| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a signal processing device by which a user always hear music, etc., in a good acoustic environment. <P>SOLUTION: The signal processing device is provided with: a noise analysis unit which analyzes a frequency component of a noise signal; a plurality of filtering units which perform predetermined filtering operations for the noise signal based on the result of analysis; and an output control unit which temporally varies a synthesis rate of the outputs of the plurality of filtering units in accordance with a change in the result of analysis by the noise analysis unit. When the result of analysis by the noise analysis unit changes, one of the filtering units begins a predetermined filtering operation in accordance with characteristics different from those of other filtering units which are performing predetermined filtering operations for the noise signal, and the output control unit temporally varies the synthesis rate of the outputs of the other filtering units and the one filtering unit, in accordance with a change in the result of analysis by the noise analysis unit, and switches the output from the other filtering units to the one filtering unit. <P>COPYRIGHT: (C)2011,JPO&INPIT |
