Title:
NOISE ELIMINATION DEVICE AND METHOD
Document Type and Number:
WIPO Patent Application WO/2023/181144
Kind Code:
A1
Abstract:
Provided is a noise elimination device capable of responding to a change in noise over time using a single acoustic sensor. The present invention comprises a Fourier transform unit for dividing a single input signal including a component other than a target signal into frames delimited by a fixed time to convert the input signal to a frequency spectrum, and using a delay amount to generate a plurality of pairs of frequency spectra having a fixed time difference, a cross spectrum unit for generating a plurality of cross spectra or coherences from the plurality of pairs of frequency spectra having a fixed time difference, and a noise elimination unit for averaging the plurality of cross spectra or plurality of coherences and extracting a power spectrum of the target signal.
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Inventors:
TANAKA NOBUAKI (JP)
Application Number:
PCT/JP2022/013363
Publication Date:
September 28, 2023
Filing Date:
March 23, 2022
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
G10L21/0208; G10L21/0232; G10L21/0264
Domestic Patent References:
| WO2018131099A1 | 2018-07-19 |
Foreign References:
| JP2011033717A | 2011-02-17 |
Attorney, Agent or Firm:
MURAKAMI, Kanako et al. (JP)
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