Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1977-09-06
1978-09-19
Griffin, Robert L.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
179 15R, 358 86, 358114, 358115, 358117, 325308, 340149A, H04M 132, H04M 134, H04M 144
Patent
active
041156625
ABSTRACT:
There is provided a one-way data transmission system wherein a transmitter station transmits in the form of data packs data from a plurality of channels, the said packs being time multiplexed.
One channel amongst the plurality of channels is allotted to transmitting date information. In the receiver equipments, the dead memory stores not only the channel code, but also a subscription period information which permits to validate the channel code depending on the date information received from the date channel. Automatic dead-memory distributors are provided which receive data from a control channel transmitted by the system, like other channels. The system is compatible with television systems.
REFERENCES:
patent: 2977434 (1961-03-01), Shanahan
patent: 3736368 (1973-05-01), Vogelman
patent: 3736369 (1973-05-01), Vogelman
patent: 3890461 (1978-06-01), Vogelman
Guinet Yves Maurice
Noirel Yves Maurice
Coles Edward L.
Etablissement Public Dit Telediffusion de France
Griffin Robert L.
L'Etat Francais, Represente par le Secretaire d'Etat aux Postes
Laff Charles A.
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