1、BRITISH STANDARD BS EN 61835:1998 IEC 61835: 1998 Helical-scan digital component video cassette recording system using 12,65mm (0,5in) magnetic tape Format D-5 The European Standard EN61835:1998 has the status of a British Standard ICS 33.160.40BSEN61835:1998 This British Standard, having been prepa
2、red under the directionof the ElectrotechnicalSector Committee, was published underthe authority of the Standards Committee and comesinto effect on 15 December 1998 BSI 06-1999 ISBN 0 580 30860 X National foreword This British Standard is the English language version of EN61835:1998. It is identical
3、 with IEC61835:1998. The UK participation in its preparation was entrusted by Technical Committee EPL/100, Audio, Video and Multimedia Systems and Equipment, to Subcommittee EPL/100/2, Recording, which has the responsibility to: aid enquirers to understand the text; present to the responsible intern
4、ational/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 organizations represented on this committee can be obtained on request to its
5、secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC27-1 has been renumbered as IEC60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cro
6、ss-references Attention is drawn to the fact that CEN and CENELEC standards normally include an annex which lists normative references to international publications with their corresponding European publications. The British Standards which implement these international or European publications may
7、be found in the BSI Standards Catalogue under the section entitled “International Standards 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 St
8、andards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages 2 to 128, an inside back cover a
9、nd 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. Amendments issued since publication Amd. No. Date CommentsBSEN61835:1998 BSI 06-1999 i Contents Page National forewo
10、rd Inside front cover Foreword 2 Text of EN 61835 7ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61835 October 1998 ICS 33.160.40 Descriptors: Recording apparatus, digital recording, magnetoscopes, cassettes for magnetic tapes, magnetic tapes, dimensions, recording characteristics, da
11、ta blocks, recording tracks, codification, video signals, acoustic signals, electrical properties, mechanical properties, interchangeability English version Helican-scan digital component video cassette recording system using 12,65mm (0,5in) magnetic tape Format D-5 (IEC 61835:1998) Systme de magnto
12、scope numrique composantes cassette balayage hlicodalsur bande magntique de 12,65 mm (0,5 in) Format D-5 (CEI 61835:1998) Videokassettensystem mit Schrgspuraufzeichnung digitaler Komponenten-Signale auf Magnetband12,65mm (0,5in) D5-Format (IEC61835:1998) This European Standard was approved by CENELE
13、C on 1998-10-01. 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 standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards
14、 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 made by translation under the responsibility of a CENELEC member into its own language and notified
15、 to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Sw
16、itzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1998 CENELEC All rights of exploitation in any form
17、and by any means reserved worldwide for CENELEC members. Ref. No. EN 61835:1998 EEN61835:1998 BSI 06-1999 2 Foreword The text of document 100B/166/FDIS, future edition1 of IEC61835, prepared by SC100B, Recording, of IEC TC100, Audio, video and multimedia systems and equipment, was submitted to the I
18、EC-CENELEC parallel vote and was approved by CENELEC as EN61835 on 1998-10-01. 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, Annex C and Annex ZA
19、 are normative and Annex D, Annex E and Annex F are informative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC61835:1998 was approved by CENELEC as a European Standard without any modification. In the official version, for Annex F, Bibliography, th
20、e following notes have to be added for the standards indicated: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 1999-07-01 latest date by which the national standards conflicting with the EN have to be withd
21、rawn (dow) 2001-07-01 IEC 60735 NOTEHarmonized as EN 60735:1991 (not modified). IEC 61327 NOTEHarmonized as EN 61327:1995 (not modified).EN61835:1998 BSI 06-1999 3 Contents Page Foreword 2 Introduction 7 1 General 7 1.1 Scope 7 1.2 Normative references 7 1.3 Definitions, symbols and abbreviations 7
22、1.4 Environment and test conditions 8 1.5 Reference tape 8 1.6 Calibration tape 8 1.6.1 Record locations and dimensions 8 1.6.2 Calibration signals 8 1.6.3 Purchase 8 2 Video tape cassette 9 2.1 Mechanical parametres 9 2.1.1 Cassette dimensions 9 2.1.2 Identification of cassettes 9 2.1.3 Tape length
23、, thickness and play time 9 2.1.4 Coating face 9 2.1.5 Datum planes 9 2.1.6 Window and labels 10 2.1.7 Identification holes 10 2.1.8 Leader/trailer tape 10 2.1.9 Reels 11 2.1.10 Lid 11 2.2 Video tape specification 11 2.2.1 Base 11 2.2.2 Width 11 2.2.3 Width fluctuation 11 2.2.4 Tape thickness 11 2.2
24、.5 Transmissivity 12 2.2.6 Offset yield strength 12 2.2.7 Magnetic coating 12 2.2.8 Coating coercivity 12 2.2.9 Particle orientation 12 3 Helical recordings 12 3.1 Tape speed 12 3.2 Record location and dimensions 12 3.2.1 Erasure 12 3.2.2 Record location and dimensions 12 3.2.3 Reference edge 12 3.2
25、.4 Track pitch 12 3.2.5 Flying erasure 12 3.3 Helical track record tolerance zones 12 Page 3.4 Relative positions of recorded information 13 3.4.1 Relative positions of the longitudinal tracks 13 3.4.2 Programme area reference point 13 3.5 Gap azimuth 13 3.5.1 Cue track, control track, time and cont
26、rol code track 13 3.5.2 Helical track 13 3.6 Transport and scanner 13 4 Programme track data arrangement 13 4.1 Introduction 13 4.2 Labeling convention 14 4.3 Sector details 14 4.3.1 Sync block 14 4.3.2 Sync pattern 14 4.3.3 Identification pattern 14 4.3.4 Data field 15 4.3.5 Sector preamble 16 4.3.
27、6 Sector postamble (P) 17 4.4 Edit gaps 17 4.5 Channel coding 17 4.5.1 Coding rules 17 4.5.2 Data rate and wavelength 18 4.6 Magnetization 18 4.6.1 Polarity 18 4.6.2 Recorded equalization 18 4.6.3 Record level 18 5 Video interface 18 6 Audio interface 19 6.1 Encoding parameters 19 6.1.1 Sampling 19
28、6.1.2 Reference level 19 6.2 Digital signal interface 19 7 Video processing 19 7.1 Introduction 19 7.2 Recorded data 19 7.2.1 Recorded samples and lines of the television frame 19 7.2.2 Non-recorded data 20 7.2.3 Source precoding 20 7.3 Luminance separation and video reserve data 20 7.4 Channel and
29、video block distribution 20 7.5 10/8 bit arrangement 21 7.6 Video randomization 23EN61835:1998 4 BSI 06-1999 Page 7.7 Outer error protection 23 7.8 Field data array 24 7.9 Order of transmission to inner coding 24 8 Audio processing 25 8.1 Introduction 25 8.2 Source coding 25 8.3 Source processing 25
30、 8.3.1 Introduction 25 8.3.2 Relative audio-video timing 26 8.3.3 Audio data in fields 26 8.3.4 Intra-field shuffling 26 8.3.5 Block shuffling 26 8.3.6 Audio data word processing 27 8.4 Auxiliary words 28 8.4.1 Channel use (CHAN) 28 8.4.2 Pre-emphasis (PREF) 28 8.4.3 Audio data word mode (LNGH) 29 8
31、.4.4 Block sync location (S MARK) 29 8.4.5 Field number count (FNCT) for 525/60 system 29 8.4.6 Edit flag (EFLG) 30 8.5 Outer error protection 30 8.6 Inner protection 31 8.7 Order of transmission to inner coding 31 8.8 Channel coding 31 8.9 Allocation of audio sectors 31 9 Longitudinal tracks 31 9.1
32、 Relative timing 31 9.1.1 Time and control code input 31 9.1.2 Time and control code information 31 9.1.3 Cue information 31 9.1.4 Control track servo pulse 31 9.2 Control track 31 9.2.1 Method of recording 31 9.2.2 Servo reference pulse 32 9.2.3 Flux polarity 32 9.2.4 Flux level 32 9.2.5 Pulse widt
33、h 32 9.2.6 Servo reference pulse timing 32 9.2.7 Colour frame pulse 32 9.2.8 Video frame pulse 32 9.3 Cue record 32 9.3.1 Method of recording 32 9.3.2 Flux level 32 9.4 Time and control code record 32 Page 9.4.1 Method of recording 32 9.4.2 Flux level 32 9.4.3 Input signal 32 Annex A (normative) Tap
34、e tension 115 Annex B (normative) Cross-tape track measurement technique 115 Annex C (normative) Track pattern during insert editing 118 Annex D (informative) Video signal processing 118 Annex E (informative) Manufacturer 128 Annex F (informative) Bibliography Inside back cover Annex ZA (normative)
35、Normative references tointernational publications with their corresponding European publications Inside back cover Figure 1 Record block diagram 33 Figure 2 Playback block diagram 33 Figure 3 Top view, inner structure and tape path of S cassette (for reference only) 34 Figure 4 Top view, inner struc
36、ture and tape path of M cassette (for reference only) 35 Figure 5 Top view, inner structure and tape path of L cassette (for reference only) 36 Figure 6 Datum area, support area and changer grip area of S cassette 37 Figure 7 Datum area, support area and changer grip area of M cassette 38 Figure 8 D
37、atum area, support area and changer grip area of L cassette 39 Figure 9 Bottom view of S cassette 39 Figure 10 Bottom view of M cassette 41 Figure 11 Bottom view 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
38、15 Cassette positioning surface of S cassette 45 Figure 16 Cassette positioning surface of M cassette 46 Figure 17 Cassette positioning surface of Lcassette 46 Figure 18 Top and side view of S cassette 47 Figure 19 Top and side view of M cassette 48 Figure 20 Top and side view of L cassette 49EN6183
39、5:1998 BSI 06-1999 5 Page Figure 21 S cassette coding holes and user holes 50 Figure 22 M cassette coding holes and user holes 51 Figure 23 L cassette coding holes and user holes 52 Figure 24 Video cassette reel of 30 mm hub of S cassette 53 Figure 25 Video cassette reel of 30 mm hub of M cassette 5
40、4 Figure 26 Video cassette reel of 50 mm hub of S cassette 55 Figure 27 Video cassette reel of 50 mm hub of M cassette 56 Figure 28 Video cassette reel of L cassette 57 Figure 29 Relationship between reel and large reel table of S and M cassettes 58 Figure 30 Relationship between reel and small reel
41、 table of S and M cassettes 59 Figure 31 Relationship between reel and reel table of L cassette 60 Figure 32 Reel lock and release of S, M and L cassettes 61 Figure 33 Lid lock and release of S cassette 62 Figure 34 Lid lock and release of M cassette 63 Figure 35 Lid lock and release of L cassette 6
42、4 Figure 36 Opening and closing area at inner door of S, M and L cassettes 65 Figure 37 Opening and closing area at outer door of S cassette 66 Figure 38 Opening and closing area at outer door of M cassette 67 Figure 39 Opening and closing area at outer door of L cassette 68 Figure 40 Minimum space
43、of S, M and L cassettes for VTR loading mechanism 69 Figure 41 Lid structure of S, M and L cassettes 70 Figure 42 Location and dimensions of recorded tracks 71 Figure 43 Location of cue, time and control code track record 72 Figure 44 Location and dimensions of tolerance zones of helical track recor
44、d 75 Page Figure 45 A possible scanner configuration (525/60 system) 76 Figure 46 A possible scanner configuration (625/50 system) 77 Figure 47 A possible longitudinal head location and tape wrap (525/60 system) 79 Figure 48 A possible longitudinal head location and tape wrap (625/50 system) 80 Figu
45、re 49 Sector arrangement on helical track 81 Figure 50 Sync block format (525/60 system) 81 Figure 51 Sync block format (625/50 system) 82 Figure 52 Sync block identification format (525/60 system) 83 Figure 53 Sync block identification format (625/50 system) 84 Figure 54 Sync block number 85 Figure
46、 55 Preamble and postamble 85 Figure 56 Track, segment and field numbers (525/60 system) 97 Figure 57 Track, segment and field numbers (625/50 system) 97 Figure 58 Separated luminance and colour difference samples (525/60 system) 98 Figure 59 Separated luminance and colour difference samples (625/50
47、 system) 98 Figure 60 Channel and video block distribution (525/60 system) 99 Figure 61 Channel and video block distribution (625/50 system) 99 Figure 62 10/8 bit arrangement (525/60 system) 100 Figure 63 10/8 bit arrangement (625/50 system) 101 Figure 64 Field data array (525/60 system) 102 Figure
48、65 Field data array (625/50 system) 103 Figure 66 Audio data block field array (525/60 system) 104 Figure 67 Audio data block field array (625/50 system) 105 Figure 68 Audio data block layout (525/60 system) 107 Figure 69 Audio data block layout (625/50 system) 108EN61835:1998 6 BSI 06-1999 Page Fig
49、ure 70 Audio data block arrangement (525/60 system) 109 Figure 71 Audio data block arrangement (625/50 system) 109 Figure 72 Digital audio word to byte conversion (525/60 system) 110 Figure 73 Digital audio word to byte conversion (625/50 system) 110 Figure 74 Audio data block auxiliary data (525/60 system) 111 Figure 75 Audio data block auxiliary data (625/50 system) 112 Figure 76 Audio ch
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