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System and method for shaping a data signal for embedding within an audio signal

  • US 7,460,991 B2
  • Filed: 11/30/2001
  • Issued: 12/02/2008
  • Est. Priority Date: 11/30/2000
  • Status: Expired due to Term
First Claim
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1. An apparatus for shaping a data signal for embedding within an audio signal, the apparatus comprising:

  • a first receiver operable to receive the data signal;

    a second receiver operable to receive the audio signal;

    a time series modeler operable to apply a time series model to the audio signal in order to generate a plurality of coefficients indicative of the audio signal;

    a synthesizer operable to synthesize a time domain tonal signal using the generated coefficients;

    a subtractor operable to difference the synthesized tonal signal and the audio signal to generate a time domain residual signal; and

    a shaper operable to shape the spectrum of the data signal in dependence upon the residual signal to form a shaped data signal.

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