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 J.297 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (03/2018) SERIES J: CABLE NETWORKS AND TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS Cable set-top box Requirements and functional specificati
2、on of cable set-top boxes for 4K ultra-high definition television Recommendation ITU-T J.297 Rec. ITU-T J.297 (03/2018) i Recommendation ITU-T J.297 Requirements and functional specification of cable set-top boxes for 4K ultra-high definition television Summary Recommendation ITU-T J.297 specifies r
3、equirements and functional specifications for 4K cable set top boxes (STBs) that enable 4K ultra-high definition television (UHDTV) service reception over cable networks, and considers the compatibility and differences with the existing 2K cable STB. The Recommendation was revised in 2018 mainly to
4、add the multiplex method for type length value (TLV) and channel bonding in the functional specification section, as well as a new high dynamic range (HDR) function for 4K ultra-high definition services. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T J.297 2016-11-06 9 11.1
5、002/1000/13053 2.0 ITU-T J.297 2018-03-16 9 11.1002/1000/13562 Keywords 4K ultra-high definition television (UHDTV); set-top box (STB); multiplex method; high dynamic range (HDR). * To access the Recommendation, type the URL http:/handle.itu.int/ in the address field of your web browser, followed by
6、 the Recommendations unique ID. For example, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T J.297 (03/2018) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications, information and communication technologies (ICT
7、s). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. 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
8、Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-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 inform
9、ation technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a telecommunication administration and a recognized operating agenc
10、y. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of these mandatory provisions are met. The words “shall“ or some
11、other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTSITU draws attention to the possibility that the practice or imp
12、lementation of this Recommendation 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 proce
13、ss. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may not represent the latest information and are therefore strongly
14、 urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2018 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T J.297 (03/2018) iii Table of Contents Page 1 Scope . 1 2 References
15、 . 1 3 Definitions 3 3.1 Terms defined elsewhere 3 3.2 Terms defined in this Recommendation . 3 4 Abbreviations and acronyms 3 5 Conventions 4 6 Overview . 5 6.1 4K cable system 5 6.2 Block diagram of 4K cable STB functions . 5 7 Requirements 6 7.1 QAM-based 4K linear video service 6 7.2 IP-based 4K
16、 linear video service 7 7.3 4K IP-VOD service 7 7.4 Backward compatibility for 2K cable STB 10 8 Functional specifications 10 8.1 Specifications common to QAM-based and IP-based 4K cable STB for linear video services . 10 8.2 Specifications particular to QAM-based and IP-based 4K cable STBs for line
17、ar video service . 13 8.3 Specifications of 4K IP-VOD STB 15 Appendix I Broadcasting standards (Region A) . 18 I.1 ETSI/DVB 18 I.2 IEC/CENELEC . 19 I.3 CENELEC 19 I.4 ISO/IEC 19 Appendix II Broadcasting standards (Region B) 20 II.1 ATSC 20 II.2 IEEE . 21 II.3 SCTE 21 Appendix III Broadcasting standa
18、rds (Region C) . 22 III.1 Broadcasting related specifications for Region C (see clause 8.2.1) . 22 III.2 Tuner (see clause 8.2.1.2) . 24 III.3 External interface (see clauses 8.1.5 and 8.3.5) . 24 III.4 Software management (see clause 8.2.1.5) 24 III.5 Content protection (see clause 8.1.4) . 24 III.
19、6 Decoder for broadcasting type service (see clauses 8.1.1 and 8.1.2) . 25 III.7 Forward error correction (see clause 8.2.2.1) . 26 iv Rec. ITU-T J.297 (03/2018) Page Bibliography. 27 Rec. ITU-T J.297 (03/2018) 1 Recommendation ITU-T J.297 Requirements and functional specification of cable set-top b
20、oxes for 4K ultra-high definition television 1 Scope This Recommendation specifies the requirements and functional specification of cable set-top boxes (STBs) for 4K ultra-high definition television (UHDTV). 2 References The following ITU-T Recommendations and other references contain provisions whi
21、ch, 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; users of this Recommendation are therefore encouraged to investigate the possibility of a
22、pplying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. The reference to a document within this Recommendation does not give it, as a stand-alone document, the status of a Recommendation. IT
23、U-T H.222.0 Recommendation ITU-T H.222.0 (2017) | ISO/IEC 13818-1:2018, Information technology Generic coding of moving pictures and associated audio information: Systems. ITU-T H.262 Recommendation ITU-T H.262 (2012) | ISO/IEC 13818-2: 2013, Information technology Generic coding of moving pictures
24、and associated audio information: Video. ITU-T H.264 Recommendation ITU-T H.264 (2016), Advanced video coding for generic audiovisual services. ISO/IEC 14496-10: 2014, Information technology Coding of audio-visual objects Part 10: Advanced Video Coding. ITU-T H.265 Recommendation ITU-T H.265 (2015),
25、 High efficiency video coding. ISO/IEC 23008-2: 2015, Information technology High efficiency coding and media delivery in heterogeneous environments Part 2: High efficiency video coding. ITU-T H.701 Recommendation ITU-T H.701 (2009), Content delivery error recovery for IPTV services. ITU-T H.721 Rec
26、ommendation ITU-T H.721 (2015), IPTV terminal devices: Basic model. ITU-T H.750 Recommendation ITU-T H.750 (2008), High-level specification of metadata for IPTV services. ITU-T J.83 Recommendation ITU-T J.83 (2007), Digital multi-programme systems for television, sound and data services for cable di
27、stribution. ITU-T J.94 Recommendation ITU-T J.94 (2016), Service information for digital broadcasting in cable television systems. ITU-T J.112 Recommendation ITU-T J.112 (1998), Transmission systems for interactive cable television services. ITU-T J.183 Recommendation ITU-T J.183 (2016), Time-divisi
28、on multiplexing of multiple MPEG-2 transport streams and generic formats of transport streams over cable television systems. 2 Rec. ITU-T J.297 (03/2018) ITU-T J.122 Recommendation ITU-T J.122 (2007), Second-generation transmission systems for interactive cable television services IP cable modems. I
29、TU-T J.222.1 Recommendation ITU-T J.222.1 (2007), Third-generation transmission systems for interactive cable television services IP cable modems: Physical layer specification. ITU-T J.222.2 Recommendation ITU-T J.222.2 (2007), Third-generation transmission systems for interactive cable television s
30、ervices IP cable modems: MAC and Upper Layer protocols. ITU-T J.288 Recommendation ITU-T J.288 (2016), Encapsulation of type-length-value (TLV) packet for cable transmission systems. ITU-T J.295 Recommendation ITU-T J.295 (2012), Functional requirements for a cable set-top box. ITU-T J.296 Recommend
31、ation ITU-T J.296 (2012), Specifications for a hybrid cable set-top box. ITU-T J.1005 Recommendation ITU-T J.1005 (2015), Architecture and requirements of digital rights management (DRM) for cable television multiscreen. ITU-T J.1006 Recommendation ITU-T J.1006 (2016), Specification of IP-VoD DRM fo
32、r cable television multiscreen system in multi-DRM environment. ITU-T Y.1910 Recommendation ITU-T Y.1910 (2008), IPTV functional architecture. ITU-R BT.709 Recommendation ITU-R BT.709-6 (2015), Parameter values for the HDTV standards for production and international programme exchange. ITU-R BT.1869
33、 Recommendation ITU-R BT.1869-0 (2010), Multiplexing scheme for variable-length packets in digital multimedia broadcasting systems. ITU-R BT.2100 Recommendation ITU-R BT.2100-1 (2017), Image parameter values for high dynamic range television for use in production and international programme exchange
34、. ITU-R BT.2020 Recommendation ITU-R BT.2020-2 (2015), Parameter values for ultra-high definition television systems for production and international programme exchange. ISO/IEC 14496-3 ISO/IEC 14496-3:2009, Information technology Coding of audio-visual objects Part 3: Audio. ISO/IEC 14496-12 ISO/IE
35、C 14496-12:2015, Information technology Coding of audio-visual objects Part 12: ISO base media file format. ISO/IEC 13818-7 ISO/IEC 13818-7:2006, Information technology Generic coding of moving pictures and associated audio information Part 7: Advanced Audio Coding (AAC). ISO/IEC 23001-7 ISO/IEC 230
36、01-7:2016, Information technology MPEG systems technologies Part 7: Common encryption in ISO base media file format files. ISO/IEC 23008-1 ISO/IEC 23008-1:2017, Information technology High efficiency coding and media delivery in heterogeneous environments Part 1: MPEG media transport (MMT). Rec. ITU
37、-T J.297 (03/2018) 3 ISO/IEC 23009-1 ISO/IEC 23009-1:2014, Information technology Dynamic adaptive streaming over HTTP (DASH) Part 1: Media presentation description and segment formats. BBF TR069 Broadband Forum (2018), CPE WAN Management Protocol Version 1.4. 3 Definitions 3.1 Terms defined elsewhe
38、re This Recommendation uses the following term defined elsewhere: 3.1.1 ultra-high definition television (UHDTV) ITU-R BT.2020: UHDTV provides viewers with an enhanced visual experience primarily by a wider field of view that covers a considerable part of the human natural visual field with appropri
39、ate screen sizes relevant to usage at home and in public places. Signal formats contributing to increasing the compression efficiency are desirable for UHDTV systems as they have a larger number of pixels than HDTV systems. 3.2 Terms defined in this Recommendation This Recommendation defines the fol
40、lowing terms: 3.2.1 4K UHDTV: This supports 3,840 2,160 resolution and 60p frame frequency specified in ITU-R BT.2020. 3.2.2 remote control unit (RCU): The piece of equipment used to operate a set-top box remotely. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and
41、 acronyms: API Application Program Interface AVC Advanced Video Coding BS Broadcast Satellite television CAS Conditional Access System CDN Content delivery Network CENC Common Encryption CP Content Provider DOCSIS Data Over Cable Service Interface Specifications DRM Digital Rights Management ECM Ent
42、itlement Control Message EME Encrypted Media Extensions EMM Entitlement Management Message FEC Forward Error Correction FTTH Fibre To The Home GUI Graphical User Interface HEVC High Efficiency Video Coding H/E cable television Head-End HFC Hybrid of Fibre-Coaxial HDCP High-bandwidth Digital Content
43、Protection system 4 Rec. ITU-T J.297 (03/2018) HDMI High-Definition Multimedia Interface HDR High Dynamic Range HTML Hypertext Markup Language IP Internet Protocol IPTV Internet Protocol Television LAN Local Area Network MPEG Moving Picture Experts Group MMT MPEG Media Transport MSE Media Source Ext
44、ensions PON Passive Optical Network PSI Program Specific Information QAM Quadrature Amplitude Modulation RCU Remote Control Unit RF Radio Frequency SI Service Information STB Set-Top Box TLV Type Length Value TS Transport Stream TTS Timestamped TS UHDTV Ultra-high Definition Television UI User Inter
45、face VOD Video On Demand 5 Conventions The keywords “is required to“ indicate a requirement which must be strictly followed and from which no deviation is permitted if conformance to this document is to be claimed. The keywords “is recommended“ indicate a requirement which is recommended but which i
46、s not absolutely required. Thus this requirement need not be present to claim conformance. The keywords “is prohibited from“ indicate a requirement which must be strictly followed and from which no deviation is permitted if conformance to this document is to be claimed. The keywords “can optionally“
47、 indicate an optional requirement which is permissible, without implying any sense of being recommended. This term is not intended to imply that the vendors implementation must provide the option and the feature can be optionally enabled by the network operator/service provider. Rather, it means the
48、 vendor may optionally provide the feature and still claim conformance with the specification. In the body of this document and its annexes, the words shall, shall not, should and may sometimes appear, in which case they are to be interpreted, respectively as, is required to, is prohibited from, is
49、recommended and can optionally. The appearance of such phrases or keywords in an appendix or in material explicitly marked as informative are to be interpreted as having no normative intent. Rec. ITU-T J.297 (03/2018) 5 6 Overview 6.1 4K cable system See Figure 6-1 as an example of a 4K cable system. 4K cable content can be obtained from 4K programmes broadcasted via satellite stations. Cable operators may also capture 4K video content by themselves.
