Teletext decoder with page update indication

Details Teletext decoder with page update indication Teletext decoder with page update indication

1996-06-14

1998-03-17

Peng, John K.

Television

Nonpictorial data packet in television format

Including teletext decoder or display

348469, H04N 7087

Patent

active

057292981

ABSTRACT:
A television receiver including a teletext decoder for receiving and displaying teletext pages for signalling that a requested teletext has been changed or not changed with respect to the previous consultation of the relevant page. To this end the receiver forms a checkword upon reception of a teletext page, which checkword is representative of the contents of the page, and compares this with the checkword stored upon previous display of the page.

REFERENCES:
patent: 4337485 (1982-06-01), Chambers
patent: 4633297 (1986-12-01), Sterlos et al.
patent: 4953022 (1990-08-01), Bugg
patent: 5038212 (1991-08-01), Van Den Hambergh et al.
patent: 5208567 (1993-05-01), Tarrant
patent: 5237411 (1993-08-01), Fink et al.
patent: 5374961 (1994-12-01), Jung
patent: 5410359 (1995-04-01), Odijk et al.
"VPV-Videotext Programs Video Recorder" IEEE Transactions on Consumer Electronics, vol. 34, No. 3, Aug. 1988.
Technical Publication 112 "Computer Controlled Teletext (CCT)", Philips Electronic Components and Materials.
"Broadcast Teletext Specification", British Broadcasting Corporation, Sep. 1976, pp. 1-20.

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