Auxiliary signal processing circuit

Details Auxiliary signal processing circuit Auxiliary signal processing circuit

1975-09-02

1977-09-06

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

325466, 340171A, H04N 544

Patent

active

040472272

ABSTRACT:
A television receiver includes a provision for processing auxiliary signals in addition to the conventional information signals. The auxiliary signals comprise various combinations of N signals out of a total of M possible signals, where N and M are positive integers greater than 1, and N is less than M. The auxiliary signals preferably are audio signals outside the normal audible range, and the decoding of unique combinations of these signals at a receiver is used to provide channel number identification when the signals are transmitted from transmitting stations. In addition, the auxiliary signals transmitted from a transmitting station are used to control signal-seek tuning, direct channel access, or channel display. Also, unique combinations of N out of M possible signals are used in a remote control system to provide output signals indicative of different functions to be performed by the television receiver.

REFERENCES:
patent: 3378817 (1968-04-01), Vitt
patent: 3452156 (1969-06-01), Engelbrecht
patent: 3530434 (1970-09-01), Stites et al.
patent: 3702440 (1972-11-01), Moore
patent: 3758864 (1973-09-01), Kanamaru
patent: 3812285 (1974-05-01), Miyata et al.
patent: 3939465 (1976-02-01), Helton et al.

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