EN 300 706 : 1.2.1

Intellectual Property Rights
Foreword
1 Scope
2 References
3 Definitions, symbols and abbreviations
   3.1 Definitions
   3.2 Symbols
   3.3 Abbreviations
4 TV lines usable as data lines
   4.1 When multiplexed with a composite video signal
   4.2 When not multiplexed with a composite video signal
5 Signalling characteristics
   5.1 Signalling method
   5.2 Data Signal Levels
   5.3 Bit Rate
   5.4 Spectrum of data pulses
6 Teletext packet identification
   6.1 Clock run-in
   6.2 Framing code
   6.3 Timing reference
7 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 service
8 Byte coding and error protection
   8.1 Odd parity
   8.2 Hamming 8/4
   8.3 Hamming 24/18
9 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 Packets
10 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 Components
11 System Components for Navigation
   11.1 Navigation via FLOF
   11.2 Navigation via TOP
   11.3 Magazine Inventory Page
12 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 Panels
13 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 example
14 Dynamically Re-definable Characters
   14.1 Downloading pages
   14.2 DRCS Character Modes
   14.3 Flashing DRCS
   14.4 DRCS availability
15 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 Sets
Annex A (normative): Page addresses
      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 2
      A.10 Reserved page number
Annex 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)
      B.9 Maximum time between successive packets of a page
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 level
Annex 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 Character cells addressable by objects
      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 objects
      E.12 Coding of default objects
      E.13 Use of Start and End box spacing attributes
      E.14 Real-time clock Page Header Packets
      E.15 Recommended and default page numbers
Annex 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 VBI
Annex G (informative): Decoding aspects
      G.1 Mixed mode operation of decoders
      G.2 Character displays
      G.3 Behaviour of display attributes
      G.4 Minimum decoder configurations
      G.5 Order of invocation of default objects
Annex 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 conditions
Annex I (informative): Navigation via Table Of Pages (TOP)
      I.1 Objectives
      I.2 Main principles
Annex J (informative): Magazine Inventory Pages (MIP)
Annex K (informative): VCR programming and control via Teletext
Annex L (informative): Use of Teletext Data for Automatic
        Channel Installation
Annex M (informative): Data transmission via Teletext
Annex N (informative): Data broadcasting services
      N.1 Electronic Programme Guide (EPG)
Annex O (informative): Relationship to earlier specifications
Annex P (informative): Non-Teletext signals in the VBI
Annex Q (informative): Triggering data broadcasting applications
Annex R (informative): Bibliography
History

Describes the application of CCIR Teletext System B to CCIR 625 Line 50 field Television Systems B, D, G, H, I, K and L. The System is optimized for broadcast media using cable, terrestrial and satellite transmission and the associated service and product environment.