Method and apparatus for canceling noise from sound input...

Details Method and apparatus for canceling noise from sound input... Method and apparatus for canceling noise from sound input...

2008-03-14

2011-12-27

Pizarro, Marcos D. (Department: 2814)

Electrical audio signal processing systems and devices

Noise or distortion suppression

C381S071100

Reexamination Certificate

active

08085949

ABSTRACT:
Provided is a method and apparatus for canceling noise from a sound signal input through a microphone. The method includes filtering a high-frequency signal having a frequency that is higher than a reference frequency and a low-frequency signal having a frequency that is lower than the reference frequency from input signals obtained through a microphone array, obtaining a high-frequency target signal by canceling a noise signal from the filtered high-frequency signal using a beamforming method, obtaining a low-frequency target signal by canceling a noise signal having a phase difference that is different from a phase difference of a target signal from the filtered low-frequency signal, and obtaining a sound source signal from which noise is cancelled, by synthesizing the obtained high-frequency target signal with the obtained low-frequency target signal. Thus, it is possible to accurately obtain a target sound source signal by minimizing signal distortion occurring in a low-frequency band in a digital sound obtaining apparatus having a small-size microphone array and accurately canceling or attenuating unnecessary noise.

REFERENCES:
patent: 2008/0212811 (2008-09-01), Kates
patent: 2010/0027820 (2010-02-01), Kates

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