1、 ETSI TS 102 980 V2.1.1 (2017-01) Digital Audio Broadcasting (DAB); Dynamic Label Plus (DL Plus); Application specification TECHNICAL SPECIFICATION ETSI ETSI TS 102 980 V2.1.1 (2017-01)2 Reference RTS/JTC-DAB-84 Keywords broadcast, DAB, text ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex
2、 - 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 The present document can be downloaded from: http:/www.etsi.org/standards-search The present document may
3、 be made available 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 pr
4、int, the only prevailing document is the print of the Portable Document Format (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
5、this and other ETSI 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 repr
6、oduced or utilized 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 restricti
7、on extend to reproduction in all media. European Telecommunications Standards Institute 2017. European Broadcasting Union 2017. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are Trade Marks of ETSI
8、registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TS 102 980 V2.1.1 (2017-01)3 Contents Intellectual Property Rights 4g3Foreword . 4g3Modal verbs terminology 4g31 Scope 5g32 R
9、eferences 5g32.1 Normative references . 5g32.2 Informative references 5g33 Definitions and abbreviations . 5g33.1 Definitions 5g33.2 Abbreviations . 6g34 Introduction 6g35 DL Plus objects 8g35.0 Introduction 8g35.1 Content types 8g35.2 Linking of DL Plus objects. 9g35.2.0 Introduction. 9g35.2.1 Aggr
10、egating DL Plus objects (category Item) 9g35.2.2 Compiling DL Plus objects into tables . 10g35.2.3 Linking a Descriptor object to another DL Plus object . 11g35.3 Life time, updating and deletion . 12g35.3.0 Introduction. 12g35.3.1 Updating objects . 12g35.3.2 Deleting objects 12g36 DL Plus tags . 1
11、2g36.0 Introduction 12g36.1 Creating a dummy object . 13g36.2 Creating a delete object 13g37 Command structure 14g37.1 Transport of DL Plus commands 14g37.2 DL Plus commands: general structure 15g37.3 The DL Plus tags command . 15g37.4 Transmission sequence . 16g38 Receiver behaviour . 16g38.0 Intro
12、duction 16g38.1 Basic requirements . 16g38.2 History 17g3Annex A (normative): List of DL Plus content types 18g3Annex B (informative): Use cases and Examples 21g3B.1 Use cases 21g3B.2 Examples for navigation and display use . 25g3B.3 Prioritization . 25g3Annex C (informative): DL Plus and the compat
13、ibility with RDS/RT+ 27g3Annex D (informative): Bibliography . 28g3History 29g3ETSI ETSI TS 102 980 V2.1.1 (2017-01)4 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 an
14、y, is publicly available for ETSI members and non-members, and can be 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 o
15、n the ETSI Web server (https:/ipr.etsi.org/). Pursuant 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 m
16、ay be, or may become, essential to the present document. 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 S
17、tandards 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 by including in the Memorandum of Understanding also CENELEC,
18、 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, programme-making and programme-exchange domains. The EBU has a
19、ctive 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 147 was established in 1987, with funding from the European Com
20、mission, 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 acceptance. NOTE 2: DAB is a registered trademark owned by one of t
21、he Eureka Project 147 partners. The DAB family of standards is supported by World DAB, an organization with members drawn from broadcasting organizations and telecommunication providers together with companies from the professional and consumer electronics industry. Modal verbs terminology In the pr
22、esent 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 provisions). “must“ and “must not“ are NOT allowed in ETSI deliverabl
23、es except when used in direct citation. ETSI ETSI TS 102 980 V2.1.1 (2017-01)5 1 Scope The present document defines a backward compatible extension of the Dynamic Label feature used in Digital Audio Broadcasting (DAB) (ETSI EN 300 401 1). 2 References 2.1 Normative references References are either s
24、pecific (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. Referenced documents which are
25、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 documents are necessary f
26、or 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 IEC 62106: “Specification of the radio data system (RDS) for VHF/FM sound broadcasting in the frequency range from 87,5 to
27、 108,0 MHz“. 2.2 Informative references 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 (inc
28、luding any amendments) applies. 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 documents are not necessary for the application of the present document but they assist the user with reg
29、ard to a particular subject area. Not applicable. 3 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions given in ETSI EN 300 401 1 and the following apply: category: group of content types content type: classification of the content of a
30、DL Plus object Dynamic Label (DL): feature of DAB for providing a programme with text messages; it also provides commands, e.g. for presentation on the receiver terminal ETSI ETSI TS 102 980 V2.1.1 (2017-01)6 Dynamic Label (DL) message: text messages that are associated with a programme service and
31、are transmitted in the PAD part of that programme NOTE: One single DL message should be sufficient for complete comprehension by a (human) listener. Dynamic Label Plus (DL Plus): extension of the Dynamic label feature; it allows storing and filtering parts of the text (sent as DL messages) in the re
32、ceiver terminal as DL Plus objects, which then can be selected and accessed by the listener independently from the currently transmitted DL messages DL plus command: mechanism for carrying the DL tags necessary for identifying DL Plus objects DL plus object: text string created in a receiver with a
33、defined content type to allow selection by the listener DL plus tag: contains the location and the content type of a DL Plus object carried in a corresponding Dynamic Label Message programme item: time-slice of a programme, for example, a piece of music or a documentary report 3.2 Abbreviations For
34、the purposes of the present document, the following abbreviations apply: CD Compact Disc CRC Cyclic Redundancy Check DAB Digital Audio Broadcasting DL Plus Dynamic Label Plus DL Dynamic Label EPG Electronic Programme Guide FIG Fast Information Group FM Frequency Modulation IR Item Running IT Item To
35、ggle MMS Multimedia Message Service NT Number of Tags ODA Open Data Application PAD Programme Associated Data PC Personal Computer PDA Personal Digital Assistant PMP Personal Media Player RDS Radio Data System RT RadioText RT+ RadioText Plus SMS Short Message Service UECP Universal Encoder Communica
36、tion Protocol URL Universal Resource Location USB Universal Serial Bus 4 Introduction Digital Audio Broadcasting DAB 1 provides the text feature Dynamic Label (DL) which allows the service provider to send text messages with information such as track playing, now/next, news headlines, weather, sport
37、 results, etc. To serve all the different interests of listeners, the service provider has to send DL messages frequently and with different content, one after the other, each message replacing the one before. The more information he wants to provide, the more frequently he has to update the message
38、s, and the less time is left for presentation of a message on the display and for reading by a listener. So it will happen that a listener has to wait until specific information he is interested in shows up and - even worse - has to observe the display continuously in order not to miss the instant w
39、hen the desired information is displayed. DL Plus solves this dilemma by allowing the listener to select the kind of information he is interested in. For that purpose DL messages are complemented by tags which identify specific content of the DL message by its content type. ETSI ETSI TS 102 980 V2.1
40、.1 (2017-01)7 Users can select the content types of information to be presented; they do not need to read, or even be aware of, the complete stream of DL messages. DL Plus is a backwards compatible extension of the DL feature: the transmitted tags are not visible in the DL message so that listeners
41、with receivers without a DL Plus decoder still view the DL messages as before. For the broadcaster, the additional data rate (for tag transmission) is significantly less than the data rate necessary for text. A receiver can use the content classification and tagging in two different ways: by improvi
42、ng the presentation of the text messages and/or by providing the information to other applications and devices. DL messages may contain any kind of text: some will be quite general - news headlines, for example - whilst others relate directly to the audio - artist and title information, for example.
43、 In this latter case, special consideration is given to allow correct grouping of all the different item-related information and an unambiguous reference to the audio of the respective programme item. This timing information may also be used to ensure that the text and audio make sense for time-shif
44、ted programmes. DL Plus, by identifying text by content type, can automatically provide information to other devices like mobile phones, PDAs, PCs and personal audio players. This means listeners can interact with the radio station more easily because the transfer of telephone and SMS numbers, web a
45、ddresses and event information may be done with a single click. DL Plus is designed to stimulate the integration of radio with other devices in order to strengthen the competitiveness of radio with respect to other media and to gain new and greater audiences. Figure 1 illustrates the way that a DL P
46、lus decoder in a receiver processes the received DL message and DL Plus tags to create DL Plus objects that are then displayed or stored. In this example, the DL message contains the title and artist of a music item that is currently on air. These two pieces of text are tagged so that the receiver m
47、ay identify them and create the DL Plus objects. Figure 1: Simplified schematic of DL Plus object creation from DL message and DL Plus tags The DL Plus tags are carried in the PAD using the same mechanism as the DL message but utilizing the command feature of the DL application. Up to four DL Plus t
48、ags may correspond to a single DL message. DL Plus tags contain a content type, a start marker and a length marker to identify the piece of text to be assigned to a DL Plus object. The DL Plus objects may contain additional data fields, if so required by the receiver functionality. It is recommended
49、 to store a time stamp indicating the time when the corresponding DL message was received (see clause 8.2). This allows history oriented handling of the DL Plus objects, e.g. by assembling a play list with the last received programme items. DL Plus offers similar functionality to the FM-RDS RT+ feature (see annex C). g3You are listening to “A very famous song” by Big Celebrity DL Plus tag Content Type: Title Start marker: 22 Length marker: 18 DL message Title Artist DL Plus tag Content Type: Artist Start marker: 45 Length marker: 13 DL Plus object Content Typ
