1、 ETSI TS 102 367 V1.2.1 (2006-01)Technical Specification Digital Audio Broadcasting (DAB);Conditional accessEuropean Broadcasting Union Union Europenne de Radio-Tlvision EBUUER ETSI ETSI TS 102 367 V1.2.1 (2006-01) 2 Reference RTS/JTC-DAB-46 Keywords audio, broadcasting, DAB, data, digitalETSI 650 R
2、oute des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice Individual copies of the present document can be download
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4、all be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on the current status of this and other ETSI documents is avai
5、lable at http:/portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http:/portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permission. The
6、copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2006. European Broadcasting Union 2006. All rights reserved. DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registered for the benefit of its Members. TIPHONTMand the
7、TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. ETSI ETSI TS 102 367 V1.2.1 (2006-01) 3 Contents Intellectual Property Rights5 Foreword.5 1
8、 Scope 6 2 References 6 3 Definitions, abbreviations and conventions .6 3.1 Definitions6 3.2 Abbreviations .6 3.3 Conventions7 4 General description.8 4.1 DAB transport protocols and DAB transport channels 8 4.2 Scrambling Modes8 4.2.1 Scrambling DAB sub-channels.8 4.2.2 Scrambling DAB Data Groups .
9、9 4.2.3 Scrambling MOT Objects.9 4.3 Concept of a Conditional Access System.10 4.4 Concept of a Shared Scrambler System (SSS) .11 5 Parameters: format, coding and location12 5.1 CA Identifier (CAId)12 5.2 CA System Identifier List (CASysIdList) 12 5.2.1 CA System Identifier (CASysId)14 5.2.2 Short C
10、A System Identifier (ShortCASysId)14 5.2.3 CA System Internal Characteristics (CAIntChar).14 5.3 CA Indication - CAFlag/CAIndi 14 5.4 CA Organization (CAOrg) .15 5.4.1 Conditional Access Mode (CAMode).15 5.4.2 Shared Scrambler Flag Field (SharedFlag).15 5.5 CA Organization Indication - CAOrgFlag / C
11、AOrgIndi 16 5.6 CA Synchronization Parameters (CASyncParam) .16 5.7 CA System Internal Messages (CAIntMess)17 5.8 Overview of the parameter location .17 6 Sub-channel CA .18 6.1 Location of the CA System 19 6.2 Signalling of CA.19 6.3 Transport of content and of CAIntMess .20 6.4 Coding of the SUBCA
12、Prefix20 7 Data Group CA.20 7.1 Location of the CA system.21 7.2 Signalling of CA.21 7.2.1 Signalling of data groups transported in a packet mode sub-channel .21 7.2.2 Signalling of data groups transported in PAD 22 7.3 Transport of content and of CAIntMess .23 7.3.1 Transport of the Content .23 7.3
13、.2 Transport of the CAIntMess .23 7.4 Coding of the CAIntMessField 24 7.5 Coding of the DGCAPrefix24 8 MOT CA 24 8.1 Location of the CA system.25 8.2 Signalling of CA.25 8.3 Transport of content and of CAIntMess .26 8.3.1 Transport of the content27 8.3.2 Transport of the CAIntMess .27 ETSI ETSI TS 1
14、02 367 V1.2.1 (2006-01) 4 8.4 Coding of the CAIntMessField 27 8.5 Coding of the MOTCAPrefix.28 Annex A (informative): Example for Shared Scrambler Concept.29 Annex B (informative): Examples for Parameter Settings in the DAB Multiplex .30 Annex C (normative): Behaviour of non-CA capable Terminals 32
15、Annex D (normative): Behaviour of CA capable Terminals33 Annex E (informative): Synchronization Parameters.34 Annex F (normative): Conditional Access System Identifier (CASysID).35 Annex G (informative): Recommended coding of the SUBCAPrefix 36 G.1 PrefixHeader.36 G.2 PrefixDataField 37 G.3 CRC37 Hi
16、story 38 ETSI ETSI TS 102 367 V1.2.1 (2006-01) 5 Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be
17、 found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/webapp.etsi.org/IPR/home.asp). Pursuant
18、to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document
19、. Foreword This Technical Specification (TS) has been produced by Joint Technical Committee (JTC) Broadcast of the European Broadcasting Union (EBU), Comit Europen de Normalisation ELECtrotechnique (CENELEC) and the European Telecommunications Standards Institute (ETSI). NOTE 1: The EBU/ETSI JTC Bro
20、adcast was established in 1990 to co-ordinate the drafting of standards in the specific field of broadcasting and related fields. Since 1995 the JTC Broadcast became a tripartite body by including in the Memorandum of Understanding also CENELEC, which is responsible for the standardization of radio
21、and television receivers. The EBU is a professional association of broadcasting organizations whose work includes the co-ordination of its members activities in the technical, legal, programme-making and programme-exchange domains. The EBU has active members in about 60 countries in the European bro
22、adcasting area; its headquarters is in Geneva. European Broadcasting Union CH-1218 GRAND SACONNEX (Geneva) Switzerland Tel: +41 22 717 21 11 Fax: +41 22 717 24 81 The Eureka Project 147 was established in 1987, with funding from the European Commission, to develop a system for the broadcasting of au
23、dio and data to fixed, portable or mobile receivers. Their work resulted in the publication of European Standard, EN 300 401 1, for DAB (see note 2) which now has worldwide acceptance. The members of the Eureka Project 147 were drawn from broadcasting organizations and telecommunication providers to
24、gether with companies from the professional and consumer electronics industry. In 1995, the European DAB Forum (EuroDAB) was established to pursue the introduction of DAB services in a concerted manner world-wide, and it became the World DAB Forum (World DAB) in 1997. NOTE 2: DAB is a registered tra
25、demark owned by one of the Eureka Project 147 partners. ETSI ETSI TS 102 367 V1.2.1 (2006-01) 6 1 Scope Conditional Access systems provide DAB with the ability to deliver encrypted services, both audio and data. The present document specifies a standardized framework that defines how to signal and t
26、ransport encrypted services within the Digital Audio Broadcasting (DAB) system. The framework is open to the integration of several different Conditional Access systems as well as to the integration of Shared Scrambler Systems. 2 References The following documents contain provisions which, through r
27、eference in this text, constitute provisions of the present document. References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest vers
28、ion applies. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. 1 ETSI EN 300 401: “Radio Broadcasting Systems; Digital Audio Broadcasting (DAB) to mobile, portable and fixed receivers“. 2 ETSI EN 301 234: “Di
29、gital Audio Broadcasting (DAB); Multimedia Object Transfer (MOT) protocol“. 3 Definitions, abbreviations and conventions 3.1 Definitions For the purposes of the present document, the terms and definitions given in EN 300 401 1 and the following apply: Conditional Access (CA): mechanism by which the
30、user access to service components can be restricted Control Word (CW): Key or part of the key that is used to encrypt and decrypt the content PrefixDataField: body of Sub-channel Conditional Access Prefix PrefixHeader: Header of Sub-channel Conditional Access Prefix Shared Scrambler System (SSS): pr
31、ovides synchronization of the different CA Systems where one service is provided by more than one CA provider with common content scrambling NOTE: Apart from the CA System decoder module, receivers contain a Common Descrambler. 3.2 Abbreviations For the purposes of the present document, the abbrevia
32、tions defined in EN 300 401 1, EN 301 234 2 and the following apply: BWS Broadcast WebSite CA Conditional Access CACC Conditional Access Communication Controller CAFlag Conditional Access Flag CAId Conditional Access Identifier ETSI ETSI TS 102 367 V1.2.1 (2006-01) 7 CAIndi Conditional Access Indica
33、tor field CAIntChar Conditional Access system Internal Characteristics CAIntMess Conditional Access system Internal Messages CAIntMessField Conditional Access system Internal Messages Field CAMode Conditional Access Mode CAOrg Conditional Access Organization CAOrgFlag Conditional Access Organization
34、 Flag CAOrgIndi Conditional Access Organization Indicator field CASyncParam Conditional Access Synchronization Parameters CASysId Conditional Access System Identifier CASysIdList List of Conditional Access System Identifiers Ch Channel CW Control Word CWT Control Word Toggle bit DGCAPrefix Data Grou
35、p Conditional Access Prefix EEP Equal Error Protection FIDC Fast Information Data Channel GSM Global System for Mobile communication IP Tunnel. Internet Protocol Tunnelling LSb Least Significant bit MOT DirMod MOT Directory Mode MOT HdMode MOT Header Mode MOTCAPrefix MOT Conditional Access Prefix MP
36、EG2-TS MPEG2 Transportation Stream MSb Most Significant bit MSC Main Service Channel PAD Programme Associated Data SharedFlag Shared scrambler Flag field ShortCASysId Short Conditional Access System Identifier SLS SLide Show SSS Shared Scrambler System SUBCAPrefix SUB-channel Conditional Access Pref
37、ix TDC Transparent Data Channel 3.3 Conventions Unless otherwise stated, the following notation, regarding the order of bits within each step of processing is used: - in figures, the bit shown in the left hand position is considered to be first; - in tables, the bit shown in the left hand position i
38、s considered to be first; - in byte fields, the Most Significant bit (MSb) is considered to be first and denoted by the higher number. For example, the MSb of a single byte is denoted “b7“ and the Least Significant bit (LSb) is denoted “b0“; - in vectors (mathematical expressions), the element with
39、the lowest index is considered to be first. NOTE: Due to time-interleaving, this order of bits is not the true transmission order. A black triangle within figures indicates that the corresponding element is scrambled. ETSI ETSI TS 102 367 V1.2.1 (2006-01) 8 4 General description 4.1 DAB transport pr
40、otocols and DAB transport channels This clause gives an overview of the existing DAB transport protocols and DAB transport channels. MSC Audio Ch Packet Ch Stream Ch FIC PAD Audio Data Group DAB Transport Protocols DAB Transport Channels IP Tunnel. FIDC MOT HdMod MOT DirMod TDC MPEG2-TS Figure 1: Ov
41、erview of DAB transport protocols and DAB transport channels 4.2 Scrambling Modes Conditional Access Systems might be applied on different levels. This clause describes the three DAB transport levels that are available for Conditional Access and illustrates the impact on the upper transport levels,
42、marked with black triangles in figures 2, 3 and 4. 4.2.1 Scrambling DAB sub-channels Sub-channel CA: Encrypts a complete sub-channel, for example an audio sub-channel including PAD or an entire packet mode sub-channel or a stream mode sub-channel. ETSI ETSI TS 102 367 V1.2.1 (2006-01) 9 MSC Audio Ch
43、 Packet Ch Stream Ch FIC PAD Audio Data Group DAB Transport Protocols DAB Transport Channels IP Tunnel. FIDC MOT HdMod MOT DirMod TDC MPEG2-TS Figure 2: Application and impact of Sub-channel CA 4.2.2 Scrambling DAB Data Groups Data Group CA: Permits the encryption of all DAB data transfer protocols
44、that use MSC Data Groups, like IP Tunnelling, MOT, TDC, etc. MSC Audio Ch Packet Ch Stream Ch FIC PAD Audio Data Group DAB Transport Protocols DAB Transport Channels IP Tunnel. FIDC MOT HdMod MOT DirMod TDC MPEG2-TS Figure 3: Application and impact of Data Group CA 4.2.3 Scrambling MOT Objects MOT C
45、A: Permits the encryption of files carried using MOT directory mode, for instance selected parts of a Broadcast WebSite (BWS). ETSI ETSI TS 102 367 V1.2.1 (2006-01) 10 MSC Audio Ch Packet Ch Stream Ch FIC PAD Audio Data Group DAB Transport Protocols DAB Transport Channels IP Tunnel. FIDC MOT HdMod M
46、OT DirMod TDC MPEG2-TS Figure 4: Application and impact of MOT CA 4.3 Concept of a Conditional Access System The components of a Conditional Access System can be separated into “transmitter side CA system components“ and “receiver side CA system components“. Transmitter side CA system components: CA
47、 Message Encoder, Control Word Generator, Synchronizer and Scrambler. These components are provided with subscriber data, CA provider data and unscrambled content as input. - CA Message Encoder: The CA Message Encoder generates messages that might for instance be management messages that concern the
48、 entitlements of a user, or messages that contain the current control word and activate an entitlement check on the receiver side. These messages and message formats are CA system specific; they differ from CA system to CA system. In the following they are called CA System Internal Messages (CAIntMe
49、ss) and will not be detailed. The CA System Internal Messages can be carried in the multiplex. NOTE: In hybrid systems CA system Internal Messages may also be carried in other channels (e.g. GSM). - Control Word Generator: The Control Word Generator provides the control words that are needed by the Scrambler as well as by the CA Message Encoder and passes them to the Synchronizer. - Synchronizer: The Synchronizer synchronizes the process of scrambling and control word dispatching and passes therefore the
