Title:
WAVE-SOURCE-DIRECTION ESTIMATION DEVICE, WAVE-SOURCE-DIRECTION ESTIMATION METHOD, AND PROGRAM STORAGE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2020/003343
Kind Code:
A1
Abstract:
To reduce erroneous estimation of a virtual-image wave source and highly accurately estimate the direction of a wave source, this wave-source-direction estimation device is made to comprise: a plurality of input units for acquiring input signals based on waves; a signal selection unit for selecting a plurality of pairs that are each a combination of two input signals from among the plurality of input signals; a relative delay time calculation unit for calculating, as relative delay times, the wave arrival time differences for each direction from a wave source to the sensors that have supplied the two input signals composing each pair; and an integrated estimated direction information calculation unit for generating per-frequency estimated-direction-information for each pair of input signals using the pair of input signals and the relative delay times for the pair, calculating per-frequency contribution rates to the estimated direction information for each wave source direction using the per-frequency estimated-direction-information generated for each pair, using the calculated contribution rates to calculate weightings for each wave source direction that correspond to the similarity of the contribution rates between different pairs, and generating integrated estimated direction information in which the estimated direction information for each pair is weighted.
Inventors:
ARAI YUMI (JP)
KONDO REISHI (JP)
SENDA YUZO (JP)
KONDO REISHI (JP)
SENDA YUZO (JP)
Application Number:
PCT/JP2018/023971
Publication Date:
January 02, 2020
Filing Date:
June 25, 2018
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
G01S3/808; G01H3/00
Domestic Patent References:
| WO2018003158A1 | 2018-01-04 |
Foreign References:
| JP2011071686A | 2011-04-07 | |||
| JP2015161551A | 2015-09-07 | |||
| JP2010193323A | 2010-09-02 | |||
| JP2008089312A | 2008-04-17 | |||
| JP2010175431A | 2010-08-12 |
Other References:
KATO, MASANORI ET AL.: "TDOA Estimation Based on Phase-Voting Cross Correlation and Circular Standard Deviation", IEICE TECHNICAL REPORT, vol. 116, no. 477, March 2017 (2017-03-01), pages 1230 - 1234, XP033236133, ISSN: 0913-5685
KATO, MASANORI ET AL.: "TDOA Estimation Based on Phase-Voting Cross Correlation and Circular Standard Deviation", 2017 25TH EUROPEAN SIGNAL PROCESSING CONFERENCE (EUSIPCO, 2017, pages 1230 - 1234, XP033236133, ISBN: 978-0-9928626-7-1, DOI: 10.23919/EUSIPCO.2017.8081404
KATO, MASANORI ET AL.: "TDOA Estimation Based on Phase-Voting Cross Correlation and Circular Standard Deviation", 2017 25TH EUROPEAN SIGNAL PROCESSING CONFERENCE (EUSIPCO, 2017, pages 1230 - 1234, XP033236133, ISBN: 978-0-9928626-7-1, DOI: 10.23919/EUSIPCO.2017.8081404
Attorney, Agent or Firm:
SHIMOSAKA Naoki (JP)
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