SIGNAL PROCESSING DEVICE AND SIGNAL PROCESSING METHOD
First Claim
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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Abstract
A signal processing device includes: a filter processing unit configured to execute noise reduction operations by subjecting sound-collected signals from a sound-collecting unit to filtering processing based on preset filter properties and providing with signal properties for noise reduction; a noise-unreduced signal obtaining unit configured to obtain noise-unreduced signals obtained in a state where noise reduction operations by the filter processing unit are stopped; and a filter property selecting unit configured to obtain a difference between the noise-unreduced signals and noise-reduced signals obtained at the time of executing noise reduction operations with preset filter properties set to the filter processing unit as a candidate filter property, thereby obtaining a noise reduction effect indicator regarding the candidate filter property, and selecting filter properties to be set to the filter processing unit based on the noise reduction effect indicator.
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Citations
15 Claims
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1. A signal processing device comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A signal processing method comprising steps of:
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obtaining noise-unreduced signals in a state where noise reduction operations by filter processing means, which execute the 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, are stopped; and obtaining 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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14. A signal processing device comprising:
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a filter processing unit configured to execute noise reduction operations by subjecting sound-collected signals from a sound-collecting unit to filtering processing based on preset filter properties and providing with signal properties for noise reduction; a noise-unreduced signal obtaining unit configured to obtain noise-unreduced signals obtained in a state where noise reduction operations by said filter processing unit are stopped; and a filter property selecting unit 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 unit 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 unit based on said noise reduction effect indicator.
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15. A signal processing method comprising the steps of:
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obtaining noise-unreduced signals in a state where noise reduction operations by a filter processing unit, which executes the noise reduction operations by subjecting sound-collected signals from a sound-collecting unit to filtering processing based on preset filter properties and providing with signal properties for noise reduction, are stopped; and obtaining a difference between said noise-unreduced signals and noise-reduced signals obtained at a time of executing the noise reduction operations with the preset filter properties set to said filter processing unit 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 unit based on said noise reduction effect indicator.
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Specification