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 9: DVB format The European Standard EN 61834-9:2001 has the status ofa British Standard ICs 33.160.40 BS EN 61 834-912001 Wk
2、 present to the responsible international/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 committe
3、e 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 conta
4、in 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 the “F
5、ind” 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 from leg
6、al obligations. 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 when the document was last issued. O BSI 07 December 2001 ISBN O 580 38764 x EUROPEAN STANDAR
7、D EN 61834-9 NORME EUROPENNE EUROPISCHE NORM Julv 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 9: DVB format (IEC 61 834-912001) Enregistrement - Sys
8、tme de magntoscope numrique cassette balayage hlicoidal utilisant la bande magntique de 6,35 mm, 525-60, 625-50, 1 125-60 et 1250-50) Aufzeich n ungstech n i k - Video kassettensystem mit digitaler Sch rags pu raufzeich n u ng auf Mag netband 6,35 mm fr den Heimgebrauch (Systeme Teil 9: DVB-Format d
9、estin au grand public (systmes Partie 9: Format DVB (CE1 61834-9:2001) 525-60, 625-50, 1 125-60, 1250-50) (IEC 61834-9:2001) This European Standard was approved by CENELEC on 2001-05-01. CENELEC members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for g
10、iving 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 in three officia
11、l 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 electrotechnical committ
12、ees 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 Normalisation Electr
13、otechnique 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 61834-9:2001 E Page 2 EN 61834-92001 Foreword The text o
14、f document 100B/283/FDIS, future edition 1 of IEC 61834-9, 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 EN 61834-9 on 2001-
15、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 - latest date by which the national standards conflicting with the EN have to be withdrawn Annexes designated “normative“ are
16、 part of the body of the standard. In this standard, annex ZA is normative. Annex ZA has been added by CENELEC. 2002-02-01 2004-05-01 Endorsement notice The text of the International Standard IEC 61834-9:2001was approved by CENELEC as a European Standard without any modification. O BSI 07 December 2
17、001 Page 3 EN 61834-92001 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 2.2 Scanner configuration . 7 Programme track data arrangement .
18、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-SBunit 9 5.4 SB-extra-header 9 5.5 Mapping TS packets onto sync blocks . 9 5.6 TSP-extra-header
19、9 5.7 Location of MPEG data 10 5.8 Normal play data 10 5.9 Trick play data . 10 5.1 O Stuffing data 11 5.1 1 Error correction code . 11 6 Subcode signal processing 12 7 System data 12 7.1 AAUX 12 7.2 VAUX 12 7.3 MIC (memory in cassette) 13 7.4 Pack header table for MPEG recording . 13 Data structure
20、 at digital interface . 28 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 3 8 9 O BSI 07 December 2001 Page 4 EN 61834-92001 Page Figure 1 - SB-extra-header Figure 2 - Content of SB-ext
21、ra-header . Figure 4 - TSP-extra-header 31 .32 . .32 Figure 3 - 5-SB-unit Figure 5 - Track format of 25/12,5/6,25 Mbps recording modes Figure 6 - Trick play Figure 7 - Stuffing in 5-SB-units Figure 8 - Stuffing the second TS packet in 5-SB-units Figure 9 - Insertion of Null TS Packet Figure 10 - Stu
22、ffing in the TS Packet . Figure 11 - ECC3 code word . Figure 12 - Interleaving on a 12-track basis (ECC3 block) Figure 13 - Main area of VAUX 35 35 .36 . .36 Figure 14 - Simplifie Figure 15 - Simplifie Figure 16 - Example of constant overall delay . 40 Table 1 - Tape speed and track angle for each r
23、ecording mode . Table 2 - Scanner configuration for multi-mode recorder . Table 3 - Application ID of video area Table 4 - Relationship between number of repetitions, possible search speeds and maximum bit rate . Table 5 - Number of repetitions of trick play data . Table 6 - Duration of subcode flag
24、s Table 8 - Recommended switching points for selection of recording mode . 38 . 30 . 30 . 31 . Table 7 - Duration of MPEG source contro . Table 9 - Maximum NP bit rates for different recording modes 38 Annex ZA (normative) Normative references to international publications with their corresponding E
25、uropean publications 41 O BSI 07 December 2001 Page 5 EN 61834-92001 RECORDING - HELICAL-SCAN DIGITAL VIDEO CASSETTE RECORDING SYSTEM USING 6,351 mm MAGNETIC TAPE 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
26、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 specifications for the recording of single DVB programmes. The DVB data is delivered to the digital video cassette recorder via a digi
27、tal 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 specified 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
28、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 efficient use of the storage capacity of the digital video cassette recorder. In addition to the normal play data stream of DVB recording, one
29、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 = 000b which consists of four areas as described in 4.3.2 of IEC 61834-1 and API = AP3 = 000b. The data structure of MIC is the same as i
30、n 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 revisions of, any of these publications do not apply. H
31、owever, 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 document referred to applies. Members of IEC and IS
32、0 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: General specificafions Amendment 1 O BSI 07 Dece
33、mber 2001 Page 6 EN 61834-92001 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 sysfems IEC 61 834-4:1998, Recording - Helical-scan
34、 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 sysfem using 6,35 mm magnefic fape for consumer use (52
35、5-60, 625-50, 1125-60 and 1250-50 sysfems) - Parf 6: SDL formaf 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 fa fransmission ETS 300 468:1998, Specificafion for Servi
36、ce Informafion (SI) in DVB sysfems EBU SBP 492:1992, Telefexf specificafions 1.3 Abbreviations For the purposes of this part of IEC 61834, the following abbreviations apply. Audio auxiliary data Base-Chaudhuri-Hocquenghem code, one of the well-known error correction AAUX BCH code codes CGMS DCT DTV
37、DVB DVCR ECC ECCI ECC2 ECC3 EIT FEC GF I RD MIC MPML MPEG NP Copy Generation Management System Discrete cosine transform Digital Television (MPEG transmission in USA) (differs from ATV) Digital Video Broadcast (used for organization and the signal) Digital Video Cassette Recorder Error Correction Co
38、de 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 Integrated Receiver Decoder Memory in Cassette Main Profile at Main Level Motion
39、 Pictures Expert Group Normal play O BSI 07 December 2001 Page 7 EN 61834-92001 PAT PCR PID PMT PSI SB SD/HD SI STB TP TP TPH TPL TS TSH TSL TSP VAUX Programme Association Table Programme Clock Reference Programme Identification Programme Map Table Programme-Specific Information Sync block Standard
40、Definition/High Definition (recording modes on DVCR) Service Information Set-Top- Box Track pitch Trick play Higher Trick play speed Lower Trick play speed Transport Stream Most significant part of timestamp-counter value Least sign if ica nt part of tim estam p-cou nter va lu e Transport Stream Pac
41、ket Video Auxiliary data 1.4 Environment and test conditions Same as those of IEC 61834-2. 2 Helical recordings 2.1 One 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 k0,5 %. Tape spee
42、d, recording location and dimensions Record location and dimensions for continuous recording shall be as specified in figure 1 of IEC 61834-2. For recording, dimensions of helical tracks shall be within the tolerances specified in table 3 of IEC 61834-1, except that, where applicable, parameters in
43、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 IEC 61834-2. The track centre lines shall serve as their position references for specifying the pattern on tape. The
44、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. 2.2 Scanner configuration If the recorder supports more than one recording mode, the scanner configuration shall be
45、used as shown in table 2. O BSI 07 December 2001 Page 8 EN 61834-92001 3 Programme track data arrangement 3.1 Labelling convention Same as 3.2 of IEC 61834-2. 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
46、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 bit assignment of API. The reserved bit assignments may be specified in future for new applications. If the audio sector is us
47、ed 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 delivered to the recorder via a digital inte
48、rface, or received from a built-in tuner (IRD). Data for a single programme of the MPEG2 transport stream are recorded on tape for normal Play (NP). In addition to the normal play data stream, one or two special trick play (TP) data streams may optionally be generated and recorded. MPEG2 coded pictu
49、res 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 DVB recording The video area is used for recording the DVB NP and TP data streams. The recording of MPEG2 transport stream data in the video area is indicated in AP2 (se
