Voice encryption system

Details Voice encryption system Voice encryption system

1979-03-16

1980-11-04

Morrison, Malcolm A.

179 1SA, H04K 106

Patent

active

042321948

ABSTRACT:
An apparatus and method of voice encryption uses segment swapping. Features of the invention include weighting the input time-function segments by a Hamming or Hanning Window function, before converting to frequency domain segments.

REFERENCES:
patent: 3773977 (1973-11-01), Guanella
patent: 4100374 (1978-07-01), Jayant et al.
patent: 4149035 (1979-04-01), Frutiger
E. Brunner, "Efficient Speech Scrabling", Conference Record: International Conf. on Communications etc., England, Jun. 1976, pp. 336-339.
D. Kahn, "The Codebreakers," Weidenfeld-Nicolson.

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