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Adding Second Enhancement Layer to CELP Based Core Layer

  • US 20100070269A1
  • Filed: 09/15/2009
  • Published: 03/18/2010
  • Est. Priority Date: 09/15/2008
  • Status: Active Grant
First Claim
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1. A method of transmitting an input audio signal, the method comprising:

  • encoding a first coding error of the input audio signal with a scalable codec having a first enhancement layer;

    encoding a second coding error by using a second enhancement layer after the first enhancement layer, encoding the second coding error comprisingcoding fine spectrum coefficients of the second coding error to produce coded fine spectrum coefficients, andcoding a spectral envelope of the second coding error to produce a coded spectral envelope;

    transmitting the coded fine spectrum coefficients and the coded spectral envelope.

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