1、- - CENELEC EN+b0843-2 95 D 3404583 0Lb40l13 250 A BRITISH STANDARD Helical-scan video tape cassette system using 8 mm magnetic tape - 8 mm Video Part 2. PCM multi-track audio system The European Standard EN 60843-2 : 1995 has the status of a British Standard ICs 33 160.40 - - -7 5s EN 60843-2 : art
2、 2 : 1995 5s 7065 : art 2 : 1994 EC 843-2 : 1992 BS 7065 : Part 2 : 1994 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Electronic Equipment Standards Policy Committee (EEL!-) to Rchnical Committee EEW22 upon which the following bodies
3、were represented: Association of Professional Recording Services Ltd. Audio Engineering Society British Broadcasting Corporation British Kinematograph, Sound and Rlevision Society British Ripe Industry Association Electronic Components Industry Federation Independent Ilevision Association National C
4、ouncil for Educational Technology (NCET) Royal Photographic Society Royal Television Society This British Standard, having been prepared under the direction of the Electronic Equipment Standards Policy Committee, was published under the authority of the Standards oard and conies into effect on 15 Ma
5、rch 1094 O BSI I994 The following HSI references relate to the work on this standard: Committee reference EEL/22 Draft for cornnient 91/20968 DC ISBN O 580 23040 6 Amendments issued since publication Amd. No. I Date I .u-.- a- CENELEC ENrb0843-2 95 = 3404583 Olib40l1.5 023 = BS 7065 : Part 2 : 1994
6、Contents Committees responsible Page Inside front cover National foreword 1 1 I. 1 1.2 2 2.1 2.2 3 3.1 4 5 General Normative references Pack configuration and dimensions Track allocation and track number Recording track pattern Tracking pilot signal recording Recording current Multi-track mode recog
7、nition signal %ope Assignment of ID words 3 Annexes A Multi-track mode recognition signal (MTS) 5 B Assignment of ID words (mode 7) 6 Tables 1 hck area allocation and wrap angie 2 2 Assignment of mode 7 ID words 4 B.l ID 1 (recording conditions) 6 B.2 ID 2 and ID 3 (time) 7 B.3 ID 2 and ID 3 codes 8
8、 B.4 II) 4 (Program nurnber/C-number) 9 Figures 1 Track docation and track number 2 2 Track configuration 3 B.l Mode 7 recording sequence examples 9 B.2 B7 controi bit of ID 1 10 B.3 Cue mark and blank mark 10 B.4 11 B.5 Examples of ID 4 recording sequences 11 Examples of ID 2 and ID 3 recording seq
9、uences i CENELEC ENrb0843-2 95 D 3404583 OLb40Lb TbT i%! BS 7065 : Part 2 : 1994 National foreword A This British Standard has been prepared by Technid Committee EPW60 and is the English language version of EN 60843-2 : 1995 Helzcal-scan WXO tupe cassette system wing 8 mm magnetic tape - 8 mm video,
10、 Part 2: PCM mdti-tmck audio system, published by the European Committee for Eiectrotechnid Standardization (CENELEC). It is identid with IEC 843-2 : 1992, pubiished by the internond Electrotechnid Commission (IEC). The designation as BS 7065 : Part 2 has been retained for ease of reference to other
11、 Parts of the BS 7065 series. Cross-references Publications referred to Correspondmg British Standard BS EN 60843 Helical-scan video tape cassette system using 8 mmtmagnetk tape-8mm Video Patt 1 : 1994 General speclficat2ons Part 3 : 1993 High-knd specifkations for Hi 8 BS EN 61105 : 1994 Specifkati
12、on for reference tupes for video tupe recorder EN 60843-1 : 1994 (IEC 843-1 : 1993) EN608433: 1993 (IEC 843-3 : 1993) EN 61105 : 1993 (IEC 1105: 1991) systems Compliance with a British Standard does not of itself confer immunity from legal obligations ii CENELEC EN*b0843-2 95 = 3404583 OLb40L7 9Tb =
13、 -, EUROPEAN SIANDARD NORME EUR0PEE”E EITROPE NORM EN 60845.2 June 1995 ICs 33.160.40 Descriptors: Video recording, sound recording, electroacoustic equipment, video tape recorder, magnetic tapes, cassettes for magnetic tapes, recording tracks, specifications, dimensions, recording characteristics E
14、nglish version Helical-scan video tape cassette system using 8 mm magnetic tape - 8 rnm Video Part 2: PCM multi-track audio system (EC 843-2 : 1992) Systme de magntoscope cassette balayage hlicodal utilisant la bande magntique de 8 mm Vido 8 mm Partie 2: Systme audio multipiste MIC (CE1 843-2 : 1992
15、) Videoband-Kassettensyskm mit Schrhgspurauzeichnung auf Magnetband 8 mm 8 mm Video Teil 2: PCM-Vielfachpur-Audiosystem (IEC 8432 : 1992) This European Sandard was approved by CENELEC on 1995-0515. CENELEC members are bound to comply with the CENKENELEX Intemal Reguiations which stipulate the condit
16、ions for giving this European Standard the status of a national standard without any 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 ed in three o
17、fficial versions (Engiish, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariai has the same status as the official versions. CENELEC members are the national electrotechnical c
18、ommittees of Austria, Belgium, Denmark, Finiand, France, Germany, Greece, Iceland, Ireland, Itaiy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique
19、 Europisches Komitee fr Elektrotechnische Normung Centrai Secretariat: rue de Stassart 35, B-1050 Brussels O 1995 Copyright reserved to CENELEC members Ref. No. EN 60843-2 : 1995 E CENELEC ENxb0843-2 95 = 3404583 Olb40LB 832 Page 2 EN 60843-2 : 1995 Foreword The text of the International Standard iE
20、C 8432 : 1992, prepared by SC 60B, Video recording, of IEC TC 60, Recording, was submitted to the formal vote and was approved by CENELEC as EN 608432 on 19950515 without any modincation. “he following dates were ked: - latest date by which the EN has to be implemented at nationai level by publicati
21、on of an identical naional standard or by endorsement (dop) 1996-07-01 - latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 199647-01 c t Annexes designated normative are part of the body of the standard. In this standard, annexes A, B and ZA are normative
22、. Annex ZA has been added by CENELEC. CENELEC ENrb0843-2 95 W 3404583 OLb40L9 779 Bs 7065 : hi% 2 : 1994 HELICAL-SCAN VIDEO TAPE CASSETTE SYSTEM USING 8 mm MAGNETIC TAPE - 8 mm VIDEO Part 2: PCM multi-track audio system 1 General 1.1 Scope This part of IEC 843 provides multi-track specifications for
23、 PCM audio recording and playback with 8 mm video systems. This part is applicable to both 525 line - 60 field and 625 line - 50 field TV signals. 1.2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this pari o
24、f IEC 843. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this part of IEC 843 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated b
25、elow. Members of IEC and IS0 maintain registers of currently valid International Standards. IEC 843-1, Helical-scan video tape cassette system using 8 mm magnetic tape - 8 mm Video - Part 7: General (in preparation). IEC 843-3, Helical-scan video tape cassette system using 8 mm magnetic tape - 8 mrn
26、 Video - Part 3: High-band specifications for 8 mm Video - Hi 8 (in preparation). IEC 1 105: 1991, Reference tapes for video tape recorder systems. 1 CENELEC EN*b0843-2 95 m 3404583 O364020 490 m BS 7065 : Part 2 : 1994 -i b C d 2 Track configuration and dimensions 2.1 Track allocation and track num
27、ber Data area After-recording margin including f5 Track guard IEC %W2 26.32“ (38.4 H) Figure 1 - Track allocation and track number Table 1 - Track area allocation and wrap angle 26,29“ (45.6 H) Content 2.06“ (3.0 H) a 2.09“ (3.6 H) Clock run-in 2.62“ (3.8 H) 2.62“ 4.5 H) 525 line 1 625 line I 1) 60
28、field system 50 field system 2.06“ (3.0 H) 2.09“ (3.6 H) 5.0“ (7.3 H) 1 5.0“ (8,7 H) 1 2) NOTES 1 Minimum value. 2 Maximum value. 3 The tolerance of the recording position is: f 1,03* (i 1.5 H) for the 525 line - 60 field system I 1.04“ (I 1.8 H) for the 625 line - 50 field system (H is a horizontal
29、 scanning line) 2 BS 7065 : Part 2 : 1994 2.2 Recording track pattern PCM audio signals can be recorded on any one of the six tracks, independently of other tracks (see figure 2). IEC 95392 Direction of tape travel - Figure 2 - Track configuration 3 Tracking pilot signal recording 3.1 Recording curr
30、ent The recording current shall be 12 f 3 d6 below the level of the chrominance recording current specified in IEC 843-1. 4 Multi-track mode recognition signal One proposal regarding the multi-track mode recognition signal (MTS) is described in annex A. 5 Assignment of ID words For mode 1 to mode 6,
31、 see 22.2.5 and 22.2.6 of iEC 843-1. Mode 7 ID words shall be used specifically for the PCM multi-track system. The assignment of ID words shall be as described in table 2. 3 CENELEC EN*60843-2 95 m 3404583 0364022 263 m 10 O 10 1 ! BS 7065 : Part 2 : 1994 Mode number Recording conditions Table 2 -
32、Assignment of mode 7 ID words 1 1 1 O O O O O Binary ID 2 ID 3 Time Program number/ C-number See annex B BO B1 82 83 84 85 B6 87 Num eral Numeral Numeral NOTE - Mode 7 10s shall be recorded in every two frames at least using the CH-1 head. Recording of other mode IDS shall be made by the CH-2 head.
33、When not using mode 7 IDS, all O shall be recorded by the CH-1 head. The use of ID 2 to ID 4 in mode 7 is optional and when not in use, O shall be recorded at their positions. See annex B for examples of mode 7 recording sequences. Annex A (normative) Multi-track mode recognition signal (MTS) Freque
34、ncy multiplexing with the PCM carrier and the tracking pilot signal is used for recording the multi-track mode recognition signal (MTS) in order to ensure automatic reproduction mode selection and recorded signal detection. The multi-track mode recognition signal is required to satisfy the following
35、 requirements. a) Frequency 228 748 f 100 Hz (378 fH/26) for the 525line - 60 field system 225.361 f I00 Hz (375 fW26) for the 625 line - 50 field system The harmonic distortion shall not exceed -20 dB. b) Recording current The recording current shall be 12 f 3 dB below the level of the chrominance
36、recording current specified in IEC 843-1. c) Recording area The multi-track recognition signal shall be recorded continously except the track guard area “da (see figure I). 5 CENELEC EN*b0843-2 95 m 3404583 0364024 03b m i BS 7065 : Part 2 : 1994 i 1 Next track number ) 81 82 83 O 1 1: Trackn“ 1 l 1
37、 O 1: Trackn“2 1 O O 1: Trackn“3 1 1 O: Trackn“4 O 1 O: Trackn-5 1 1 O O: Trackn“6 I1 1 1: Increment Annex B (normative) 87 B6 B5 84 Assignment of ID words (mode 7) O: Control bit ) Cue mark2) 1: NO cue mark O: Cue mark Blank mark 2, 84 85 O O: Invalid 1 O: Sound 1 1: Blank mark Table B.l - ID 1 (re
38、cording conditions) Tape speed 4 81 82 O O: Standard play 1 O: Y2 tape speed O 1: Other 1 1 1: Other 2 io I 04) ,ding conditions) 1: Control bit ) O Following recording position on the next track O: Type 1 - Same as the position on the present track 1 : Type 2 - Beginning of the next track 1 NOTES 1
39、 2 3 See figure 8.2 for 87 (control bit) of ID 1 See figure 8.3 for cue and blank marks. See figure 8.2 for the following recording position on the next track and the track number. 4 When not using 84 to 87 of ID 1 : BO to 83 of ID 1 in mode 7 are mandatory and others are optional. - BO shall be -0.
40、; - - 83 shall be -1.; - 81 and B2 shall be tape speed; 84 to B7 shall all be -0.- 6 Table 8.2 - ID 2 and ID 3 (time) ID O ID 2 ID3 BO B1 82 B3 84 B5 B6 87 Coding Made number 1 1 1 O O0 O O Binary mX: 0908 322484. In response to orders for international and European standards, it is BSI policy to su
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43、f these and other benefits contact Head of Customer Services, Membership Group at Milton Keynes: Tel: O908 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 th
44、e 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 programs or in any other form whatso
45、ever, the permission in writing of BSI must be obtained and if granted will be on terms including royalty, before the product is sold, licensed or otherwise exploited for commercial gain. Enquiries about copyright should be made to the Copyright Manager, Publications at Milton Keynes. ISBN O 580 230
46、40 6 EEW22 AMD 8874 Amendment No. 1 published and effective from 15 November 1995 to BS 7065 : Part 2 : 1994 Helical-scan video tape cassette system using 8 mm magnetic tape - 8 mm Video Part 2. PCM multi-track audio system NOTE. The European Committee for Electrotechnical Standardization (CENELEC)
47、has accepted IEC 843-2 : 1992 as a European Standard designate as EN 60843-1 : 1995. This amendment implements EN 60843.2 : 1995 as a British Standard in the BS EN series. Implementation of European Standard Front cover Delete the outside front cover and substitute the attached. AMD 88744November 19
48、95 -_-_-_-_-_-_ National foreword Delete the text of the national foreword and substitute the following. Tkis British Standard has been prepared by Technical Committee EPU60 and is the English language veision of EN 608432 : 1995 HdimL-scan video tape cassette system using 8 mm magnetic tape - 8 mm
49、video, Part 2: PCM multi-tmck audio system, pubiished by the European Commim for Electrotechnical Sta.ndarWon (CENELEC). It is identical with LEC 843-2 : 1992, published by the Intemational Electrotechnical Commission (EX). The designation as BS 7065 : Part 2 has been retained for ease of reference to other Parts of the BS 7065 series. Cross-references Publications referred to Corresponding British Standard BS EN 60843 HdicaL-scan video tape cassette sys
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