Secure voice transmission

Details Secure voice transmission Secure voice transmission

H - Electricity

04

K

379/1

H04K 1/00 (2006.01)

Patent

CA 1225758

- 13 - SECURE VOICE TRANSMISSION Abstract Voice signals are transmitted over a voiceband telephone channel with a high degree of security and good voice quality by applying to the transmission channel a first signal which includes digital information derived from the vocal tract response of the signal and a second signal which includes continuous information derived from the excitation component of the voice signal.

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