Teletext decoders with inhibit means for precluding over-writing

Details Teletext decoders with inhibit means for precluding over-writing Teletext decoders with inhibit means for precluding over-writing

1989-10-05

1991-03-12

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358146, H04N 708

Patent

active

049997068

ABSTRACT:
In a teletext decoder, the digital codes for a requested page are acquired and stored in the page memory each time the page occurs in the recurrent teletext transmission cycle. This means that the stored digital codes are over-written in the page memory on each occurrence of the page. Where an acquired digital code has been changed for a different code in the decoder so as to display a special character, this different code has hitherto been over-written periodically by the original code, giving rise to a flicker in the display at the character position concerned. The present invention prevents this flicker by arranging the decoder to look at each stored digital code before it is over-written, and preventing the over-writing from occurring when the digital code pertains to a special character.

REFERENCES:
patent: 4679083 (1987-07-01), Schmitz et al.
patent: 4698677 (1987-10-01), Kinghorn et al.
patent: 4701794 (1987-10-01), Froling et al.
patent: 4719510 (1988-01-01), Kinghorn
patent: 4933764 (1990-06-01), Kinghorn
Broadcast Teletext Sepcification, Sep. 1976, Published by British Broadcasting Corp., Incorporated Broadcasting Authority, & British Radio Equipment Manufacuter Assoc., pp. 2-20.

Affiliated with

Also associated with

Rating

Teletext decoders with inhibit means for precluding over-writing does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Teletext decoders with inhibit means for precluding over-writing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Teletext decoders with inhibit means for precluding over-writing will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-451900