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Sound processing device, sound processing method, and program

  • US 9,485,572 B2
  • Filed: 03/06/2014
  • Issued: 11/01/2016
  • Est. Priority Date: 10/14/2011
  • Status: Active Grant
First Claim
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1. A sound processing device comprising:

  • a hardware controller;

    a memory storing a program that, when executed by the hardware controller, causes the sound processing device to;

    calculate a suppression gain of noise by using respective input signals input from a plurality of microphones;

    obtain an integration gain by using a suppression gain of an acoustic echo and the suppression gain of the noise;

    apply the integration gain to one input signal among the plurality of input signals;

    estimate a spectrum of components of the acoustic echo by using said one input signal to which the integration gain is applied, an output signal that is output to a replay device, and said one input signal before having the integration gain applied thereto; and

    calculate the suppression gain of the acoustic echo by comparing the estimated spectrum of the components of the acoustic echo and a spectrum of said one input signal before having the integration gain applied thereto;

    a baseband unit configured to modulate said one input signal to which the integration gain is applied into a transmission signal;

    a radio unit configured to convert the transmission signal to a radio signal; and

    an antenna configured to transmit the radio signal.

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