1、BRITISH STANDARD BS EN 61834-9:2001 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 9: DVB format The European Standard EN 61834-9:2001 has the status of a British Standard ICS 33.160.40 N
2、O COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 61834-9:2001 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 Strategy Committee on 07
3、 December 2001 BSI 07 December 2001 ISBN 0 580 38764 x National foreword This British Standard is the official English language version of EN 61834-9:2001. It is identical with IEC 61834-9:2001 The UK participation in its preparation was entrusted to Technical Committee EPL/100, Audio, video and mul
4、timedia 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 renumbered as IE
5、C 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 St
6、andards 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 responsibl
7、e 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 change, and keep the
8、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 41, and a back cover. The BSI copyright date displayed in this document indicates
9、 when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEAN STANDARD EN 61834-9 NORME EUROPENNE EUROPISCHE NORM July 2001 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr
10、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 61834-9:2001 E ICS 33.160.40 English version Recording - Helical-scan digital video cassette
11、 recording system using 6,35 mm magnetic tape for consumer use (525-60, 625-50, 1125-60 and 1250-50 systems) Part 9: DVB format (IEC 61834-9:2001) Enregistrement Systme de magntoscope numrique cassette balayage hlicodal utilisant la bande magntique de 6,35 mm, destin au grand public (systmes 525-60,
12、 625-50, 1125-60 et 1250-50) Partie 9: Format DVB (CEI 61834-9:2001) Aufzeichnungstechnik - Videokassettensystem mit digitaler Schrgspuraufzeichnung auf Magnetband 6,35 mm fr den Heimgebrauch (Systeme 525-60, 625-50, 1125-60, 1250-50) Teil 9: DVB-Format (IEC 61834-9:2001) This European Standard was
13、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 references concerning such
14、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 member into its own lan
15、guage 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, Netherlands, Norway, Portugal,
16、 Spain, Sweden, Switzerland and United Kingdom.Foreword The text of document 100B/283/FDIS, future edition 1 of IEC 61834-9, prepared by SC 100B, Audio, video and multimedia information storage systems, of IEC TC 100, Audio, video and multimedia systems and equipment, was submitted to the IEC-CENELE
17、C parallel vote and was approved by CENELEC as EN 61834-9 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 61834-9:2001was approved by
19、 CENELEC as a European Standard without any modification. _ Page2 EN618349:2001 BSI07December2001CONTENTS Page Clause 1 General 5 1.1 Scope. 5 1.2 Normative references 5 1.3 Abbreviations 6 1.4 Environment and test conditions 7 2 Helical recordings 7 2.1 Tape speed, recording location and dimensions
20、 7 2.2 Scanner configuration . 7 3 Programme track data arrangement . 8 3.1 Labelling convention . 8 3.2 Audio sector 8 3.3 Video sector 8 3.4 Subcode sector. 8 4 Audio signal processing . 8 5 DVB signal processing . 8 5.1 Introduction. 8 5.2 Formatting for DVB recording 8 5.3 5_SB unit 9 5.4 SB_ext
21、ra_header 9 5.5 Mapping TS packets onto sync blocks. 9 5.6 TSP_extra_header 9 5.7 Location of MPEG data 10 5.8 Normal play data10 5.9 Trick play data .10 5.10 Stuffing data 11 5.11 Error correction code .11 6 Subcode signal processing12 7 System data12 7.1 AAUX 12 7.2 VAUX 12 7.3 MIC (memory in cass
22、ette) 13 7.4 Pack header table for MPEG recording.13 8 Data structure at digital interface.28 9 Requirements and recommendations.28 9.1 Selecting the recording mode.28 9.2 Buffer requirements .28 9.3 Deriving the timestamp from the TP_extra_header .30 Page3 EN618349:2001 BSI07December200161834-9 IEC
23、:2001 4 Page Figure 1 SB_extra_header 31 Figure 2 Content of SB_extra_header .32 Figure 3 5_SB_unit.32 Figure 4 TSP_extra_header33 Figure 5 Track format of 25/12,5/6,25 Mbps recording modes .33 Figure 6 Trick play data areas and repetition cycle34 Figure 7 Stuffing in 5_SB_units.35 Figure 8 Stuffing
24、 the second TS packet in 5_SB_units 35 Figure 9 Insertion of Null TS Packet35 Figure 10 Stuffing in the TS Packet.36 Figure 11 ECC3 code word.36 Figure 12 Interleaving on a 12-track basis (ECC3 block) .36 Figure 13 Main area of VAUX .37 Figure 14 Simplified block diagram of record situation.39 Figur
25、e 15 Simplified block diagram of playback situation.39 Figure 16 Example of constant overall delay .40 Table 1 Tape speed and track angle for each recording mode.30 Table 2 Scanner configuration for multi-mode recorder .30 Table 3 Application ID of video area31 Table 4 Relationship between number of
26、 repetitions, possible search speeds and maximum bit rate.34 Table 5 Number of repetitions of trick play data 35 Table 6 Duration of subcode flags.37 Table 7 Duration of MPEG source control pack .38 Table 8 Recommended switching points for selection of recording mode.38 Table 9 Maximum NP bit rates
27、for different recording modes.38 Annex ZA (normative) Normative references to international publications with their corresponding European publications 41 Page4 EN618349:2001 BSI07December200161834-9 IEC:2001 5 RECORDING HELICAL-SCAN DIGITAL VIDEO CASSETTE RECORDING SYSTEM USING 6,35 mm MAGNETIC TAP
28、E FOR CONSUMER USE (525-60, 625-50, 1125-60 and 1250-50 systems) Part 9: DVB format 1 General 1.1 Scope This part of IEC 61834 specifies the content, format and recording method for the data blocks forming the helical records on the tape containing audio, video and system data. This part describes t
29、he specifications for the recording of single DVB programmes. The DVB data is delivered to the digital video cassette recorder via a digital interface or by a built-in tuner (IRD). The DVB data consist of an MPEG2 transport stream containing one or more programmes. In DVB, the MPEG2 MPML is specifie
30、d to encode the video signal. The maximum bit rate for the video signal is 15 Mbps. One programme may consist of one video bit stream or several audio bit streams and data bit streams. Due to the varied bit rates of single DVB programmes, several recording modes are specified in order to make effici
31、ent use of the storage capacity of the digital video cassette recorder. In addition to the normal play data stream of DVB recording, one or two special trick play data streams may optionally be generated and recorded in the video area. In this part 9, the data structure of a track is defined by APT
32、= 000b which consists of four areas as described in 4.3.2 of IEC 61834-1 and AP1 = AP3 = 000b. The data structure of MIC is the same as in clause 10 of IEC 61834-2. 1.2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisi
33、ons 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 editions of the normative d
34、ocuments 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 system using 6,35 mm mag
35、netic tape for consumer use (525-60, 625-50, 1125-60 and 1250-50 systems) Part 1: General specifications Amendment 1 Page5 EN618349:2001 BSI07December200161834-9 IEC:2001 6 IEC 61834-2:1998, Recording Helical-scan digital video cassette recording system using 6,35 mm magnetic tape for consumer use (
36、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 consumer use (525-60, 625-50, 1125-60 and 1250-50 systems) Part 4: Pack header table and conte
37、nts IEC 61834-6, 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 6: SDL format IEC 61883-1:1998, Consumer audio/video equipment Digital interface Part 1: General IEC 61883-4:1998, Consumer
38、audio/video equipment Digital interface Part 4: MPEG2-TS data transmission ETS 300 468:1998, Specification for Service Information (SI) in DVB systems EBU SBP 492:1992, Teletext specifications 1.3 Abbreviations For the purposes of this part of IEC 61834, the following abbreviations apply. AAUX Audio
39、 auxiliary data BCH code Base-Chaudhuri-Hocquenghem code, one of the well-known error correction codes CGMS Copy Generation Management System DCT Discrete cosine transform DTV Digital Television (MPEG transmission in USA) (differs from ATV) DVB Digital Video Broadcast (used for organization and the
40、signal) DVCR Digital Video Cassette Recorder ECC Error Correction Code ECC1 Inner error correction (within the SB) ECC2 Outer error correction (within one track) ECC3 Extra outer error correction (several tracks) EIT Event Information Table FEC Forward Error Correction (used in MPEG transmission) GF
41、 Galois field IRD Integrated Receiver Decoder MIC Memory in Cassette MPML Main Profile at Main Level MPEG Motion Pictures Expert Group NP Normal play Page6 EN618349:2001 BSI07December200161834-9 IEC:2001 7 PAT Programme Association Table PCR Programme Clock Reference PID Programme Identification PMT
42、 Programme Map Table PSI Programme-Specific Information SB Sync block SD/HD Standard Definition/High Definition (recording modes on DVCR) SI Service Information STB Set-Top-Box Tp Track pitch TP Trick play TPH Higher Trick play speed TPL Lower Trick play speed TS Transport Stream TSH Most significan
43、t part of timestamp_counter value TSL Least significant part of timestamp_counter value TSP Transport Stream Packet VAUX Video Auxiliary data 1.4 Environment and test conditions Same as those of IEC 61834-2. 2 Helical recordings 2.1 Tape speed, recording location and dimensions One of three recordin
44、g modes can be used. The tape speed and track angle depend on the recording mode as shown in table 1. The tape speed tolerance shall be less than 0,5 %. Record location and dimensions for continuous recording shall be as specified in figure 1 of IEC 61834-2. For recording, dimensions of helical trac
45、ks shall be within the tolerances specified in table 3 of IEC 61834-1, except that, where applicable, parameters in table 1 shall override those in table 3 of IEC 61834-1. Each sector location from the start of the SSA shall be as specified in figure 2 of IEC 61834-2 and table 2 (625-50 system) of I
46、EC 61834-2. The track centre lines shall serve as their position references for specifying the pattern on tape. The values for the effective area upper edge, record and playback guarantee, overwrite margin (Om) and switching margin for recording amplifiers shall be the same as those in IEC 61834-2.
47、2.2 Scanner configuration If the recorder supports more than one recording mode, the scanner configuration shall be used as shown in table 2. Page7 EN618349:2001 BSI07December200161834-9 IEC:2001 8 3 Programme track data arrangement 3.1 Labelling convention Same as 3.2 of IEC 61834-2. 3.2 Audio sect
48、or Same as 3.3 of IEC 61834-2. 3.3 Video sector Same as 3.4 of IEC 61834-2, except AP2 as shown in table 3. 3.4 Subcode sector Same as 3.5 of IEC 61834-2. 4 Audio signal processing The audio sector may be used for recording audio data or for recording other application data. This is indicated in the
49、 bit assignment of AP1. The reserved bit assignments may be specified in future for new applications. If the audio sector is used for audio data, the track arrangement and processing shall comply with IEC 61834-2. 5 DVB signal processing 5.1 Introduction The DVB data format is based on MPEG2 transport stream packets of 188 bytes in length at MPML. The transport stream packets are
