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METHOD AND APPARATUS FOR SIGNAL BANDWIDTH COMPRESSION UTILIZING THE FOURIER TRANSFORM OF THE LOGARITHM OF THE FREQUENCY SPECTRUM MAGNITUDE

  • US 3,681,530 A
  • Filed: 06/15/1970
  • Issued: 08/01/1972
  • Est. Priority Date: 06/15/1970
  • Status: Expired due to Term
First Claim
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1. A bandwidth compression system including an analysis section comprising:

  • means for generating electrical signals representing the Fourier transform of the logarithm of the magnitudes of the spectrum of an input signal, said input signal having excitation and impulse response information included therein;

    first detection means coupled to said means for generating electrical signals and being operative to provide from said electrical signals an output signal representing the excitation information of said input signal; and

    second detection means coupled to said means for generating electrical signals and being operative to separate out a predetermined portion of said electrical signals, said predetermined portion representing the impulse response information of said input signal.

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