Secret speech equipment

Details Secret speech equipment Secret speech equipment

H - Electricity

04

K

379/1

H04K 1/04 (2006.01)

Patent

CA 1288182

SECRET SPEECH EQUIPMENT ABSTRACT OF THE DISCLOSURE Disclosed is a secret speech equipment for ensuring the secrecy of an analog voice signal, and used in voice communication systems such as an analog telephone and mobile radio. The equipment comprises a sub-band signal generating unit for treating input digital samples as frequency-multiplexed signals of voice spectra, to split the frequency-multiplexed signals into a plurality of frequency bands, and thus obtain sub-band signals of the frequency bands, a sub-band signal permutating unit for permuting the sequence of the sub-band signals, and a sub-band signal multiplexing unit for multiplexing the permutated sub-band signals.

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