WO1999012336A3 - Full field teletext - Google Patents

Full field teletext Download PDF

Info

Publication number
WO1999012336A3
WO1999012336A3 PCT/IB1998/001288 IB9801288W WO9912336A3 WO 1999012336 A3 WO1999012336 A3 WO 1999012336A3 IB 9801288 W IB9801288 W IB 9801288W WO 9912336 A3 WO9912336 A3 WO 9912336A3
Authority
WO
WIPO (PCT)
Prior art keywords
full field
teletext
data
vertical blanking
blanking interval
Prior art date
Application number
PCT/IB1998/001288
Other languages
French (fr)
Other versions
WO1999012336A2 (en
Inventor
John Ritchie Kinghorn
David Robert Tarrant
Original Assignee
Koninkl Philips Electronics Nv
Philips Svenska Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koninkl Philips Electronics Nv, Philips Svenska Ab filed Critical Koninkl Philips Electronics Nv
Priority to JP51649799A priority Critical patent/JP2001505394A/en
Priority to EP98936634A priority patent/EP0935876A2/en
Publication of WO1999012336A2 publication Critical patent/WO1999012336A2/en
Publication of WO1999012336A3 publication Critical patent/WO1999012336A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/025—Systems for the transmission of digital non-picture data, e.g. of text during the active part of a television frame
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/025—Systems for the transmission of digital non-picture data, e.g. of text during the active part of a television frame
    • H04N7/035—Circuits for the digital non-picture data signal, e.g. for slicing of the data signal, for regeneration of the data-clock signal, for error detection or correction of the data signal

Abstract

In order to decode full field teletext data using conventional teletext decoders which only recognise teletext data contained in lines of the vertical blanking interval, the full field data is divided into a plurality of channels each occupying no more than the number of lines in a vertical blanking interval. The data from a selected one of the channels is delayed before being applied to the decoder so that it occurs within the following vertical blanking interval.
PCT/IB1998/001288 1997-08-30 1998-08-19 Full field teletext WO1999012336A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP51649799A JP2001505394A (en) 1997-08-30 1998-08-19 Teletext
EP98936634A EP0935876A2 (en) 1997-08-30 1998-08-19 Decoding of reproduced or received teletext data

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9718325.5A GB9718325D0 (en) 1997-08-30 1997-08-30 Teletext
GB9718325.5 1997-08-30

Publications (2)

Publication Number Publication Date
WO1999012336A2 WO1999012336A2 (en) 1999-03-11
WO1999012336A3 true WO1999012336A3 (en) 1999-06-03

Family

ID=10818222

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1998/001288 WO1999012336A2 (en) 1997-08-30 1998-08-19 Full field teletext

Country Status (6)

Country Link
EP (1) EP0935876A2 (en)
JP (1) JP2001505394A (en)
KR (1) KR20000068854A (en)
GB (1) GB9718325D0 (en)
TW (1) TW388179B (en)
WO (1) WO1999012336A2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2231470A (en) * 1989-05-25 1990-11-14 Sony Corp Teletext decoder with reduced page-access time
EP0401873A2 (en) * 1982-05-14 1990-12-12 Communications Patents Limited A communications system
EP0608960A1 (en) * 1993-01-28 1994-08-03 Philips Electronics Uk Limited Data recording and/or reproducing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0401873A2 (en) * 1982-05-14 1990-12-12 Communications Patents Limited A communications system
GB2231470A (en) * 1989-05-25 1990-11-14 Sony Corp Teletext decoder with reduced page-access time
EP0608960A1 (en) * 1993-01-28 1994-08-03 Philips Electronics Uk Limited Data recording and/or reproducing

Also Published As

Publication number Publication date
WO1999012336A2 (en) 1999-03-11
GB9718325D0 (en) 1997-11-05
JP2001505394A (en) 2001-04-17
EP0935876A2 (en) 1999-08-18
KR20000068854A (en) 2000-11-25
TW388179B (en) 2000-04-21

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