1、BRITISH STANDARD 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 Standard ICs 33.
2、160.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 61834-8:2001 BS EN 61834-82001 Amd. No. National foreword Date Comments 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
3、 its preparation was entrusted to Technical Committee EPL1100, Audio, video and multimedia systems and equipment, which has the responsibility to: This British Standard, having been prepared under the direction of the Electrotechnical Sector Policy and Strategy Committee, was published under the aut
4、hority of the Standards Policy and Strategy Committee on 25 October 2001 - - aid enquirers 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 internation
5、al and European developments and promulgate them in the UK. - A list of organizations represented on this committee can be obtained on request to its secretary. From i January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC
6、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 found in the BSI Stan
7、dards 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 Standards are responsible
8、for their correct application. Compliance with a British Standard does not of itself confer 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 doc
9、ument indicates when the document was last issued. Amendments issued since publication Q BSI 25 October 2001 ISBN O 580 38575 2 EUROPEAN STANDARD EN 61834-8 NORME EUROPENNE EUROPISCHE NORM September 2001 ICs 33.160.40 English version Recording - Helical-scan digital video cassette recording system u
10、sing 6,35 mm magnetic tape for consumer use (525-60,62550, 1125-60 and 1250-50 systems) Part 8: PALpIus format for the 625-50 system (IEC 61834-812001) Enregistrement - Systme de magntoscope numrique cassette balayage hlicodal utilisant la bande magntique de 6,35 mm, destin au grand public (systmes
11、525-60, 625-50, 1125-60 et 1250-50) Partie 8: Format PALpIus pour le systme 625-50 (CE1 61834-812001) Aufzeichnungstechnik - Videokassettensystem mit digitaler Schrgspuraufzeichnung auf Magnetband 6,35 mm fr den Heimgebrauch (Systeme 525-60,625-50, 1125-60, Teil 8: PALplus-Format fr Systeme 625-50 1
12、250-50) (IEC 61834-8:2001) This European Standard was approved by CENELEC on 2001-09-01. CENELEC members are bound to comply with the CEWCENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Uptc-date l
13、ists 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 any other language made by translation under the
14、 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, Finland, France, Germany, Greece, Iceland, Irelan
15、d, 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 Elekkotechnische Normung Central Secretariat: rue de Stassart 35,
16、 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 61834-8:2001 E Page 2 EN 61834-82001 Foreword The text of document 100/241/FDIS, future edition 1 of IEC 61834-8, prepared by IEC TC 100, Audio, video and m
17、ultimedia systems 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 endors
18、ement (dop) 2002-06-01 - latest date by which the national standards conflicting with the EN have to be withdrawn (daw) 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
19、text of the International Standard IEC 61834-8:2001 was approved by CENELEC as a European Standard without any modification. O BSI 25 October 2001 Page 3 EN 61834-8:2001 CONTENTS General 4 1.1 Scope . 4 1.2 Normative references 4 1.3 1.4 Test conditions and environment . 5 Helical recordings 5 Audio
20、 interface . 5 Video interface . 5 Audio signal processing . 6 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 . 6 7.4.2 WSS signalling bits and WHITE LEVEL REFERENCE . 7 7.4.3 Sampling structure 7
21、7.4.4 DCT block . 7 7.4.5 Macro block 7 7.4.6 Super block . 7 7.4.7 the pixel 7 7.4.8 7.5 DCT processing 7 Variable length coding (VLC) . 7 Arrangement of a compressed macro block . 7 Arrangement of a video segment . 7 Definitions, symbols and abbreviations 5 Programme track data arrangement . 5 Def
22、inition of super block number, macro block number and value of Definition of video segment and compressed macro block . 7 7.6 Quantization . 7 7.7 7.8 7.9 7.10 Data-sync block and compressed macro block 8 7.1 1 Video auxiliary data (VAUX) 8 7.12 Invalid recording . 9 System data . 9 Subcode signal p
23、rocessing . 9 10 MIC (memory in cassette) 9 1 I Data structure at digital interface 9 Bibliography 12 Annex ZA (normative) Normative references to international publications with their corresponding European publications . 13 O BSI 25 October 2001 . . . . . . -j . . . .,. .i .: : . . d Page 4 EN 618
24、34-8:2001 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 i General 1.1 Scope This part of IEC 61834 is an extension of the SD specification (SD mo
25、de) and covers the features necessary to enable a DVCR to record and reproduce PALplus signals. While all DVCRs must have the capability of recording andlor 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 consist
26、s of four areas as described in 4.3.2 in IEC 61834-1 and API = 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“
27、 (baseband helper recording) as this 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 provisio
28、ns which, through reference in this text, constitute provisions of this part of IEC 61 834. 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 possib
29、ility 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 : 1998, Recording - Heli
30、cal-scan digital video cassette recording system using 6,35 mm magnetic tape for consumer use (525-60, 625-50, f 1 25-60 and 7250-50 systems) - Pari I: General specifications IEC 61 834-2:1998, Recording - Helical-scan digital video cassette recording system using 6,35 mm magnetic tape for consumer
31、use (525-60, 625-50, 1125-60 and 1250-50 systems) - Pari 2: SD format for 525-60 and 625-50 systems O BSI 25 October 2001 Page 5 EN 61834-8:2001 IEC 61 834-4: 1998, Recording - Helical-scan digital video cassette recording system using 6,35 mm magnetic tape for consumer use (525-60, 625-50, 7125-60
32、and 1250-50 systems) - Part 4: Pack header table and contents IEC 61883-1:1998, Consumer audio/video equipment - Digital interface - Part I: General IEC 61883-21998, Consumer audio/video equipment - Digital interface - Part 2: SD-DVCR data transmission 1.3 Definitions, symbols and abbreviations BCH
33、code CGMS DCT DVCR ITU MACP SDTR VAUX VLC wss Helper signal Bose-Chaudhuri-Hocquenghem code, one of the well-known error correction codes Copy Generation Management System Discrete Cosine Transform Digital Video Cassette Recorder International Telecommunication Union Motion Adaptive Colour Plus Stan
34、dard Definition Transparent Video Auxiliary Data Variable Length Coding Wide Screen Signalling The extra signal coded into the letterbox black bars to restore full luminance vertical resolution .4 Test conditions and environment Same as IEC 61834-2. 2 Helical recordings Same as 625-50 system in IEC
35、61 834-2. 3 Programme track data arrangement Same as 625-50 system in IEC 61 834-2. 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
36、 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. For details of the standard digital interface, refer to IEC 61883-1 and IEC 61883-2. O BSI 25 October 2001 Page 6 EN 61834-8:2001 6
37、 Audio signal processing Same as 625-50 system in IEC 61 834-2. 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
38、is also written in the VAUX 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 a) Recording The helper signal and the helper reference burst in line 23 are demodulated on the U (B-Y) phase of the colour subc
39、arrier and processed as a Y signal before compression (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
40、helper (helper killer mode). The helper killer mode may optionally be used in some situations. In helper killer mode, b6 is set to “O“. Bit b5 should always be set to “O“, irrespective of the presence of a MACP decoder before recording. Optionally, the luminance level may be set to 32 and chrominanc
41、e levels to 128 in lines 60, 61, 62 and lines 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 YIC output (S-terminal) as th
42、e C signal (refer to figure 4). c) Interface In the case of a YIC 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. 0 BSI 25 October 2001
43、 Page 7 EN 61834-8:2001 7.4.2 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). WSS signalling bits and WHITE LEVEL REFERENCE The WSS signalling bits
44、 in line 23 are encoded according to the 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 structur
45、e Same as 625-50 system in 7.4.1 of IEC 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 Same as 625-50 system in 7.4.5 of IEC 61834-2. Defin
46、ition of super block number, macro block number and value of the pixel 7.4.8 Same as 625-50 system in 7.4.6 of IEC 61834-2. Definition of video segment and compressed macro block 7.5 DCT processing Same as 625-50 system in IEC 61834-2. 7.6 Quant iza t ion Same as IEC 61834-2. 7.7 Variable length cod
47、ing (VLC) Same as IEC 61834-2. 7.8 Same as 625-50 system in IEC 61 834-2. Arrangement of a compressed macro block 7.9 Same as 625-50 system in IEC 61 834-2. Arrangement of a video segment O BSI 25 October 2001 . Page 8 EN 61834-82001 7.10 Data-sync block and compressed macro block Same as 625-50 sys
48、tem in IEC 61 834-2. 7.11 Video auxiliary data (VAUX) 50/60 and STYPE of VAUXO, 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: STYPE: VAUX SOURCE CONTROL
49、 pack: Copy generation CGMS: Recording start point REC ST: Recording mode REC MODE: Broadcasting BCSYS: DISP: 50 or 60 field system (only the 50 field system shall be used) video signal type copy generation management system recording start point or not original, insert or invalid recording broadcast system 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: bo: aspect ratio bl: aspect ratio b2: aspect ratio b3: parity b4: film bit b5: colour coding process b6: helper signal b7: reserved b8
