Helium speech unscrambler with pitch synchronization

Details Helium speech unscrambler with pitch synchronization Helium speech unscrambler with pitch synchronization

1974-09-09

1976-04-13

Claffy, Kathleen H.

179 1555T, H04J 318

Patent

active

039506177

ABSTRACT:
A pitch synchronized helium speech unscrambler is disclosed as including a air of bucket brigade analog delay lines which are timely and rapidly loaded with the electrical signal equivalents of human voice signals that are effectively supplied thereto by a receiving transducer. Said voice signal equivalents are then respectively unloaded more slowly from said pair of bucket brigade delay lines than they were loaded therein by a pair of different frequency clock generators driven in alternate successions by preprogrammed signals divided out from a master oscillator and in synchronism with a predetermined pitch portion of the speech signal received by said receiving transducer. The unloaded signals are then broadcast as acoustical voice signals by a transmitting transducer.

REFERENCES:
patent: 3632877 (1969-04-01), Gray
patent: 3681756 (1972-08-01), Burkhard et al.
patent: 3855424 (1974-12-01), Tharmaratnam et al.

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