| 摘要 |
PROBLEM TO BE SOLVED: To effectively suppress noise so that a voice recognition rate can be improved in various operation states of each device of a vehicle. SOLUTION: The noise suppressing device for suppressing a voice signal which is input to a voice recognition device in order to recognize voice of a speaker in the vehicle, comprises: a microphone 1 provided in the vehicle in order to collect internal sound of the vehicle; a vehicle state detection section 3 for detecting a vehicle state which is an operation state of each device of the vehicle; a memory section 11 for storing the sound signal collected with the microphone 1 by relating it to the vehicle state when collected; a vehicle sound to vehicle state comparison memory section 13 for storing information in which the stored sound signal for each vehicle state, is averaged in a predetermined period; and a vehicle sound suppressing section 14 for suppressing the sound by subtracting the averaged information corresponding to the vehicle state when the sound signal is collected, from the sound signal collected with the microphone 1. COPYRIGHT: (C)2007,JPO&INPIT
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