Speech scrambler

Details Speech scrambler Speech scrambler

1976-01-02

1978-07-04

Birmiel, Howard A.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

179 1J, 179 15R, 307293, H04K 100

Patent

active

040990273

ABSTRACT:
A speech scrambler for rendering unintelligible a communications signal for transmission over nonsecure communications channels includes a time delay modulator and a coding signal generator in a scrambling portion of the system and a similar time delay modulator and a coding generator for generating an inverse signal in the unscrambling portion of the system.

REFERENCES:
patent: 2987614 (1961-06-01), Roberts et al.
patent: 3402355 (1968-09-01), Hannan et al.
patent: 3502994 (1970-03-01), Ott et al.
patent: 3723878 (1973-03-01), Miller
patent: 3731197 (1973-05-01), Clark
patent: 3749837 (1973-07-01), Doughty
patent: 3773977 (1973-11-01), Guanella
patent: 3846827 (1974-11-01), Eppler, Jr.
patent: 3878472 (1976-04-01), Osakabe
patent: 3920905 (1975-11-01), Sharp
patent: 3949174 (1976-04-01), Sutton
patent: 3959597 (1976-05-01), Keiser
patent: 3975763 (1976-08-01), Kitamura

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