METHOD AND APPARATUS FOR CALIBRATING THE SOUND SOURCE SIGNAL ACQUIRED THROUGH THE MICROPHONE ARRAY

摘要

A method and an apparatus for correcting a sound source signal are provided to prevent a distortion of a sound source signal due to characteristic mismatching between individual microphones by correcting the sound source signal according to the calculated reference probability distribution. A probability distribution calculator calculates the probability distributions expressing the number of the sound source signals existing in each interval according to the size interval of the sound source signals. A probability distribution calculator includes an accumulator. The accumulator calculates and accumulates the probability distributions about the size of the sound source signals in each interval. A reference probability distribution calculator(211) calculates the reference probability distribution representing the probability distributions based on the calculated probability distributions. A signal corrector(212) corrects the sound source signals according to the calculated reference probability distribution. The reference probability distribution calculator calculates the reference probability distribution based on the accumulated probability distributions.