1、BRITISH STANDARDBS EN 62298-2:2005Teleweb application Part 2: Delivery methodsThe European Standard EN 62298-2:2005 has the status of a British StandardICS 33.170; 35.240.99g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g5
2、1g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 62298-2:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 October 2005 BSI 31 October 2005ISBN 0 580 46512 8National forewordThis British Standard is the offi
3、cial English language version of EN 62298-2:2005. It is identical with IEC 62298-2:2005. 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 thi
4、s committee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogueunder the section entitled “International Standards Correspondence Index”, or by using th
5、e “Search” facility of the BSI Electronic Catalogue or of British Standards 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 leg
6、al obligations. aid enquirers to understand the text; present to the responsible 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.Summar
7、y of pagesThis document comprises a front cover, an inside front cover, 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 publicationAmd. No. Date CommentsEUR
8、OPEAN STANDARD EN 62298-2NORME EUROPENNE EUROPISCHE NORM June 2005 CENELECEuropean Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2005 CENELEC -
9、 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 Teleweb application Part 2: Delivery methods (IEC 62298-2:2005)Application Teleweb Partie 2: Mthodes de distribution (CEI 62298-2:2005) Te
10、leWeb-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 for giving this European Standard the status of a national standa
11、rd 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 official versions (English, French, German). A version in any other
12、 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 committees of Austria, Belgium, Cyprus, Czech Republic, Denmark, Es
13、tonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Foreword The text of document 100/923/FDIS, future edition 1 of IEC 62298-2, prep
14、ared by IEC TC 100, Audio, video and multimedia systems and equipment, was submitted to the IEC-CENELEC parallel vote and was approved 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 iden
15、tical national standard or by endorsement (dop) 2006-03-01 - latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2008-06-01 Annex ZA has been added by CENELEC. _ Endorsem ent notice The text of the International Standard IEC 62298-2:2005 was approved by CEN
16、ELEC as a European Standard without any modification. _ EN 62298-2:2005 2 3 CONTENTSINTRODUCTION.41 Scope.52 Normative references .53 Terms, definitions and abbreviations 63.1 Terms and definitions 63.2 Abbreviations 74 Delivery profiles .74.1 TeleWeb delivered via Teletext packets in VBI lines 74.2
17、 TeleWeb delivered via PES packets in an MPEG-2 TS 84.3 TeleWeb delivered via DSM-CC sections in an MPEG-2 TS 94.4 TeleWeb delivered via other methods95 Transport layer protocols95.1 DSM-CC data carousel95.2 Interaction channel246 TeleWeb DSM-CC transmission via Teletext.286.1 Transmission of data c
18、arousels .286.2 Transmission protocol .286.3 Teletext packet format .297 Signalling TeleWeb in DVB.307.1 Signalling in the program map table (PMT)307.2 Signalling in the service description table (SDT)327.3 Service detection time .347.4 Multiple TeleWeb services.348 Transport in DVB348.1 Transport i
19、n PES packets348.2 Transport in DSM-CC sections 34Annex A (informative) CCITT CRC-16.35Annex ZA (normative) Normative references to international publications with their correspondingEuropean publications 37Bibliography.36Figure 1 Delivery method for TeleWeb using Teletext packets in VBI lines 8Figu
20、re 2 Delivery method for TeleWeb using PES packets in an MPEG-2 TS 8Figure 3 Delivery method for TeleWeb using DSM-CC sections in an MPEG-2 TS 9Figure 4 Structure of one-layer and two-layer data carousels 10Figure 5 Format of transactionId field 12Figure 6 Format of the profile_flags byte. 23Figure
21、7 Message transmission sequence. 28EN 62298-2:2005INTRODUCTION 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. A TeleWeb service broadcasts data files containing text and high-definition graphics to suitable de
22、coders. 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 service. Different profiles are defined. It is intended that TV-based decoders be implemented in a cost-e
23、ffective 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 within a service. By careful design of the user interface, decoder manufacturers will be able to off
24、er 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 those of their competitors. This standard focuses on the transmission layer. 4 EN 62298-2:2005TELEWEB
25、APPLICATION Part 2: Delivery methods 1 Scope This part of IEC 62298 specifies the transmission 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 s
26、tandard specifies the transmission layer for VBI and DVB broadcasts. 2 Normative references 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 do
27、cument (including any amendments) applies. IEC 62298-1: TeleWeb application Part 1: General descriptionIEC 62298-3: TeleWeb application Part 3: Superteletext profileIEC 62298-4: TeleWeb application Part 4: Hyperteletext profile1ISO/IEC 13818-1, Information technology Generic coding of moving picture
28、s and associated audio information: Systems ISO/IEC 13818-6, Information technology Generic 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-
29、bit single-byte coded graphic character sets Part 1: Latin alphabet No. 1 ETSI TR 101 154: 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
30、guidelines for data broadcasting, V1.1.1 ETSI EN 300 421, Digital Video Broadcasting (DVB); 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 1To be p
31、ublished. 5 EN 62298-2:2005ETSI 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 television ETSI EN 301 192, D
32、igital 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 purposes of the present
33、 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 to service componen
34、ts 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 of a file and its a
35、ttributes (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 integer value, in decimal
36、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 plus (+) or minus () s
37、ymbol 6 EN 62298-2:20053.2 Abbreviations BSLBF Bit String, Left Bit First CA Conditional Access CRC Cyclic Redundancy Check DAB Digital Audio Broadcasting DDB Download Data Block message DII Download Info Indication message DSI Download Server Initiate message DSM-CC Digital Storage Media Command an
38、d Control DVB Digital Video Broadcasting ETS European Telecommunication Standard HTML Hyper Text Mark-up Language IDL Independent Data Line IEC International Electrotechnical Commission ISO International Organisation for Standardization LSB Least Significant Bit MJD Modified Julian Date MPEG Moving
39、Picture Experts Group MSB Most Significant Bit OSI Open Systems Interconnection PES Packetized Elementary Stream PID Packet Identifier PMT Program Map Table RFC Internet Requests for Comments RPCHOF Remainder Polynomial Coefficient, Higher Order First SDT Service Description Table TS Transport Strea
40、m UIMSBF Unsigned Integer Most Significant Bit First URL Uniform Resource Locator UTC Universal Time Coordinated VBI Vertical Blanking Interval 4 Delivery profiles There are several ways in which a TeleWeb application can be delivered (see Figure 1 in IEC 62298-1). For the purposes of this document,
41、 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 seven-layer model for delivering a TeleWeb service via Teletext packets. The application files are formed into a DSM-CC data carou
42、sel 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 the VBI lines of an analog TV signal as described in ETSI EN 300 708. 7 EN 62298-2:2005Layer Generic content TeleWeb specific c
43、ontent Layer 4: Transport Arranging the data in a suitable way for 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 pack
44、ets belonging to different communications flows: Data channel addressing 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
45、 detection) Data formatting Normal Teletext packet format as defined 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
46、 via PES packets in an MPEG-2 TS Figure 2 shows layers 1 to 4 of 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 encapsulat
47、ed 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 prepared as it would be for transmitting in 4.1, added to a transport stream and treated as an analog Teletext service. Layer Ge
48、neric content TeleWeb specific content Layer 4: Transport Arranging the data in a suitable way for transport Embedding in DSM-CC data carousel as specified in this standard Layer 3: Network Logical functions related to the multiplexing and demultiplexing of data packets belonging to different commun
49、ications flows: Data channel addressing Data packet sequencing Embedding in Format B independent data line as defined in ETSI EN 300 708 (“Packet 31”) Layer 2: Link Logical functions related to the data transmission:Byte synchronization Error control (framing, misdirection and false detection) Data formatting Embedding in an MPEG-2 transport stream using PES packets ETSI ETS 300 472 Layer 1: Physical Electrical transmission of the data signal Multiplexing and transmission according t
