Signal processing device, signal processing method and signal processing program
AssigneeNEC Corporation
InventorAkihiko Sugiyama
Life of this patent
Estimating the term…
Abstract
The purpose of the present invention is to achieve a high-quality signal processing performance. A signal processing device provided with a suppression unit for suppressing a second signal by processing a mixed signal in which a first signal and the second signal are present. The signal processing device is provided with an analysis unit for analyzing, per frequency component, the importance of the first signal contained in the mixed signal, and an inhibition unit for inhibiting the suppression of the second signal of a frequency component having a high importance over a frequency component having a low importance on the basis of the analysis result of the analysis means.
Claims12
A signal processing device comprising:
- a circuitry configured to:
- decompose a mixed signal containing a first signal and a second signal into multiple frequency components for performing following processing in a frequency domain;
- suppress the second signal;
- determine a separate importance degree of the first signal for each of the frequency components based on magnitude information alone from a viewpoint of how much degree the frequency component is likely to be perceived;
- and
- based on the determined importance degrees of the first signal, reduce a degree of the suppression of the second signal for each of the frequency components according to the determined importance degrees of the first signal.
A signal processing method comprising:
- by a circuitry,
- decomposing a mixed signal containing a first signal and a second signal into multiple frequency components for performing following processing in a frequency domain;
- determine a separate importance degree of the first signal for each of the frequency components based on magnitude information alone from a viewpoint of how much degree the frequency component is likely to be perceived;
- and
- when suppressing the second signal for each of the frequency components, reducing, based on the determined importance degrees of the first signal, a degree of the suppression of the second signal according to the determined importance degrees of the first signal.
A computer readable non-transitory medium for storing a signal processing program operable on a computer which function as a signal processing device, the signal processing program causes the computer to execute:
- a frequency decomposition processing of decomposing a mixed signal containing a first signal and a second signal into multiple frequency components for performing following processing in a frequency domain;
- a suppression processing of suppressing the second signal by processing the mixed signal;
- an analysis processing of determining a separate importance degree of the first signal for each of the frequency components based on magnitude information alone from a viewpoint of how much degree the frequency component is likely to be perceived;
- and
- a processing of reducing, based on the determined importance degrees of the first signal, the suppression of the second signal for each of the frequency components according to the determined importance degrees of the first signal.
Dependencies are inferred from the claim text.