Analog voice privacy device for a secure communications system

Details Analog voice privacy device for a secure communications system Analog voice privacy device for a secure communications system

H - Electricity

04

K

379/1, 325/3

H04K 1/06 (2006.01)

Patent

CA 1188739

TITLE ANALOG VOICE PRIVACY DEVICE FOR A SECURE COMMUNICATIONS SYSTEM INVENTOR Brian Bryden ABSTRACT OF THE DISCLOSURE The voice privacy device divides the voice waveform into equal segments and transmits the segments in an unnatural order. In order to synchronize the terminals and unscramble the transmitted segments, the transmitter also sends a binary random sequence which it has generated in a register and which is duplicated in the receivers once initiated by the received sequence. A day code determines the ports of the register that are to be connected to a key generator which generates key numbers for controlling the order in which segments are to be transmitted. Synchronization of the receivers can occur at any point in the transmission, allowing the voice privacy device to be used under adverse conditions on mobile radio systems, as well as the dial- up telephone network.

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