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1、BRITISH STANDARD BS EN ? 62298-2:2005 Teleweb application Part 2: Delivery methods The European Standard EN 62298-2:2005 has the status of a British Standard ICS 33.170; 35.240.99 ? Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 06:56:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 62298
2、-2:2005 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2005 BSI 31 October 2005 ISBN 0 580 46512 8 National foreword This British Standard is the official English language version of EN 62298-2:2005. It is identical with IEC 62298
3、-2:2005. The UK participation in its preparation was entrusted to Technical Committee EPL/100, Audio, video and multimedia systems and equipment, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The B
4、ritish Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards
5、Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the respo
6、nsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover,
7、the EN title page, pages 2 to 38, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 06:56:41 GMT+00:0
8、0 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD EN 62298- 2 NORME EUROPENNE EUROPISCHE NORM June 2005 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Cent r al Secr et ar i at : r ue
9、 de St assar t 35, B - 1050 Br ussel s 2005 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 62298-2:2005 E ICS 33.170; 35.240.99 English version Tel eweb appl i cat i on Par t 2: Del i very m et hods (IEC 62298-2:2005) Application
10、 Teleweb Partie 2: Mthodes de distribution (CEI 62298-2:2005) TeleWeb-Anwendung Teil 2: bertragungsverfahren (IEC 62298-2:2005) This European Standard was approved by CENELEC on 2005-06-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions f
11、or giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three off
12、icial versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical com
13、mittees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sh
14、effieldun sheffieldun, na, Mon Nov 13 06:56:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Forew ord The text of document 100/923/FDIS, future edition 1 of IEC 62298-2, prepared by IEC TC 100, Audio, video and multimedia systems and equipment, was submitted to the IEC-CENELEC parallel vote and was ap
15、proved by CENELEC as EN 62298-2 on 2005-06-01. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2006-03-01 - latest date by which the national standards conflicting with the EN
16、 have to be withdrawn (dow) 2008-06-01 Annex ZA has been added by CENELEC. _ Endorsem ent not i ce The text of the International Standard IEC 62298-2:2005 was approved by CENELEC as a European Standard without any modification. _ EN 62298-2:2005 2 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov
17、13 06:56:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3 CONTENTS INTRODUCTION.4 1Scope.5 2Normative references .5 3Terms, definitions and abbreviations 6 3.1Terms and definitions 6 3.2Abbreviations 7 4Delivery profiles .7 4.1TeleWeb delivered via Teletext packets in VBI lines7 4.2TeleWeb delivered
18、via PES packets in an MPEG-2 TS 8 4.3TeleWeb delivered via DSM-CC sections in an MPEG-2 TS 9 4.4TeleWeb delivered via other methods9 5Transport layer protocols9 5.1DSM-CC data carousel9 5.2Interaction channel24 6TeleWeb DSM-CC transmission via Teletext.28 6.1Transmission of data carousels .28 6.2Tra
19、nsmission protocol .28 6.3Teletext packet format .29 7Signalling TeleWeb in DVB.30 7.1Signalling in the program map table (PMT)30 7.2Signalling in the service description table (SDT)32 7.3Service detection time.34 7.4Multiple TeleWeb services.34 8Transport in DVB34 8.1Transport in PES packets34 8.2T
20、ransport in DSM-CC sections 34 Annex A (informative)CCITT CRC-16.35 Annex ZA (normative) Normative references to international publications with their corresponding European publications 37 Bibliography. 36 Figure 1 Delivery method for TeleWeb using Teletext packets in VBI lines 8 Figure 2 Delivery
21、method for TeleWeb using PES packets in an MPEG-2 TS 8 Figure 3 Delivery method for TeleWeb using DSM-CC sections in an MPEG-2 TS 9 Figure 4 Structure of one-layer and two-layer data carousels 10 Figure 5 Format of transactionId field 12 Figure 6 Format of the profile_flags byte. 23 Figure 7 Message
22、 transmission sequence. 28 EN 62298-2:2005 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 06:56:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI INTRODUCTION The aim of TeleWeb is to deliver World Wide Web-style content to the living-room TV to give the viewer an enhanced television experience.
23、 A TeleWeb service broadcasts data files containing text and high-definition graphics to suitable decoders. The data transmitted can be closely linked to events within the accompanying TV programmes or can be more general in nature to emulate a traditional, but higher definition, superteletext servi
24、ce. Different profiles are defined. It is intended that TV-based decoders be implemented in a cost-effective manner without recourse to the technology normally associated with personal computers. In part, this is achieved by limiting the number of different types of multimedia data that can be used
25、within a service. By careful design of the user interface, decoder manufacturers will be able to offer easy-to-use equipment for accessing TeleWeb services without requiring the consumer to be computer-literate. In addition, they will be able to customize their products to differentiate them from th
26、ose of their competitors. This standard focuses on the transmission layer. 4 EN 62298-2:2005 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 06:56:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI TELEWEB APPLICATION Part 2: Delivery methods 1 Scope This part of IEC 62298 specifies the transmissi
27、on layer of TeleWeb. TeleWeb services can be broadcast in a number of different ways, for example, VBI, DVB, DAB, etc., and to a variety of decoder types, for example, TVs, portable decoders, PCs, etc. This standard specifies the transmission layer for VBI and DVB broadcasts. 2 Normative references
28、The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 62298-1: TeleWeb application Part 1: General
29、description IEC 62298-3: TeleWeb application Part 3: Superteletext profile IEC 62298-4: TeleWeb application Part 4: Hyperteletext profile1 ISO/IEC 13818-1, Information technology Generic coding of moving pictures and associated audio information: Systems ISO/IEC 13818-6, Information technology Gener
30、ic coding of moving pictures and associated audio information Part 6: Extension for DSM-CC ISO 639-2, Codes for the representation of names of languages Part 2: Alpha-3 code ISO 8859-1, Information technology 8-bit single-byte coded graphic character sets Part 1: Latin alphabet No. 1 ETSI TR 101 154
31、: V1.4.1, Digital Video Broadcasting (DVB); Implementation guidelines for the use of MPEG-2 Systems, Video and Audio in satellite, cable and terrestrial broadcasting applications ETSI TR 101 202, Implementation guidelines for data broadcasting, V1.1.1 ETSI EN 300 421, Digital Video Broadcasting (DVB
32、); Framing structure, channel coding and modulation for 11/12 GHz satellite services ETSI EN 300 429, Digital Video Broadcasting (DVB); Framing structure, channel coding and modulation for cable systems 1 To be published. 5 EN 62298-2:2005 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 06:56
33、:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ETSI EN 300 706, Enhanced Teletext Specification ETSI EN 300 708, Television Systems; Data Transmission within Teletext ETSI EN 300 744, Digital Video Broadcasting (DVB); Framing structure, channel coding and modulation for digital terrestrial televisio
34、n ETSI EN 301 192, Digital Video Broadcasting (DVB); DVB specification for data broadcasting, V1.2.1 ETSI ETS 300 472, Digital Video Broadcasting (DVB); Specification for conveying ITU-R System B Teletext in DVB bit streams 3 Terms, definitions and abbreviations 3.1 Terms and definitions For the pur
35、poses of the present document, the following terms and definitions apply. 3.1.1 bit ordering in all schematics, numeric values ordered with the most significant bit at the left-hand side and the least significant bit at the right-hand side 3.1.2 conditional access (CA) mechanism by which user access
36、 to service components can be restricted 3.1.3 Independent Data Line (IDL) stand-alone Teletext packet containing both control and application data. It does not form part of a Teletext page. The packet address is either 30 or 31 3.1.4 module when broadcast within a DSM-CC data carousel, the contents
37、 of a file and its attributes (for example, file type, creation date, etc.) are transmitted separately. The file itself is carried by a number of DDB messages and its attributes appear as descriptors within its module loop within a DII control message 3.1.5 signed integer positive or negative intege
38、r value, in decimal notation. The first digit is preceded by a mandatory plus (+) or minus () symbol with no white space between the symbol and the first digit 3.1.6 text string sequence of displayable Latin-1 characters 3.1.7 unsigned integer integer value, in decimal notation, not preceded by a pl
39、us (+) or minus () symbol 6 EN 62298-2:2005 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 06:56:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 3.2 Abbreviations BSLBF Bit String, Left Bit First CA Conditional Access CRC Cyclic Redundancy Check DAB Digital Audio Broadcasting DDB Download Data
40、 Block message DII Download Info Indication message DSI Download Server Initiate message DSM-CC Digital Storage Media Command and Control DVB Digital Video Broadcasting ETS European Telecommunication Standard HTML Hyper Text Mark-up Language IDL Independent Data Line IEC International Electrotechnic
41、al Commission ISO International Organisation for Standardization LSB Least Significant Bit MJD Modified Julian Date MPEG Moving Picture Experts Group MSB Most Significant Bit OSI Open Systems Interconnection PES Packetized Elementary Stream PID Packet Identifier PMT Program Map Table RFC Internet Re
42、quests for Comments RPCHOF Remainder Polynomial Coefficient, Higher Order First SDT Service Description Table TS Transport Stream UIMSBF Unsigned Integer Most Significant Bit First URL Uniform Resource Locator UTC Universal Time Coordinated VBI Vertical Blanking Interval 4 Delivery profiles There ar
43、e several ways in which a TeleWeb application can be delivered (see Figure 1 in IEC 62298-1). For the purposes of this document, a delivery profile specifies layers 1 to 4 of the OSI seven-layer model. 4.1 TeleWeb delivered via Teletext packets in VBI lines Figure 1 shows layers 1 to 4 of the OSI se
44、ven-layer model for delivering a TeleWeb service via Teletext packets. The application files are formed into a DSM-CC data carousel at the transport layer, as defined in 5.1. The components of the carousel are then encapsulated in independent Teletext data packets (see 6.3). These are transmitted in
45、 the VBI lines of an analog TV signal as described in ETSI EN 300 708. 7 EN 62298-2:2005 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 06:56:41 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Layer Generic content TeleWeb specific content Layer 4: Transport Arranging the data in a suitable way f
46、or transport DSM-CC data carousel: Blocks and modules Descriptors Groups and supergroups Delimiting between messages Forward error correction Layer 3: Network Logical functions related to the multiplexing and demultiplexing of data packets belonging to different communications flows: Data channel ad
47、dressing Data packet sequencing Format B independent data line as defined in ETSI EN 300 708 (“Packet 31”) Layer 2: Link Logical functions related to data transmission: Byte synchronization Error control (framing, misdirection and false detection) Data formatting Normal Teletext packet format as def
48、ined in ETSI EN 300 706 Layer 1: Physical Electrical transmission of the data signal Normal Teletext parameters as defined in ETSI EN 300 706 Figure 1 Delivery method for TeleWeb using Teletext packets in VBI lines 4.2 TeleWeb delivered via PES packets in an MPEG-2 TS Figure 2 shows layers 1 to 4 of
49、 the OSI seven-layer model for delivering a TeleWeb service via Teletext packets. The application files are formed into a DSM-CC data carousel at the transport layer, as defined in 5.1. The components of the carousel are then encapsulated in independent Teletext data packets (see 6.3). These are transmitted in an MPEG-2 transport stream using PES packets as described in ETSI ETS 300 472. NOTE? The data is p