1、STDaITU-T REC“ SERIES J SUPP 1-ENGL L998 48b259L DbbD44b TVE W INTERNATIONAL TELECOMMUNICATION UNION ITU-T TE L E COM M U N I CAT I ON STANDARDIZATION SECTOR OF ITU Series J Supplement 1 (1 1/98) SERIES J: TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS Example of linking op
2、tions between annexes of ITU-T Recommendation J.112 and annexes of ITU-T Recommendation J.83 ITU-T J-series Recommendations - Supplement 1 (Previously CCITT Recommendations) STD = ITU-T RECMN SERIES J SUPP 1-ENGL 1996 4Bb25L ObbO44Z 329 ITU-T J-SERIES RECOMMENDATIONS TRANSMISSION OF TELEVISION, SOUN
3、D PROGRAMME AND OTHER MULTIMEDIA SIGNALS General Recommendations General specifications for analogue sound-programme transmission Performance characteristics of analogue sound-programme circuits Equipment and lines used for analogue sound-programme circuits Digital encoders for analogue sound-progra
4、mme signals Digital transmission of sound-programme signals Circuits for analogue television transmission Analogue television transmission over metallic lines and interconnection with radio-relay links Digital transmission of television signals Ancillary digital services for television transmission
5、Operational requirements and methods for television transmission Interactive systems for digital television distribution Transport of MPEG-2 signals on packetised networks Measurement of the quality of service Digital television distribution through local subscriber networks J.l-J.9 J. 1 O-J. 19 J.2
6、0-J.29 J.30-J.39 J.40-J.49 J.50-J.59 J.60-J.69 5.70-5.79 J. 80-J. 89 J.90-J.99 J.100-J.109 J.110-J.129 3.130-J. 139 J. 1 40-J. 1 49 J. 150-J. 159 II For further details, please refer to ITU-T List of Recommendations. SUPPLEMENT 1 TO ITU-T J-SERIES RECOMMENDATIONS EXAMPLE OF LINKING OPTIONS BETWEEN A
7、NNEXES OF ITU-T RECOMMENDATION 5.112 AND ANNEXES OF ITU-T RECOMMENDATION 5.83 Source Supplement 1 to ITU-T J-series Recommendations was prepared by ITU-T Study Group 9 (1997-2000) and was approved under the WTSC Resolution No. 5 procedure on the 19th of November 1998. J series - Supplement 1 (11/98)
8、 1 STDmITlJ-T RECMN SERIES J SUPP L-ENGL 1996 m 46b2592 ObbO444 ?Tir 881 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 organ of the ITU. The I
9、TU-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, establishes the topics for
10、 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 ITU-Ts purview, the ne
11、cessary standards are prepared on a collaborative basis with IS0 and EC. 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 Administration, ROA and
12、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 ITU takes no position
13、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 intellectual property, protec
14、ted 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 publication may be repro
15、duced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the ITU. 11 J series - Supplement 1 (11/98) - - - STD-ITU-T RECMN SERIES J SUPP 1-EMGL 1998 m 48b25L Ob60445 $38 s$ INDEX Page 1 Introduction 1 . 2 3 Alte
16、rnative global parameters for Annex BlJ.112 to achieve linking in Recommendation J.l 12): 1 1 Alternative parameters for B.4.3lJ.112 to achieve linking (the numbering of the subclauses is the same as J series - Supplement 1 (11/98) . 111 Supplement 1 to J-series Recommendations Centre Frequency (f,)
17、 Level EXAMPLE OF LINKING OPTIONS BETWEEN ANNEXES OF ITU-T RECOMMENDATION 5.112 AND ANNEXES OF ITU-T RECOMMENDATION 5.83 1 O0 to 860 MHz k 30 kHz Adjustable over the range 50 to 61 dBmV (Geneva, 1998) Modulation Type Symbol Rate (nominal) 64 QAM 256 QAM 1 Introduction 64 QAM and 256 QAM 6.952 Msymfs
18、 6.952 Msymfs Recommendation J.112 includes the statement in its clause 1 Scope, “There is therefore the possibility that, in application, the features chosen for use with the transmission system described in a particular annex of Recommen- dation 5.83 are not limited to only the corresponding annex
19、 of this Recommendation.“ In particular, this Supplement defines an example of how to use Annex B/J.112 in conjunction with Annex A/J.83, by indicating the alternative parameters required for B.4.3/J.112 to achieve linking. 2 In this example: in all cases, mention of Upstream Bandwidth “5 to 42 MHz“
20、 in Annex B/J.112 shall be read as “5 to 65 MHz“; and all mention of Downstream Bandwidth “95 to 857 MHz“ shall be read as “100 to 860 MHz“ throughout. In the case of Annex NJ.83, all mention of “6 MHz“ shall be read as “8 MHz“ throughout. Alternative global parameters for Annex B/J.112 to achieve l
21、inking 3 Alternative parameters ?or B.4.3/J.112 to achieve linking (the numbering of the subclauses is the same as in Recommendation J. 1 12): B.4.3 Downstream B.4.3.1 Downstream protocol The downstream PMD layer MUST conform to Annex NJ.83. B.4.3.2 Not required. Scaleable interleaving to support lo
22、w latency B.4.3.3 Downstream frequency plan Shall meet national requirements. B.4.3.4 CMTS output electrical The CMTS MUST output an RF modulated signal with the following characteristics: CMTS electrical output (Downstream) I Value I Parameter I 1 Connector I F connector per IPS-SP-406 I J series -
23、 Supplement 1 (1198) 1 STD-ITU-T RECMN SERIES J SUPP 1-ENGL 1996 li 46b2591 Ob60447 ir00 H Byte/symbol mapping, differential coding and baseband filter characteristics are as in Annex AiJ.83. B.4.3.5 Downstream electrical input to CM The CM MUST accept an RF modulated signal with the following chara
24、cteristics: I Parameter Value I Centre Frequency I I O0 to 860 MHz t 30 kHz I Level Range (one channel) Modulation Type -15 dBmV to +I5 dBmV 64 QAM and 256 QAM Symbol Rate (nominal) Total Input Power (40-900 MHz) I Input (load) Impedance 6.952 Msyds (64 QAM) and 6.952 Msyds (256 QAM) e 30 dBmV I 75o
25、hms Input Return Loss Connector 1 6 dB (100-860 MHz) F connector per IPS-SP-406 (common with the output) B.4.3.6 CM BER performance The bit-error-rate performance of a CM MUST be as described in this subclause. B.4.3.6.1 64 QAM B.4.3.6.1.1 64 QAM CM BER performance Implementation loss of the CM MUST
26、 be such that the CM achieves a post-FEC BER less than or equal to operating at a carrier to noise ratio (E&) of 24.5 dB or greater. when B.4.3.6.1.2 64 QAM image rejection performance Performance as described in B.4.3.6.1.1 MUST be met with analogue or digital signal at +10 dBc in any portion of th
27、e RF band other than the adjacent channels. B.4.3.6.1.3 64 QAM adjacent channel performance Performance as described in B.4.3.6.1.1 MUST be met with digital signal at O dBc in the adjacent channels. Performance as described in B.4.3.6.1.1 MUST be met with analogue signal at +10 dBc in the adjacent c
28、hannels. Performance as described in B.4.3.6.1.1, with an additional 0.2 dB allowance, MUST be met with digital signal at +10 dBc in the adjacent channels. 2 J series - Supplement 1 (11198) STD-ITU-T RECMN SERIES J SUPP 1-ENGL 1998 m 4b2591i Obb04413 347 Sa B.4.3.6.2 256 QAM B.4.3.6.2.1 256 QAM CM B
29、ERperformance Implementation loss of the CM MUST be such that the CM achieves a post-FEC BER less than or equal to operating at a carrier to noise ratio (E&,) of 31 dB or greater, with input signals greater than -6 dBmV. B.4.3.6.2.2 Performance as described in B.4.3.6.2.1 MUST be met with analogue o
30、r digital signal at +10 dBc in any portion of the RF band other than the adjacent channels. when 256 QAM image rejection performance B.4.3.6.2.3 256 QAM adjacent channel performance Performance as described in B.4.3.6.2.1 MUST be met with analogue or digital signal at O dBc in the adjacent channels.
31、 Performance as described in B.4.3.6.2.1, with an additional 0.5 dB allowance, MUST be met with analogue signal at +10 dBc in the adjacent channels. Performance as described in B.4.3.6.2.1, with an additional 1.0 dB allowance, MUST be met with digital signal at +10 dBc in the adjacent channels. J se
32、ries - Supplement 1 (11/98) 3 Series A Series B Series C Series D Series E Series F Series G Series H Series I Series J Series K Series L Series M Series N Series O Series P Series Q Series R Series S Series T Series U Series V Series X Series Y Series Z ITU-T RECOMMENDATIONS SERIES Organization of
33、the work of the ITU-T Means of expression: definitions, symbols, classification General telecommunication statistics General tariff principles Overall network operation, telephone service, service operation and human factors Non-telephone telecommunication services Transmission systems and media, di
34、gital systems and networks Audiovisual and multimedia systems Integrated services digital network Transmission of television, sound programme and other multimedia signals Protection against interference Construction, installation and protection of cables and other elements of outside plant TMN and n
35、etwork maintenance: international transmission systems, telephone circuits, telegraphy, facsimile and leased circuits Maintenance: international sound programme and television transmission circuits Specifications of measuring equipment Telephone transmission quality, telephone installations, local l
36、ine networks Switching and signalling Telegraph transmission Telegraph services terminal equipment Terminals for telematic services Telegraph switching Data communication over the telephone network Data networks and open system communications Global information infrastructure Languages and general software aspects for telecommunication systems lllllllllllllllllllllllllllllllllll *I 5602.k Printed in Switzerland Geneva, 1999
