| 摘要 |
PROBLEM TO BE SOLVED: To cope with the variance in pitch frequency by easy processing by accurately estimating an arrival time difference of direct sounds regardless of an effect of reflected sounds to improve the precision of speaker direction detection. SOLUTION: A signal processor 5 includes; a sound source direction detection part 6 which detects voice components of a direction of a speaker 4 in all directions from voice components of the direction of the speaker in respective axial directions of a microphone unit 1 wherein microphone arrays 2 and 3 having a plurality of microphones provided like arrays are arranged on axes in at least two directions; and a voice detection part 7 which detects an arrival direction of voice on the basis of voice components of the direction of the speaker in all detections, which are detected by the sound source direction detection part 6. COPYRIGHT: (C)2007,JPO&INPIT
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