1、BRITISH STANDARD Recording Helical-scan digital video cassette recording system using 6,35 mm magnetic tape tor consumer use (525-60,625950, 1125-60 and 1250-50 systems) Part 10: DTV format The European Standard EN 61834-10:2001 has the status ofa British Standard ICs 33.160.40 BS EN IEC 61834-10:20
2、01 61834-10:2001 Wk present to the responsible 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 represented on this com
3、mittee 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, publications may
4、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”, or by using t
5、he “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 immunity fro
6、m legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 43 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. O BSI 30 November 2001 ISBN O 580 38732 I EUROPEAN STA
7、NDARD EN 61 834-1 O NORME EUROPENNE EUROPISCHE NORM Mav 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 IO: DTV format (IEC 61 834-1 0:2001) Enregistrem
8、ent - Systme de magntoscope numrique cassette balayage hlicoidal utilisant la bande magntique de 6,35 mm, destin au grand public (systmes 525-60, 625-50, 1125-60 et Partie IO: Format DTV 1250-50) (CE1 61834-1 0:2001) Aufzeich n ungstech n i k - Video kassettensystem mit digitaler Sch rags pu raufzei
9、ch n u ng auf Magnetband 6,35 mm fr den Heimgebrauch (Systeme 525-60, 625-50, 1 125-60 und 1250-50) Teil IO: DTV-Format (IEC 61834-10:2001) This European Standard was approved by CENELEC on 2001-04-01. CENELEC members are bound to comply with the CENKENELEC Internal Regulations which stipulate the c
10、onditions 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 exists i
11、n 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 electrote
12、chnical 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 Norma
13、lisation Electrotechnique Europisches Komitee fr 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 61834-10:2001 E Page 2 EN 61834-10:2001 F
14、oreword The text of document 100B/282/FDIS, future edition 1 of IEC 61834-10, prepared by SC IOOB, Audio, video and multimedia information storage systems, 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
15、EN 61834-10 on 2001-04-01. 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 - latest date by which the national standards conflicting with the EN have to be withdrawn Annexes desig
16、nated “normative“ are part of the body of the standard. In this standard, annex ZA is normative. Annex ZA has been added by CENELEC. (dop) 2002-01-01 (dow) 2004-04-01 Endorsement not i ce The text of the International Standard IEC 61834-10:2001 was approved by CENELEC as a European Standard without
17、any modification. O BSI 30 November 2001 Page 3 EN 61834-10:2001 CONTENTS 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 7 Programme track data a
18、rrangement 8 3.1 Labelling convention 8 3.2 Audio sector 8 3.3 Video sector 8 3.4 Subcode sector 8 Audio signal processing . 8 DTV signal processing . 8 5.1 Introduction 8 5.2 Formatting for DTV recording . 8 5.3 5-SB unit 9 5.4 SB-extra-header . 9 5.5 Mapping TS packets onto sync blocks 9 5.6 TSP-e
19、xtra-header . 9 5.7 Location of MPEG data 10 5.8 Normal play data . 1 0 5.9 Trick play data 1 0 5.1 O Stuffing data . 11 5.1 1 Error correction code 6 Subcode signal processing 7 System data 12 7.1 AAUX 12 7.2 VAUX 13 2.2 Scanner configuration 7 3 4 5 . 8 9 Data structure at digital interface . 29 R
20、equirements and recommendations . 30 9.1 Selecting the recording mode 30 9.2 Buffer requirements 30 9.3 Deriving the timestamp from the TP-extra-header . 31 Bibliography 42 Annex ZA (normative) Normative references to international publications with their corresponding European publications . 43 O B
21、SI 30 November 2001 Page 4 EN 61834-10:2001 Page Figure 1 . SB-extra-header 32 Figure 2 . Content of SB-extra-header . 33 Figure 3 . 5-SB unit 33 Figure 4 . TSP-extra-header 34 Figure 5 -Track format of 25/12,5/6, 25 Mbps recording modes . 35 Figure 6 . Trick play data areas and repetition cycle 36
22、Figure 7 . Stuffing in 5-SB units 37 37 37 Figure 10 . Stuffing in the TS packet . 37 Figure 11 . ECC3 code word . 38 Figure 12 . Interleaving on a 10-track basis (ECC3 block) . 38 Figure 13 . Main area of VAUX . 39 Figure 14 . Simplified block diagram of record situation . 40 Figure 15 . Simplified
23、 block diagram of playback situation . 41 Figure 16 . Example of constant overall delay 41 Figure 8 . Stuffing the second TS packet in 5-SB units Figure 9 . Insertion of null TS packet Table 1 . Tape speed and track angle for each recording mode . 32 Table 2 . Scanner configuration for multi-mode re
24、corder . 32 Table 3 . Application ID of video area 32 Table 4 . Relationship between number of repetitions, possible search speeds and maximum bit rate . 36 Table 5 . Number of repetitions of trick play data 36 Table 6 . Duration of subcode flags 38 Table 7 . Duration of MPEG Source Control Pack 39
25、Table 8 . Recommended switching points for selection of recording mode . 40 Table 9 . Maximum NP bit rates for different recording modes . 40 O BSI 30 November 2001 Page 5 EN 61834-10:2001 RECORDING - HELICAL-SCAN DIGITAL VIDEO CASSETTE RECORDING SYSTEM USING 6,351 mm MAGNETIC TAPE FOR CONSUMER USE
26、(525-60, 625-50, 1125-60 and 1250-50 systems) - Part IO: DTV 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 the specification
27、s for the recording of single DTV programmes. The DTV data is delivered to the digital video cassette recorder via a digital interface or by a built-in tuner (IRD). The DTV data consists of an MPEG2 transport stream containing one or more programmes. In DTV, video signal coding is based on MPEG2. On
28、e 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 DTV programmes, several recording modes are specified in order to make efficient use of the storage capacity of the digital video cassette recorder. In addition to
29、 the normal play data stream of DTV recording, one or two special trick play data streams may optionally be generated and recorded in the video area. In this part, the data structure of a track is defined by APT = 000b which consists of four areas as described in 4.3.2 of IEC 61834-1 and API = AP3 =
30、 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 provisions of this part of IEC 61834. For dated references, subsequent amendments to, or revisi
31、ons 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 documents indicated below. For undated references, the latest edition of the normative do
32、cument referred to applies. Members of IEC and IS0 maintain registers of currently valid International Standards. IEC 61 834-1 :I 998, 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 1:
33、 General specificafions Amendment 1 O BSI 30 November 2001 Page 6 EN 61834-10:2001 IEC 61 834-2: 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 2: SD formaf for 525-60 and 625-50
34、 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 confenfs IEC 61 834-6, Recording - Helical-scan digifal video casseffe recording sy
35、sfem using 6,35 mm magnefic fape for consumer use (525-60, 625-50, 1125-60 and 1250-50 sysfems) - Parf 6: SDL formaf 1) IEC 61883-1 :1998, Consumer audiolvideo equipmenf - Digifal inferface - Parf 1: General IEC 61883-4:1998, Consumer audiolvideo equipmenf - Digifal inferface - Parf 4: MPEG2-TS da f
36、a fransmission ETS 300 468:1998, Specificafion for Service Informafion (SI) in DVB sysfems EBU SPB 492:1992, Telefexf specificafions 1.3 Abbreviations For the purposes of this part of IEC 61834, the following abbreviations apply. AAUX: BCH: CGMS: DTV: DVB: DVCR: DCT ECC: ECCI : ECC2: ECC3: EIT: FEC:
37、 GF: IRD: MIC: MPML: MPHL: MPEG: NP: Audio auxiliary data Base-Chaudhuri-Hocquenghem code, one of the well-known error correction codes Copy Generation Management System Digital Television (MPEG transmission in USA) (differs from ATV) Digital Video Broadcast (used for organization and the signal) Di
38、gital Video Cassette Recorder Discrete cosine transform Error Correction Code Inner error correction (within the SB) Outer error correction (within one track) Extra outer error correction (several tracks) Event Information Table Forward Error Correction (used in MPEG transmission) Galois field Integ
39、rated Receiver Decoder Memory in Cassette Main Profile at Main Level Main Profile at High Level Motion Pictures Expert Group Normal play To be published. O BSI 30 November 2001 Page 7 EN 61834-10:2001 PAT: PCR: PID: PMT: PSI: SB: SD/HD: SI: STB: Tp: TP: TPH: TPL: TS: TSH: TSL: TSP: VAUX: Programme A
40、ssociation Table Programme Clock Reference Programme Identification Programme Map Table Programme Specific Information Sync block Standard Definition/High Definition (recording modes on DVCR) Service Information Set-Top-Box Track pitch Trick play Higher Trick play speed Lower Trick play speed Transp
41、ort Stream Most significant part of timestamp-counter value Least s ig n if ica nt part of tim est a m p-co u n t er va I u e Transport Stream Packet Video auxiliary data 1.4 Environment and test conditions Same as IEC 61834-2. 2 Helical recordings 2.1 Tape speed, recording location and dimensions O
42、ne of three recording 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 I0,5 %. Record location and dimensions for continuous recording shall be as specified in figure 1 of IEC 61834-2. For recording, dimen
43、sions of helical tracks shall be within the tolerances specified in the 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 tab
44、le 1 (525-60 system) of IEC 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
45、as those in IEC 61834-2. 2.2 Scanner configuration If the recorder supports more than one recording mode, the scanner configuration shall be used as shown in table 2. O BSI 30 November 2001 Page 8 EN 61834-10:2001 3 Programme track data arrangement 3.1 Labelling convention Same as 3.2 of IEC 61834-2
46、. 3.2 Audio sector 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
47、indicated in the bit assignment of API. 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 DTV signal processing 5.1 Introduction The DTV data format is based
48、on main profile. The transport stream packets are from a built-in tuner (IRD). Data for a single programme of the In addition to the normal play data MPEG2 transport stream packets of 188 bytes in length at delivered to the recorder via a digital interface or received MPEG2 transport stream are reco
49、rded on tape for normal play stream, one or two special trick play (TP) data streams may optionally be generated and recorded MPEG2 coded pictures are more sensitive to errors than pictures coded according to the SD specifications of IEC 61 834-2. Therefore, optionally, additional ECC may be applied to improve error correction capability for the MPEG2 data on tape. In many cases, the recording bit rate does not match the bit rate of NP and TP data. In this situation, stuffing data shall be recorded for compensation. 5.2 Formatting for DTV recording The video area is us
