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.1006 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (10/2016) SERIES J: CABLE NETWORKS AND TRANSMISSION OF TELEVISION, SOUND PROGRAMME AND OTHER MULTIMEDIA SIGNALS Conditional access and protection Digital rights managem
2、ent for cable television multiscreen service Specification of IP-VoD DRM for cable television multiscreen system in multi-DRM environment Recommendation ITU-T J.1006 Rec. ITU-T J.1006 (10/2016) i Recommendation ITU-T J.1006 Specification of IP-VoD DRM for cable television multiscreen system in multi
3、-DRM environment Summary Recommendation ITU-T J.1006 describes the specification of IP-VoD DRM for cable television multiscreen system in multi-DRM environment which includes an encryption system commonly adopted to multiple DRMs. History Edition Recommendation Approval Study Group Unique ID* 1.0 IT
4、U-T J.1006 2016-10-14 9 11.1002/1000/13055 Keywords Common encryption, IP-VoD, multi-DRM. * 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. i
5、i Rec. ITU-T J.1006 (10/2016) 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.
6、 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 Assembly (WTSA), which meets every four years, establishes the topics for
7、 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 information technology which fall within ITU-Ts purview, the necessary standards are prepared o
8、n 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 agency. Compliance with this Recommendation is voluntary. However, the Recommendation may cont
9、ain 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 other obligatory language such as “must“ and the negative equivalents are used to express
10、 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 implementation of this Recommendation may involve the use of a claimed Intellectual Property
11、 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 approval of this Recommendation, ITU had received notice of intelle
12、ctual 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 urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2017 All right
13、s reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T J.1006 (10/2016) iii Table of Contents Page 1 Scope . 1 2 References . 1 3 Definitions 2 3.1 Terms defined elsewhere 2 3.2 Terms defined in this Recommendation
14、. 2 4 Abbreviations and acronyms 2 5 Conventions 3 6 Multi-DRM specifications for IP-VoD multiscreen service . 3 6.1 General . 3 6.2 Encryption mode 3 6.3 Encryption of different representations 4 6.4 Key rotation 4 Annex A Work flow of key hierarchy method for key rotation 5 Appendix I Overview of
15、IP-VoD multi-DRM 7 Appendix II Common encryption . 8 Appendix III IP-VoD content flow . 10 Appendix IV Protocol Stack for IP-VoD over cable TV network in multi-DRM 11 Bibliography. 12 iv Rec. ITU-T J.1006 (10/2016) Introduction IP-based video on demand (VoD) service which is available inside and out
16、side of homes will inevitably increase the data traffic of media streaming and downloading over IP networks. Although video delivery has been done with HTTP streaming methods, there are no compatibilities among the methods. Consequently, ISO/IEC has standardized ISO/IEC 23009-1 which has a feature t
17、hat dynamically adapts the transmission rate. Digital rights management (DRM) technology for content right protection is used in combination with device authentication. ITU-T has issued a Recommendation for architecture and requirements of DRM for cable television multiscreen ITU-T J.1005. Several t
18、ypes of DRM methods are currently deployed by industries and industry groups, and each method closely depends on content holders right protection policy. In addition, because cable television multiscreen system can use multiple DRM methods, the contents delivery under the environment is expected to
19、be simple as much as is possible. For example, content encryption scheme ISO/IEC 23001-7 is commonly used among DRM methods. Common encryption scheme has advantages to reduce storage requirements and bandwidth requirements within IP networks located between cable platform and content delivery networ
20、k (CDN) because of the content that is encrypted once for DRMs. The effectiveness of ISO/IEC 23001-7 is very similar to the one of Simulcrypt (see b-ETSI TS 103 197). The structural relationship of cable platform and CDN is referred to in Appendix I. Rec. ITU-T J.1006 (10/2016) 1 Recommendation ITU-
21、T J.1006 Specification of IP-VoD DRM for cable television multiscreen system in multi-DRM environment 1 Scope This Recommendation describes the specification of IP-VoD DRM for cable television multiscreen system in a multi-DRM environment which includes an encryption system commonly adopted to multi
22、ple DRMs. In particular, this Recommendation specifies multi-DRM based on common encryption ISO/IEC 23001-7 which can be categorized as a common communication interface type among the multi-DRM types that are defined in Appendix III of ITU-T J.1005. For stream transmission technique ISO/IEC 23009-1
23、shall be used and MPEG-2 TS is optionally used. This Recommendation does not include the details of MPEG-2 TS specified by ITU-T H.262. 2 References The following ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recomm
24、endation. 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 applying the most recent edition of the Recommendations and other referen
25、ces 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. ITU-T H.262 Recommendation ITU-T H.262 (2012) | ISO/IEC 13818-2:2013, Info
26、rmation technology Generic coding of moving pictures and associated audio information: Video. ITU-T H.264 Recommendation ITU-T H.264 (2016) | ISO/IEC 14496-10:2012, Advanced video coding for generic audiovisual services. ITU-T H.265 Recommendation ITU-T H.265 (2015) | ISO/IEC 23008-2 (2013), High ef
27、ficiency video coding. ITU-T J.1005 Recommendation ITU-T J.1005 (2015), Architecture and requirements of digital rights management (DRM) for cable television multiscreen. ITU-R BT.2020-2 Recommendation ITU-R BT.2020-2 (2015), Parameter values for ultra-high definition television systems for producti
28、on and international programme exchange. ETSI TS 103 285 ETSI TS 103 285 V1.1.1 (2015), Digital Video Broadcasting (DVB); MPEG-DASH Profile for Transport of ISO BMFF Based DVB Services over IP Based Networks. ISO/IEC 23001-7 ISO/IEC 23001-7: 2012, Information technology MPEG systems technologies Par
29、t 7: Common encryption in ISO base media file format files. ISO/IEC 23001-7 Amd.1 ISO/IEC 23001-7: 2012, Information technology - MPEG systems technologies - Part 7: Common encryption in ISO base media file format files, Amendment 1: AES-CBC-128 and key rotation. 2 Rec. ITU-T J.1006 (10/2016) ISO/IE
30、C 23009-1 ISO/IEC 23009-1:2012, Information technology Dynamic adaptive streaming over HTTP (DASH) Part 1: Media presentation description and segment formats. 3 Definitions 3.1 Terms defined elsewhere This Recommendation uses the following terms defined elsewhere: 3.1.1 multi-DRM ITU-T J.1005: A sys
31、tem which can select suitable DRM from two or more DRMs based on the special feature of service, the load of a system, a network situation, etc. 3.1.2 IP-VoD ITU-T J.1005: A service to deliver video content following a request from a user. IP-VoD supplies each video content on-demand basis. 3.1.3 ul
32、tra high definition television (UHD-TV) ITU-R BT.2020-2: 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 appropriate screen sizes relevant to usage at home and in public places. Signal
33、 formats contributing to increasing the compression efficiency are desirable for UHDTV systems since they have a larger number of pixels than HDTV systems. 3.2 Terms defined in this Recommendation None. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: A
34、ES Advanced Encryption Standard AVC Advanced Video Coding CBC Cipher Block Chaining CDN Content Delivery Network CENC Common Encryption in ISO Base Media File Format CP Content Protection CTR Counter DASH Dynamic Adaptive Streaming over HTTP DRM Digital Rights Management ECL Entitlement Control Lice
35、nse EML Entitlement Management License HD High Definition HEVC High Efficiency Video Coding HTTP Hypertext Transfer Protocol KID Key Identification MPD Media Presentation Description MPEG Moving Picture Experts Group NAL Network Abstraction Layer Rec. ITU-T J.1006 (10/2016) 3 PF Platform SD Standard
36、 Definition SP Service Provider TS Transport Stream UHD Ultra High Definition VoD Video on Demand W3C World Wide Web Consortium 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 Recommendat
37、ion is to be claimed. The keywords is recommended indicate a requirement which is recommended but which is 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
38、 deviation is permitted if conformance to this Recommendation is to be claimed. The keywords can optionally 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 opti
39、on and the feature can be optionally enabled by the network operator/service provider (SP). Rather, it means the 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 som
40、etimes appear, in which case they are to be interpreted, respectively, as is required to, is prohibited from, is 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 int
41、ent. 6 Multi-DRM specifications for IP-VoD multiscreen service 6.1 General In this Recommendation, the architecture and requirements of DRM is required to refer to ITU-T J.1005. Appendix I shows an overview of IP-VoD multi-DRM with an example that user terminals use different DRM. For content protec
42、tion the common encryption scheme ISO/IEC 23001-7 is required to be referred to. Appendix II describes the view of ISO/IEC 23001-7 and related encryption key management manner. Content protection specified in clause 8 of ETSI TS 103 285 on the usage of specific parameters that are defined within med
43、ia presentation description (MPD) of ISO/IEC 23009-1 and within ISO/IEC 23001-7 is required to be referred to together with the differences shown in the remaining clauses of clause 6 of this Recommendation. Appendix IV describes the protocol stack model for IP-VoD. 6.2 Encryption mode Media data is
44、required to be encrypted using advanced encryption standard (AES) 128-bit in counter (CTR) mode. AES 128-bit in cipher block chaining (CBC) mode is optionally used. 4 Rec. ITU-T J.1006 (10/2016) Encrypted network abstraction layer (NAL) structured video tracks such as ITU-T H.264 and ITU-T H.265 is
45、required to use subsample protection. All other types of encrypted tracks are required to use full sample encryption. For the details of CTR mode operation ISO/IEC 23001-7 is required to be referred to. For CBC mode operation ISO/IEC 23001-7 and ISO/IEC 23001-7 Amd.1 are required to be referred to.
46、6.3 Encryption of different representations Encryption specification for different representations shall refer to clause 8.3 of ETSI TS 103 285. Ultra high definition (UHD) content is recommended to be treated in addition to high definition (HD) and standard definition (SD) content. In case where UH
47、D content is contained with HD and/or SD content in one presentation and MPD of ISO/IEC 23009-1, but different license rights are given for each resolution, then they are required to be contained in different Adaptation Sets, each with different ContentProtection descriptors in the Adaptation Set. 6
48、.4 Key rotation Key rotation is optionally supported to allow entitlement changes during streaming contents. In that case media segments may be used to deliver new media keys changed within a track. Initialization segments of ISO/IEC 23009-1 may contain one or more Protection System Specific Header
49、pssh boxes in the Movie moov box which are specified by ISO/IEC 23001-7. Media Segments may also include pssh boxes in Movie Fragment moof boxes. pssh boxes carried in the Media Segments deliver information about new keys, licenses or sub-licenses and ensure that random access to each segment remains possible and that the DRM Player receives updated information in advance for continuous playback. DRM may require information from pssh boxes from both
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