Variable time inversion algorithm controlled system for multi-le

Details Variable time inversion algorithm controlled system for multi-le Variable time inversion algorithm controlled system for multi-le

1989-05-01

1990-06-26

Cangialosi, Salvatore

Cryptography

Communication system using cryptography

Variable time delay modulation

380 9, 380 36, 380 48, H04R 104

Patent

active

049378678

ABSTRACT:
A method for scrambling speech such as in a mobile land based communication system is disclosed. Essentially, variable length time samples of digitized speech are stored and time inversion scrambled. The scrambled speech is converted back to analog form and transmitted to a receiver which reciprocates the process to reproduce the desired speech signals. Scrambling and descrambling of the speech signal is synchronized to provide corresponding sample time inversions and accurate reproduction of the speech input signal. The level of security afforded by the scrambling method may be varied by varying the length of the sampling period or by mixing forward and reverse time samples under control of an algorithm.

REFERENCES:
patent: 3970791 (1976-07-01), Johnson
patent: 4221931 (1980-09-01), Seiler
patent: 4268720 (1981-03-01), Olberg et al.
patent: 4295223 (1981-10-01), Shutterly
patent: 4318125 (1982-03-01), Shutterly
patent: 4411017 (1983-10-01), Talbor
patent: 4434323 (1984-02-01), Levine et al.
patent: 4443660 (1984-04-01), DeLong
patent: 4551580 (1985-11-01), Cox et al.
patent: 4600941 (1986-07-01), Sakamoto et al.
patent: 4608456 (1986-08-01), Paik et al.
patent: 4636583 (1987-01-01), Bidell
patent: 4683586 (1987-07-01), Sakamoto

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