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Apparatus and method for level-dependent companding for wireless audio noise reduction

  • US 6,597,301 B2
  • Filed: 10/03/2001
  • Issued: 07/22/2003
  • Est. Priority Date: 10/03/2001
  • Status: Expired due to Term
First Claim
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1. A wireless audio noise reduction system providing wireless communication between an input source and an output device, the wireless audio noise reduction system comprising:

  • an encoder comprising;

    a variable compressor, the variable compressor receiving a signal derived from the input source through an input device, the variable compressor invoking compression operation above a first input threshold, the compression operation associated with a compression ratio greater than one to one;

    a modulator connected to the variable compressor; and

    a matching network connected to the modulator, the matching network coupled to a first antenna;

    a decoder communicating with the encoder, the decoder comprising;

    a signal detector, the signal detector'"'"'s input driven from a second antenna, the second antenna being in wireless communication with the first antenna; and

    a variable expander connected to the signal detector, the variable expander invoking expanding operation above a second input threshold, the expanding operation having an expansion ratio greater than one to one.

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