Electrical audio signal processing systems and devices – Binaural and stereophonic – Broadcast or multiplex stereo
Patent
1985-05-08
1987-08-18
Isen, Forester W.
Electrical audio signal processing systems and devices
Binaural and stereophonic
Broadcast or multiplex stereo
H04H 500
Patent
active
046882553
ABSTRACT:
A system for transmitting a composite signal comprising a data transmission signal component and an AM broadcast signal component. The broadcast signal component may be monophonic or stereophonic. The level of the data signal component is made a function of the modulation level so that the data signal is masked by the program modulation and, therefore, AM radio listeners will not be disturbed by the data signal. The rate of data transmission, in one embodiment, is reduced as the level of the data signal is reduced. The data signal is in quadrature with the AM carrier so as to minimize detection of the data signal by an envelope demodulator. Suitable data receivers are also disclosed.
REFERENCES:
patent: 2666133 (1954-01-01), Kahn
patent: 3218393 (1965-11-01), Kahn
patent: 3341833 (1967-09-01), Jones
patent: 3908090 (1975-09-01), Kahn
patent: 3943293 (1976-03-01), Bailey
patent: 4194154 (1980-03-01), Kahn
patent: 4238849 (1980-12-01), Gassemann
patent: 4373115 (1983-02-01), Kahn
patent: 4379947 (1983-04-01), Warner
patent: 4388493 (1983-06-01), Maisel
Kahn, "Comparison of Linear Single-Sideband Transmitters with Envelope Elimination and Restoration Single-Sideband Transmitters", Proc. IRE vol. 44, pp. 1706-1712, Dec. 1956.
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