Title:
非目的音判定装置、プログラム及び方法
Document Type and Number:
Japanese Patent JP6763319
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a non-target sound determination device capable of determining the presence or absence of a non-target sound (e.g. background noise) with good accuracy.SOLUTION: A non-target sound determination device of the present invention, comprises: a front suppression signal generation unit which acquires frequency domain input signals resulting from conversion of input signals obtained from a plurality of microphones from a time domain to a frequency domain, and generates first front suppression signals with a blind spot in front thereof based on a difference of the acquired frequency domain input signals for each microphone; a coherence calculating unit which calculates a coherence from the input signals obtained from the plurality of microphones; a first feature quantity calculating unit which calculates a correlation coefficient of the first front suppression signal and the coherence, and a first feature quantity value indicative of the degree of positive and negative fluctuations of the inclination of the amplitude of the correlation coefficient; and a presence-of-background noise determination unit which determines the presence or absence of background noise based on the first feature quantity value calculated by the first feature quantity calculating unit.SELECTED DRAWING: Figure 1
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Inventors:
Katsuyuki Takahashi
Application Number:
JP2017035286A
Publication Date:
September 30, 2020
Filing Date:
February 27, 2017
Export Citation:
Assignee:
Oki Electric Industry Co., Ltd.
International Classes:
H04R3/00; G10L21/0232; G10L21/0264
Domestic Patent References:
| JP2017040752A | ||||
| JP2013126026A | ||||
| JP2016042613A |
Foreign References:
| US20140241546 |
Attorney, Agent or Firm:
Yoshida Rintaro
Yusuke Wakabayashi
Yusuke Wakabayashi