1、 ETSI TS 103 551 V1.1.1 (2017-08) Digital Audio Broadcasting (DAB); Transport of TPEG services TECHNICAL SPECIFICATION ETSI ETSI TS 103 551 V1.1.1 (2017-08)2 Reference DTS/JTC-DAB-90 Keywords DAB, digital, radio, transport ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33
2、 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 The present document can be downloaded from: http:/www.etsi.org/standards-search The present document may be made available
3、in electronic versions and/or in print. The content of any electronic and/or print versions of the present document shall not be modified without the prior written authorization of ETSI. In case of any existing or perceived difference in contents between such versions and/or in print, the only preva
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5、 documents is available at https:/portal.etsi.org/TB/ETSIDeliverableStatus.aspx If you find errors in the present document, please send your comment to one of the following services: https:/portal.etsi.org/People/CommiteeSupportStaff.aspx Copyright Notification No part may be reproduced or utilized
6、in any form or by any means, electronic or mechanical, including photocopying and microfilm except as authorized by written permission of ETSI. The content of the PDF version shall not be modified without the written authorization of ETSI. The copyright and the foregoing restriction extend to reprod
7、uction in all media. ETSI 2017. European Broadcasting Union 2017. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are trademarks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are trademarks of ETSI registered for the benefit of its Members and of the 3GPP Organi
8、zational Partners. oneM2M logo is protected for the benefit of its Members. GSM and the GSM logo are trademarks registered and owned by the GSM Association. ETSI ETSI TS 103 551 V1.1.1 (2017-08)3 Contents Intellectual Property Rights 4g3Foreword . 4g3Modal verbs terminology 4g31 Scope 5g32 Reference
9、s 5g32.1 Normative references . 5g32.2 Informative references 5g33 Definitions and abbreviations . 5g33.1 Definitions 5g33.2 Abbreviations . 6g34 Introduction 6g35 Transport of TPEG services . 6g35.1 Transport method . 6g35.2 Decoder issues 7g3History 8g3ETSI ETSI TS 103 551 V1.1.1 (2017-08)4 Intell
10、ectual Property Rights Essential patents 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 found in ETSI SR 000 314: “Intellect
11、ual 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 (https:/ipr.etsi.org/). Pursuant to the ETSI IPR Policy, no investigation, including
12、 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. Trademarks The present document may include trade
13、marks and/or tradenames which are asserted and/or registered by their owners. ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present docume
14、nt does not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks. Foreword This Technical Specification (TS) has been produced by Joint Technical Committee (JTC) Broadcast of the European Broadcasting Union (EBU), Comit Europen de Normalisation EL
15、ECtrotechnique (CENELEC) and the European Telecommunications Standards Institute (ETSI). NOTE 1: The EBU/ETSI JTC Broadcast 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
16、 by including in the Memorandum of Understanding also CENELEC, which is responsible for the standardization of radio 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,
17、programme-making and programme-exchange domains. The EBU has active members in about 60 countries in the European broadcasting 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 1
18、47 was established in 1987, with funding from the European Commission, to develop a system for the broadcasting of audio and data to fixed, portable or mobile receivers. Their work resulted in the publication of European Standard, ETSI EN 300 401 1, for DAB (see note 2) which now has worldwide accep
19、tance. NOTE 2: DAB is a registered trademark owned by one of the Eureka Project 147 partners. The DAB family of standards is supported by WorldDAB, an organization with members drawn from broadcasting organizations and telecommunication providers together with companies from the professional and con
20、sumer electronics industry. Modal verbs terminology In the present document “shall“, “shall not“, “should“, “should not“, “may“, “need not“, “will“, “will not“, “can“ and “cannot“ are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisio
21、ns). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TS 103 551 V1.1.1 (2017-08)5 1 Scope The present document describes the standardized method to carry TPEG services over Digital Audio Broadcast (DAB). 2 References 2.1 Normative references
22、References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendments) applies. Referenc
23、ed documents which are not found to be publicly available in the expected location might be found at https:/docbox.etsi.org/Reference/. NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee their long term validity. The following referenced d
24、ocuments are necessary for the application of the present document. 1 ETSI EN 300 401 (V2.1.1): “Radio Broadcasting Systems; Digital Audio Broadcasting (DAB) to mobile, portable and fixed receivers“. 2 ETSI TS 101 756: “Digital Audio Broadcasting (DAB); Registered Tables“. 3 ETSI TS 101 759: “Digita
25、l Audio Broadcasting (DAB); Data Broadcasting - Transparent Data Channel (TDC)“. 4 ISO/TS 21219-5: “Intelligent transport systems - Traffic and travel information (TTI) via transport protocol experts group, generation 2 (TPEG2) - Part 5: Service framework (TPEG2-SFW)“. 2.2 Informative references Ref
26、erences are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendments) applies. NOTE: While
27、 any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee their long term validity. The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. Not appli
28、cable. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: MSC data group: package of data used for one user application in the Main Service Channel TPEG transport frame: data-structure implementing the TPEG service in
29、the TPEG binary representation ETSI ETSI TS 103 551 V1.1.1 (2017-08)6 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: CRC Cyclic Redundancy Check DAB Digital Audio Broadcasting DSCTy Data Service Component Type EBU European Broadcasting Union FEC Forwar
30、d Error Correction FIG Fast Information Group MSC Main Service Channel TDC Transparent Data Channel TPEG Transport Protocol Expert Group TPEG2-SFW Transport Protocol Expert Group 2 Service FrameWork TTI Traffic and Travel Information UATy User Application Type 4 Introduction TPEG permits a wide rang
31、e of data to be formatted and packaged to make it transportable and decodable by suitably equipped receivers. TPEG is designed to be bearer independent and so may be delivered as a simple stream of bytes. The present document describes the standard method to transport a TPEG byte stream over DAB. 5
32、Transport of TPEG services 5.1 Transport method TPEG transport frames (see ISO/TS 21219-5 4) shall be carried in MSC data groups. The MSC data groups shall be transported using the TDC in a packet mode service component with data groups, as specified in ETSI TS 101 759 3, clause 4.1.2. An MSC data g
33、roup shall carry one or more complete TPEG transport frames. Every MSC data group shall begin with the start of a TPEG transport frame. MSC data group segmentation shall not be used. A TPEG transport frame shall not exceed the size of the data group data field. Padding bytes with the value 0 may be
34、appended following the TPEG transport frames if a fixed size MSC data group is desired, although this will reduce the efficiency of transmission. Repetition of data groups shall not be used because the TPEG transport frames are repeated by the TPEG service provider. MSC data groups shall be used wit
35、h the header attributes specified in table 1. Table 1: List of data group header attributes Header field Value Notes Extension Flag 0 No extension field CRC Flag 1 CRC used Segment Flag 0 No segment field User Access Flag 0 No user access field Data Group Type 0000 General data Continuity Index Incr
36、ements for each data group Repetition Index 0 Repetition is not used The MSC data groups shall be divided into packets and inserted into a packet mode sub-channel, which may also carry other packet mode service components. Padding shall be inserted as necessary if the final packet is not completely
37、filled with useful data from the MSC data group. ETSI ETSI TS 103 551 V1.1.1 (2017-08)7 Transmission systems shall always set the CRC flag = 1. Previous versions of the DAB standard (see 1) permitted the data group CRC to be optional; for a transitional period these transmissions may remain on-air a
38、nd so receivers shall check the value of the CRC flag. Forward Error Correction shall be applied to the packet mode sub-channel used to carry the TPEG service component. The TPEG service component shall not use DAB conditional access. In FIG 0/3, the DSCTy shall be set to TDC (see ETSI TS 101 756 2)
39、. In FIG 0/13, the UATy shall be set to TPEG (see ETSI TS 101 756 2). In FIG 0/14, the FEC Scheme shall be set to 01 (FEC scheme applied according to ETSI EN 300 401 1, clause 5.3.5). 5.2 Decoder issues TPEG receiver implementations shall support FEC for packet mode sub-channels. MSC data groups car
40、ry complete TPEG transport frames and may include padding bytes with value 0 at the end. Assembly of data groups should proceed as follows: Data groups should be assembled exclusively from error-free packet data, extracted from packets with successful packet CRC confirmation. The data group assembly
41、 should confirm the continuity index in the packet header to be incrementing correctly in successive packets. Once a data group has been assembled from a contiguous sequence of error free data packets, when present (the CRC flag indicates whether the transmission uses the data group CRC or not) the
42、data group CRC shall be evaluated to establish that the data group payload is error free. NOTE: While CRC checks are generally not free from false-positive results, it is highly unlikely that both packet and data group CRCs will have a false-positive at the same time. The chance that a data group as
43、sembled from packets with false-positive packet CRCs will give a correct data group CRC should be considered negligible. This best practice is to ensure that the data group payload is free from errors; TPEG decoders may additionally confirm validity of data using TPEG specific integrity mechanisms. ETSI ETSI TS 103 551 V1.1.1 (2017-08)8 History Document history V1.1.1 August 2017 Publication
