| 摘要 |
PURPOSE: A sound source estimating device and a method thereof are provided to exactly draw a difference of arrival time of the sound received from a sound receiving unit and a direction angle of the sound source. CONSTITUTION: A sound source estimating device(100) comprises a bier coefficient of correlation generating unit(110), a bier coefficient of correlation correction unit(120), a bier coefficient of correlation filtering unit(130), a delay time output unit(140), a sound source direction output unit(150), a sound source direction filtering unit(160), and a sound source summation direction output unit(170). The bier coefficient of correlation generating unit generates the bier coefficient of correlation of a first sound signal received from a first sound receiving unit and a second sound signal received from a second sound receiving unit, from a plurality of sound receiving units. The bier coefficient of correlation correction unit adds the delay time in front and back of the first sound signal and the second sound signal to correct the bier coefficient of correlation. The bier coefficient of correlation filtering unit filters the corrected bier correlation function to remove an external noise. The delay time output unit calculates the delay time from the first sound receiving unit and the second sound receiving unit to the sound source based on the filtered bier coefficient of correlation. The sound source direction output unit calculates the direction information from a sound receiving center to the sound source based on the delay time. [Reference numerals] (110) Bier coefficient of correlation generating unit; (120) Bier coefficient of correlation correction unit; (130) Bier coefficient of correlation filtering unit; (140) Delay time output unit; (150) Sound source direction output unit; (160) Sound source direction filtering unit; (170) Sound source summation direction output unit
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