1、BRITISH STANDARD BS EN 61834-7:2001 IEC 61834-7:2001 Recording Helical-scan digital video cassette recording system using 6,35 mm magnetic tape for consumer use (525-60, 625-50, 1125-60 and 1250-50 systems) Part 7: EDTV2 format The European Standard EN 61834-7:2001 has the status of a British Standa
2、rd ICS 33.160.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 61834-7:2001 This British Standard, having been prepared under the direction of the Electrotechnical Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strate
3、gy Committee on 3 December 2001 BSI 3 December 2001 ISBN 0 580 38754 2 National foreword This British Standard is the official English language version of EN 61834-7:2001. It is identical with IEC 61834-7:2001 The UK participation in its preparation was entrusted to Technical Committee EPL/100, Audi
4、o, video and multimedia systems and equipment, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been
5、renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references The British Standards which implement international or European publications referred to in this document may be fou
6、nd 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 Standard
7、s are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for chang
8、e, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 13 and a back cover. The BSI copyright date displayed in this doc
9、ument indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 61834-7 NORME EUROPENNE EUROPISCHE NORM June 2001 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisc
10、hes Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2001 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61834-7:2001 E ICS 33.160.40 English version Recording - Helical-scan digital
11、 video cassette recording system using 6,35 mm magnetic tape for consumer use (525-60, 625-50, 1125-60 and 1250-50 systems) Part 7: EDTV2 format (IEC 61834-7:2001) Enregistrement - Systme de magntoscope numrique cassette balayage hlicodal utilisant la bande magntique de 6,35 mm, destin au grand publ
12、ic (systmes 525-60, 625-50, 1125-60 et 1250-50) Partie 7: Format EDTV2 (CEI 61834-7:2001) Aufzeichnungstechnik - Videokassettensystem mit digitaler Schrgspuraufzeichnung auf Magnetband 6,35 mm fr den Heimgebrauch (Systeme 525-60, 625-50, 1125-60, 1250-50) Teil 7: EDTV2-Format (IEC 61834-7:2001) This
13、 European Standard was approved by CENELEC on 2001-05-01. 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 refe
14、rences 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 other language made by translation under the responsibility of a CENELEC
15、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, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherl
16、ands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EN 61834-7:2001 - 2 - Foreword The text of document 100B/284/FDIS, future edition 1 of IEC 61834-7, prepared by SC 100B, Recording, of IEC TC 100, Audio, video and multimedia systems and equipment, was submitted to the IEC-CENELEC
17、 parallel vote and was approved by CENELEC as EN 61834-7 on 2001-05-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2002-02-01 latest date by which the national standards
18、conflicting with the EN have to be withdrawn (dow) 2004-05-01 Annexes designated “normative“ are part of the body of the standard. In this standard, annex ZA is normative. Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 61834-7:2001 was approved by
19、 CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60461 NOTE: Harmonized as HD 507 S1:1988 (not modified). IEC 60735 NOTE: Harmonized as EN 60735:1991 (not modified). IEC 60958 NO
20、TE: Harmonized as EN 60958:1990 (not modified). _ Page2 EN618347:2001 BSI3December200161834-7 IEC:2001 3 CONTENTS Page Clause 1 General 4 1.1 Scope. 4 1.2 Normative references 4 1.3 Definitions, symbols and abbreviations 5 1.4 Environment and test conditions 5 2 Helical recordings 5 3 Programme trac
21、k data arrangement . 5 4 Audio interface. 5 5 Video interface. 5 6 Audio signal processing . 5 7 Video signal processing . 6 7.1 Introduction. 6 7.2 Error correction code 6 7.3 Randomization pattern 6 7.4 Video structure . 6 7.5 DCT processing 7 7.6 Quantization . 7 7.7 Variable length coding (VLC).
22、 7 7.8 Arrangement of a compressed macro block. 7 7.9 Arrangement of a video segment. 7 7.10 Data-sync block and compressed macro block 7 7.11 Video auxiliary data (VAUX) 7 7.12 Invalid recording . 8 8 Subcode signal processing. 8 9 System data. 8 10 MIC (memory in cassette) 8 11 Data structure at d
23、igital interface 9 Bibliography12 Annex ZA (normative) references to international publications with their corresponding European publications.13 Figure 1 Block diagram of EDTV2 recording. 9 Figure 2 Signal amplitudes for EDTV2 recording 10 Figure 3 Signal amplitudes in lines 53, 54, 231, 232 and li
24、nes 316, 493, 494, 495 10 Figure 4 Block diagram of EDTV2 playback 11 Table 1 VAUX TR pack 11 Page3 EN618347:2001 BSI3December200161834-7 IEC:2001 4 RECORDING HELICAL-SCAN DIGITAL VIDEO CASSETTE RECORDING SYSTEM USING 6,35 mm MAGNETIC TAPE FOR CONSUMER USE (525-60, 625-50, 1125-60 and 1250-50 system
25、s) Part 7: EDTV2 format 1 General 1.1 Scope This part of IEC 61834 is an extension to the SD specification (SD mode) and covers the features necessary for the recording and reproduction of EDTV2 signals. While all DVCRs must have the capability of recording and/or playback in SD (SP) mode, this exte
26、nsion is optional. For this part 7, the data track structure of a track is defined by APT = 000b which consists of four areas as described in 4.3.2 of IEC 61834-1, and AP1 = AP2 = AP3 = 000b. NOTE EDTV2 signal format is described in the specification: BTA T-1004-1995: Video signal interfaces for EDT
27、V2 studio equipment. 1.2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 61834. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However,
28、 parties to agreements based on this part of IEC 61834 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IEC and ISO maint
29、ain registers of currently valid International Standards. IEC 61834-1:1998, Recording Helical-scan digital video cassette recording system using 6,35 mm magnetic tape for consumer use (525-60, 625-50, 1125-60 and 1250-50 systems) Part 1: General specifications IEC 61834-2:1998, Recording Helical-sca
30、n digital video cassette recording system using 6,35 mm magnetic tape for consumer use (525-60, 625-50, 1125-60 and 1250-50 systems) Part 2: SD format for 525-60 and 625-50 systems IEC 61834-4:1998, Recording Helical-scan digital video cassette recording system using 6,35 mm magnetic tape for consum
31、er use (525-60, 625-50, 1125-60 and 1250-50 systems) Part 4: Pack header table and contents IEC 61883-1:1998, Consumer audio/video equipment Digital interface Part 1: General IEC 61883-2:1998, Consumer audio/video equipment Digital interface Part 2: SD-DVCR data transmission Page4 EN618347:2001 BSI3
32、December200161834-7 IEC:2001 5 1.3 Definitions, symbols and abbreviations For the purposes of this part of IEC 61834, the following abbreviations apply. AAUX: Audio auxiliary data BCH code: Bose-Chaudhuri-Hocquenghem code (one of the well known error correction codes) CGMS: Copy generation managemen
33、t system DCT: Discrete cosine transform EOB: End of block NABTS: North American broadcasting teletext specifications OETM events: Optional events except text and makers optional events TOC: Table of contents VAUX: Video auxiliary data VLC: Variable length coding 1.4 Environment and test conditions S
34、ame as IEC 61834-2. 2 Helical recordings Same as 525-60 system in IEC 61834-2. 3 Programme track data arrangement Same as 525-60 system in IEC 61834-2. 4 Audio interface Same as IEC 61834-2. 5 Video interface The principal interface mode is analogue. The analogue video signal shall be converted acco
35、rding to 7.4.3. The video signal may also be input and output digitally in a bit-serial form. When the bit-serial interface for this standard is prepared, the data structure for transmission shall conform to clause 11. Refer to IEC 61883-1 and IEC 61883-2 for details of digital interface. 6 Audio si
36、gnal processing Same as 525-60 system in IEC 61834-2. Page5 EN618347:2001 BSI3December200161834-7 IEC:2001 6 7 Video signal processing 7.1 Introduction The helper signals are demodulated. They are handled by the Y channel. After certain processing, EDTV2 ID bits are rewritten and stored in the VAUX
37、TR pack. 7.2 Error correction code Same as IEC 61834-2. 7.3 Randomization pattern Same as IEC 61834-2. 7.4 Video structure 7.4.1 Helper signals Recording The vertical helper signal (VT/VH) is demodulated on the Q phase of the colour subcarrier with the adaptive set-up level preserved. The amplitude
38、of the demodulated vertical helper signal is multiplied by 0,5, a DC level of 16 is added and it is then inserted into the Y channel (refer to figures 1 and 2). Recording of the vertical helper signal is optional. The horizontal helper signal (HH) shall be decoded and added to the luminance signal.
39、The EDTV2 signal may optionally be recorded without the helpers (helper killer mode). In some situations the helper killer mode may optionally be used, in which case b8 to b11 in the EDTV2 ID should be set to “0“. In lines 53, 54, 231, 232 and also lines 316, 493, 494, 495, the luminance and chromin
40、ance levels may optionally be set to 32 and 128 respectively (refer to figure 3). Playback The DC level and the amplitude of the reproduced vertical helper signal is reconstructed to its original state (refer to figure 4). 7.4.2 EDTV2 ID bits EDTV2 ID (b1 to b24) are rewritten and stored in the VAUX
41、 TR pack as shown in table 1 (refer to 7.11).EDTV2 ID (b1 to b24) in lines 22 and 285 are encoded according to the contents of the VAUX TR pack and the confirmation signal (b25 to b27) in lines 22 and 285 is reconstructed to accord with EDTV2 specifications. 7.4.3 Sampling structure Same as 525-60 s
42、ystem in 7.4.1 of IEC 61834-2. Page6 EN618347:2001 BSI3December200161834-7 IEC:2001 7 7.4.4 DCT block Same as 525-60 system in 7.4.2 of IEC 61834-2. 7.4.5 Macro block Same as 525-60 system in 7.4.3 of IEC 61834-2. 7.4.6 Super block Same as 525-60 system in 7.4.4 of IEC 61834-2. 7.4.7 Definition of s
43、uper block number, macro block number and value of the pixel Same as 525-60 system in 7.4.5 of IEC 61834-2. 7.4.8 Definition of video segment and compressed macro block Same as 525-60 system in 7.4.6 of IEC 61834-2. 7.5 DCT processing Same as 525-60 system in IEC 61834-2. 7.6 Quantization Same as IE
44、C 61834-2. 7.7 Variable length coding (VLC) Same as IEC 61834-2. 7.8 Arrangement of a compressed macro block Same as 525-60 system in IEC 61834-2. 7.9 Arrangement of a video segment Same as 525-60 system in IEC 61834-2. 7.10 Data-sync block and compressed macro block Same as 525-60 system in IEC 618
45、34-2. 7.11 Video auxiliary data (VAUX) 50/60 and STYPE of VAUX0, REC ST, REC MODE, BCSYS and DISP of VAUX1 and VAUX6 shall be set to the correct values for an expected playback. VAUX SOURCE pack: According to the video signal 50/60: 50 field system or 60 field system (only the 60 field system shall
46、be used) STYPE: video signal type Page7 EN618347:2001 BSI3December200161834-7 IEC:2001 8 VAUX SOURCE CONTROL pack: Copy generation CGMS: copy generation management system Recording start point REC ST: recording start point or not Recording mode REC MODE: original, insert or invalid recording Broadca
47、sting BCSYS: broadcast system DISP: 4:3 or 16:9, etc. EDTV2 ID bits (b1 to b24) are rewritten and stored in VAUX TR pack as shown in table 1. EDTV2 ID b1: reference no change b12: undefined no change b2: reference no change b13: undefined no change b3: letter box no change b14: undefined no change b
48、4: parity no change b15: undefined no change b5: undefined no change b16: undefined no change b6: field no change b17: undefined no change b7: frame no change b18: CRC parity change according to b3 to b17 b8: VT 1 = Modulated VT b19: CRC parity change according to b3 to b17 0 = No VT b20: CRC parity
49、 change according to b3 to b17 b21: CRC parity change according to b3 to b17 b9: VH 1 = Modulated VH b22: CRC parity change according to b3 to b17 0 = No VH b23: CRC parity change according to b3 to b17 b10: HH 0 = No HH b24: “0“ no change b11: pre-combing 0 = pre-combing OFF Other data in main area should be set to the correct values. More details and o
