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Method, apparatus and recording medium for coding of separated tone and noise characteristic spectral components of an acoustic sibnal

  • US 5,717,821 A
  • Filed: 03/20/1995
  • Issued: 02/10/1998
  • Est. Priority Date: 05/31/1993
  • Status: Expired due to Term
First Claim
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1. A method of encoding an input acoustic signal, comprising the steps of:

  • transforming the input acoustic signal into a block of frequency components, each frequency component characterized by an energy distribution;

    separating the frequency components into a first signal consisting of tone characteristic components, each tone characteristic component having a sharp energy distribution relative to energy distributions of frequency components in a local neighborhood of the tone characteristic component and to energy distributions of frequency components in the block, and a second signal consisting of components other than the tone characteristic components;

    encoding the first signal; and

    encoding a signal based on the second signal.

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