1、Recording Helical-scan digital video cassette recording system using 6,35 mm magnetic tape for consumer use and 1250-50 systems) (525-60,625-50, 1125-60 Part 7: EDTV2 format The European Standard EN 61834-7:2001 has the status ofa British Standard ICs 33.160.40 BS EN IEC 61 834-712001 61 834-712001
2、BS EN 61834-712001 Amd. No. National foreword Date Comments 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 Strategy Committee on 3 December 200 1 This British
3、Standard is the official English language version of EN 61834-7:2001. It is identical with IEC 61834-7:2001 The UKparticipation in its preparation was entrusted to Technical Committee EPL/100, Audio, video and multimedia systems and equipment, which has the responsibility to: - - aid enquirers to un
4、derstand the text; present to the responsible international/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 represente
5、d 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 renumbered as IEC 60027-1. For a period oftime during the change over from one numbering system to the other, publ
6、ications may contain identifiers from both systems. Cr oss-r e fer enc e s The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”,
7、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 Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer
8、 immunity from legal obligations. 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 document indicates when the document was last issued. O BSI 3 December 200 1 ISBN O 580 38754 2
9、 EUROPEAN STANDARD EN 61834-7 NORME EUROPENNE EUROPflSCHE NORM June 2001 ICs 33.160.40 English version Recording - Helical-scan digital video cassette recording system using 6,35 mm magnetic tape for consumer use (525-60, 625-50, 1 125-60 and 1250-50 systems) Part 7: EDW2 format (IEC 61 834-712001)
10、Enregistrement - Aufzeichnungstechnik - Systme de magntoscope numrique $ cassette $ balayage hlicoOdal utilisant la bande magntique de 6,35 mm, destin 625-50, 1 125-60 et 1250-50) Videokassettensystem mit digitaler Scht%oogspuraufzeichnung auf Magnetband 6,35 mm far den Heimgebrauch (Systeme Teil 7:
11、 EDTV2-Format au grand public (systmes 525-60, Partie 7: Format EDTV2 (CE1 61834-712001) 525-60, 625-50, 1 125-60, 1250-50) (IEC 61834-712001) This European Standard was approved by CENELEC on 2001-05-01. CENELEC members are bound to comply with the CENKENELEC Internal Regulations which stipulate th
12、e 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 may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exist
13、s 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 to the Central Secretariat has the same status as the official versions. CENELEC members are the national electr
14、otechnical committees of Austria, Belgium, Czech Republic, 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 No
15、rmalisation Electrotechnique Eurqfhlsches Komitee f, r Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels O 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 Page 2 EN 61834-7200
16、1 Foreword The text of document 100B/284/FDIS, future edition 1 of IEC 61834-7, prepared by SC IOOB, 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 61834-7 on 2001-05-01. The following date
17、s 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 latest date by which the national standards conflicting with the EN have to be withdrawn Annexes designated “normative“ are part of the body of the sta
18、ndard. In this standard, annex ZA is normative. Annex ZA has been added by CENELEC. (Clop) 2002-02-01 (dow) 2004-05-01 Endorsement notice The text of the International Standard IEC 61834-7:2001 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibl
19、iography, 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). NOTE: Harmonized as EN 60958:1990 (not modified). IEC 60958 O BSI 3 December 2001 Page 3 EN 61834-72001
20、 CONTENTS Page Clause 4 . 4 Definitions, symbols and abbreviations 5 Environment and test conditions 5 1 .I Scope . 4 1.3 1.4 2 Helical recordings . 5 3 Programme track data arrangement . 5 4 Audio interface 5 5 Video interface 5 6 Audio signal processing . 5 7 Video signal processing . 6 7.1 Introd
21、uction . .6 7.2 Error correction code .6 7.3 Randomization pattern .6 7.4 Video structure . .6 .7 7.6 Quantization . 7.5 DCT processing .7 7.7 Variable length coding (VLC) . .7 7.8 Arrangement of a compressed macro block . .7 7.9 Arrangement of a video segment . .7 7.10 Data-sync block and compresse
22、d macro block .7 7.1 1 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 Bibliography . . 12 11 Data structure at digital interface 9 Annex ZA (normative) references to international publications with their co
23、rresponding 13 European publications . Figure 1 - Block diagram of EDTV2 recording . 9 Figure 2 - Signal amplitudes for EDTV2 recording 1 O Figure 3 - Signal amplitudes in lines 53, 54, 231, 232 and lines 316, 493, 494, 495 10 Figure 4 - Block diagram of EDTV2 playback 11 Table 1 - VAUX TR pack 11 O
24、 BSI 3 December 2001 Page 4 EN 61834-72001 RECORDING - HELICAL-SCAN DIGITAL VIDEO CASSETTE RECORDING SYSTEM USING 6,351 mm MAGNETIC TAPE FOR CONSUMER USE (525-60, 625-50, 1125-60 and 1250-50 systems) - Part 7: EDTV2 format 1 General 1.1 Scope This part of IEC 61834 is an extension to the SD specific
25、ation (SD mode) and covers the features necessary for the recording and reproduction of EDTV2 signals. While all DVCRs must have the capability of recording andlor playback in SD (SP) mode, this extension is optional. For this part 7, the data track structure of a track is defined by APT = 000b whic
26、h consists of four areas as described in 4.3.2 of IEC 61834-1. and API = AP2 = AP3 = 000b. NOTE studio equipment. EDTV2 signal format is described in the specification: BTA T-1004-1995: Video signal interfaces for EDTV2 1.2 Normative references The following normative documents contain provisions wh
27、ich, 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, parties to agreements based on this part of IEC 61834 are encouraged to investigate the possibility
28、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 IS0 maintain registers of currently valid International Standards. IEC 61 834-1 :I 998, Recording - Helical-sc
29、an digifal video casseffe recording sysfem using 6,35 mm magnefic fape for consumer use (525-60, 625-50, 1125-60 and 1250-50 sysfems) - Parf 1: General specificafions IEC 61 834-2:1998, Recording - Helical-scan digifal video casseffe recording sysfem using 6,35 mm magnefic fape for consumer use (525
30、-60, 625-50, 1125-60 and 1250-50 sysfems) - Parf 2: SD formaf for 525-60 and 625-50 sysfems IEC 61 834-4:1998, Recording - Helical-scan digifal video casseffe recording sysfem using 6,35 mm magnefic fape for consumer use (525-60, 625-50, 1125-60 and 1250-50 sysfems) - Parf 4: Pack header fable and c
31、onfenfs IEC 61883-1 :1998, Consumer audiolvideo equipmenf - Digifal inferface - Parf 1: General IEC 61883-2:1998, Consumer audiolvideo equipmenf - Digifal inferface - Parf 2: SD-DVCR da fa fransmission O BSI 3 December 2001 Page 5 EN 61834-72001 1.3 Definitions, symbols and abbreviations For the pur
32、poses of this part of IEC 61834, the following abbreviations apply. AAUX: BCH code: CGMS: DCT: EOB: NABTS: OETM events: TOC: VAUX: VLC: Audio auxiliary data Bose-Chaudhuri-Hocquenghem code (one of the well known error correction cod es) Copy generation management system Discrete cosine transform End
33、 of block North American broadcasting teletext specifications Optional events except text and makers optional events Table of contents Video auxiliary data Variable length coding 1.4 Environment and test conditions Same as IEC 61834-2. 2 Helical recordings Same as 525-60 system in IEC 61834-2. 3 Pro
34、gramme 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 according to 7.4.3. The video signal may also be input and output digitally in a bit-ser
35、ial 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 signal processing Same as 525-60 system in IEC 61834-2. O BSI 3 December 2001 Page 6 E
36、N 61834-72001 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 TR pack. 7.2 Error correction code Same as IEC 61834-2. 7.3 Randomization pattern Same as IEC 6
37、1834-2. 7.4 Video structure 7.4.1 Helper signals Recording The vertical helper signal (VTNH) is demodulated on the Q phase of the colour subcarrier with the adaptive set-up level preserved. The amplitude of the demodulated vertical helper signal is multiplied by 0,5, a DC level of 16 is added and it
38、 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. The EDTV2 signal may optionally be recorded without the helpers (helper killer mode). In some si
39、tuations the helper killer mode may optionally be used, in which case b8 to bl1 in the EDTV2 ID should be set to “O“. In lines 53, 54, 231, 232 and also lines 316, 493, 494, 495, the luminance and chrominance levels may optionally be set to 32 and 128 respectively (refer to figure 3). Playback The D
40、C 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 (bl to b24) are rewritten and stored in the VAUX TR pack as shown in table 1 (refer to 7.11).EDTV2 ID (bl to b24) in lines 22 and 285 are encode
41、d 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 system in 7.4.1 of IEC 61834-2. O BSI 3 December 2001 Page 7 EN 61834-72001 7.4.4 DCT block Same
42、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 Same as 525-60 system in 7.4.5 of IEC 61834-2. Definition of super block number, macro block number and value of the pixel
43、 7.4.8 Same as 525-60 system in 7.4.6 of IEC 61834-2. Definition of video segment and compressed macro block 7.5 DCT processing Same as 525-60 system in IEC 61834-2. 7.6 Quantization Same as IEC 61834-2. 7.7 Variable length coding (VLC) Same as IEC 61834-2. 7.8 Same as 525-60 system in IEC 61834-2.
44、Arrangement of a compressed macro block 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 61834-2. 7.1 1 Video auxiliary data (VAUX) 50/60 and STYPE of VAUXO, REC ST, REC MODE, BCSYS and DISP of VAUX1
45、 and VAUX6 shall be set to the correct values for an expected playback. VAUX SOURCE pack: According to the video signal 50/60: STYPE: video signal type 50 field system or 60 field system (only the 60 field system shall be used) O BSI 3 December 2001 Page 8 EN 61834-72001 VAUX SOURCE CONTROL pack: Co
46、py 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 Broadcasting BCSYS: broadcast system DISP: 4:3 or 16:9, etc. EDTV2 ID bits (bl to b24) are rewritten and stored in VAUX TR p
47、ack as shown in table 1. EDTV2 ID bl : reference b2: reference b3: letter box b4: parity b5: undefined b6: field b7: frame b8: VT b9: VH b10: HH bl 1: pre-combing no change no change no change no change no change no change no change 1 = Modulated VT O=NoVT 1 = Modulated VH O=NoVH O = No HH O = pre-c
48、ombing OFF b12: undefined b13: undefined b14: undefined bl5: undefined b16: undefined b17: undefined b18: CRC parity b19: CRC parity b20: CRC parity b21: CRC parity b22: CRC parity b23: CRC parity b24: “O“ no change no change no change no change no change no change change according to b3 to b17 chan
49、ge according to b3 to b17 change according to b3 to b17 change according to b3 to b17 change according to b3 to b17 change according to b3 to b17 no change Other data in main area should be set to the correct values. More details and other items are described in 9.5 of IEC 61834-2 and 9.2 of IEC 61834-4. 7.12 Invalid recording Same as IEC 61834-2. 8 Subcode signal processing Same as 525-60 system in IEC 61834-2. 9 System data Same as 525-60 system in IEC 61834-2. 10 MIC (memory in cassette) Same as IEC 61834-2. O BSI 3 December 2001 Page 9 EN 61834-72001 EDTV2 signal 11
