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Method for coding speech and music signals

  • US 20030004711A1
  • Filed: 06/26/2001
  • Published: 01/02/2003
  • Est. Priority Date: 06/26/2001
  • Status: Active Grant
First Claim
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1. A method for decoding a portion of a coded signal, the portion comprising a coded speech signal or a coded music signal, the method comprising the steps of:

  • determining whether the portion of the coded signal corresponds to a coded speech signal or to a coded music signal;

    providing the portion of the coded signal to a speech excitation generator if it is determined that the portion of the coded signal corresponds to a coded speech signal, wherein an excitation signal is generated in keeping with a linear predictive procedure;

    providing the portion of the coded signal to a transform excitation generator if it is determined that the portion of the coded signal corresponds to a coded music signal, wherein an excitation signal is generated in keeping with a transform coding procedure;

    switching the input of a common linear predictive synthesis filter between the output of the speech excitation generator and the output of the transform excitation generator, whereby the common linear predictive synthesis filter provides as output a reconstructed signal corresponding to the input excitation.

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