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Speech signal processing system, speech signal processing method and speech signal processing method program using noise environment and volume of an input speech signal at a time point

  • US 8,793,128 B2
  • Filed: 02/03/2012
  • Issued: 07/29/2014
  • Est. Priority Date: 02/04/2011
  • Status: Active Grant
First Claim
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1. A speech signal processing system comprising:

  • an input speech storage that stores an input speech signal;

    a characteristic estimation unit that refers to the input speech signal stored in the input speech storage, and estimates characteristics of the input speech, the characteristics including an environmental sound included in the input speech signal, and the SN estimation unit obtains powers of the non-speech portion of the speech and a speech portion of the inputted speech signal and estimates an SN ratio;

    a reference speech output that causes a predetermined speech signal that becomes a reference speech to be output;

    a volume adjustment unit that adjusts the volume of the reference speech according to the SN ratio;

    a characteristic adding unit that adds the estimated characteristics of the input speech, to the output reference speech signal of volume adjustment unit.

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