1、BRITISH STANDARD BS EN 61834-8:2001 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 8: PALplus format for the 625-50 system The European Standard EN 61834-8:2001 has the status of a British
2、 Standard ICS 33.160.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 61834-8:2001 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
3、 Strategy Committee on 25 October 2001 BSI 25 October 2001 ISBN 0 580 38575 2 National foreword This British Standard is the official English language version of EN 61834-8:2001. It is identical with IEC 61834-8:2001 The UK participation in its preparation was entrusted to Technical Committee EPL/10
4、0, Audio, 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 ha
5、s been 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
6、 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 S
7、tandards 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 fo
8、r change, 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
9、this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 61834-8 NORME EUROPENNE EUROPISCHE NORM September 2001 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechn
10、ique Europisches 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 61834-8:2001 E ICS 33.160.40 English version Recording Helical-s
11、can 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 8: PALplus format for the 625-50 system (IEC 61834-8:2001) Enregistrement Systme de magntoscope numrique cassette balayage hlicodal utilisant la bande magntique
12、 de 6,35 mm, destin au grand public (systmes 525-60, 625-50, 1125-60 et 1250-50) Partie 8: Format PALplus pour le systme 625-50 (CEI 61834-8:2001) Aufzeichnungstechnik - Videokassettensystem mit digitaler Schrgspuraufzeichnung auf Magnetband 6,35 mm fr den Heimgebrauch (Systeme 525-60, 625-50, 1125-
13、60, 1250-50) Teil 8: PALplus-Format fr Systeme 625-50 (IEC 61834-8:2001) This European Standard was approved by CENELEC on 2001-09-01. 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 nation
14、al 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 version in
15、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, Denmark, F
16、inland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EN 43816-8:1002 - 2 - Foreword The text of document 100/241/FDIS, future edition 1 of IEC 61834-8, prepared by IEC TC 100, Audio, video and multimedia sy
17、stems and equipment, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61834-8 on 2001-09-01. 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) 20
18、02-06-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2004-09-01 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 In
19、ternational Standard IEC 61834-8:2001 was approved by CENELEC as a European Standard without any modification. _ Page2 EN618348:2001 BSI25October200161834-8 IEC:2001 3 CONTENTS 1 General 4 1.1 Scope. 4 1.2 Normative references 4 1.3 Definitions, symbols and abbreviations 5 1.4 Test conditions and en
20、vironment. 5 2 Helical recordings 5 3 Programme track data arrangement . 5 4 Audio interface. 5 5 Video interface. 5 6 Audio signal processing . 6 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 7.4.1 Helper signals .
21、6 7.4.2 WSS signalling bits and WHITE LEVEL REFERENCE . 7 7.4.3 Sampling structure 7 7.4.4 DCT block. 7 7.4.5 Macro block 7 7.4.6 Super block. 7 7.4.7 Definition of super block number, macro block number and value of the pixel 7 7.4.8 Definition of video segment and compressed macro block . 7 7.5 DC
22、T processing 7 7.6 Quantization . 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 compressed macro block 8 7.11 Video auxiliary data (VAUX) 8 7.12 Invalid recording . 9 8 Subcode signal processing. 9
23、9 System data. 9 10 MIC (memory in cassette) 9 11 Data structure at digital interface 9 Bibliography 12 Annex ZA (normative) Normative references to international publications with their corresponding European publications13 Page3 EN618348:2001 BSI25October200161834-8 IEC:2001 4 RECORDING HELICAL-SC
24、AN 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 8: PALplus format for the 625-50 system 1 General 1.1 Scope This part of IEC 61834 is an extension of the SD specification (SD mode) and covers the features nece
25、ssary to enable a DVCR to record and reproduce PALplus signals. While all DVCRs must have the capability of recording and/or playback in SD (SP) mode, PALplus capability is optional. For this Part 8, the data structure of a track is defined by APT = 000b which consists of four areas as described in
26、4.3.2 in IEC 61834-1 and AP1 = AP2 = AP3 = 000b. There are two methods for recording the PALplus signal on a DVCR: method 1: record the partially encoded PALplus signal; method 2: record the completely decoded PALplus signal. This part is concerned with “Method 1“ (baseband helper recording) as this
27、 requires an extension to the DVCR SD specification IEC 61834-2. For “Method 2“ the DVCR is equipped with a built-in PALplus decoder and the SD specification IEC 61834-2 applies unchanged. 1.2 Normative references The following normative documents contain provisions which, through reference in this
28、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 of applying the most recent edi
29、tions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 61834-1:1998, Recording Helical-scan digital video cassette recording
30、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-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)
31、 Part 2: SD format for 525-60 and 625-50 systems Page4 EN618348:2001 BSI25October200161834-8 IEC:2001 5 IEC 61834-4:1998, 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 4: Pack header tabl
32、e 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 1.3 Definitions, symbols and abbreviations BCH code Bose-Chaudhuri-Hocquenghem code, one of the well-
33、known error correction codes CGMS Copy Generation Management System DCT Discrete Cosine Transform DVCR Digital Video Cassette Recorder ITU International Telecommunication Union MACP Motion Adaptive Colour Plus SDTR Standard Definition Transparent VAUX Video Auxiliary Data VLC Variable Length Coding
34、WSS Wide Screen Signalling Helper signal The extra signal coded into the letterbox black bars to restore full luminance vertical resolution 1.4 Test conditions and environment Same as IEC 61834-2. 2 Helical recordings Same as 625-50 system in IEC 61834-2. 3 Programme track data arrangement Same as 6
35、25-50 system in IEC 61834-2. 4 Audio interface Same as IEC 61834-2. 5 Video interface The principal mode of interface is analogue. The analogue video signal shall be converted according to 7.4.1 in IEC 61834-2. The video signal may also be input and output digitally in a bit-serial form. When the bi
36、t-serial interface for this standard is prepared, the data structure for transmission shall conform to clause 11. For details of the standard digital interface, refer to IEC 61883-1 and IEC 61883-2. Page5 EN618348:2001 BSI25October200161834-8 IEC:2001 6 6 Audio signal processing Same as 625-50 syste
37、m in IEC 61834-2. 7 Video signal processing 7.1 Introduction The helper signals are demodulated. After certain processing, they are treated in the Y channel. The WSS signalling bits are rewritten and stored in the VAUX TR pack. The WHITE LEVEL REFERENCE is also written in the VAUX TR pack. 7.2 Error
38、 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 a) Recording The helper signal and the helper reference burst in line 23 are demodulated on the U (B-Y) phase of the colour subcarrier and processed as a Y signal before comp
39、ression (refer to figure 1). A constant DC level is added to the demodulated helper signal and the helper reference burst signal, before recording (refer to figure 2). The “helper killer“ block can be incorporated to enable PALplus recording without the helper (helper killer mode). The helper killer
40、 mode may optionally be used in some situations. In helper killer mode, b6 is set to “0“. Bit b5 should always be set to “0“, irrespective of the presence of a MACP decoder before recording. Optionally, the luminance level may be set to 32 and chrominance levels to 128 in lines 60, 61, 62 and lines
41、372, 373, 374 (refer to figure 3). b) Playback The reproduced helper signal and the helper reference burst in line 23, after DC level correction, are modulated on the U (B-Y) phase of the colour subcarrier, and appear at the Y/C output (S-terminal) as the C signal (refer to figure 4). c) Interface I
42、n the case of a Y/C interface, the following signals appear at the output: Y: luminance signal, WSS bits (line 23), the white reference signal (line 623); C: chrominance signal, the modulated helper and helper reference signals. Page6 EN618348:2001 BSI25October200161834-8 IEC:2001 7 7.4.2 WSS signal
43、ling bits and WHITE LEVEL REFERENCE WSS signalling bits are rewritten and stored in the VAUX TR pack as shown in table 1 and 8.7 of IEC 61834-4. The WHITE LEVEL REFERENCE from line 623 is written in the VAUX TR pack (refer to figure 5). The WSS signalling bits in line 23 are encoded according to the
44、 contents of the VAUX TR pack, except for CGMS data. The CGMS priority is given to the CGMS in the VAUX SOURCE CONTROL pack. The white reference signal in line 623 is generated according to the WHITE LEVEL REFERENCE in the VAUX TR pack. 7.4.3 Sampling structure Same as 625-50 system in 7.4.1 of IEC
45、61834-2. 7.4.4 DCT block Same as 625-50 system in 7.4.2 of IEC 61834-2. 7.4.5 Macro block Same as 625-50 system in 7.4.3 of IEC 61834-2. 7.4.6 Super block Same as 625-50 system in 7.4.4 of IEC 61834-2. 7.4.7 Definition of super block number, macro block number and value of the pixel Same as 625-50 s
46、ystem in 7.4.5 of IEC 61834-2. 7.4.8 Definition of video segment and compressed macro block Same as 625-50 system in 7.4.6 of IEC 61834-2. 7.5 DCT processing Same as 625-50 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 Arrangem
47、ent of a compressed macro block Same as 625-50 system in IEC 61834-2. 7.9 Arrangement of a video segment Same as 625-50 system in IEC 61834-2. Page7 EN618348:2001 BSI25October200161834-8 IEC:2001 8 7.10 Data-sync block and compressed macro block Same as 625-50 system in IEC 61834-2. 7.11 Video auxil
48、iary data (VAUX) 50/60 and STYPE of VAUX0, REC ST, REC MODE, BCSYS and DISP of VAUX1 and VAUX6 data signals shall be set to the appropriate values for an anticipated playback. VAUX SOURCE pack: In accordance with the video signal 50/60: 50 or 60 field system (only the 50 field system shall be used)
49、STYPE: video signal type 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 Broadcasting BCSYS: broadcast system DISP: 4:3 or 16:9, etc. The WSS signalling bits are rewritten and stored in the VAUX TR pack as shown in table 1. Recorded WSS bits: b0
