1、BRITISH STANDARD BS EN 61179:1993 IEC1179:1993 Specification for Helical-scan digital composite video cassette recording system using19mm magnetic tape, format D2 (NTSC, PAL, PAL-M) The European Standard EN61179:1993 has the status of a BritishStandard UDC 621.397.43BSEN61179:1993 This BritishStanda
2、rd, having been prepared under the directionof the Electronic Equipment Standards Policy Committee, was published underthe authority of the Standards Board and comesintoeffect on 15December1993 BSI02-2000 The following BSI references relate to the work on this standard: Committee reference EEL/22 Dr
3、aft for comment89/26534 DC ISBN 0 580 22631 X Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision this European Standard was prepared, comprises the national committees of the following countries: Austria Italy Belgium Luxembourg D
4、enmark Netherlands Finland Norway France Portugal Germany Spain Greece Sweden Iceland Switzerland Ireland United Kingdom Amendments issued since publication Amd. No. Date CommentsBSEN61179:1993 BSI 02-2000 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 T
5、ext of EN61179 5 National annex NA (informative) Committees responsible Inside back cover National annex NB (informative) Cross-references Inside back coverBSEN61179:1993 ii BSI 02-2000 National foreword This BritishStandard has been prepared under the direction of the Electronic Equipment Standards
6、 Policy Committee and is the English language version of EN61179:1993 Helical-scan digital composite video cassette recording system using19mm magnetic tape, format D2 (NTSC, PAL, PAL-M), published by the European Committee for Electrotechnical Standardization (CENELEC). It is identical with IEC1179
7、:1993 published by the International Electrotechnical Commission (IEC). Copies of International Radio Consultative Committee (CCIR), International Telegraph and Telephone Consultative Committee (CCITT) and Institute of Electrical and Electronic Engineers (IEEE) documents may be purchased from BSI St
8、andards, Linford Wood, Milton Keynes, MK146LE A 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 obligati
9、ons. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages2 to102, 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 amend
10、ment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN61179 August1993 UDC 621.397.43 Descriptors: Recording apparatus, digital recording, video tape recorders, chrominance, cassette for magnetic tapes, magnetic tapes, digital signals, video signals, acoustic signa
11、ls, recording track, electric properties, mechanical properties, interchangeability, dimensions, recording characteristics English version Helical-scan digital composite video cassette recording system using19mm magnetic tape, format D2 (NTSC,PAL, PAL-M) (IEC1179:1993) Systme de magntoscope numrique
12、 chrominance composite cassette balayage hlicodal utilisant la bande magntique de19mm, format D2 (NTSC, PAL, PAL-M) (CEI1179:1993) Videokassettensystem mit Schrgspuraufzeichnung digitaler Composite-Signale auf Magnetband19mm, D2-Format (NTSC, PAL, PAL-M) (IEC1179:1993) This European Standard was app
13、roved by CENELEC on1993-07-06. 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 nati
14、onal 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 made by translation under the responsibility of a CENELEC member into its own languag
15、e 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, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Swit
16、zerland 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 1993 Copyright reserved to CENELEC members Ref. No. EN
17、61179:1993 EEN61179:1993 BSI 02-2000 2 Foreword The text of document60B (CO)144, as prepared by Sub-Committee60B: Video recording, of IEC Technical Committee60: Recording, was submitted to the IEC-CENELEC parallel vote in March1992. The reference document was approved by CENELEC as EN61179 on6 July1
18、993. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. Annexes designated “informative” are given only for information. In this standard, Annex A, Annex B and Annex ZA are normative and Annex C is informative. Contents Page Foreword 2 Introduction 5
19、 Section 1. General 1.1 Scope 7 1.2 Normative references 7 1.3 Definitions, symbols and abbreviations 7 1.4 Environment and test conditions, reference tape and calibration tape 8 Section 2. Videotape-cassette 2.1 Mechanical parameters 9 2.2 Videotape specification 32 Section 3. Helical recordings 3.
20、1 Tape speed 36 3.2 Record location and dimensions 36 3.3 Helical track record curvature, tolerance zones, centre lines 40 3.4 Relative positions of recorded signals 41 3.5 Gap azimuth 41 3.6 Transport and scanner 42 Section 4. Program track data arrangement 4.1 Introduction 47 4.2 Labelling convent
21、ion 47 4.3 Sector details 48 4.4 Edit gaps 55 4.5 Channel code 55 Section 5. Video interface 5.1 Encoding parameters 57 5.2 Parallel digital signal interface 64 5.3 Serial digital signal interface 68 Section 6. Audio interface 6.1 Encoding parameters 69 6.2 Digital signal interface 69 Section 7. Vid
22、eo processing 7.1 Recorded data 74 7.2 Intersector distribution 74 7.3 Intrasector shuffling 74 7.4 Sector array 79 7.5 Outer code error protection 79 Section 8. Audio processing 8.1 Introduction 82 8.2 Source coding 82 8.3 Source processing 85 8.4 Auxiliary words 87 8.5 Outer error protection 92 la
23、test date of publication ofan identical national standard (dop)1994-07-01 latest date of withdrawal ofconflicting national standards (dow)1994-07-01EN61179:1993 BSI 02-2000 3 Page 8.6 Inner protection and channel coding 92 8.7 Order of transmission to inner coding 93 8.8 Order of audio sectors 93 Se
24、ction 9. Longitudinal tracks 9.1 General 94 9.2 Relative timing 94 9.3 Control track 94 9.4 Cue record 95 9.5 Time code record 95 Annex A (normative) Audio levels 97 Annex B (normative) Cross-tape track measurement technique 97 Annex C (informative) Examples of error correcting codes 100 Annex ZA (n
25、ormative) Other international publications quoted in this standard with the references of the relevant European publications 102 Figure 1 Record block diagram 5 Figure 2 Playback block diagram 6 Figure 3 Top view, inner structure and tape path of the S cassette 10 Figure 4 Top view, inner structure
26、and tape path of the M cassette 11 Figure 5 Top view, inner structure and tape path of the L cassette 12 Figure 6 Datum area, support area and holding area of the S cassette 13 Figure 7 Datum area, support area and holding area of M cassette 14 Figure 8 Datum area, support area and holding area of L
27、 cassette 15 Figure 9 Bottom view of S cassette 16 Figure 10 Bottom view of M cassette 17 Figure 11 Bottom view of L cassette 18 Figure 12 Top and side view of S cassette 19 Figure 13 Top and side view of M cassette 20 Figure 14 Top and side view of L cassette 21 Figure 15 S cassette coding holes an
28、d user holes 23 Figure 16 M cassette coding holes and user holes 24 Figure 17 L cassette coding holes and user holes 25 Page Figure 18 Video cassette reel 27 Figure 19 Relationship between reel and reel table 28 Figure 20 S cassette reel lock and release 29 Figure 21 M cassette reel lock and release
29、 30 Figure 22 L cassette reel lock and release 31 Figure 23 Lid lock and release 33 Figure 24 Minimum space for VTR loading mechanism 34 Figure 25 Lid structure 35 Figure 26 Location and dimensions of recorded tracks 37 Figure 27 Location of cue, time code and control track record 38 Figure 28 Locat
30、ion and dimensions of tolerance zones of helical track record 41 Figure 29 Permissible scanner configuration 43 Figure 30 Permissible longitudinal head location and tape wrap of525/60 systems 45 Figure 31 Permissible longitudinal head location and tape wrap of625/50 systems 46 Figure 32 Sector arran
31、gement on helical track for NTSC and PAL-M 47 Figure 33 Sector arrangement on helical track for PAL 48 Figure 34 Sync block format for NTSC and PAL-M 48 Figure 35 Sync block format for PAL 49 Figure 36 Sync block identification format 51 Figure 37 Sync block ID number for NTSC and PAL-M 52 Figure 38
32、 Sync block ID number for PAL 52 Figure 39 Sector preamble and postamble 55 Figure 40 Relationship between analog IRE units and digital data words for NTSC 57 Figure 41 Horizontal sync relationship in NTSC 60 Figure 42 Horizontal sync relationship in PAL-M 61EN61179:1993 BSI 02-2000 4 Page Figure 43
33、 Horizontal sync relationship in PAL 62 Figure 44 Location and magnitude of samples during horizontal blanking region in NTSC 63 Figure 45 Location and magnitude of samples during horizontal blanking region in PAL-M 63 Figure 46 Location and magnitude of samples during horizontal blanking region in
34、PAL 64 Figure 47 Parallel digital interface balanced circuit 66 Figure 48 Parallel digital video interface clock waveform 68 Figure 49 Digital audio parallel interface bit assignment 71 Figure 50 Parallel digital audio interface clock waveform 72 Figure 51 Parallel digital audio interface synchroniz
35、ation 73 Figure 52 Channel distribution samples for NTSC and PAL-M 75 Figure 53 Channel distribution samples for PAL 76 Figure 54 Track, segment and field numbers for NTSC and PAL-M 77 Figure 55 Track, segment and field numbers for PAL 77 Figure 56 Video sector array for NTSC and PAL-M 80 Figure 57
36、Video sector array for PAL 81 Figure 58 Audio data block layout for NTSC and PAL-M 83 Figure 59 Audio data block layout for PAL 84 Figure 60 Video and audio sectors of one segment 86 Figure 61 Digital audio word to byte conversion 88 Figure 62 Audio data block auxiliary data for NTSC and PAL-M 88 Fi
37、gure 63 Audio data block auxiliary data for PAL 89 Figure 64 Audio edit sequence 93 Figure 65 Recorded control record waveform timing 96 Figure B.1 Measurement of ferrofluid tapedevelopment 98 Figure B.2 Correction for tape tension 98 Page Figure B.3 Calculation of the track location error 99 Figure
38、 B.4 Example plot of track location errorversus track number 100 Table 1 Mechanical tolerances 9 Table 2 Tape length and play time of S, M, L cassettes 9 Table 3 Reel spring force 26 Table 4 Record location and dimensions for525/60 systems 39 Table 5 Record location and dimensions for625/50 systems
39、40 Table 6 Scanner design parameters 44 Table 7 Data rate and wavelength 56 Table 8 Video encoding parameters 57 Table 9 Connector contact assignments 67 Table 10 Connector contact assignments 70 Table 11 Status data (byte0) 85 Table 12 Status data (byte1) 85 Table 13 Audio data word mode 87 Table 1
40、4 Channel use control word 90 Table 15 Pre-emphasis control word 90 Table 16 Word mode control word 91 Table 17 BCNT Mode 92 Table C.1 Inner code for NTSC and PAL-M 100 Table C.2 Inner code for PAL 100 Table C.3 Video outer code for NTSC and PAL-M 101 Table C.4 Video outer code for PAL 101 Table C.5
41、 Audio outer code for NTSC, PAL-M and PAL 101EN61179:1993 BSI 02-2000 5 Introduction The purpose of InternationalStandard IEC1179 is to define the electrical and mechanical characteristics of equipment which permits the interchangeability of19mm cassettes containing digitally recorded composite vide
42、o programs. The requirements given relate to525-line composite TV signals (NTSC, PAL-M) with a frame frequency of29,97Hz nominal, and to625-line composite TV signals (PAL) with a frame frequency of25Hz. One video channel and four independent audio channels are recorded in a digital format. The video
43、 signal may be input or output in either analog or digital format. The audio signals may also be input or output in either analog or digital format. In addition, a cue audio signal is recorded in analog format. Figure 1 and Figure 2 show a block diagram of the processes involved in the recorder. Fig
44、ure 1 Record block diagramEN61179:1993 6 BSI 02-2000 Figure 2 Playback block diagramEN61179:1993 BSI 02-2000 7 Section 1. General 1.1 Scope This International Standard specifies the content, format and recording method of the data blocks forming the helical records on the tape containing video, audi
45、o and associated data using the19mm type D-2 cassette. In addition, this standard specifies the content, format and recording method of the longitudinal record containing tracking information for the scanning head associated with the helical records. 1.2 Normative references The following normative
46、documents contain provisions which, through reference in this text, constitute provisions of this International 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
47、encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC461:1986, Time and control code for videotape recorders. IEC735:1991, Measuring methods
48、for videotape properties. IEC958:1989, Digital audio interface. CCIR VolumeX1 Part1 Section11A Rapport624-3:1986, Characteristics of television systems. CCITT Blue book, VolumeIII FascicleIII.4 Recommendation J.15:1988, Lining-up and monitoring an international sound-programme connection. CCITT Blue
49、 book, VolumeIII FascicleIII.6 Recommendation J.17:1988, Pre-emphasis used on sound-programme circuits. IEEE Standard1952:1953, Volume measurements of electrical speech and program waves. ISO2110:1989, Information technology Data communication25-pole DTE/DCE interface connector and contact number assignments. 1.3 Definitions, symbols and abbreviations For the p
