1、INTERNATIONAL TELECOMMUNICATION UNION ITU=T TELECOMMUNICATION STAN DARDI ZATION SECTOR OF ITU J.84 (032001) SERIES J: CABLE NETWORKS AND TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS Digital transmission of television signals Distribution of digital multi-programme signals
2、 for television, sound and data services through SMATV networks ITU-T Recommendation J.84 (Formerly CCITT Recommendation) ITU-T J-SERIES RECOMMENDATIONS CABLE NETWORKS AND TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS General Recommendations General specifications for anal
3、ogue sound-programme transmission Performance characteristics of 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 tra
4、nsmission Analogue television transmission over metallic lines and interconnection with radio-relay links Digital transmission of television signals Ancillary digital services for television transmission Operational requirements and methods for television transmission Interactive systems for digital
5、 television distribution Transport of MPEG-2 signals on packetised networks Measurement of the quality of service Digital television distribution through local subscriber networks IPCablecom Miscellaneous Application for Interactive Digital Television J. 1-J.9 J. 10-J. 19 J.20-J.29 J.30-J.39 5.40-5.
6、49 J.50-J.59 J.60-J.69 J.70-J.79 J.SoJ.89 J.90-J.99 J. 100-J. 109 J.110-J.129 J. 130-J. 139 J. 140-5.149 J. 150-J. 159 J. 160-J. 179 J. 1 80-J. 199 5.200-5.209 I For further details, please refer to the list of ITU-T Recommendations. ITU-T Recommendation 5.84 Distribution of digital multi-programme
7、signals for television, sound and data services through SMATV networks Summary This Recommendation “Distribution of digital multi-programme signals for television, sound and data services through SMATV networks“ covers the definition of the framing structure, channel coding and modulation for digita
8、l multi-programme signals for television, sound and data services received from a satellite system and distributed in a transparent way through Satellite Master Antenna Television (SMATV) networks. This Recommendation defines the required network architecture for SMATV systems and is closely related
9、 to ITU-R BO. 12 1 1 (applicable to the satellite path) and to ITU-T 5.83 (applicable to the cable path). This Recommendation has four Annexes (A, B, C and D) that provide the specifications for the digital television SMATV systems submitted to the ITU-T. This reflects the fact that standardization
10、of digital SMATV 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. This Recommendation recommends that those implementing new digital multi-pr
11、ogramme services on existing and future SMATV networks should use one of the systems whose framing structure, channel coding and modulation are specified in Annexes A, B, C and D. Source ITU-T Recommendation 5.84 was revised by ITU-T Study Group 9 (2001-2004) and approved under the WTSA Resolution 1
12、 procedure on 9 March 2001. ITU-T 5.84 (03/2001) 1 FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of teIecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for stud
13、ying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study grou
14、ps which, in turn, produce Recommendations on these topics. The approval of IT-T Recommendations is covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with IS
15、0 and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. INTELLECTUAL PROPERTY RIGHTS ITU draws attention to the possibility that the practice or implementation of this Recom
16、mendation may involve the use of a claimed Intellectual Property Right. ITU 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 app
17、roval of this Recommendation, ITU had not received notice of intellectual 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
18、 patent database. o ITU 2001 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from ITU. 11 ITU-T 5.84 (03/2001) CONTENTS 1 2 3 4 4.1 4.2 5 Scope Re
19、ferences Definitions Symbols and abbreviations . Symbols Abbreviations . Digital multi-programme SMATV systems . Annex A . Digital multi-programme SMATV System A . A.l Scope A.2 References A.3 A.4 SMATV System Al Full implementation of SMATV System Al Simplified implementation of SMATV System Al SMA
20、TV distribution system concepts A.4.1 A.4.2 AS SMATV System A2 . A.5.1 SMATV-IF A.5.2 SMATV-S . A.6 MPEG-2 transport layer . A.7 Framing structure Appendix A.1 - Channel model of SMATV distribution systems Channel model response A.I. 1 A.I.2 Definition of adaptive equalization requirements . SMATV S
21、ystem Al - Simulation results . SMATV System A.2 - Simulation results Appendix A.111 - Bit rate consideration for SMATV distribution systems Appendix A.11 - Examples of 64-QAM and QPSK performance with equalizers A.II.1 A.11.2 Appendix A.IV . Annex B - Digital multi-programme SMATV System B . Annex
22、C - Digital multi-programme SMATV System C . SMATV distribution system concept . C.4 SMATV system C(I1) C.l Scope C.2 C.3 SMATV system C(1) ITU-T 5.84 (03/2001) Page 1 1 2 2 2 2 3 5 5 5 5 6 6 6 6 8 8 9 9 9 9 10 11 12 12 16 18 18 19 19 19 19 20 . 111 Page C.5 SMATV system C(II1) 20 C.6 MPEG-2 transpo
23、rt layer . 21 C.7 Framing structure for channel coding . 21 Annex D - Digital multi-programme SMATV System D . D.l Introduction 21 D.2 SMATV VSB system concept 21 D.3 SMATV head-end commonalities 22 22 D.4 Conclusion 21 iv ITU-T 5.84 (03/2001) Introduction The development of new digital technologies
24、 is now reaching the point at which it is evident that they enable digital systems to offer significant advantages, in comparison with conventional analogue techniques, in terms of vision and sound quality, spectrum and power efficiency, service flexibility, multimedia convergence and potentially lo
25、wer equipment costs. Moreover, the use of SMATV distribution for the delivery of video and audio signals to individual viewers and listeners is continually growing, and has already become a significant form of distribution in some parts of the world. It is also evident that these potential benefits
26、can best be achieved through the economies of scale resulting from the widespread adoption of digital systems designed to be easily implementable on existing infrastructure and to take advantage of the many possible synergies with related audiovisual systems. Common features of SMATV networks are th
27、e use of consumer-type equipment and the lack of regular maintenance, and therefore the system ruggedness is a primary consideration. In particular, the SMATV head-end should be transparent to the digital TV multiplex, without any baseband interfacing, thus permitting the use of simple and cost-effe
28、ctive consumer-type head-end equipment. This Recommendation has four Annexes (A, B, C and D) that provide the specifications for the digital SMATV systems submitted to the ITU-T. This reflects the fact that standardization of digital SMATV systems is being addressed for the first time by ITU-T and t
29、hat a number of systems had been developed and provisionally implemented when this standardization effort was undertaken by the ITU. Administrations and private operators planning the introduction of SMATV systems are encouraged to consider the use of one of the systems described in Annexes A, B, C
30、and D and to seek opportunities for further convergence, rather than developing a different system based on the same technologies. This second version of this Recommendation incorporates Amendment 1 and Amendment 2. These amendments brought the following changes with respect to the first edition of
31、this Recommendation: a) Annex C has now full text. In the first edition it was stated that Annex C was under study. b) Annex D takes into account additional VSB modes which are specified in the second edition c) A new Table UJ.84 is added to show the comparison of the digital multi-programme SMATV s
32、ystems. of ITU-T J.83. ITU-T 5.84 (03/2001) V ITU-T Recommendation 5.84 Distribution of digital multi-programme signals for television, sound and data services through SMATV networks 1 Scope The scope of this Recommendation is the definition of the framing structure, channel coding and modulation fo
33、r digital multi-programme signals distributed by SMATV networks, possibly in frequency-division multiplex with existing analogue television signals. NOTE - It should be noted that requirements for some ancillary data capacity in the forward channel, related to the needs of interactive services, can
34、be accommodated in the MPEG-2 transport layer, which is specified for all the systems described in the annexes to this Recommendation (adescription of the provision and characteristics of the return channel is outside the scope of this Recommendation). It should also be noted that the specified MEPG
35、-2 transport layer allows the delivery of a number of digital sound channels, at various possible levels of quality; the content of those channels can be either related or unrelated to the video signal content. This Recommendation is intended to ensure that the designers and installers of SMATV netw
36、orks carrying digital 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 manufacturers of equipment (including receivers) for digital multi-programme signals distri
37、buted by SMATV networks. It is to be noted that this Recommendation is complementary to other Recommendations which define the transmission characteristics for digital multi-programme signals distributed by satellite and cable networks (see References). 2 References The following ITU-T Recommendatio
38、ns and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; all users of this Recommendation are theref
39、ore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. i ITU-T 5.83 (1997), Digital multi-programme systems for television, sound and data
40、services for cable distribution. 2 ITU-R BO. 12 1 1 (1 995), Digital multi-programme emission systems for television, sound and data services for satellites operating in the 11/12 GHz JFequency range. 3 ITU-T H.222.0 (2000) I ISO/IEC 138 18-1 :2000, Information technology - Generic coding of moving
41、pictures and associated audio information: Systems. 4 FORNEY (G.D.): Burst-correcting codes for the classic bursty channel, IEEE Trans. Comm. Tech., COM- 1 9, pp. 772-78 1, October 197 1. 5 ITU-R BO. 1294 (1 997), Common functional requirements for the reception of digital multi-programme television
42、 emissions by satellites operating in the I l/I 2 GHz JFequency range. ITU-R BO. 1408 (1 999), Transmission system for advanced multimedia services provided by integrated services digital broadcasting in a broadcasting-satellite channel. 6 ITU-T 5.84 (03/2001) 1 3 Definitions This Recommendation def
43、ines the following term. 3.1 satellite master antenna television (SMATV) network: A broadband network intended for the distribution of television, sound and data signals received directly from one or more satellites, possibly in fiequency-division multiplex with similar terrestrial UHF or VHF signal
44、s, to households located in one or more adjacent buildings. Where intended also for the distribution of new digital multi-programme television, sound and data services, such networks are known as “Digital SMATV networks“, and the digital configuration made for this purpose is known as a “Digital mul
45、ti-programme SMATV system“. 4 Symbols and abbreviations 4.1 Symbols This Recommendation uses the following symbols: a Roll-off factor f0 Channel centre frequency RS RU RUI T TS Symbol period Symbol rate corresponding to the bilateral Nyquist bandwidth of the modulated signal Useful bit rate after MP
46、EG-2 transport multiplexer Bit rate after RS outer coder Number of bytes which can be corrected in RS error protected packet 4.2 Abbreviations This Recommendation uses the following abbreviations: BB BaseBand BER Bit Error Ratio BPSK Binary Phase Shift Keying BW Bandwidth DTVC Digital Television by
47、Cable EBU European Broadcasting Union ETS European Telecommunication Standard FEC Forward Error Correction FIR Finite Impulse Response IF Intermediate Frequency IRD Integrated Receiver Decoder LNB Low Noise Block LSB Least Significant Bit MPEG Motion Picture Experts Group MSB Most Significant Bit 2
48、ITU-T 5.84 (03/2001) MUX PDH PRBS PSK QAM QEF QPSK RF RS SMATV SMATV-DTM SMATV-IF SMATV-S TDL TDM TDT TV UHF VHF VSB Multiplex Plesiochronous Digital Hierarchy PseudoRandom Binary Sequence Phase Shift Keying Quadrature Amplitude Modulation Quasi Error Free Quaternary Phase Shift Keying Radio Frequen
49、cy Reed-Solomon Satellite Master Antenna Television SMATV system based on Digital TransModulation SMATV system based on distribution at IF SMATV system based on distribution at extended Super Band Tapped Delay Line Time Division Multiplex Transparent Digital Transmodulator Television Ultra High Frequency Very High Frequency Vestigial SideBand 5 Digital multi-programme SMATV systems It is recommended that those wishing to distribute new digital multi-programme services on existing and future SMATV networks should use one of the systems whose framing structure, channel coding an
