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Audio scrambling system using in-band carrier

  • US 5,159,631 A
  • Filed: 04/26/1990
  • Issued: 10/27/1992
  • Est. Priority Date: 04/26/1990
  • Status: Expired due to Term
First Claim
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1. A method of scrambling audio information signals having frequency components lying within an original frequency spectral range of about 50 Hz to about 15 kHz, said method comprising the steps of:

  • (a) generating a modulation carrier signal at a frequency lying within the original frequency spectral range, and(b) single side band modulating the original audio information signals with the modulation carrier signal from step (a) to translate the frequency of said original audio information signals in a given direction, the resulting signals having a frequency greater than the frequency of the carrier signal.

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