1、ETSI TS 101 860 1.1.1 (2001-12) Technical Specificafion Digital Audio Broadcasting (DAB); Distribution Interfaces; Service Transport Interface (STI); STI levels 2 ETSI TS 101 860 V1.l.l (2001-12) Reference DTS/JTC-DAB-26 Keywords DAB, digital, audio, broadcasting, service, transport, intetface, data
2、, network ETSI 650 Route des Lucioles F-O6921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 O0 Fax: +33 4 93 65 47 16 Siret No 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-prfecture de Grasse (06) No 7803/88 Important notice Individual copies of the present do
3、cument can be downloaded from: http:l/w.etsi .orq The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dis
4、pute, the reference shall 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
5、ETSI documents is available at 3 If you find errors in the present document, send your comment to: Cori vriaht Notifica tion No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. O European Telecommunica
6、tions Standards Institute 2001. O European Broadcasting Union 2001. All rights reserved. ETSI 3 ETSI TS 101 860 V1.l.l (2001-12) Contents Intellectual Property Rights 5 Foreword . 5 Introduction 5 1 Scope 6 2 References 6 3 Definitions and abbreviations . 7 3.1 Definitions . 7 3.2 Abbreviations . .
7、7 4 STI Levels 8 4.1 STI-D(L1) Stream Types . 8 4.1.1 Basic Stream Types . 8 4.1.1.1 MSC sub-channel streams 8 4.1.1.2 FIC FIG stream . 8 4.1.2 Optional Stream Types . 9 9 4.2 4.2.1 STI-D(L1) requirements 9 4.2.2 STI-C(L1) requirements 9 4.3.1 STI-D(L1) requirements 9 4.3.2 STI-C(L1) requirements 10
8、 4.4.1 STI-D(L1) requirements 10 4.4.2 STI-C(L1) requirements 10 Annex A (informative): Implications of STI level definitions on device functionality . 12 A . 1 Introduction 12 A.2 Minimum STI device functionality 13 A.2.1 Ensemble Provider (EP) . 13 A.2.1.1 STI Level 1 . 13 A.2.1.2 STI Level 2 . 13
9、 A.2.1.3 STI Level 3 . 14 A.2.2 Service Provider (SP) . 15 A.2.2.1 Service Provider (upstream entity) . 15 A.2.2.1.1 STI Level 1 15 A.2.2.1.2 STI Level 2 15 A.2.2.1.3 STI Level 3 15 A.2.2.2 Service Provider (downstream an 16 A.2.2.2.1 STI Level 1 (downstream ent 16 A.2.2.2.2 STI Level 2 (downstream
10、entity) 16 A.2.2.2.3 STI Level 3 (downstream entity) 16 Annex B (informative): Examples of DAB collection networks . 18 B . 1 Introduction 18 B.2 Examples 18 B.2.1 Example 1 . 18 B.2.2 Example 2 . 19 B.2.3 Example 3 . 19 B.2.4 Example 4 . 20 B.2.5 Example 5 . 21 STI Level 1 . STI Level 2 . 9 4.3 STI
11、 Level 3 . 10 4.4 4.5 Connecting entities of different STI Le ETSI 4 ETSI TS 101 860 V1.l.l (2001-12) Annex C (normative): Using TCP/IP as Transport Mechanism for STI-C(L1) messages . 22 C . 1 Introduction 22 C.2 Motivation and Background . 22 C.3 Specification . 23 Annex D (informative): Bibliograp
12、hy . 24 History 25 ETSI 5 ETSI TS 101 860 V1.l.l (2001-12) 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,
13、and can be found in ETSI SR O00 314: “Intellectual Property Rights (7PRs); Essential, orpotentially Essential, IPRs notlJied to ETSI in respect ofETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (5). Pursuant to the ETSI IPR Policy, n
14、o 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 O00 3 14 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technica
15、l Specification (TS) has been produced by by the 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: The EBU/ETSI JTC Broadcast was establis
16、hed 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 and television rece
17、ivers. 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 broadcasting area; its
18、 headquarters is in Geneva. European Broadcasting Union CH-I218 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 audio and data to fix
19、ed, portable or mobile receivers. Their work resulted in the publication of European Standard, EN 300 401 i, for DAB (see note) which now has worldwide acceptance. The members of the Eureka Project 147 are drawn from broadcasting organizations and telecommunication providers together with companies
20、from the professional and consumer electronics industry. NOTE: DAB is a registered trademark owned by one of the Eureka Project 147 partners. I n t rod uct ion The present document is one of a set associated with DAB. EN 300 401 i describes the transmitted signal, the interface between the broadcast
21、ers transmitters and the listeners receiver. The associated documents, EN 300 797 2, EN 300 798 3 and ETS 300 799 4 describe additional interfaces, which can be used by broadcasters or network providers to build DAB collection and distribution networks. In particular the document EN 300 797 2 establ
22、ishes a standard way for transporting Service Components, Service Information and control messages between two entities in a DAB collection network. Because of the openness and flexibility of the Service Transport Interface (STI) standard there is uncertainty regarding the implementation of it. This
23、 applies to interoperability between devices from different suppliers. Practical broadcast scenarios do not always require to implement the full standard, which creates the problem that different suppliers might implement different subsets of EN 300 797 2. To overcome this problem and to fully explo
24、it the great potential of the DAB system, the subject of the present document is to describe implementation levels of the STI standard and to outline their usage. ETSI 6 ETSI TS 101 860 V1.l.l (2001-12) 1 Scope The present document establishes guidance in implementation and usage of the functionalit
25、y described in the STI standard EN 300 797 2. Subsets of the STI standard are defined in order to make interoperable solutions possible for different suppliers of STI devices. The subsets are called STI Levels. Interoperability is ensured if the STI Logical Interface (LI) and STI Physical Interfaces
26、 (STI-PI, X) are the same for entities transporting DAB Service Components, Service Information and control messages in a DAB collection network. The present document only particularizes the Logical Interface (LI) layer of the STI, i.e. the syntax for STI-D frames and STI-C messages, to provide inte
27、roperability . The present document defines a functional hierarchy of levels. Higher levels comprise lower levels. Three levels are specified where the highest STI Level does not comprise all STI functionality that could be implemented using EN 300 797 2. Some of the functionality is not included du
28、e to the fact that it is not assumed to be widely used. This functionality may optionally be added to any of the defined STI Levels. The present document defines the minimum functionality an upstream or downstream entity shall provide on each level to be considered compliant with that level. 2 Re fe
29、 re nces The following documents contain provisions which, through reference in this text, constitute provisions of the present document. References are either specific (identified by date of publication andor edition number or version number) or non-specific. For a specific reference, subsequent re
30、visions do not apply. For a non-specific reference, the latest version applies. il ETSI EN 300 401 (V1.3.2): “Radio broadcasting systems; Digital Audio Broadcasting (DAB) to mobile, portable and fixed receivers“. ETSI EN 300 797 (Vi. 1.1): “Digital Audio Broadcasting (DAB); Distribution interfaces;
31、Service Transport Interface (STI)“. ETSI EN 300 798 (Vl.l.1): “Digital Audio Broadcasting (DAB); Distribution interfaces; Digital baseband In-phase and Quadrature (DIQ) interface“. ETSI ETS 300 799 (1 997): “Digital Audio Broadcasting (DAB); Distribution interfaces; Ensemble Transport Interface (ETI
32、)“. ETSI TR 101 496 (all parts): “Digital Audio Broadcasting (DAB); Guidelines and rules for implementation and operation“. ITU-T Recommendation G.704: “Synchronous frame structures used at 1544,63 12,2048, 8448 and 44 736 kbit/s hierarchical levels“. 21 31 41 51 61 71 ITU-T Recommendation G.703: “P
33、hysical/electrical characteristics of hierarchical digital interfaces“. ETSI 7 ETSI TS 101 860 V1.l.l (2001-12) 3 3.1 Definitions and abbreviations De fi nit ions For the purposes of the present document, the terms and definitions given in EN 300 401 i, EN 300 797 2 and the following apply: STI Leve
34、l: Subset of functionality according to EN 300 797. 3.2 Abbreviations For the purposes of the present document, the abbreviations given in EN 300 401 i, EN 300 797 2 and the following abbreviations apply: API DNS EP IANA IP ISDN SP TCP VPN Application Programming Interface Dynamic Name Server Ensemb
35、le Provider Internet Assigned Numbers Association Internet Protocol Integrated Services Digital Network Service Provider Transport Control Protocol Virtual Private Network ETSI 8 ETSI TS 101 860 V1.l.l (2001-12) 4 STI Levels The STI Levels describe the STI functionality, i.e. STI-D stream types and
36、STI-C message sets and their usage, that STI entities shall provide to be considered STI level compliant. The levels shall be subsets of EN 300 797 2 with respect to STI-D(L1) and STI-C(L1) functionality. A total of three levels is defined. The level requiring the least functionality is called level
37、 1. Higher levels shall fully comprise the lower ones. The levelling proposed in the present document is only valid for the logical part of EN 300 797 2 and does not apply to physical interfaces. Thus an STI capable device may be equipped with one or more physical interfaces, each being capable of p
38、roviding one of the STI Levels as defined in the present document. 4.1 STI-D(LI) Stream Types The STI-D(L1) data stream types classified in EN 300 797 2, clause 4.2, are divided into two parts, basic stream types and optional stream types. 4.1 .I Basic Stream Types Basic stream types are: - - - - -
39、MSC sub-channel audio stream service component; MSC sub-channel data stream service component; MSC sub-channel data stream made of one or more packet mode service components (and padding); FIC FIG stream Service Information; FIC FIG stream Fast Information Data Channel service component. Table 1 sho
40、ws which TID and TIDext shall be supported. Table 1: TIDiTlDext supported as basic stream types TID I TIDext I Sign if icance o Io IMSC audio stream I II IMSC data stream I 12 IMSC packet mode stream 4 10 IService information 4.1 .I .I MSC sub-channel streams The basic stream types shall provide cor
41、rect handling of individual MSC streams as described in EN 300 797 2, clause 5.9.1. 4.1 .I .2 FIC FIG stream The basic stream types shall provide correct handling of FIC FIG streams carried in STI-D(L1) as described in EN 300 797 2, clause 5.9.3. ETSI 9 ETSI TS 101 860 V1.l.l (2001-12) 4.1.2 Optiona
42、l Stream Types Other stream types than those defined as basic are optional on all STI Levels: - - MSC sub-channel contribution packet mode data service component; FIC FIG stream CA information; - - FIC FIB stream asynchronous FIB insertion; FIC FIB stream synchronous FIB insertion. 4.2 STI Level 1 T
43、his clause defines the minimum functionality required by an STI upstream or downstream entity to be considered conformant to STI Level 1. Only STI-D(L1) basic stream types are supported. Control message exchange between upstream and downstream entities is not included. Therefore no support of STI-C(
44、L1) messages is required. Usage of this level shall assume a configuration agreement between the upstream and downstream entities. 4.2.1 STI-D(LI) requirements All basic stream types as defined in clause 4.1.1 shall be supported in downstream entities. At least one basic stream type shall be support
45、ed in upstream entities. The handling of FIGS carrying DAB logical frame count information (see EN 300 401 i) needs not be supported in FIC FIG streams. 4.2.2 STI -C( LI) requirements In STI Level 1 no setup and control messages can be exchanged between an upstream and downstream entity. Therefore n
46、o support of STI-C(L1) shall be required. 4.3 STI Level 2 This clause defines the minimum functionality required by an STI upstream or downstream entity to be considered conformant to STI Level 2. The minimum functionality required in level 1 shall be comprised on this level. On STI Level 2 the poss
47、ibility to exchange certain STI-C(L1) messages between upstream and downstream entities shall be supported. Extending the functionality provided on STI Level 1, STI Level 2 supports seemless and coordinated dynamic reconfiguration as well as the usage of FIG files. 4.3.1 STI-D(LI) requirements The S
48、TI-D(L1) requirements of STI Level 1 shall be comprised, i.e. all basic stream types as defined in clause 4.1.1 shall be supported in downstream entities. At least one basic stream type shall be supported in upstream entities. The handling of FIGS carrying DAB logical frame count information (see EN
49、 300 401 i) needs not be supported in FIC FIG streams. ETSI 10 ETSI TS 101 860 V1.l.l (2001-12) 4.3.2 STI-C(LI) requirements In STI Level 2 exchange of control messages shall be supported. The required functionality comprises seamless dynamic reconfiguration of the DAB multiplex initiated by the upstream entity, the possibility to define new configurations, exchange of error messages and frame counter information. FIG files in addition to FIG streams may be used to provide FIC content. Therefore the following message classes
