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SIGNAL PROCESSING DEVICE AND SIGNAL PROCESSING METHOD

  • US 20090279709A1
  • Filed: 04/29/2009
  • Published: 11/12/2009
  • Est. Priority Date: 05/08/2008
  • Status: Active Grant
First Claim
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1. A signal processing device comprising:

  • filter processing means configured to execute noise reduction operations by subjecting sound-collected signals from sound-collecting means to filtering processing based on preset filter properties and providing with signal properties for noise reduction;

    noise-unreduced signal obtaining means configured to obtain noise-unreduced signals obtained in a state where noise reduction operations by said filter processing means are stopped; and

    filter property selecting means configured to obtain a difference between said noise-unreduced signals and noise-reduced signals obtained at a time of executing noise reduction operations with the preset filter properties set to said filter processing means as a candidate filter property, thereby obtaining a noise reduction effect indicator regarding said candidate filter property, and selecting filter properties to be set to said filter processing means based on said noise reduction effect indicator.

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