Teletext magazine code detector

Details Teletext magazine code detector Teletext magazine code detector

1983-10-18

1986-06-03

Atkinson, Charles E.

Boots, shoes, and leggings

371 37, G06F 1110, G06F 1540

Patent

active

045933740

ABSTRACT:
In a teletext decoder, a magazine code detector detects a sought after magazine number in an error-encoded teletext signal. A memory stores all allowable magazine code numbers in error-encoded form. A keyboard or remote control enters into a microprocessor, in uncoded form, the sought after magazine number. The microprocessor addresses the memory location where the corresponding error-encoded magazine number is stored to develop at the output of the memory those encoded bytes of data that represent the sought after magazine number. The encoded bytes are compared to the bytes of incoming data in the teletext signal to determine the presence of the sought after magazine number in the teletext transmission.

REFERENCES:
patent: 4075460 (1978-02-01), Gorgens
patent: 4091441 (1978-05-01), Clausing
patent: 4141078 (1979-02-01), Bridges, Jr. et al.
patent: 4390968 (1983-06-01), Hennessy et al.
"Wireless World Teletext Decoder", part 1-8, published in Wireless World, Nov. 75-Jun. 76.
Article by P. Frandon & G. Chauvel entitled "Antiope LSI", published in IEEE Transactions on Consumer Electronics, vol. C-25, No. 3, Jul. 1979, pp. 334-338.

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