1、BRITISH STANDARD BS EN 61327:1996 IEC1327:1995 Helical-scan digital composite video cassette recording system using12,65mm(0,5in) magnetic tape Format D-3 The European Standard EN61327:1995 has the status of a BritishStandard ICS 33.160.40BSEN61327:1996 This BritishStandard, having been prepared und
2、er the directionof the ElectrotechnicalSector Board,was published undertheauthority of the StandardsBoard and comes into effect on 15 March1996 BSI 01-2000 The following BSI references relate to the work on this standard: Committee reference EPL/60 Draft for comment 93/210793 DC ISBN 0 580 25268 X C
3、ommittees responsible for this BritishStandard The preparation of this BritishStandard was entrusted to Technical Committee EPL/60, Recording, upon which the following bodies were represented: Association of Professional Recording Services Limited Audio Engineering Society British Broadcasting Corpo
4、ration British Kinematograph, Sound and Television Society British Tape Industry Association Federation of the Electronics Industry ITV Association (ITVA) Royal Photographic Society Royal Television Society Amendments issued since publication Amd. No. Date CommentsBSEN61327:1996 BSI 01-2000 i Conten
5、ts Page Committees responsible Inside front cover National foreword ii Foreword 2 Text of EN 61327 7 List of references Inside back coverBSEN61327:1996 ii BSI 01-2000 National foreword This BritishStandard has been prepared by Technical Committee EPL/60 and is the English language version of EN61327
6、:1995 Helical-scan digital composite video cassette recording system using12,65mm(0,5in) magnetic tape FormatD-3, published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC1327:1995, published by the International Electrotechnical Commission (IEC). A
7、 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-references Publication referred to C
8、orresponding BritishStandard EN60735:1991 (IEC735:1991) BS EN60735:1992 Methods for measurement of video tape properties EN60958:1990 (IEC958:1989) BS EN60958:1995 Specification for digital audio interface EN61179:1993 (IEC1179:1993) BS EN61179:1993 Specification for helical-scan digital composite v
9、ideo cassette recording system using19mm magnetic tape, format D2 (NTSC, PAL, PAL-M) HD507 S1:1988 (IEC461:1986) BS6865:1987 Specification for time and control codes for video tape recorders Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theEN title page
10、, pages2 to120, an inside back cover 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.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61327 October 1995 ICS 33.
11、160.40 Descriptors: Recording apparatus, digitalrecording, magnetoscopes, magnetic tapes, cassettes for magnetic tape, characteristics, mechanical properties, dimensions, interfaces, signal processing, video signals, acoustic signals, recording track English version Helical-scan digital composite vi
12、deo cassette recording system using12,65mm(0,5in) magnetic tape Format D-3 (IEC1327:1995) Systme de magntoscope numrique chrominance composite cassette balayage hlicodal utilisant la bande magntique de12,65mm(0,5in) Format D-3 (CEI1327:1995) Videokassettensystem mit Schrgspuraufzeichnung digitaler C
13、omposite-Signale auf Magnetband12,65mm(0,5in) D3-Format (IEC1327:1995) This European Standard was approved by CENELEC on1995-09-20. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national
14、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 exists in three official versions (English, French, German). A version in any
15、 other language made 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, Ger
16、many, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Sec
17、retariat: rue de Stassart 35, B-1050 Brussels 1995 Copyright reserved to CENELEC members Ref. No. EN61327:1995 EEN61327:1995 BSI 01-2000 2 Foreword The text of document60B/255/DIS, future edition1 of IEC1327, prepared by SC60B, Video recording, of IEC TC60, Recording, was submitted to the IEC-CENELE
18、C parallel vote and was approved by CENELEC as EN61327 on1995-09-20. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. Annexes designated “informative” are given for information only. In this standard,Annex A,Annex B andAnnex ZA are normative andAnn
19、ex C is informative. Annex ZA has been added by CENELEC. Contents Page Foreword 2 Introduction 7 1 General 7 1.1 Scope and object 7 1.2 Normative references 7 1.3 Definitions, symbols and abbreviations 7 2 Technical data 8 2.1 Environment and test conditions 8 2.2 Reference tape 8 2.3 Calibration ta
20、pe 8 2.3.1 Record locations and dimensions 8 2.3.2 Calibration signals 9 2.3.3 Purchase 9 3 Video tape cassette 9 3.1 Mechanical parameters 9 3.1.1 Cassette dimensions 9 3.1.2 Identification of cassettes 9 3.1.3 Tape length, thickness and play times 10 3.1.4 Coating face 10 3.1.5 Datum planes 10 3.1
21、.6 Window and labels 10 3.1.7 Identification holes 10 3.1.8 Leader/trailer tape 11 3.1.9 Reels 11 3.1.10 Lid 11 3.2 Video tape specification 12 3.2.1 Base 12 3.2.2 Width 12 3.2.3 Width fluctuation 12 3.2.4 Reference edge straightness 12 3.2.5 Tape thickness 12 3.2.6 Transmissivity 12 3.2.7 Offset yi
22、eld strength 12 3.2.8 Magnetic coating 12 3.2.9 Coating coercivity 12 3.2.10 Particle orientation 12 4 Helical recordings 13 4.1 Tape speed 13 4.2 Erase head and record location and dimensions 13 4.2.1 Erase head 13 4.2.2 Record location and dimensions 13 4.2.3 Reference edge 13 latest date by which
23、 the ENhas to be implemented at national level by publication of an identical national standard or by endorsement (dop)1996-07-01 latest date by which the national standards conflicting with the EN haveto be withdrawn (dow)1996-07-01EN61327:1995 BSI 01-2000 3 Page 4.2.4 Track pitch 13 4.2.5 Flying e
24、rase heads 13 4.3 Helical track record tolerance zones 13 4.4 Relative positions of recorded signals 13 4.4.1 Relative positions of the longitudinal tracks 13 4.4.2 Helical/control track relationship 13 4.4.3 Programme area reference point 14 4.5 Gap azimuth 14 4.5.1 Cue track, control track, time a
25、nd control code track 14 4.5.2 Helical track 14 4.6 Transport and scanner 14 5 Programme track data arrangement 14 5.1 Introduction 14 5.2 Labelling convention 15 5.3 Sector details 15 5.3.1 Sync block 15 5.3.2 Sync pattern 15 5.3.3 Identification pattern 15 5.3.4 Data field 16 5.3.5 Sector preamble
26、 17 5.3.6 Sector postamble 17 5.4 Edit gaps 18 5.5 Channel coding 18 5.5.1 Coding rules 18 5.5.2 Data rate and wavelength 19 5.6 Magnetization 19 5.6.1 Polarity 19 5.6.2 Recorded equalization 19 5.6.3 Record level 19 6 Video interface 19 6.1 Encoding parameters 19 6.2 Parallel digital signal interfa
27、ce 19 7 Audio interface 19 7.1 Encoding parameters 19 7.1.1 Sampling 19 7.1.2 Reference level 20 7.2 Digital signal interface 20 8 Video processing 20 8.1 Recorded and non-recorded data 20 8.1.1 Recorded samples of digital active line and lines of the television frame 20 8.1.2 Non-recorded data 20 8
28、.1.3 Source pre-coding 20 Page 8.2 Channel distribution of samples 20 8.3 Shuffling 21 8.3.1 Introduction 21 8.3.2 Algebraic definition 21 8.4 Field data array 22 8.5 Outer error protection 22 8.6 Order of transmission to inner coding 23 9 Audio processing 23 9.1 Introduction 23 9.2 Source coding 23
29、 9.3 Source processing 24 9.3.1 Introduction 24 9.3.2 Relative audio-video timing 24 9.3.3 Audio data in fields 24 9.3.4 Intra-field shuffling 24 9.3.5 Block shuffling 25 9.3.6 Audio data word processing 26 9.4 Auxiliary words 26 9.4.1 Channel use (CHAN) 26 9.4.2 Pre-emphasis (PREF) 27 9.4.3 Audio d
30、ata word mode (LNGH) 28 9.4.4 Block sync location (S MARK) 28 9.4.5 Field number count (FNCT) for525/60 system 29 9.4.6 Edit flag (EFLG) 29 9.5 Outer error protection 29 9.6 Inner protection 30 9.7 Order of transmission to inner coding 30 9.8 Channel code 30 9.9 Allocation of audio sectors 30 10 Lon
31、gitudinal tracks 30 10.1 Relative timing 30 10.1.1 Time and control code input 30 10.1.2 Time and control code information 30 10.1.3 Cue information 31 10.1.4 Control track servo pulse 31 10.2 Control track 31 10.2.1 Method of recording 31 10.2.2 Servo reference pulse 31 10.2.3 Flux polarity 31 10.2
32、.4 Flux level 31 10.2.5 Pulse width 31 10.2.6 Servo reference pulse timing 31 10.2.7 Colour frame pulse 31 10.2.8 Video frame pulse 31EN61327:1995 BSI 01-2000 4 Page 10.3 Cue record 31 10.3.1 Method of recording 31 10.3.2 Flux level 31 10.4 Time and control code record 31 10.4.1 Method of recording
33、31 10.4.2 Flux level 32 10.4.3 Input signal 32 Annex A (normative) Cross-tape track measurement technique 115 Annex B (normative) Track pattern duringinsertediting 118 Annex C (informative) Bibliography 118 Annex ZA (normative) Normative referencestointernational publications withtheircorresponding
34、European publications 119 Figure 1 Record block diagram 32 Figure 2 Playback block diagram 33 Figure 3 Top view, inner structure and tapepathof S cassette 34 Figure 4 Top view, inner structure and tapepathof M cassette 35 Figure 5 Top view, inner structure and tapepathof L cassette 36 Figure 6 Datum
35、 area, support area and changergrip area of S cassette 37 Figure 7 Datum area, support area and changergrip area of M cassette 38 Figure 8 Datum area, support area and changergrip area of L cassette 39 Figure 9 Bottom view of S cassette 40 Figure 10 Bottom view of M cassette 41 Figure 11 Bottom view
36、 of L cassette 42 Figure 12 Light path of S cassette 43 Figure 13 Light path of M cassette 44 Figure 14 Light path of L cassette 45 Figure 15 Cassette positioning surface of S cassette 46 Figure 16 Cassette positioning surface ofMcassette 46 Figure 17 Cassette positioning surface ofLcassette 47 Figu
37、re 18 Top and side view of S cassette 48 Figure 19 Top and side view of M cassette 49 Figure 20 Top and side view of L cassette 50 Figure 21 S cassette coding holes and userholes 51 Page Figure 22 M cassette coding holes and userholes 52 Figure 23 L cassette coding holes and userholes 53 Figure 24 V
38、ideo cassette reel of30mm hubofScassette 54 Figure 25 Video cassette reel of30mm hub of M cassette 55 Figure 26 Video cassette reel of50mm hub of S cassette 56 Figure 27 Video cassette reel of50mm hub of M cassette 57 Figure 28 Video cassette reel of L cassette 58 Figure 29 Relationship between reel
39、 and large reel table of S and M cassettes 59 Figure 30 Relationship between reel and small reel table of S and M cassettes 60 Figure 31 Relationship between reel and reel table of L cassette 61 Figure 32 Reel lock and release of S, M and L cassettes 62 Figure 33 Lid lock and release of S cassette 6
40、3 Figure 34 Lid lock and release of M cassette 64 Figure 35 Lid lock and release of L cassette 65 Figure 36 Opening and closing area at inner door of S, M and L cassettes 66 Figure 37 Opening and closing area at outer door of S cassette 67 Figure 38 Opening and closing area at outer door of M casset
41、te 68 Figure 39 Opening and closing area at outer door of L cassette 69 Figure 40 Minimum space of S, M and L cassettes for VTR loading mechanism 70 Figure 41 Lid structure of S, M and L cassettes 71 Figure 42 Location and dimensions of recorded tracks 72 Figure 43 Location of cue, time and control
42、code and control track record 73 Figure 44 Location and dimensions of tolerance zones of helical track record(525/60 system) 76 Figure 45 Location and dimensions of tolerance zones of helical track record(625/50 system) 77 Figure 46 A possible scanner configuration(525/60 system) 78 Figure 47 A poss
43、ible scanner configuration(625/50 system) 79EN61327:1995 BSI 01-2000 5 Page Figure 48 A possible longitudinal head location and tape wrap(525/60 system) 81 Figure 49 A possible longitudinal head location and tape wrap(625/50 system) 82 Figure 50 Sector arrangement onhelical track(525/60 system) 83 F
44、igure 51 Sector arrangement on helical track(625/50 system) 83 Figure 52 Sync block format(525/60 system) 84 Figure 53 Sync block format(625/50 system) 84 Figure 54 Sync block identification format(525/60 system) 85 Figure 55 Sync block identification format(625/50 system) 86 Figure 56 Sync block nu
45、mber(525/60system) 87 Figure 57 Sync block number(625/50 system) 88 Figure 58 Sector preamble and postamble 89 Figure 59 Channel distribution of samples(525/60 system) 99 Figure 60 Channel distribution of samples(625/50 system) 100 Figure 61 Track, segment and field numbers(525/60 system) 101 Figure
46、 62 Track, segment and field numbers(625/50 system) 101 Figure 63 Video field data array(525/60 system) 102 Figure 64 Video field data array(625/50 system) 103 Figure 65 Audio data block field array(525/60 system) 104 Figure 66 Audio data block field array(625/50 system) 105 Figure 67 Audio data blo
47、ck layout(525/60 system) 107 Figure 68 Audio data block layout(625/50 system) 108 Figure 69 Audio data block arrangement inapairof sectors(525/60 system) 109 Figure 70 Audio data block arrangement in a pair of sectors(625/50 system) 109 Figure 71 Digital audio word to byte conversion(525/60 system)
48、110 Figure 72 Digital audio word to byte conversion(625/50 system) 110 Page Figure 73 Audio data block auxiliary data(525/60 system) 111 Figure 74 Audio data block auxiliary data(625/50 system) 112 Figure 75 Audio channel arrangement(525/60 system) 113 Figure 76 Audio channel arrangement(625/50 syst
49、em) 113 Figure 77 Recorded control track waveform timing(525/60 system) 114 Figure 78 Recorded control track waveform timing(625/50 system) 114 Figure A.1 Cross-tape measurement technique 116 Figure A.2 Correction factors (actual tape travel, tension) 117 Figure A.3 Track location error plot (example) 117 Figure B.1 A typical track pattern during insert editing 118 Table 1 Mechanical tolera
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