1、BRITISH STANDARD Recording - Helical-scan digital video cassette recording system using 6,35 rnrn magnetic tape for consumer use (525-60, 625-50,1125-60 and 1250-50 systems) - Part 5: The character information system The European Standard EN 61834-51998 has the status of a British Standard ICs 33.10
2、040 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 61834-5:1998 IEC 61834-5:1998 STD-BSI BS EN bL834-5-ENGL AmdNo. Date BS EN 61834-6:1998 Text affected This British Standard, having been prepared under the direction of the Electrotechnical Sector Committee,was publishe
3、d under the authority of the Standards Committee and comes into effect on 16 December 1998 Q BSI 1998 ISBN O 680 30868 6 National foreword This British Standard is the English language version of EN 6183441998. It is identical with IEC 61834r5: 1998. The UK participation in its preparation was entru
4、sted by Technical Committee EPY100, Audio, video and multimedia systems and equipment, to Subcommittee EPY100/2, Recording, which has the responsibility to: - aid enquirers to understand the text; - present to the responsible internaional/Europm committee any enquiries on the interpretation, or prop
5、osals for change, and keep the UK interests informed; - monitor related intemational and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request Flom 1 January 1997, all IEC publications have the number 60000 added to t
6、he old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contah idenaers from both systems. Cross-references Attention is drawn to the fact that CEN and CENELEC standards normally in
7、clude an annex which lists normative references to inkrnational publications with their corresponding European publications. The Brim Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards
8、 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 Stan* are responsible for their correct application. Compliance with a British Standard does n
9、ot of itself confer immunity from legal obligations. to its secretary. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 50, an inside back cover and a back cover. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61834-5 October 1998 ICs
10、 33.160.40 Descriptors: Video equipment, digital technics, magnetoscopes, video recording, sound recording, cassettes for magnetic tapes, magnetic tapes, recording characteristics, data processing, data, organisation of data, character sets English version Recording - Helical-scan digital video cass
11、ette recording system using 6,35 mm magnetic tape for consumer use (525-60, 625-50, I 125-60 and 1250-50 systems) Part 5: The character information system (IEC 61 834-5: 1 998) Enregistrement - Systme de magntoscope numrique cassette balayage hlicodal utilisant la bande magntique de 6,35 mm, destin
12、au grand public (systmes 525-60, 625-50, 1 125-60 et 1250-50) Partie 5: Structures des jeux de caractres (CE1 61 834-5:1998) Aufzeichnung - Videokassettensystem mit digitaler Schrgspuraufzeichnung auf Magnetband 6,35 mm fr den Heimgebrauch (Systeme 525-60, 625-50, 1 125-60 und 1250-50) Teil 5: Das S
13、chriftzeichen- I nf ormat ionss ystem (IEC 61 834-5:1998) This European Standard was approved by CENELEC on 1998-1 0-01. CENELEC members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard wit
14、hout 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 any other langu
15、age 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, Finland, France,
16、 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 Elektrotechnische Normung Centra
17、l Secretariat: rue de Stassart 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 61834-5:1998 E STD-BSI BS EN b1634-5-ENGL 1776 Lb24bb9 074b2bl b73 Page 2 EN 61834-5:1998 Foreword The text of document 1006
18、/167/FDIS, future edition 1 of IEC 61 834-5, prepared 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 61834-5 on 1 998-1 0-0 1 . The following dates were fixed: - latest date by
19、 which the EN has to be implemented at national level by 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 (daw) 200 1 -07-0 1 Annexes designated “normative“ are part of the body
20、 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 61834-5:1998 was approved by CENELEC as a European Standard without any modification. STD-BSI BS EN bL834-5-ENGL L998 I Lb24bbS 074b2b2 52T Pag
21、e 3 EN 61834-5:1998 CONTENTS Clause 1 General . 1.1 Scope 1.2 Normative reference . 1.3 Definitions, symbols and abbreviations . 2 Data structure of the character information system 2.1 Topic . 2.2 Topic unit . 2.3 Page unit . 2.4 Topic header. page header . 2.5 Text unit and text data 3 Packs for t
22、he character information system . 3.1 TOPWPAGE HEADER pack 3.2 TEXT HEADER packs and TEXT packs 3.3 Packs for positioning data 3.4 TEXT flag 4 Full mode 4.1 Main topics and optional topics . 4.2 Menu topic . 4.3 TOC topic 5 Simple mode . 6 Presentation 6.1 Displaying area 6.2 Display mode . 6.3 Char
23、acter space . 6.4 Display format and character size . 6.5 Active position 7 Coding 7.1 The structure of the 8-bit code 7.2 Control codes . 7.3 Code extension techniques 7.4 Coding of DRCS data . 7.5 . Coding of DCS data . Page 5 5 5 5 9 9 10 10 IO 10 10 11 11 11 12 12 12 12 13 14 15 O BSI 1998 STD*B
24、SI BS EN b183q-5-ENGL 1998 E LbZibb7 074b2b3 4bb W Page 4 EN 61834-6:1998 Tables 1 Pack header table : . 2 Display modes 3 Display formats 4 Character size 5 CO control codes except for LSO, LS1, SS2. SS3 . 6 CI control code 7 Designation codes 8 Invocaton codes . 9 OPN-change codes 10 Final byte fo
25、r DRCS 11 Type of LPS . Figures 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Data structure of the character information system . Topic unit and page unit . Packs concerning text Position data in TOC topic Example of TITLE TEXT HEADER pack in MIC . Example of a menu top
26、ic Example of pre-recorded tape . Display image of a TOC Example of TOC topic . Example of pre-recorded tape in simple mode Example of users tape in simple mode . Unit screen and displaying area High density . Code table Active position control codes Code extension method using escape sequence . Dat
27、a structure of DRCS data on tape Standard density . LPS = 73h LPS = 78h LPS = 66h LPS = 33h LPS = 38h LPS = 31h LPS = 30h LPS = 32h . Data structure of DCS data on tape Example of a character information using DCS data 19 20 33 33 37 38 43 43 43 45 45 17 18 20 21 22 23 26 27 28 31 32 32 34 35 36 41
28、42 44 46 46 46 46 46 47 47 47 48 49 Annex ZA Normative references to international publications with 50 their corresponding European publications O BSI 1998 STD-BSI BS EN bL834-5-ENGL 1998 S LbZLibb 07LibZbLi IT2 I Page 5 EN 61834-5:1998 RECORDING - HELICAL-SCAN DIGITAL VIDEO CASSETTE RECORDING (525
29、-60,625-50,1125-60 AND 1250-50 SYSTEMS) - SYSTEM USING 6,35 mm MAGNETIC TAPE FOR CONSUMER USE Part 5: The character information system 1 General 1.1 Scope This part of IEC 61834 specifies the character information system which is applicable to the whole recording system of the helical-scan digital v
30、ideo cassette using 6,35 mm magnetic tape. This system provides the method of recording characters in many languages and moreover provides easy operation for users. 1.2 Normative reference The following standard contains provisions which, through reference in this text, constitutes provisions of thi
31、s part of IEC 61834. At the time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent edition of the standard listed below. Memb
32、ers of IEC and IS0 maintain registers of currently valid International Standards. ISO/IEC 2022: 1994, Information technology - Character code structure and extension techniques 1.3 Definitions, symbols and abbreviations For the purpose of this International Standard, the following definitions or abb
33、reviations apply. DCS: Downloaded character set DJCS: Downloaded Japanese character set DRCS: Dynamically redefinable character set LPS: Logical pixel structure OPN: Option number PD: Pattern data TRM: Transmission mode STD-BSI BS EN bLB3q-5-ENGL 1998 m Lb24bbS 07Lib2b5 239 m Page 6 EN 61834-6:1998
34、2 Data structure of the character information system Character information data are recorded in the optional area of AAUX, VAUX, Subcode and MIC in the form of the pack structure. Figure 1 shows the character information system. Data structure of the full mode: Topic = topic unit 1 Topic unit = topi
35、c header + position data x m + page unit x n Page unit = page header + text unit group = page header + text unit x k Text unit = text header + text data where rn = 1 for TOC topic, m = O for other topics n = 1, 2, 3 k = 1, 2, 3 I = 1, 2, 3 Data structure of the simple mode: Text unit group = text un
36、it x j Text unit = text header + text data where j = 1, 2, 3 2.1 Topic The full mode consists of many topics which are selected by a producer. Each topic has only one topic unit. 2.2 Topic unit Each kind of topic unit has different contents. Each topic unit except for a TOC topic consists of a topic
37、 header and some page units. For the TOC topic, there is position data between the topic header and page unit 1. 2.3 Page unit Each page unit consists of a page header and a text unit group. A text unit group has several text units. There are four display modes per a page which is described in table
38、 2. Therefore, the maximum amount of character data in a page unit is limited to the number of characters which can be displayed at one time. 2.4 Topic header, page header For both the topic and page header, the TOPIWPAGE HEADER pack in the CONTROL group (pack header = 07h) shall be used. The first
39、two bytes in the four-byte pack data of the TOPWPAGE HEADER pack are the topic header part and the latter two bytes are the page header part. - STD-BSI BS EN bL834-5-ENGL 1998 I 1bZqbb9 074b2bb 175 I Page 7 EN 61834-5:1998 In the topic header part, there is a TOPIC TAG. A topic whose TOPIC TAG = O1
40、h is a TOC topic which requires position data. In the page header part, there is a PU No. (page unit number) as shown in figure 2. For a TOC topic, the PU No. shall be increased one by one from OOh, and from 01h for other topics. The details of the TOPIC/PAGE HEADER pack are explained in part 4. Fig
41、ure 2a shows a topic unit for a TOC. The first TOPCIPAGE HEADER pack refers to the topic header. Its TOPIC TAG is O1 h and its PU No. is OOh. Subsequent data are position data which indicate the start positions of the title, chapter, part and so on which are selected by a producer. The subsequent TO
42、PWPAGE HEADER pack is the page header. Its TOPIC TAG is O1 h and PU No. is O1 h. The first two bytes in the four-byte pack data of TOPIC/PAGE HEADER packs within a topic have the same contents for the benefit of verification. Subsequent data is the text unit group which includes text data to display
43、. Figure 2b shows a topic unit which is not a TOC and does not require a position data. Therefore, the first TOPWPAGE HEADER pack consists of the topic header and the first page header. Its TOPIC TAG is not O1 h and its PU No. is O1 h. Figure 2c shows a page unit and a text unit group. A page unit c
44、onsists of a page header and a text unit group which has several text units. 2.5 Text unit and text data A text unit consists of a text header and text data. For tape, text data is formed by a TEXT HEADER pack and TEXT packs which adopt a fixed length pack structure as shown in figure 2c. For the MI
45、C, text data includes a TEXT HEADER pack which adopts a variable length pack structure as shown in figure 3. Text data shall be stored in text units as character codes. 3 Packs for the character information system Some packs are prepared to provide character information. 3.1 TOPWPAGE HEADER pack Thi
46、s is defined in the CONTROL group and the pack header is 07h. 3.2 TEXT HEADER packs and TEXT packs There are eight kinds of TEXT HEADER packs and nine kinds of TEXT packs as shown in figure 3 and table 1. Each TEXT HEADER pack shall be used with the TEXT pack of the same group, when text data is rec
47、orded on tape. Since each group has its own TEXT HEADER pack and TEXT pack, the type of written text data is obvious. For instance, the title text, chapter text and part text may exist in the same VAUX optional area in the same video frame for pre-recorded tape. The most significant four bits of the
48、 pack header can separate the text data to be displayed from text data cited above. Furthermore, each TEXT HEADER pack has its own TEXT TYPE which consists of four bits and defines its text type such as name, memo, station and so on. STD.BSI BS EN bL834-5-ENGL 1998 6 lb24bb 74b2b7 001 m Page 8 EN 61
49、834-6:1998 1 I The last byte (PC4) of the CONTROL TEXT HEADER pack has two types. For the menu topic, PC4 includes 3 bits for the AREA No. and 5 bits for the TOPIC TAG. The menu topic defines the relationship between a topic and a TOPIC TAG. For other use, PC4 shall be FFh. Unused bytes in a TEXT pack shall be filled with OOh which means NUL data as shown in table 5. The details of TEXT HEADER packs are described in part 4. TEXT TYPE The TEXT TYPE .in each TEXT HEADER pack indicates the type of text data as shown in part 4. If the TEXT TYPE i
