1、 ETSI TS 101 498-3 V2.1.1 (2005-10)Technical Specification Digital Audio Broadcasting (DAB);Broadcast website;Part 3: TopNews basic profile specificationEuropean Broadcasting Union Union Europenne de Radio-Tlvision EBUUER ETSI ETSI TS 101 498-3 V2.1.1 (2005-10) 2 Reference DTS/JTC-DAB-41 Keywords au
2、dio, broadcasting, DAB, digital, receiver ETSI 650 Route 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 Indiv
3、idual copies of the present document can be downloaded from: http:/www.etsi.org 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 Documen
4、t Format (PDF). In case of dispute, 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 cur
5、rent status of this and other ETSI documents is available 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 reprodu
6、ced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2005. European Broadcasting Union 2005. All rights reserved. DECTTM, PLUGTESTSTM and UMTSTM are Trade Marks of ETSI registe
7、red for the benefit of its Members. TIPHONTMand the 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 101 498-3 V2.1.1 (2005-10)
8、 3 Contents Intellectual Property Rights4 Foreword.4 Introduction 4 1 Scope 6 2 References 6 3 Abbreviations .7 4 Syntax specification .7 5 TopNews basic profile specification 7 5.1 Introduction 7 5.2 The TopNews MOT carousel .8 5.3 MOT parameters for individual objects8 5.3.1 MOT Header Core settin
9、gs .9 5.3.2 The ProfileSubset parameter.9 5.3.3 The ContentName parameter 9 5.3.3.1 The ContentName parameter for interoperability .9 5.3.4 The UniqueBodyVersion parameter .10 5.3.5 The ContentSorting parameter10 5.3.5.1 TopNews Object type11 5.3.5.2 Presentation order of categories 11 5.3.5.3 Prese
10、ntation order of message objects.11 5.3.5.4 Message objects in multiple categories.11 5.3.6 The ContentDescription parameter .12 5.3.7 The Headline parameter12 5.3.8 The Duration parameter 12 5.3.9 The PresentationThreshold parameter, individual 13 5.4 MOT parameters for the entire carousel.13 5.4.1
11、 The SortedHeaderInformation parameter .13 5.4.2 The SpecialEntry parameter14 5.4.3 The PresentationThreshold parameter, entire .14 5.5 Other MOT parameters 15 5.6 Application Signalling15 6 TopNews Application Structure.15 6.1 Supported content types .15 6.1.1 Content type audio15 6.1.1.1 MP2 param
12、eters 15 6.1.1.2 MP3 parameters 16 6.2 Meta data for enhanced interoperability.16 6.2.1 ID3 tags.16 6.2.2 Playlists / application meta data16 6.3 Category structure and signalling.17 6.4 Object life cycle .18 6.5 Navigation controls 18 6.5.1 Change category .18 6.5.2 Change message19 6.6 Quality of
13、Service parameters 19 6.6.1 Transport channel limitations .19 6.6.2 Maximum object size19 6.6.3 Minimum receiver cache size .19 6.6.4 Minimum receiver audio characteristics .19 6.6.5 Minimum receiver display characteristics 19 6.6.6 Maximum carousel period 20 History 21 ETSI ETSI TS 101 498-3 V2.1.1
14、 (2005-10) 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 any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellec
15、tual 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 to the ETSI IPR Policy, no investiga
16、tion, 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. Foreword This Technical Specificat
17、ion (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 Broadcast was established in 1990 to co
18、-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 receivers. The EBU is
19、 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 headquarters is
20、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 audio and data to fixed, portable or m
21、obile 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 are drawn from broadcasting organizations and telecommunication providers together with companies from the profes
22、sional and consumer electronics industry. NOTE 2: DAB is a registered trademark owned by one of the Eureka Project 147 partners. The present document is part 3 of a multi-part deliverable. Full details of the entire series can be found in part 1 4. Introduction The growth of the Internet and the pop
23、ularity of compressed audio in MP3 format makes audio based information services an extremely attractive way of providing information to users. Additionally audio data services are of huge interest in particular for in-car applications. MP2 and MP3 compression is the de facto standard on the Interne
24、t. This format is widely used and well supported for distribution of audio files and TopNews is a service that takes advantage of this development. The public has already accepted this technology that is now common both in the home and in the workplace. New types of devices have been created to acco
25、mmodate for the popularity MP3 has reached: Portable devices based on CD, MMC or other types of storage media. Home receivers, that can handle MP3 from CD or hard disk. Car stereos, capable of playing MP3 from CD-ROM. ETSI ETSI TS 101 498-3 V2.1.1 (2005-10) 5 TopNews gives DAB multiplex operators an
26、d service providers the opportunity to use for instance MP2 or MP3 as compressed audio content format. This supports information services by using the concept of a file or object download to the receiver that provides storage capacity for those objects (push and store). The application range for DAB
27、 value added services is dramatically enhanced with TopNews and this type of service is only feasible with a digital broadcast system. TopNews is designed to allow an entire bouquet of information to be delivered to a receiver using the broadcast channel of DAB. The information, like news or sport m
28、essages, is prepared as compressed audio objects by the service provider. These message objects are transmitted and then stored inside the receiver. The objects are sorted by freely definable categories. Index objects support the navigation within this collection of message objects. A category index
29、 is played back every time the user enters a specific category. ETSI ETSI TS 101 498-3 V2.1.1 (2005-10) 6 1 Scope The present document specifies how to create a broadcast carousel of objects for an audio information service. TopNews allows a service provider to deliver compressed audio, for instance
30、 MP3, via digital radio. Receivers may then extract information directly from this carousel and store it in the receiver in order to present the service. To simplify the delivery of additional text and image files TopNews is designed as a profile of the Broadcast Website user application (TS 101 498
31、-1 4). BWS itself and TopNews are based on the MOT protocol (EN 301 234 3). 2 References 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 and/or edition n
32、umber or version number) or non-specific. For a specific reference, subsequent revisions do not apply. For a non-specific reference, the latest version applies. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Referenc
33、e. 1 ETSI EN 300 401: “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 EN 301 234: “Digital Audio Broadcasting (DAB); Multimedia Object Transfer (MOT) protocol“. 4
34、ETSI TS 101 498-1: “Digital Audio Broadcasting (DAB); Broadcast website; Part 1: User application specification“. 5 ISO/IEC 11172-3 (1993): “Information technology - Coding of moving pictures and associated audio for digital storage media at up to 1,5 Mbit/s - Part 3: Audio“. 6 ISO/IEC 13818-3: “Inf
35、ormation technology - Generic coding of moving picture and associated audio information - Part 3: Audio“. 7 ISO/IEC 10646: “Information technology - Universal Multiple-Octet Coded Character Set (UCS)“. 8 id3v2.4.0-structure: “ID3 tag version 2.4.0 - Main Structure“. NOTE: See http:/www.id3.org/id3v2
36、.4.0-structure.txt. ETSI ETSI TS 101 498-3 V2.1.1 (2005-10) 7 3 Abbreviations For the purposes of the present document, the following abbreviations apply: BWS Broadcast Web Site DAB Digital Audio Broadcasting HTML Hyper Text Markup Language kbps Kbit / second MOT Multimedia Object Transfer MP2 MPEG
37、1 or 2, Audio Layer 2 MP3 MPEG 1 or 2, Audio Layer 3 PDA Personal Digital Assistant TN TopNews 4 Syntax specification The specifications of syntax that appear in the present document are written using a form of pseudo-code that is similar to the procedural language C; this provides for easy specific
38、ation of loops and conditional data structures. Within these specifications, the type of individual data fields is expressed using the mnemonics given in table 1. Table 1: Data type mnemonics for syntax specification Mnemonic Description Uimsbf Unsigned integer, most significant bit first 5 TopNews
39、basic profile specification The profile specified in the following clauses defines the profile for the MOT Broadcast Web Site user application corresponding to the ProfileId value 0x02. 5.1 Introduction TopNews uses the MOT protocol. It allows a service provider to deliver compressed audio files (e.
40、g. MP3) via DAB. Since TopNews is based on the BWS application, all necessary provisions on the content creation and distribution side are already available. MOT TopNews is easy to implement on both the broadcast side as well as on the receiver side. TopNews itself is flexible and can be further enh
41、anced in the future by defining extensions and additional profiles. TopNews has to handle a large number of short audio objects in many different categories (for example traffic messages) but also a small number of long audio objects. It is possible that the TopNews content itself is not characteris
42、ed as single unit but as a collection of independent objects. Therefore the receiver should always be able to decode the TopNews data and start presenting objects as soon as they are received. Over time, the number of objects and categories increases until all objects have been received. From time t
43、o time, the number of categories and the number of objects within the categories may change dynamically. TopNews is embedded in the Broadcast Web Site user application as its own profile. This allows on the one hand easy integration of additional text and images to TopNews data in the future and on
44、the other hand easy integration of TopNews objects in other BWS profiles. So TopNews can be combined with already existing visual HTML based profiles of BWS. ETSI ETSI TS 101 498-3 V2.1.1 (2005-10) 8 5.2 The TopNews MOT carousel The data for TopNews shall be carried as TopNews profile in the MOT BWS
45、 user application (TS 101 498-1 4). Being a profile of the BWS user application implies the use of the MOT directory mode. The MOT data carousel can be transported in PAD or in a packet mode channel. TopNews can be linked logically to an audio service or it can be a stand-alone TopNews data service.
46、 The following extensions and restrictions apply for this TopNews basic profile: The directory entries of the MOT directory shall be sorted in ascending order of the ContentName parameter at the service provider side (this reduces the complexity for MOT directory comparison, see clause 5.4.1). No tr
47、ansport level compression of the MOT directory is allowed (this reduces the complexity for MOT directory decoding). The MOT directory shall remain unchanged for a minimum period of 2 minutes. NOTE: Due to reception errors, a receiver might be unable to get an error free reception of an MOT body befo
48、re transmission of the next MOT body starts. Appropriate measures need to be taken to ensure that in case of reception errors the MOT body can be completed during the next repetition(s) of the MOT body. Within the MOT carousel, MOT parameters can be associated with individual objects by placing them
49、 in the MOT Header core and the MOT Header Extensions. MOT parameters referring to the complete set of objects are placed into the MOT directory extension. Only extensions or restrictions of the MOT standard (EN 301 234 3) or the BWS user application (TS 101 498-1 4) are specified within the present document. 5.3 MOT parameters for individual objects MOT parameters that are to be applied to individual MOT objects are carried in the MOT header of each directory entry in the MOT directory. A summary of the use of MOT param
