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SPEECH RECEIVING APPARATUS, AND SPEECH RECEIVING METHOD

  • US 20130262122A1
  • Filed: 03/27/2013
  • Published: 10/03/2013
  • Est. Priority Date: 03/27/2012
  • Status: Active Grant
First Claim
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1. A speech receiving apparatus comprising:

  • a low-band PLC module and a synthesis filter reconstructing a low-band speech signal of a lost frame from a previous good frame;

    a high-band PLC module reconstructing a high-band speech signal of the lost frame from the previous good frame;

    a transforming part transforming the low-band speech signal to a frequency domain;

    a bandwidth extending part generating at least an extended MDCT coefficient as information for the high-band speech signal from the low-band speech signal transformed by the transforming part;

    a smoothing part smoothing the extended MDCT coefficient;

    an inverse transforming part inversely transforming the extended MDCT coefficient smoothed by the smoothing part to a time domain; and

    a synthesizing part synthesizing the low-band speech signal, and the high-band speech signal which is inverse-transformed by the inverse transforming part and reconstructed, to output a wideband speech signal.

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