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SPEECH PROCESSING APPARATUS, CONTROL METHOD THEREOF, STORAGE MEDIUM STORING CONTROL PROGRAM THEREOF, AND VEHICLE, INFORMATION PROCESSING APPARATUS, AND INFORMATION PROCESSING SYSTEM INCLUDING THE SPEECH PROCESSING APPARATUS

  • US 20130297303A1
  • Filed: 12/03/2011
  • Published: 11/07/2013
  • Est. Priority Date: 01/13/2011
  • Status: Active Grant
First Claim
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1. A speech processing apparatus comprising:

  • a first microphone that inputs a first mixture sound including desired speech and noise, and outputs a first mixture signal;

    a second microphone that is opened to the same sound space as that of said first microphone and disposed at a focus position of an interface that is part of a boundary of the sound space and has one of a quadratic surface shape and a pseudo surface shape approximating a quadratic surface, inputs a second mixture sound including the desired speech reflected by the interface and the noise reflected by the interface at a ratio different from the first mixture sound, and outputs a second mixture signal; and

    a noise suppression circuit that suppresses an estimated noise signal based on the first mixture signal and the second mixture signal, and outputs a pseudo speech signal.

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