| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a sound processing technique capable of reducing even noise produced at an initial stage of wind noise occurrence. <P>SOLUTION: An audio signal processing device comprises: sound collection means; storage means for storing the audio signals collected by the sound collection means; noise detection means for detecting noise included in the audio signals stored in the storage means; noise reduction means for reducing the noise detected by the noise detection means from the audio signals; and setting means for setting a time constant which controls noise reduction characteristics of the noise reduction means according to a level of the noise detected by the noise detection means. The setting means starts setting of the time constant in the noise reduction means in response to detection of the noise detected by the noise detection means. The noise reduction means reads the audio signal from the storage means and reduces the noise when the setting of the time constant by the setting means according to the noise level is completed. <P>COPYRIGHT: (C)2013,JPO&INPIT |
