1、INTERNATIONAL TELECOMMUNICATION UNION ITU-T TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU J .94 (1 1/98) SERIES J: TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS Ancillary digital services for television transmission Setvice information for digital broadcasting in cable t
2、elevision systems ITU-T Recommendation J.94 (Previously CCITT Recommendation) ITU-T J-SERIES RECOMMENDATIONS TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS General Recommendations General specifications for analogue sound-programme transmission Performance characteristics o
3、f analogue sound-programme circuits Equipment and lines used for analogue sound-programme circuits Digital encoders for analogue sound-programme signals Digital transmission of sound-programme signals Circuits for analogue television transmission Analogue television transmission over metallic lines
4、and interconnection with radio-relay links Digital transmission of television signals J.l-J.9 J.lO-J.19 5.20-5.29 5.30-5.39 J.40-J.49 J.50-J.59 J.60-J.69 J.70-J.79 J.80-5.89 - television Operational requirements and methods for television transmission Interactive systems for digital television distr
5、ibution Transport of MPEG-2 signals on packetised networks Measurement of the quality of service Digital television distribution through local subscriber networks J.100-J.109 J. 1 10-J. 129 J. 130-5.139 J.140-J.149 J. 150-J. 159 For further details, please refer to ITU-T List of Recommendations. ITU
6、-T RECOMMENDATION 5.94 SERVICE INFORMATION FOR DIGITAL BROADCASTING IN CABLE TELEVISION SYSTEMS Summary This Recommendation specifies Service Information (SI) describing the services residing within streams constructed in accordance with IT-T Rec. H.222.0 I ISODEC 13818-1 (MPEG-2 Systems). This Reco
7、mmendation defines the standard protocol for transmission of the relevant SI data tables carried in the MPEG-2 Transport Stream multiplex. , Source ITU-T Recommendation J.94 was prepared by ITU-T Study Group 9 (1997-2000) and was approved under the WTSC Resolution No. 1 procedure on the 19th of Nove
8、mber 1998. I i Recommendation 5.94 (1 1/98) STDmITU-T RECMN J.94-ENGL 1998 4862591 0663825 145 FOREWORD ITU (International Telecommunication Union) is the United Nations Specialized Agency in the field of telecommuni- cations. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent o
9、rgan of the ITU. The ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Conference (WTSC), which meets every four years, esta
10、blishes the topics for study by the ITU-T Study Groups which, in their turn, produce Recommendations on these topics. The approval of Recommendations by the Members of the ITU-T is covered by the procedure laid down in WTSC Resolution No. 1. In some areas of information technology which fall within
11、ITU-Ts purview, the necessary standards are prepared on a collaborative basis with IS0 and IEC. NOTE In this Recommendation the term recognized operating agency (ROA) includes any individual, company, corporation or governmental organization that operates a public correspondence service. The terms A
12、dministration, ROA and public correspondence are defined in the Constitution of the ITU (Geneva, 1992). INTELLECTUAL PROPERTY RIGHTS The ITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. The
13、 IT takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, the ITU had not received notice of intelle
14、ctual property, protected by patents, which may be required to implement this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. o ITU 1999 All rights reserved. No part of this pu
15、blication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. 11 Recommendation 5.94 (11/98) STD-ITU-T RECMN J-qLi-ENGL 1998 48b259L 0bb382h 081 CONTENTS Introduction 1 Scope 2 Referenc
16、es 3 Terms and definitions . 4 Abbreviations and acronyms Annex A - Service Information for digital multi-programme System A . A.l Scope . A.2 References . A.3 Definitions and abbreviations . A.4 Service Information (SI) description . AS Service Information (SI) tables . A.5.1 SI table mechanism . A
17、.5.1.1 Explanation A.5.1.2 AS . 1.3 A.5.1.4 Mapping of sections into Transport Stream (TS) packets . Coding of PD and table-id fields . Repetition rates and random access . A.5.1.5 Scrambling A.5.2 Table definitions Network Information Table (NIT) A.5.2.1 A.5.2.2 A.5.2.3 A.5.2.4 A.5.2.5 A.5.2.6 A.5.
18、2.7 A.5.2.9 A.5.2.10 Selection Information Table (SIT) A.6 Descriptors A.6.1 Descriptor identification and location . A.6.2 Descriptor coding A.6.2.1 Bouquet name descriptor . A.6.2.2 CA identifier descriptor . Bouquet Association Table (BAT) Service Description Table (SDT) Event Information Table (
19、EIT) Time and Date Table (TDT) Time Offset Table (TOT) Running Status Table (RST) . A.5.2.8 Stuffing Table (ST) . Discontinuity Information Table (DIT) . A.6.2.3 A.6.2.4 A.6.2.5 A.6.2.6 A.6.2.7 A.6.2.8 A.6.2.9 A.6.2.10 A.6.2.11 A.6.2.12 A.6.2.13 A.6.2.14 A.6.2.15 A.6.2.16 A.6.2.17 Component descript
20、or . Content descriptor . Country availability descriptor Data broadcast descriptor Delivery system descriptors Extended event descriptor . Frequency list descriptor . Local time offset descriptor . Data broadcast id descriptor Linkage descriptor . Mosaic descriptor Multilingual bouquet name descrip
21、tor . Multilingual component descriptor . Multilingual service name descriptor Multilingual network name descriptor Recommendation 5.94 (11/98) Dage V 1 1 2 5 7 7 7 7 7 8 8 9 9 11 11 11 11 12 14 16 18 20 20 21 22 22 23 23 23 24 24 24 25 26 30 31 31 32 37 38 38 40 41 44 44 45 46 . 111 STD-ITU-T RECMN
22、 J-94-ENGL 1998 4862591 0663827 T18 D A.6.2.18 A.6.2.19 A.6.2.20 A.6.2.21 A.6.2.22 A.6.2.23 A.6.2.24 A.6.2.25 A.6.2.26 A.6.2.27 A.6.2.28 A.6.2.29 A.6.2.30 A.6.2.3 1 A.6.2.32 A.6.2.33 A.6.2.34 Near Video-on-Demand (NVOD) reference descriptor Network name descriptor Parental rating descriptor . Privat
23、e data specifier descriptor Partial Transport Stream (TS) descriptor Short smoothing buffer descriptor . Service descriptor Service list descriptor Service move descriptor Short event descriptor Stream identifier descriptor . Stuffing descriptor . Subtitling descriptor Telephone descriptor . Teletex
24、t descriptor . Time-shifted service descriptor . Time-shifted event descriptor A.7 Storage Media Interoperability (SMI) measures . A.7.1 SMI tables . Discontinuity Information Table (DIT) . Selection Information Table (SIT) A.7.2 SMI descriptors . Partial Transport Stream (TS) descriptor Annex A.A -
25、 Coding of text characters . A.A.l Control codes . A.A.2 Selection of character table . Annex A.B - CRC decoder model . . Appendix A.1 - Conversion between time and date conventions Appendix A.11 - Bibliography . Annex B - Service Information for digital multi-programme System B . Annex C - Service
26、Information for digital multi-programme System C . C.l SI tables . C.2 Descriptor C.2.1 Location and tag value C.2.2 CA descriptor C.2.3 Area specified service descriptor C.2.4 Data coding method descriptor C.3 Character code tables A.7.1.1 A.7.1.2 A.7.2.1 Page 47 48 48 49 49 49 51 52 53 53 54 54 55
27、 55 57 58 58 58 59 59 60 61 61 62 62 62 69 70 71 72 72 72 73 73 74 75 75 75 iv Recommendation 5.94 (11198) Introduction The development of new digital technology has reached the point at which it is evident that they enable digital systems to offer significant advantages, in comparison with conventi
28、onal analogue techniques, in terms of vision and sound quality, spectrum and power efficiency, service flexibility, multimedia convergence and potentially lower equipment costs. Moreover, the use of cable distribution for the delivery of video and audio signals to individual viewers and listeners is
29、 continually growing, and has already become the dominant form of distribution in many parts of the world. It is also evident that these potential benefits can best be achieved through the economies of scale resulting from the widespread use of digital systems designed to be easily implementable on
30、existing infrastructure and which take advantage of the many possible synergies with related audiovisual systems. This Recommendation has three annexes, that provide the specifications for the service information for the three digital television cable systems submitted to the ITU-T. This reflects th
31、e fact that standardization of digital cable television systems is being addressed for the first time by the ITU-T and that a number of systems had been developed and provisionally implemented when this standardization effort was undertaken by the ITU. Administrations and private operators planning
32、the introduction of digital cable television services are encouraged to consider the use of one of the systems described in Annexes A, B and C, and to seek opportunities for further convergence, rather than developing a different system based on the same technologies. Recommendation 5.94 (11198) V S
33、TDnITU-T RECMN J.94-ENGL 1996 4b2591 Obb3829 90 Recommendation 5.94 SERVICE INFORMATION FOR DIGITAL BROADCASTING IN CABLE TELEVISION SYSTEMS (Geneva, 1998) 1 Scope The scope of this Recommendation defines the Service Information that conveys the relevant description of the services contained in a mu
34、ltiplex of audio, video, and data that is distributed by cable networks (e.g. CATV systems). Recommendation J.83 defines the transmission characteristics for digital multi-programme signals distributed through cable networks. NOTE - The service information is specified to be contained within the MPE
35、G-2 transport layer as Program Specific Information (PSI). This mechanism provides some ancillary data capacity in the forward channel, which can be used to accommodate the needs of other services such as program guides (a description of the provision and characteristics of these services is outside
36、 the scope of this Recommendation). Being highly flexible, the MPEG-2 transport layer can be configured to deliver any desired mix of television, sound and data signals (with sound either related or unrelated to the video signal content, and at various possible levels of quality). P This Recommendat
37、ion is intended to ensure that the designers and operators of cable distribution (e.g. CATV) networks carrying multi-programme signals will have the information they need to be able to establish and maintain fully satisfactory networks. It also provides the information needed by the designers and ma
38、nufacturers of equipment (including receivers) for digital multi-programme signals distributed by cable networks. 2 References The following UIT-T Recommendations and other references contain provisions which, through reference in the text, constitute provisions of this Recommendation. At the time o
39、f publication, the editions indicated were valid. All Recommendations and other references are subject to revision; all users of this Recommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A
40、 list of the currently valid ITU-T Recommendations is regularly published. ITU-T Recommendation H.222.0 (1995) I ISOIIEC 13818-1:1996, Informa?ion technology - Generic coding of moving pictures and associated audio information: Systems. (Referred to in Annex A.) IS0 3166:1997, Codes for the represen
41、tation of names of countries and their subdivisions. (Referred to in Annex A.) IS0 639-2:1998, Codes for the representation of names of languages - Part 2: Alpha-3 code. (Referred to in Annex A.) EBU SPB 492 (1992), Teletext specification (625 line Television Systems). (Referred to in Annex A.) ISOI
42、IEC 8859 (All parts), Information technology - Allocation of Service Information (SI) codes for DVB systems. (Referred to in Annex A.) ETR 21 1, Digital Video Broadcasting (DVB); Guidelines on implementation and usage of Service Information (SI). (Referred to in Annex A.) ISOIIEC 10646- 1 : 1993, In
43、formation technology - Universal Multiple-Octet Coded Character Set (UCS) - Part I: Architecture and Basic Multilingual Plane. (Referred to in Annex A.) ISODEC 6937: 1994, Information technology - Coded graphic character set for text communication - Latin alphabet. (Referred to in Annex A.) Recommen
44、dation 5.94 (11198) 1 STD-ITU-T RECMN J-94-ENGL 3998 48b259L 0663830 502 ETR 289, Digital Video Broadcasting (DVB); Support for use of scrambling and Conditional Access (CA) within digital broadcasting systems. (Referred to in Annex A.) IEC Publication 61883 (1998), Consumer audiohide0 equipment - D
45、igital inte$uce. (Parts 1 and 4.) (Referred to in Annex A.) ETR 154, Digital Video Broadcasting (DVB); Implementation guidelines for the use of MPEG-2 Systems, Video and Audio in satellite, cable and terrestrial broadcasting applications. (Referred to in Annex A.) IEEE 1394, High Perjormance Serial
46、Bus. (Referred to in Annex A.) ITU-T Recommendation H.222.0 (1995) I ISO/IEC 13818-1: 1996, Information technology - Generic coding of moving pictures and associated audio information: Systems. ETS 300 468 (1997), Digital broadcasting systems for television, sound and data services; Specification fo
47、r Service Information (SI) in Digital Video Broadcasting (DVB) systems. Terms and definitions This Recommendation defines the following terms: 3.1 3.2 be delivered to the viewer based upon a schedule. 3.3 audio, teletext. 3.4 e.g. Videoguard, Eurocrypt. bouquet: A collection of services marketed as
48、a single entity. broadcaster (SERVICE Provider): An organization which assembles a sequence of events or programmes to component (ELEMENTARY Stream): One or more entities which together make up an event, e.g. video, Conditional Access (CA) system: A system to control subscriber access to services, p
49、rogrammes and events 3.5 wide-band coaxial cable, fibre optics, terrestrial channel of one emitting point. delivery system: The physical medium by which one or more multiplexes are transmitted e.g. satellite system, 3.6 descriptor: A data structure of the format: descriptor-tag, descriptor-length, and a variable amount of data. The tag and length fields are each 8 bits. The length specifies the length of data that begins immediately following the descriptor-length field itself. A descriptor whose descriptor-tag identifies a type not recognized by a particular decoder shall be i
