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1. (WO1999012336) FULL FIELD TELETEXT

Pub. No.:    WO/1999/012336    International Application No.:    PCT/IB1998/001288
Publication Date: Mar 11, 1999 International Filing Date: Aug 19, 1998
IPC: H04N 7/025
H04N 7/035
Applicants: KONINKLIJKE PHILIPS ELECTRONICS N.V.
PHILIPS AB
Inventors: KINGHORN, John, Ritchie
TARRANT, David, Robert
Title: FULL FIELD TELETEXT
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.