1、BRITISH STANDARD Helical-scan digital component video cassette recording system using 12,65 mm (0,5 in) magnetic tape - Format D-5 The European Stanard EN 618351998 has the status of a British standard ICs 33.100.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 61835:1
2、998 IEC 61835:1998 STDmBSI BS EN bL835-ENGL 1998 = LbZLibb9 074b332 773 = BS EN 61836:1998 been prepared under the direction of the Electrotechnicai Amd. No. Date Sector Committee, was published under the authority of the Standards Committee and comes into effect on 16 December 1998 O BSI 1998 ISBN
3、O 080 30860 X National foreword Text affected This British Standard is the English language version of EN 61835:1998. It is identical with IEC 61835 1998. The UK participation in its preparation was entxusted by Technical Committee EPI.l00, Audio, Video and Multimedia systems and Equipment, to Subco
4、mmittee EPIJ100/2, Recording, which has the responsibfity to: - aid enquirem to understand the text; - present to the responsible internationallEuropean committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; - monitor related international and Eur
5、opean developments and promulgate them in the UK A iist of organizations represented on this committee can be obtajned on request to its secretary. Rom 1 January 1997, all IEC publications have the number 60000 added b the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a
6、period of time during the change over from one numbering system to the other, publications may contain identifie= from both systems. Cross-references Attention is drawn to the fact that CEN and CENELEC standards normally include an annex which lists normative references to international publications
7、 with their corresponding European publications. The British Standards which implement these internalional or European publications may be found in the BSI Standards Catalogue under the section entitled “inkrnational Standards Correspondence Index“, or by using the “Find“ facility of the BSI Standar
8、ds Electronic Catalogue. A British !Ibndard does not purport to include all the necessary provisions of a contract. Usem of British standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legai obligations. Summary of pages
9、This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 149, and a back cover. STD-BSI BS EN bL835-ENGL 1798 Lb24bb7 074b333 bOT = EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61835 October 1998 ICs 33.160.40 Descriptors: Recording apparatus, digital recor
10、ding, magnetoscopes, cassettes for magnetic tapes, magnetic tapes, dimensions, recording characteristics, data blocks, recording tracks, codification, video signals, acoustic signals, electrical properties. mechanical properties. interchangeability English version Helican-scan digital component vide
11、o cassette recording system using 12,65 mm (085 in) magnetic tape - Format 0-5 (IEC 6 i 835: 1 998) Systme de magntoscope numrique composantes cassette balayage hlicodal sur bande magntique de 12,65 mm (0,5 in) - Format 0-5 (CE1 61 835: 1998) Video kassettensystem mit Schrgspuraufzeichnung digitaler
12、 Komponenten-Signale auf Magnetband 12,65 mm (0,5 in) - 05-Format (IEC 61 835:1998) This European Standard was approved by CENELEC on 1998-10-01. CENELEC members are bound to comply with the CENICENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status
13、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 exists in three official versions (English, French, German). A
14、version in any 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, Czech Republic,
15、 Denmark, Finland, France, Germany, Greece, Iceland, 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 Elektr
16、otechnische Normung Central Secretariat: rue de Starsart 35, B - 1050 Brussels 1998 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61835:1998 E Foreword The text of document 100B/166/FDIS, future edition 1 of IEC 61 835, prepared
17、 by SC 1 OOB, Recording, of IEC TC 100, Audio, video and multimedia systems and equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61 835 on 1998-1 0-01. The following dates were fixed: - latest date by which the EN has to be implemented at national level by
18、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 withdrawn (dow) 2001 -07-01 Annexes designated “normative“ are part of the body of the standard. Annexes designated “informative“ are give
19、n for information only. In this standard, annexes A, 8, C and ZA are normative and annexes D, E and F are informative. Annex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC 61835:1998 was approved by CENELEC as a European Standard without any modification.
20、 In the official version, for annex F, Bibliography, the following notes have to be added for the standards indicated: IEC 60735 NOTE: Harmonized as EN 60735:1991 (not modified). IEC 61 327 NOTE: Harmonized as EN 61 327: 1995 (not modified). STDOBSI BS EN bL835-ENGL 1998 I lb24bb7 074b335 482 I Page
21、 3 EN 61835:1998 CONTENTS Pages 7 INTRODUCTION . Clause 1 General . 1.1 Scope 1.2 Normative references . 1.3 Definitions. symbols and abbreviations . 1.4 Environment and test conditions . 1.5 Reference tape 1.6 Calibration tape 1.6.1 Record locations and dimensions . 1.6.2 Calibration signais 1.6.3
22、Purchase 2 Video tape cassette . 2.1 Mechanical parametres 2.1.1 Cassette dimensions 2.1.2 Identification of cassettes . 2.1.3 2.1.4 Coating face . 2.1.5 Datum planes . 2.1.6 Window and labels . 2.1.7 Identification holes . 2.1.8 Leaderhailer tape 2.1.9 Reels . Tape length. thickness and play time 2
23、.1.10 Lid . 2.2 Video tape specification . 2.2.1 Base 2.2.2 Width . 2.2.3 Width fluctuation 2.2.4 Tape thickness . 2.2.5 Transmissivity 2.2.6 Offset yield strength . 2.2.7 Magnetic coating 2.2.8 Coating coercivity . 2.2.9 Particle orientation . 8 8 9 9 10 10 10 10 10 a 10 10 11 11 11 11 11 12 12 13
24、13 14 14 14 14 15 15 15 15 15 15 15 3 Helical recordings . 15 3.1 Tape speed 15 O BSI 1998 _ I STD-BSI BS EN bL835-ENGL 1798 lb24bb7 Ci7qb33b 317 Page 4 1 EN 61836:1998 Clause 3.2 Record location and dimensions . 3.2.1 Erasure 3.2.2 Record location and dimensions . 3.2.3 Reference edge : . 3.2.4 Tra
25、ck pitch . 3.2.5 Flying erasure Helical track record tolerance zones . Relative positions of recorded information 3.4.1 Relative positions of the longitudinal tracks . 3.4.2 3.5 Gap azimuth 3.5.1 Cue track. control track, time and control code track . 3.3 3.4 Programme area reference point 3.5.2 Hel
26、ical track . 3.6 Transport and scanner . Pages 15 15 16 16 16 16 16 16 16 16 17 17 17 17 4 Programme track data arrangement 17 4.1 Introduction 17 4.2 Labeling convention 18 4.3 Sector details . 18 4.3.2 Sync pattern . 18 20 4.3.4 Data field . 20 4.3.5 Sector preamble . 4.3.6 Sector postamble (P) 21
27、 . 4.3.1 Sync block . 18 4.3.3 Identification pattern . 18 4.4 Edit gaps . 22 4.5 Channel coding 22 4.5.2 Data rate and wavelength . . 23 4.6.1 Polarity . 23 4.6.2 Recorded equalization 23 4.6.3 Record level . 23 4.5.1 Coding rules . 22 4.6 Magnetization . 23 5 Video interface 24 24 6 Audio interfac
28、e 6.1 Encoding parameters . 24 6.1 . 1 Sampling . 24 6.1.2 Reference level 24 6.2 Digital signal interface 24 7 Video processing . 24 7.1 Introduction 24 7.2.1 25 7.2.2 Non-recorded data . 26 7.2.3 Source precoding . 26 7.2 Recorded data . 25 Recorded samples and lines of the television frame O BSI
29、1998 STD*BSI BS EN bL35-ENGL 1778 M Lh24bb7 074b337 255 Page 5 EN 61835:1998 Clause Pages 7.3 Luminance separation and video reserve data 26 7.4 Channel and video block distribution 27 7.5 10/8 bit arrangement 28 7.6 Video randomization 30 7.7 Outer error protection . 30 7.9 Order of transmission to
30、 inner coding . 31 7.8 Field data array 30 8 Audio processing . 8.1 Introduction . 8.2 8.3 8.4 8.5 8.6 8.7 8.9 0.8 Source coding Source processing . .i 8.3.1 Introduction 8.3.2 Relative audio-video timing . 8.3.3 Audio data in fields . 8.3.4 Intra-field shuffling . 8.3.5 Block shuffling 8.3.6 Audio
31、data word processing Auxiliary words . 8.4.1 Channel use (CHAN) 8.4.2 Pre-emphasis (PREF) 8.4.3 Audio data word mode (LNGH) . 8.4.4 Block sync location (S MARK) 8.4.5 Field number count (FNCT) for 525/60 system 8.4.6 Edit flag (EFLG) . Outer error protection . Inner protection Order of transmission
32、to inner coding . Channel coding Allocation of audio sectors . 9 Longitudinal tracks 9.1 Relative timing . 9.1.1 Time and control code input . 9.1.2 Time and control code information 9.1.3 Cue information 9.1.4 Control track servo pulse Control track . - 9.2.1 Method of recording . 9.2.2 Servo refer
33、ence pulse 9.2.3 Flux polarity . 9.2.4 Flux level . 9.2.5 Pulse width 9.2.6 9.2.7 Colour frame pulse . 9.2.8 Video frame pulse 9.2 Servo reference pulse timing 32 32 32 33 33 33 33 33 34 34 35 36 36 37 37 38 38 38 39 39 39 39 40 40 40 40 40 40 40 40 40 40 40 41 41 41 41 O BSI 1998 Page 6 EN 61836:19
34、98 Clause 9.3 9.4 Pages 41 Cue record 9.3.1 Method of recording 41 9.3.2 Flux level .* . 41 Time and control code record 41 9.4.1 Method of recording . . . . 41 9.4.2 Fluxlevel .,. a . 41 9.4.3 Input signai 42 Figures . 42 to 128 Annex A (normative) Tape tension 129 Annex B (normative) Cross-tape tr
35、ack measurement technique . 130 Annex C (normative) Track pattern during insert editing 134 Annex D (informative) Video signal processing 135 Annex E (informative) Manufacturer ., 147 Annex F (informative) Bibliography . 148 Annex ZA Normative references to international publications with their corr
36、esponding European publications . . . . 149 O BSI 1998 STD-BSI BS EN bL35-ENGL 1998 Lb2i-lbb7 07Lib339 028 Page 7 EN 61835:1998 I NT RO D U CTIO N One video channel and four independent audio channels are recorded in a digital form. The video signal may be input and output in either analogue or digi
37、tal form. The audio signals may also be input and output in either analogue or digital form. In addition, a cue audio signal is recorded in analogue form. Figures 1 and 2 provide block diagrams of the processes involved in the recorder. STD-BSI BS EN bL835-ENGL 1778 W lb24bb9 074b340 84T = Page 8 EN
38、 61836:1998 HELICAL-SCAN DIGITAL COMPONENT VIDEO CASSETTE FORMAT D-5 RECORDING SYSTEM USING 12,65 mm (0,5 in) MAGNETIC TAPE - 1 General 1.1 Scope This International Standard defines the electrical and mechanical characteristics of equipment which permit the interchangeability of 12,65 mrn cassettes
39、containing digitally recorded component video programmes. It specifies the content, format and recording method of the data blocks forming the helical records on the tape containing video, audio and associated data using the 12,65 mm (0,5 in) type D-5 cassettes. In addition, this standard specifies
40、the content, format and recording method of the longitudinal record containing tracking information for the scanning head associated with the helical records, as well as the longitudinal cue audio and time and control code tracks. One video channel and four independent audio channels are recorded in
41、 the digital format. Each of these channels is designed to be capable of independent editing. The video channel records and reproduces a component television signal in the 525-line system with a frame frequency of 29,97 Hz (hereinafter referred to as “525/60 system“) and 625-line system with a frame
42、 frequency of 25,OO Hz (hereinafter referred to as “625/50 system“). 1.2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were vali
43、d. All normative documents are subject to revision, and parties to agreements based on this international Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and IS0 maintain registers of currently val
44、id International Standards. IEC 60461 :1986, Time and control code for video tape recorders IEC 60958:1989, Digital audio interface IEC 61 179:1993, Helical-scan digital composite video cassette recording system using 19 mm magnetic tape, format 02 (NTSC, PAL, PAL-M) ITU-R Recommendation BT.601-5:19
45、95, Studio encoding parameters of digital television for standard 4-3 and wide-screen 1619 aspect ratios ITU-R Recommendation 656-3:1995, Interfaces for digital component video signals in 525-line and 625-line television systems operating at the 4:2:2 level of Recommendation /TU- BT. 60 1 1.3 Defini
46、tions, symbols and abbreviations For the purposes of this International Standard, the following definitions apply. 1.3.1 ECL Emitter coupled logic, a family of digital logic integrated circuits. In this standard, ECL refers to the 10 O00 series of logic integrated circuits. 1.3.2 GF Galois Field. A
47、mathematical field containing a finite number of elements in which algebraic operations may be performed. The number of field elements is generally written as an argument in parentheses, for example G F(256). 1.3.3 LSB Least significant bit of a word of data or least significant byte of a data item
48、consisting of 2 or more bytes. 1.3.4 YS6 Most significant bit of a word of data or most significant byte of a data item consisting of 2 or more bytes. 1.3.5 ScH Colour subcarrier to horizontal sync timing relationship. 1.3.6 ECC Error correcting code 1.4 Environment and test conditions Tests and mea
49、surements made on the system to check the requirements of this standard shall be carried out under the following conditions: - temperature: 20 “C f 1 OC; - relative humidity: 50 % A 2 I; - barometric pressure: from 86 kPa to 106 kPa; - tape tension: 0,31 N f 0,05 N 1); - tape conditioning: not less than 24 h. The value measured with a tension monitor on the entrance side of the scanner may vary between manufacturers, but should typically be 030 N f 0,03 N. STD-BSI BS EN bL83.5-ENGL 1998 = lib2Vbb9 074b342 bL2 Page 10 EN 61836:1998 1.5 Reference tape B
