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ENHANCED TELETEXT SPECIFICATION
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Available format(s): Hardcopy, PDF
Language(s): English
Published date:
Publisher: European Telecommunications Standards Institute
Foreword1 Scope2 Normative references3 Definitions, symbols and abbreviations 3.1 Definitions 3.2 Symbols 3.3 Abbreviations4 TV lines usable as data lines 4.1 When multiplexed with a composite video signal 4.2 When not multiplexed with a composite video signal5 Signalling channel 5.1 Signalling method 5.2 Data Signal Levels 5.3 Bit Rate 5.4 Spectrum of data pulses6 Teletext packet identification 6.1 Clock run-in 6.2 Framing code 6.3 Timing reference7 Organization of Teletext data elements 7.1 Elements of a Teletext packet 7.2 Elements of a page 7.3 Elements of a magazine 7.4 Elements of the service8 Byte coding and error protection 8.1 Odd parity 8.2 Hamming 8/4 8.3 Hamming 24/189 Coding of data packets 9.1 Overview of packet types 9.2 Reserved bits 9.3 Directly displayable data packets 9.4 Page enhancement data packets 9.5 Magazine-Related Page Enhancement Data Packets 9.6 Packets for Page Linking 9.7 General Coding of packets 30 and 31 9.8 Broadcast Service Data Packets10 System Components for Presentation 10.1 Basic Teletext - Presentation Levels 1 and 1.5 10.2 Enhanced Teletext - Presentation Levels 2.5 and 3.5 10.3 Page Specific Enhancement Data 10.4 Magazine Specific Enhancement Data 10.5 Public Enhancement Data 10.6 Magazine Organization Table 10.7 Links between Enhanced System Components11 System Components for Navigation 11.1 Navigation via FLOF 11.2 Navigation via TOP 11.3 Magazine Inventory Page12 Presentation Levels 12.1 Display Components 12.2 Spacing attributes 12.3 Non-spacing attributes and additional characters 12.4 Colour Map 12.5 Side Panels13 Objects 13.1 Object definitions 13.2 Display priority order 13.3 Active Objects 13.4 Adaptive Objects 13.5 Passive Objects 13.6 Object invocation 13.7 Screen position of Object elements 13.8 Default Objects 13.9 Object example14 Dynamically Re-definable Characters 14.1 Downloading pages 14.2 DRCS Character Modes 14.3 Flashing DRCS 14.4 DRCS availability15 Character sets and their designation 15.1 Overview of designation requirements 15.2 Designation of default G0 and G2 sets and national option sub-sets 15.3 Second G0 Set Designation and National Option Set Selection 15.4 Modified G0 and G2 Character Set Designation 15.5 Spacing attributes 15.6 Alphanumeric Character Sets 15.7 Graphics Character SetsAnnex A (normative): Encoding Rules A.1 Page numbering A.2 Use of control bits C4 (Erase Page) and C8 (Update Indicator) A.3 Backwards compatibility in X/26 addressing A.4 Addressing order for enhancement triplets A.5 Rules for row and screen colours A.6 Object definition pages A.7 Rules for the overlapping and interleaving of objects A.8 Number of objects per page A.9 Coding of packets 8/30, Formats 1 and 2Annex B (normative): Transmission Rules B.1 Transmission of basic Teletext pages with a page erasure interval B.2 Transmission order of packets with Y = 26, 27 and 28 B.3 Serial mode transmission B.4 Parallel mode transmission B.5 Transmission of packets 8/30 B.6 Rules for the transmission of presentation enhancement data B.7 Transmission sequence of enhancement data for page updates B.8 Rules for the transmission of Magazine Inventory Pages (MIP)Annex C (normative): Decoding Rules C.1 Relationship between the display planes C.2 Rules for determining priorities of spacing and non-spacing attributes C.3 Rules applying to the size attributes C.4 Interpretation of character set and DRCS table changes at enhanced levels Annex D (normative): Default operation of decoders D.1 Page level D.2 Magazine level D.3 Service levelAnnex E (informative): Encoding aspects E.1 Page numbers for object definition and DRCS data pages E.2 Page Time-Code E.3 Use of packets X/26 in Level 1.5 transmissions E.4 Preferred use of packets X/27/4 and X/27/5 E.5 Character set designation E.6 Use of DRCS characters within objects E.7 Objects in row 24 E.8 Limits for global enhancement data E.9 Selection of national option sub-sets E.10 Characters including diacritical marks E.11 Invocation of default objectsAnnex F (informative): Transmission aspects F.1 Cycle Times F.2 Interrupted pages F.3 Packets M/29 F.4 Allocation of Teletext packets to VBI lines F.5 Use of lines 22 and 335 F.6 Teletext transmissions outside of the VBIAnnex G (informative): Decoding aspects G.1 Mixed mode operation of decoders G.2 Character display G.3 Behaviour of display attributes G.4 Minimum decoder configurationsAnnex H (informative): Code of Practice for navigation via FLOF H.1 Objectives H.2 Packets with Y = 27 for automatic page acquisition H.3 Packets with Y = 24 H.4 Fall-back conditionsAnnex I (informative): Navigation via Table Of Pages (TOP) I.1 Objectives I.2 Main principlesAnnex J (informative): Magazine Inventory Pages (MIP)Annex K (informative): VCR programming and control via TeletextAnnex L (informative): Use of Teletext Data for Automatic Channel InstallationAnnex M (informative): Data transmission via TeletextAnnex N (informative): Data broadcasting services N.1 Electronic Programme Guide (EPG) Annex O (informative): Relationship to earlier specificationsAnnex P (informative): Non-Teletext signals in the VBIAnnex Q (informative): BibliographyHistory
Provides the application of CCIR Teletext System B to CCIR 625 Line 50 field Television Systems B, D, G, H, I, K and L.
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