Patent ID: 6961431

Claim:
An analog privacy scrambling system comprising: a transmitter comprising: a band subdivision circuit for receiving an analog input signal that is to be scrambled that frequency segments the analog signal; a coding circuit that combines the frequency segments; a phase modulation circuit for randomly transforming the combined frequency segments to produce a scrambled phase modulated signal; and a transmit circuit for transmitting the scrambled phase modulated signal; and a receiver comprising: a band selection circuit that receives and segments the transmitted scrambled phase modulated signal; phase demodulation circuit that has phase modulation synchronized with the phase modulation imposed at the transmitter to shift the segmented signal to baseband and remove the phase modulation; an inverse coding circuit that recovers the original baseband frequency segments from the segmented signal; and a signal composition circuit that remodulates the original baseband segments to their original frequencies and adds the segments to reproduce the original signal.