Dimension mminmmin A 5,10?0,030,201?0,00113,58?0,030,535?0,001 B 7,23?0,030,285?0
35、,00115,39?0,030,606?0,001 C0,18 min.0,007 min.0,30 min.0,012 min. D0,30 min.0,012 min.0,18 min.0,007 min. a Reference edge Figure 1 35 mm buzz track Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:11:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 6025:2000(E) 4 a Reference edge Figure 2
36、 16 mm buzz track 6Test films for checking and adjusting uniformity of the scanning beam illumination (snake track) The characteristics of the test signal for checking and adjusting the uniformity of the scanning beam illumination shall be as given in Table 4. Table 4 Test signal characteristicAll f
37、ilms Frequency, Hz1 000 ModulationMaximum consistent with dimension C Maximum output deviation along the whole of the test film, dB?0,5 Duration of signal a, s 6 a The traverse of the snake track shall not be less than the duration of the signal. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 2
38、6 13:11:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 6025:2000(E) 5 The signal location and width dimensions shall be as given in Table 5. Table 5 35 mm (see figure 3) 16 mm (see figure 4)Dimension mminmmin A 5,20?0,030,205?0,00113,66?0,030,538?0,001 B 7,13?0,030,281?0,00115,31?0,030,603?0,001
39、C0,18 max.0,007 max.0,13 max.0,005 max. a Reference edge Figure 3 35 mm snake track a Reference edge Figure 4 16 mm snake track Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:11:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 6025:2000(E) 6 7Variable area modulated test films for checki
40、ng and adjusting sound level The characteristics of the test signal for checking and adjusting the sound level shall be as given in Table 6. Table 6 Test signal characteristic35 mm16 mm Frequency, Hz1 000400 Frequency tolerance, %?3?3 FormSinusoidalSinusoidal Maximum total harmonic distortion, %35 M
41、aximum output deviation, dB?0,5?0,5 Photoelectric output factor (for nominal 50 % modulation) a 0,3440,368 Minimum duration of signal, s6060 NOTEIf the track format is multilateral, care should be taken to ensure that the modulation in each element is equal. a The photoelectric output factors (POF)
42、given here are for 35 mm stereophonic films using a 0,254 mm (0,010 in) septum between tracks and a receptor with no dead area between tracks and for 16 mm monophonic films. The equivalent 35 mm monophonic modulation is 43,4 %. (See annex B for the calculation of POF.) Licensed Copy: sheffieldun she
43、ffieldun, na, Sun Nov 26 13:11:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 6025:2000(E) 7 8Test films for checking and adjusting frequency response The frequencies for test films for checking and adjusting the frequency response shall be as given in Table 7. Table 7 Frequencies35 mm16 mm Refer
44、ence frequency, Hz1 000400 Frequency series in order of their location in the test film, Hz31,5 4040 63 a 63 a 125 a 125 a 250250 500500 1 0001 000 2 0002 000 3 1503 150 4 0004 000 5 0005 000 6 3006 300 7 1007 100 8 0008 000 9 000 10 000 11 200 12 500 1 000400 Frequency tolerance?(3 % + 2 Hz)?(3 % +
45、 2 Hz) If a pink noise section is included on the test film, the pink noise shall be recorded in such a way that the level within a 1/3 octave band with the centre frequency equal to any of the frequencies given in the appropriate series in this table shall be within the tolerances set out in Table
46、8. a In countries where the power mains are operated at 60 Hz, the frequencies of 63 Hz and 125 Hz may be replaced by 50 Hz and 100 Hz to minimize the effects of narrow band noise. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 13:11:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 6025:200
47、0(E) 8 The characteristics of the test signal for checking and adjusting the frequency response tolerance shall be as given in Table 8. Table 8 Test signal characteristic35mm16 mm FormSinusoidalSinusoidal Modulation a, % 5050 Maximum output level deviation of the test film at any frequency, when com
48、pared with the average output at the reference frequency, dB ?0,5?1,0 Maximum output deviation within each frequency, dB?0,3?0,5 Maximum total harmonic distortion at any of the test film frequencies up to the given frequency 3 % up to 5 kHz5 % up to 3 kHz Azimuth tolerance, minutes (?)?5?5 Minimum d
49、uration of signal at reference frequency, s2020 Minimum duration of signal at all other frequencies, s88 a If the track format is multilateral, care should be taken to ensure that the modulation in each element is equal. 9Test films for measuring non-uniformity of film velocity of movement (flutter) The characteristics of the test signal for measuring the non-uniformity of film velocity of movement shall be as given in Table 9. Table 9 Test signal characteristic 35 mm a 16 mm Frequency at 24 frames per second, Hz3 1503 150 Tolerance
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