Title:
SIGNAL PROCESSING APPARATUS, CONTROL CIRCUIT, STORAGE MEDIUM, AND SIGNAL PROCESSING METHOD
Document Type and Number:
WIPO Patent Application WO/2022/185452
Kind Code:
A1
Abstract:
This signal processing apparatus (1) comprises: a window function unit (11) for performing window function processing on a Fourier transform frame cut out from time-series signal data; a Fourier transform unit (12) for transforming, into frequency domain information, the Fourier transform frame subjected to the window function processing; a color space transform unit (13) for generating spectrogram data defined to correspond to a two-dimensional plane of time and frequency, the spectrogram data being generated by performing a transform that transforms the phase angle of a complex amplitude in the frequency domain into a hue through mapping, and matches the absolute value of the complex amplitude to the brightness; and a deep learning processing unit (14) that detects or identifies a signal through convolution processing and total connection processing of the spectrogram data.
Inventors:
AKIYAMA YUJI (JP)
Application Number:
PCT/JP2021/008198
Publication Date:
September 09, 2022
Filing Date:
March 03, 2021
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
G01J3/46; G01N21/27; G06F17/10; G06N3/04
Foreign References:
| JP2020149560A | 2020-09-17 | |||
| JP2009529723A | 2009-08-20 | |||
| US20200146129A1 | 2020-05-07 | |||
| US10185881B2 | 2019-01-22 |
Other References:
YATABE KOHEI, MASUYAMA YOSHIKI, KUSANO TSUBASA, OIKAWA YASUHIRO: "Representation of complex spectrogram via phase conversion", ACOUSTICAL SCIENCE AND TECHNOLOGY, ACOUSTICAL SOCIETY OF JAPAN, TOKYO, JP, vol. 40, no. 3, 1 May 2019 (2019-05-01), JP , pages 170 - 177, XP055967174, ISSN: 1346-3969, DOI: 10.1250/ast.40.170
AUNSRI, N: "Effect of Window Functions on the Sequential Bayesian Filtering Based Frequency Estimation", THE 21ST INTERNATIONAL SYMPOSIUM ON WIRELESS PERSONAL MULTIMEDIA COMMUNICATIONS(WPMC- 2018, 2018, pages 411 - 415, XP033549174, DOI: 10.1109/WPMC.2018.8713162
See also references of EP 4286809A4
AUNSRI, N: "Effect of Window Functions on the Sequential Bayesian Filtering Based Frequency Estimation", THE 21ST INTERNATIONAL SYMPOSIUM ON WIRELESS PERSONAL MULTIMEDIA COMMUNICATIONS(WPMC- 2018, 2018, pages 411 - 415, XP033549174, DOI: 10.1109/WPMC.2018.8713162
See also references of EP 4286809A4
Attorney, Agent or Firm:
TAKAMURA, Jun (JP)
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