is 12773 (1989): cinematography - recorded characteristics ...is 12773 (1989): cinematography -...

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Disclosure to Promote the Right To Information Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public. इंटरनेट मानक !ान $ एक न’ भारत का +नम-णSatyanarayan Gangaram Pitroda “Invent a New India Using Knowledge” प0रा1 को छोड न’ 5 तरफJawaharlal Nehru “Step Out From the Old to the New” जान1 का अ+धकार, जी1 का अ+धकारMazdoor Kisan Shakti Sangathan “The Right to Information, The Right to Live” !ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता ह Bharthari—Nītiśatakam “Knowledge is such a treasure which cannot be stolen” IS 12773 (1989): Cinematography - Recorded characteristics of magnetic sound record on 35 mm motion picture magnetics film [MED 32: Photographic Equipment]

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Page 1: IS 12773 (1989): Cinematography - Recorded characteristics ...IS 12773 (1989): Cinematography - Recorded characteristics of magnetic sound record on 35 mm motion picture magnetics

Disclosure to Promote the Right To Information

Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.

इंटरनेट मानक

“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda

“Invent a New India Using Knowledge”

“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru

“Step Out From the Old to the New”

“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan

“The Right to Information, The Right to Live”

“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam

“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 12773 (1989): Cinematography - Recorded characteristicsof magnetic sound record on 35 mm motion picture magneticsfilm [MED 32: Photographic Equipment]

Page 2: IS 12773 (1989): Cinematography - Recorded characteristics ...IS 12773 (1989): Cinematography - Recorded characteristics of magnetic sound record on 35 mm motion picture magnetics
Page 3: IS 12773 (1989): Cinematography - Recorded characteristics ...IS 12773 (1989): Cinematography - Recorded characteristics of magnetic sound record on 35 mm motion picture magnetics
Page 4: IS 12773 (1989): Cinematography - Recorded characteristics ...IS 12773 (1989): Cinematography - Recorded characteristics of magnetic sound record on 35 mm motion picture magnetics

IS 12773 : 1989

Indian Standard

CINEMATOGRAPHY - RECORDED CHARACTERISTICS OF MAGNETIC SOUND

RECORD ON 35 mm MOTION-PICTURE MAGNETIC FILM - SPECIFICATION

UDC 778’534 - 455 : 771’531.351

@ BIS 1991

BUREAU OF INDIAN STANDARDS MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG

NEW DELHI 110002

March 1991 Price Group 1

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Cinematographic Equipment Sectional Committee, ETDC 47

FOREWORD

This Indian Standard was adopted by the Bureau of Indian Standards on 8 September 1989 after the draft finalized by the Cinematographic Equipment Sectional Committee had been approved by the Electrotechnical Division Council.

While preparing this standard assistance has been derived from the following:

i) IS0 8590-1985 Cinematography - Audio Records on 35 mm and 70 mm motion-picture release prints with magnetic stripes - recorded characteristics

ii) ANSI PH22 -208M-1984 Motion-picture film ( 35 mm ) - recorded characteristic - magnetic audio records issued by American National Standard Institute ( USA ).

For the purpose of deciding whether a particular requirement of this standard is complied with, the final value, observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS 2 : 1960 ‘Rules for rounding off numerical values (revised )‘. The number of signi- ficant places retained in the rounded off value should be the same as that of the specified value in this standard.

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IS 12773 : 1989

Indian Standard

CINEMATOGRAPHY - RECORDED CHARACTERISTICS OF MAGNETIC SOUND

RECORD ON 35 mm MOTION-PICTURE MAGNETIC FILM - SPECIFICATION

1 SCOPE

1.1 This standard specifies, for studio use, the recorded characteristics of magnetic audio records on 35 mm motion-picture magnetic film when reproduced at the nominal speed of 24 frames ( 457 mm > per second.

2 RECORDED CHARACTERISTLC

2.1 With a constant amplitude sine-wave applied to the input of the recording system, the relative characteristic in effective values of the short-circuit magnetic flux versus frequency shall decrease with increasing frequency proportionately to the imoedance of a combination of capacitance and resistance having time constants of T = 35 ps and 3 180 ps ( see the note ). The characteristic t;Fiiuda above is obtained by the following

The corresponding reproducing characteristic is that which gives a flat response when reproducing a sound track recorded with the relative short- circuit flux level defined above.

3 TOLERANCES

3.1 Magnetic audio records shall be recorded to the characteristic specified in 2 within the tole- rances given in Table 1.

Table 1 Relative Magnetic Flux Level

( Clause 3.1 )

Frequency dR

P-IZ 40 5o 63

1 + ( 2nTh)2f2 -.___

‘% = &- lo log,0 I--+ I]-[ ( 2n,r, )3fm2]

where

Lv# is the recorded relative magnetic flux level, in decibels;

f is the frequency, in hertz;

-rl is the time constant of 3 180 ps;

oh is the time constant of 35 ps; and

C, is a constant calculated to make L+ = 0 at the reference frequency of I 000 Hz.

The approximate numerical values are given in the table, with the values of the recorded magnetic characteristic normalized to 1 000 Hz.

X0

100 125 160 200 250 315 400 500 630 800

I 000 I 250 1 600 2 000 2 500 3 150 4 000 5 000

NOTE - A time constanl such as that defined by a 6 300

frequency response curve is shorthand notation 8 000

having the shape defined &y-a time constant of one 10 000 or more microseconds. ‘l‘hts is a convenient way of defining a response curve, and is not intended as

12 500

a recommended electrical circuit. 16 000

4.28 3’20 2’31 1’62 1’16 0’83 0’59 0’45 0’35 0’28 0’22 0’18 0,13 0’07 0.00

- 0.12 - 0’31 - 0.58 - 0.96 - 1.51 - 2.30 - 3.25 - 4.46 - 5,93 - 7.47 - 9.13 - 11.07

c--

+

2.0 2.0 1’5 1’3 1’0 1’0 1.0 I .o 1’0 I.0 1’0 1.0 1.0 1.0 1.0 1.0 1.0 1’0 1’0 1.0 1’0 1.0 1.3 1’5 2.0 2.0 2.0

Tolerances -h___7

- 4.0 4.0 3’0 2.0 1.0 1.0

1'0 1.0 I.0 1’0 1.0 1’0 1’0 1.0 10 1.0 1’0 1.0 1’0 1.0 1.0

1’0 I.0 2.0 2’5 3.5 3’5

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--

Standard Mark

The use of the Standard Mark is governed by the provisions of the But-em of Indian Standards Act, 1986 and the Rules and Regulations made thereunder. The Standard Mark on products covered by an Indian Standard conveys the assurance that they have been produced to comply with the requirements of that standard under a well defined system of inspection, testing and quality control which is devised and supervised by BIS and operated by the producer. Standard marked products are also continuously checked by BIS for conformity to that standard as a further safeguard. Details of conditions under which a licence for the use of the Standard Mark may be granted to manufacturers or producers may be obtained from the Bureau of Indian Standards.

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Bureau of Indian Standards

BIS is a statutory institution established under the Bureau of Indian Standards AC?, 1986 to promote harmonious development of the activities of standardization, marking and quality certification of goods and attending to connected matters in the country.

Copyright

BIS has the copyright of all its publications. No part of these publications may be reproduced in any form without the prior permission in writing of BIS. This does not preclude the free use, in the course of implementing the standard, of necessary details, such as symbols and sixes, type or grade designations. Enquiries relating to copyright be addressed to the Director ( Publications ), BIS.

Revision of Indian Standards

Indian Standards are reviewed periodically and revised, when necessary and amendments, if any, are issued from time to time. Users of Indian Standards should ascertain that they are in possession of the latest amendments or edition. Comments on this Indian Standard may be sent to BIS giving the following reference:

Dot : No. ETD 47 ( 2889 )

Amendments Issued Since Publication

Amend No. Date of Issue Text Affected

BUREAU OF INDIAN STANDARDS

Headquarters :

Manak Bhavan, 9 Bahadur Shah Zafar Marg, New Delhi 110002 Telephones : 331 01 31, 331 13 75 Telegrams : Manaksanstha

C Common to all OfFices )

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Central : Manak Bhavan, 9 Bahadur Shah Zafar Marg NEW DELHI 110002

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331 01 31 331 13 75

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- Printed at Priotwell Printers. Delhi, India