US Patent No. 9,462,174

ELECTRONIC DEVICE AND CONTROL METHOD


Patent No. 9,462,174
Issue Date October 04, 2016
Title Electronic Device And Control Method
Inventorship Yuki Tsujimoto, Tokyo (JP)
Keita Sonoda, Yokohama (JP)
Assignee Canon Kabushiki Kaisha, Tokyo (JP)

Claim of US Patent No. 9,462,174

1. An electronic device comprising:
a first microphone unit;
a second microphone unit;
an input unit that inputs a drive instruction to drive a drive unit;
a first transforming unit that acquires a first audio spectrum by performing Fourier transform on audio data obtained by the
first microphone unit;

a second transforming unit that acquires a second audio spectrum by performing Fourier transform on audio data obtained by
the second microphone unit;

a first subtracting unit that subtracts a first noise spectrum from the first audio spectrum so as to reduce noise in audio
data obtained by the first microphone unit if the drive instruction is input, wherein the first noise spectrum is generated
after the drive instruction is input, using the audio data obtained by the first microphone unit;

a second subtracting unit that subtracts a second noise spectrum from the second audio spectrum so as to reduce noise in audio
data obtained by the second microphone unit if the drive instruction is input, wherein the second noise spectrum is generated
after the drive instruction is input, using the audio data obtained by the second microphone unit;

a control unit that selects one of a third audio spectrum and a fourth audio spectrum in accordance with a result of comparison
between the third audio spectrum and the fourth audio spectrum, wherein the third audio spectrum is acquired by subtracting
the first noise spectrum from the first audio spectrum, and the fourth audio spectrum is acquired by subtracting the second
noise spectrum from the second audio spectrum;

a third transforming unit that acquires first audio data by performing inverse Fourier transform on the audio spectrum selected
from among the third audio spectrum and the fourth audio spectrum;

a fourth transforming unit that acquires second audio data by performing inverse Fourier transform on the audio spectrum selected
from among the third audio spectrum and the fourth audio spectrum; and

a storing unit that stores the first audio data and the second audio data.