Teletext communication system with timed multipage local memory

Details Teletext communication system with timed multipage local memory Teletext communication system with timed multipage local memory

1981-04-13

1983-06-14

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358142, 358146, H04N 708

Patent

active

043886450

ABSTRACT:
A teletext communications system comprises a transmitter, e.g. an orbiting satellite, transmitting multiple pages of a teletext encoded data service at selected times of the day, each teletext page including a first non-displayable auxiliary teletext data row defining a selected time interval and a unique page memory address code. The transmitter also continuously transmits a second non-displayable auxiliary teletext data row including a time of day code. A teletext decoder is adapted for acquiring and storing each transmitted teletext page at a page memory defined by said page memory address code and automatically rebroadcasts each of the stored pages for which the stored selected time interval coincides with the transmitted time of day code.

REFERENCES:
patent: 3961137 (1976-06-01), Hutt
patent: 4175267 (1979-11-01), Tachi
Wireless World Teletext Decoder 3-Line and Clock Dividers, J. Daniels, Wireless World, Jan. 1976, pp. 37-42.
Ceefax: A Proposed New Broadcasting Service, by Edwardson and Gee, Jan. 1974, Journal of the SMPTE, vol. 83, pp. 14-19.
Oracle--Broadcasting The Written Word, by A. James, Wireless World, Jul. 1973, pp. 314-316.
Teletext Remote Control-2, Interfacing The Remote Control Receiver With The Original Decoder, by R. T. Russell, Wireless World, May 1979, pp. 83-85.

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