1、 I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T Series J TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU Supplement 6 (09/2016) SERIES J: CABLE NETWORKS AND TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS Transmission of ultra high definition tel
2、evision over cable with functions defined in Recommendations ITU-T J.183, ITU-T J.288 and ITU-T J.94 ITU-T J-series Recommendations Supplement 6 J series Supplement 6 (09/2016) i Supplement 6 to ITU-T J-series Recommendations Transmission of ultra high definition television over cable with functions
3、 defined in Recommendations ITU-T J.183, ITU-T J.288 and ITU-T J.94 Summary Supplement 6 to ITU-T J-series Recommendations describes a combination example of functions defined in Recommendations ITU-T J.183, ITU-T J.288 and ITU-T J.94 in order to achieve high speed transmission by channel bonding te
4、chnology for 4K/8K ultra high definition television (UHDTV) distribution over an existing transmission system compliant with Annex C to Recommendation ITU-T J.83. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T J Suppl. 6 2016-09-02 9 11.1002/1000/13241 Keywords Cable TV, ch
5、annel bonding technology, ultra high definition television (UHDTV). * To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, followed by the Recommendations unique ID. For example, http:/handle.itu.int/11.1002/1000/11830-en. ii J series Supplement
6、6 (09/2016) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsi
7、ble 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 Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-
8、T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-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
9、basis with ISO and IEC. NOTE In this publication, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agency. Compliance with this publication is voluntary. However, the publication may contain certain mandatory provi
10、sions (to ensure, e.g., interoperability or applicability) and compliance with the publication is achieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use of such
11、 words does not suggest that compliance with the publication is required of any party. INTELLECTUAL PROPERTY RIGHTSITU draws attention to the possibility that the practice or implementation of this publication may involve the use of a claimed Intellectual Property Right. ITU takes no position concer
12、ning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU members or others outside of the publication development process. As of the date of approval of this publication, ITU had not received notice of intellectual property, protected by patents,
13、which may be required to implement this publication. However, implementers are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2017 All rights reserved. No part of this publication m
14、ay be reproduced, by any means whatsoever, without the prior written permission of ITU. J series Supplement 6 (09/2016) iii Table of Contents Page 1 Scope . 1 2 References . 1 3 Definitions 1 3.1 Terms defined elsewhere 1 3.2 Terms defined in this Supplement 1 4 Abbreviations and acronyms 1 5 Conven
15、tions 1 6 System concept . 2 7 Trial for 8K UHDTV cable TV distribution . 2 Bibliography. 6 J series Supplement 6 (09/2016) 1 Supplement 6 to ITU-T J-series Recommendations Transmission of ultra high definition television over cable with functions defined in Recommendations ITU-T J.183, ITU-T J.288
16、and ITU-T J.94 1 Scope This supplement provides UHDTV cable transmission with functions defined in ITU-T J.183, ITU-T J.288 and ITU-T J.94. 2 References ITU-T J.94 Recommendation ITU-T J.94 (2016), Service information for digital broadcasting in cable television systems. ITU-T J.183 Recommendation I
17、TU-T J.183 (2016), Time-division multiplexing of multiple MPEG-2 transport streams and generic formats of transport streams over cable television systems. ITU-T J.288 Recommendation ITU-T J.288 (2016), Encapsulation of type length value (TLV) packet for cable transmission systems. 3 Definitions None
18、. 3.1 Terms defined elsewhere None. 3.2 Terms defined in this Supplement None. 4 Abbreviations and acronyms This Supplement uses the following abbreviations and acronyms: CNR Carrier-to-Noise Ratio HFC Hybrid Fibre and Coaxial NIT Network Information Table QAM Quadrature Amplitude Modulation TLV Typ
19、e-Length-Value TS Transport Stream TSMF Transport Streams Multiplexing Frame UHDTV Ultra High Definition Television 5 Conventions None. 2 J series Supplement 6 (09/2016) 6 System concept The system concept of UHDTV transmission with functions defined in ITU-T J.183, ITU-T J.288 and ITU-T J.94 is sho
20、wn in Figure 1. At the cable TV headend, an MPEG-2 transport stream (TS) and/or type-length-value (TLV) is input into a transmitter. The network information table (NIT) specified in ITU-T J.94 is inserted into the input MPEG-2 TS while the TLV-NIT specified in ITU-T J.94 is inserted into the input T
21、LV stream. After that, TLV packets are fragmented and encapsulated into a fixed-length packet called a fragmented TLV packet, in accordance with ITU-T J.288. The fragmented TLV packets and/or MPEG-2 TS are multiplexed into the transport streams multiplexing frame (TSMF) specified in ITU-T J.183. Mul
22、tiple QAM carriers transmission system, based on Annex C of b-ITU-T J.83, are used for transmitting them. At the home receiver, each carrier is demodulated. After that, the fragmented TLV packets and/or MPEG-2 TS are de-multiplexed from TSMF. Then, the fragmented TLV packets are restored to the orig
23、inal TLV packets in accordance with ITU-T J.288. Figure 1 System concept 7 Trial for 8K UHDTV cable TV distribution 8K UHDTV cable TV distribution was demonstrated and stably played on an 85-inch 8K LCD display through a commercial large-scale cable network in Tokyo in May 2016. The trial was conduc
24、ted in the hybrid fibre and coaxial (HFC) network shown in Figure 2. Table 1 lists the parameters applied to the transmitted signal of 8K UHDTV. In total, 95 channels, including three channels carrying the 8K UHDTV signal, were frequency division multiplexed and transmitted from the headend. J serie
25、s Supplement 6 (09/2016) 3 Figure 2 Experimental set-up Table 1 Parameters for transmitted signal TLV stream rate 100 Mbit/s Video coding HEVC / H.265 Audio coding MPEG-4 AAC Bandwidth per channel 6 MHz Symbol rate 5.274 Mbaud Bit rate per channel w/o parity bits for FEC 256 QAM: 38.88 Mbps 64 QAM:
26、29.16 Mbps No. of channels Two channels with 256 QAM and one channel with 64 QAM Freq. of multiple QAM channels (Centre frequency (MHz) 256 QAM: 273 MHz, 447 MHz 64 QAM: 635 MHz Figure 3 shows the spectrum of FDM signals measured at the reception site. Figure 4 shows a transmitter based on ITU-T J.1
27、83, ITU-T J.288 and ITU-T J.94. Table 2 lists the carrier-to-noise ratio (CNR) of three signals carrying 8K UHDTV in this trial. The required CNR is 25 dB for 64 QAM and 31.5 dB for 256 QAM before error correction (BER is around 104) in a receiver. The received signals had enough margin of CNR to di
28、stribute more at the subscribers site. As shown in Figures 5 and 6, UHDTV transmission was achieved successfully in a large scale cable TV network in Tokyo. 4 J series Supplement 6 (09/2016) Figure 3 FDM signals at reception site Table 2 CNR of three channels for transmitting 8K UHDTV signal Center
29、freq. (MHz) Modulation CNR (dB) 273 256 QAM 37.0 dB 447 256 QAM 36.0 dB 635 64 QAM 33.4 dB Figure 4 Transmitter at the headend C 312 7 3 M H z2 5 6 Q A MC 6 04 4 7 M H z2 5 6 Q A MU 4 06 3 5 M H z6 4 Q A M9 0 M H z 7 7 0 M H zC e n t e r F r e q .： 475 M H z S p a n : 6 8 0 M H z 1 0 d B/ d i v .0 1
30、02 030405 06 070809 0(dBV)J series Supplement 6 (09/2016) 5 Figure 5 Received UHDTV on 85-inch 8K LCD display Figure 6 Demonstration 6 J series Supplement 6 (09/2016) Bibliography b-ITU-T J.83 Recommendation ITU-T J.83 (2007), Digital multi-programme systems for television, sound and data services f
31、or cable distribution. Printed in Switzerland Geneva, 2017 SERIES OF ITU-T RECOMMENDATIONS Series A Organization of the work of ITU-T Series D Tariff and accounting principles and international telecommunication/ICT economic and policy issues Series E Overall network operation, telephone service, se
32、rvice operation and human factors Series F Non-telephone telecommunication services Series G Transmission systems and media, digital systems and networks Series H Audiovisual and multimedia systems Series I Integrated services digital network Series J Cable networks and transmission of television, s
33、ound programme and other multimedia signals Series K Protection against interference Series L Environment and ICTs, climate change, e-waste, energy efficiency; construction, installation and protection of cables and other elements of outside plant Series M Telecommunication management, including TMN
34、 and network maintenance Series N Maintenance: international sound programme and television transmission circuits Series O Specifications of measuring equipment Series P Telephone transmission quality, telephone installations, local line networks Series Q Switching and signalling, and associated mea
35、surements and tests Series R Telegraph transmission Series S Telegraph services terminal equipment Series T Terminals for telematic services Series U Telegraph switching Series V Data communication over the telephone network Series X Data networks, open system communications and security Series Y Global information infrastructure, Internet protocol aspects, next-generation networks, Internet of Things and smart cities Series Z Languages and general software aspects for telecommunication systems
