NOISE CANCELLING METHOD AND APPARATUS FROM THE SOUND SIGNAL THROUGH THE MICROPHONE

摘要

A method and a device for removing noise from a sound signal inputted through a microphone are provided to minimize signal distortion generated in a low frequency band in a digital sound obtaining device, which is equipped with a small microphone array. A filter unit(210) filters a high frequency signal higher than a reference frequency and a lower frequency signal lower than the reference frequency from input signals obtained through a microphone array. A target high frequency signal generator(221) obtains a target high frequency signal by removing noise from the filtered high frequency signal. A target low frequency signal generator(222) obtains a target low frequency signal by removing the noise, which has a phase difference from a target signal, from the filtered low frequency signal. A signal composer(230) obtains a sound signal excluding the noise by composing the target high and low frequency signal.