1、= 3404583 OLL3507 073 BRITISH STANDARD Analogue audio recording on video tape - Polarity of magnetization BS EN The European Standard EN 61213 : 1994 has the status of a British Standard Enregistrement aiidio-analogique sur bande vido - Polaritt der Magnetisierung Polarit6 de niagntisation Analoge T
2、onaiifzeichnung auf Videoband - UD( (i21 39 464 61213 : 1994 EC 1213 : 1993 3404583 Oll3508 TOT Amd. No. Date BS EN 61213 : 1994 Text affected Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC) under whose supervision this European Standard was prepared c
3、omprises the national committees of the following countries: Austria Belgium Denmark Finland France Germany Greece Iceland Ireland Italy Luxembourg Netherlands Norway Portugal Spain Sweden Switzerland United Kingdom This British Standard, having been prepared under the direction of the Electronic Eq
4、uipment Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 July 1994 ELSI 1994 The following BSI references relate to the work on this standard: Committee reference EEL/22 Draft for comment 931203807 DC ISBN O 580 23387 1 m 3404583 033350
5、9 99b m BS EN 61213 : 1994 Contents Cooperating organizations National foreword page Inside front cover i Foreword Specification 1 Scope 2 3 2 Normative references 3 3 General 3 4 equipment 4 5 Direction of magnetization of analogue baseband audio recordings 4 recording 5 Preservation of overall pol
6、arity in audio recording and processing 6 Annexes A (informative) Bibliography 6 ZA (normative) Other international publications quoted in this standard 8 NA (informative) Committees responsible Inside back cover NB (informative) Cross-references Inside back cover Polarity of deviation of frequency-
7、modulation of audio signals in FM with the references of the relevant European publications Figure 1 Method of testing the polarity characteristic of an audio analogue baseband recorder 7 National foreword This British Standard has been prepared under the direction of the Electronic Equipment Standa
8、rds Policy Committee and is the English language version of EN 61213 : 1994 Analogue audio recording on video tape - filarity of magnetization published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC 1213 : 1993 published by the International Elect
9、rotechnical Commission (IEC). Compliance with a British Standard does not of itself confer immunity from legal obligations. i m 3404583 Oll35lO bb8 9 EUROPEAN STANDARD EN 61213 NORME EUROPENNE EUROPISCHE NORM January 1994 lJM: (i21 .:197.4.54 Iks(ripton: Elr(.troa(.oiisti(.:, sound recording, signal
10、 processing, analog signal, polarization, magnetism, magnetic tapes, tests English version Analogue audio recording on video tape - Polarity of magnetization (IEC 1213 : 1993) Enregistrement audio-analogique sur bande vido - Polarit de magntisation (CE1 1213 : 1993) Analoge Tonaufzeichnung auf Video
11、band - Polaritt der Magnetisierung (IEC 1213 : 1993) This European Standard was approved by CENELEC on 1993-12-08. CENELEC members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without a
12、ny alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language ma
13、de by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Icel
14、and, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de
15、Stassart 35, B-1050 Brussels O 1994 Copyright reserved to CENELEC members Ref. No. EN 61213 : 1994 E m 3404583 0113511 5T4 m Page 2 EN 61213 : 1994 Foreword The text of document 60B(C0)155, as prepared by Sub-committee 60B: Video recording, of IEC Technical Committee 60: Recording, was submitted to
16、the IEC-CENELEC parallel vote in February 1993. The reference document was approved by CENELEC its EN 61213 on 8 December 1993. The following dates were fixed: - latest date of publication of an identical national standard (dop) 1994- 12-0 1 - latest date of withdrawal of conflicting national standa
17、rds (dow) 1994-12-01 Annexes designated normative are part of the body of the standard. Annexes designated informative are given only for information. In this standard, annex A is informative and annex ZA is normative. 340ir583 OLL35L2 ir30 Page 3 EN 61213 : 1994 ANALOGUE AUDIO RECORDING ON VIDEO TA
18、PE - POLARITY OF MAGNETIZATION 1 Scope This International Standard applies to audio recording and processing, and gives requirements for the preservation of signal polarity, together with methods of test which are not already included in other standards. It is based on, and consistent with, the rele
19、vant text in IEC 268-2, and the connector applications standardized in IEC 268-1 1 and IEC 268-1 2. NOTE - Polarity characteristics of audio transducers are dealt with in IEC 268-4, IEC 268-5 and IEC 268-9. 2 Normative references The following normative documents contain provisions which, through re
20、ference in the text, constitute provisions of this Intemational Standard. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of ap
21、plying the most recent editions of the normative documents indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IEC 268-2: 1987, Sound system equipment - Part 2: Explanation of general terms and calculation methods Amendment 1 (1991) IEC 268-11: 1987
22、, Sound system equipment - Part 11: Application of connectors for the interconnection of sound system components Amendment 1 (1989) Amendment 2 (1991) IEC 268-12: 1987, Sound system equipment - Part 12: Application of connectors for broadcast and similar use Amendment 1 (1991) 3 General For explanat
23、ions of terms, general characteristics to be specified and methods of measurement, reference is required to IEC 268-2. The preservation of signal polarity in audio recording and processing equipment is important for two main reasons: a) the polarity relationship between channels of a stereo pair or
24、multichannel set of signals is of fundamental importance in the correct re-creation of the sound field; 3404583 OLL35L3 377 H Page 4 EN 61213 : 1994 b) some audio signals are significantly asymmetrical, and polarity inversion can be detected, at least in critical listening conditions. 4 Preservation
25、 of overall polarity in audio recording and processing equlpment 4. 1 Requirements When set for normal operation (see note), equipment with audio recording and reproduction facilities and equipment with audio processing facilities (except as described in 4.2) shall preserve polarity from inputs to o
26、utputs, with reference to the signal polarities specified for connector applications given in IEC 268-1 1 and/or IEC 268-12. NOTE - For the purposes of his subclause, normal operation means that polarity inversion facilities and inverting inputs are not used. 4.2 Porarity inversion facilities The pr
27、ovision of polarity inversion facilities (including self-contained “inverting units“) andlor inverting inputs is permitted, provided they are marked in accordance with the requirements of IEC 268-2. NOTE - Recordings made with deliberate polarity inversion of one channel (for artistic effect. for ex
28、ample) should be labelled, or include a voice message, in explanation. 5 Direction of magnetization of analogue baseband audio recordings 5.1 Requirements The direction of magnetization due to a positive-going signal applied at a non-inverting input of the recorder shall be the same as the direction
29、 of motion of the tape. It is, however, difficult to measure the direction of magnetization of the tape directly. The procedure adopted is therefore to specify that the polarity of response of the reproduce chain from the reproduce head to the output, measured in accordance with 5.2, shall be non-in
30、verting, and then to specify that the polarity of signal connection for the record head shall be such that the requirements of 4.1 are met. The requirements of this subclause are then automatically met. 5.2 Method of test With reference to figure.1, an asymmetrical current is passed through a single
31、 conductor placed close to the reproduce head, the relationship between the positive direction of current and the direction of tape travel being as shown in figure 1. A positive-going signal shall then be obtained at the positive polarity output terminal of the reproduce amplifier, as specified in I
32、EC 268-1 1 or IEC 268-12. 3404583 OLL35L4 203 Page 5 EN 61213 : 1994 6 Polarity of deviation of frequency-modulation of audio signals In FM recording Unless otherwise specified in the standard applying to the recording system, a positive- going audio signal applied to the positive polarity input ter
33、minal of the recording amplifier, as specified in IEC 268-11 or IEC 268-12, shall produce an upward deviation of the carrier frequency . = 3404583 OLL35L5 L4T Page 6 EN 61213 : 1994 Annex A (informative) Bibliography I EBU R50 Conservation of the polarity of audio signais in radio and television pro
34、gramme production, 1900 2 SMPTE RP 134 Polarity for analog audio magnetic recording and reproduction, 1986 3404583 0333536 08b Page 7 EN 61213 : 1994 m 3404583 OLL3517 TL2 Page 8 EN 61213 : 1994 Annex ZA (normative) Other international publications quoted in this standard with the references of the
35、relevant European publications This European Standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to
36、or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. NOTE. When the international publication has been modified by CENELEC common modification
37、s, indicated by (mod), the relevant EN/HD applies. IEC publication 268-2 Al 268- 11 Al A2 268- 12 Al Date 1987 1991 1987 1989 1991 1987 1991 Title ENIHD Date Sound system equipment HD 483.2 S2 1993 Part 2: Explanation of gunera1 temzs and calculation methods Part 11 : Application of connectors for t
38、k interconnection of sound system cmpms HD 483.11 S3 1993 Part 12: Application of connectm for HD 483.12 S2 1993 broadcast and similar use 3YOY583 0333538 959 BS EN 61213 : 1994 National annex NA (informative) Committees responsible The United Kingdom participation in the preparation of this Europea
39、n Standard was entrusted by the Electronic Equipment Standards Policy Committee (EEL/-) to Technical Committee EEL/22 upon which the following bodies were represented: Association of Professional Recording Services Ltd . Audio Engineering Society British Broadcasting Corporation British Kinematograp
40、h, Sound and Television Society British ?ape Industry Association Federation of the Electronics Industry Independent Television Association National Council for Educational Technology (NCET) Royal Photographic Society Royal Television Society National annex NB (informative) Cross-references Publicat
41、ion referred to Corresponding British Standard BS 6840 Sound systmi equipment Part 2 : 1993 Glossary of geitmal terms an,d calc-ulation methods Part 11 : 1994 Specfication.for application qf conmectors for the interconnection of sound system components lart 12 : 1993 Specification for application of
42、 connectors for broadcast and similar use HD 483.2 S2 : 1993 HD 483.11 S3 : 1993 (IEC 268-11 : 1987) HD 483.12 S2 : 1993 (IEC 268-12 : 198) (IEC 268-2 : 1987) = 3404583 OlL35L 895 = BS EN 61213 : 1994 IEC 1213 : 1993 BSI 2 Park Street London W1A 2BS BSI Linford Wood Milton Keynes MK14 6LE 9407 - 5 -
43、 0.4k - FP BSI - British Standards Institution BSI is t,he independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Contract requirements A British Standard does not purp
44、ort to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Revisions British Standards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or % editions. An
45、y person who finds an inaccuracy or ambiguity while using this British Standard should notify BSI without delay so that the matter may be investigated swiftly. BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of st
46、andards. Buying standards Orders for all BSI, international and foreign standards publications should be addressed to Customer Services, Publications at Milton Keynes: El: 0908 221166; Fax: 0908 322484. In response to orders for international and European standards, it is BSI policy to supply the BS
47、I implementation of those that have been published as British Standards, unless otherwise requested. Information on standards BSI provides a wide range of information on national, European and international standards through its Library, the Standardline Database, the BSI Information Technology Serv
48、ice (BITS) and its Technical Help to Exporters Service. Contact Customer Services, Information at Milton Keynes: Tel: 0908 226888. 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
49、 other benefits contact Head of Customer Services, Membership Group at Milton Keynes: Tel: 0908 226777. Copyright Copyright subsists in all BSI publications and no part may be reproduced in any form without the prior permission in writing of BSI. This does not preclude the free use, in the course of implementing the standard of necessary details such as symbols and size, type or grade designations including use by incorporation into computer programs, but where these details are reproduced including without limitation in printed form, in computer prog
