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Method and apparatus for encoding/decoding speech signal

  • US 20100114566A1
  • Filed: 07/28/2009
  • Published: 05/06/2010
  • Est. Priority Date: 10/31/2008
  • Status: Active Grant
First Claim
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1. An apparatus for encoding a speech signal, the apparatus comprising:

  • a linear predictive (LP) analysis unit/quantization unit to determine an immittance spectral frequencies (ISF) index;

    a closed loop pitch search unit to determine a pitch index;

    a fixed codebook search unit to determine a code index;

    a gain vector quantization (VQ) unit to determine a gain VQ index of each of an adaptive codebook and a fixed codebook; and

    a bit rate control unit to control at least two indexes of the ISF index, the pitch index, the code index, and the gain VQ index to be encoded to be variable bit rates based on a source feature of a speech signal and reserved bits.

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