Method for the fast synchronization of vocoders coupled to one a

Details Method for the fast synchronization of vocoders coupled to one a Method for the fast synchronization of vocoders coupled to one a

1988-08-12

1990-10-16

Tarcza, Thomas H.

Cryptography

Key management

Having particular key generator

375115, 370 29, H04L 900

Patent

active

049641654

ABSTRACT:
A method for the fast synchronization of vocoders, coupled to each other by means of enciphering and deciphering devices, consists in synchronizing the data frames transmitted by the vocoders with the end of the sequence for synchronizing the enciphering and deciphering devices, in transmitting the decryption data for a period equal to a whole multiple of the duration of a digital frame of speech data transmitted and in synchronizing the called vocoder with the end of transmission of the decryption data. Thus, a gain is obtained in the synchronization acquisition time.

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patent: 4172963 (1979-10-01), Belcher et al.
patent: 4182933 (1980-01-01), Rosenblum
patent: 4208544 (1980-06-01), Burke, Jr.
patent: 4392241 (1983-07-01), Hurst
patent: 4661657 (1987-04-01), Grenzebach et al.
patent: 4817146 (1989-03-01), Szczutkowski
IEEE Global Telecommunications conference, Co-munications Broadening Technology Horizons, Conference Record, vol. 2, Houston, Tex., 1-4 Dec. 1986, pp. 813-817.
IEEE Communications Society etc., New York, U.S.; A. Taha et al.: "Speech encrytion in Linear predictive coding (LPC) System" *p. 813, "colonne de droite, dernier linea-p. 814, colonne de gauech, ligne 17; colonne de droite, dernier linea".
Conference Proceedings of Military Microwaves '84, 24-26 oct. 1984, Londres, pp. 50-54, Microwave Exhibitions and Publishers Ltd, Tunbridge Wells, Kent, GB; G. J. Proudler: "Bulk encryption for wideband applications" *p. 51, dernier alinea-p. 52, ligne 26*.

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