Digital voice privacy apparatus and method

Details Digital voice privacy apparatus and method Digital voice privacy apparatus and method

H - Electricity

04

M

H04M 1/68 (2006.01) H04K 1/00 (2006.01) H04K 1/04 (2006.01) H04Q 7/22 (2006.01)

Patent

CA 2154410

A cellular voice privacy arrangement includes a digital privacy unit which is part of each subscriber's fixed equipment. The digital privacy unit includes suitable analog to digital and digital to analog converters. A vocoder, digital signal processor and modem provide the privacy. The identification numbers of each terminal (phone) are exclusive-ORed to form a scramble variable. Vocoder data (voice coded information) is exclusive-ORed with the scramble variable to provided scrambled data for transmission.

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