Title:
DEVICE FOR ESTIMATING SPEED OF MOVING SOUND SOURCE, SPEED MONITORING SYSTEM, METHOD FOR ESTIMATING SPEED OF MOVING SOUND SOURCE, AND STORAGE MEDIUM IN WHICH PROGRAM FOR ESTIMATING SPEED OF MOVING SOUND SOURCE IS STORED
Document Type and Number:
WIPO Patent Application WO/2018/047805
Kind Code:
A1
Abstract:
[Problem] To provide a device for estimating the speed of a moving sound source, a speed monitoring system, a method for estimating the speed of a moving sound source, and a program for estimating the speed of a moving sound source, whereby the speed of a moving sound source can be appropriately estimated on the basis of a sound not having a definite peak frequency. [Solution] A sound signal corresponding to a sound emitted by a sound source is inputted to a frequency analysis unit (101), and the frequency analysis unit (101) performs frequency analysis of the sound signal and generates a spectrogram. Spectrogram template information indicating spectrograms corresponding to each of at least a plurality of predetermined movement speeds, the spectrograms being for cases in which the sound source is moved, is stored in a model storage unit (102). An estimation unit (103) estimates the movement speed of the sound source on the basis of the spectrogram generated by the frequency analysis unit (101) and the plurality of spectrograms indicated by the spectrogram template information stored in the model storage unit (102).
Inventors:
KOMATSU TATSUYA (JP)
SENDA YUZO (JP)
SENDA YUZO (JP)
Application Number:
PCT/JP2017/031897
Publication Date:
March 15, 2018
Filing Date:
September 05, 2017
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
G01S11/14; G08G1/01
Domestic Patent References:
| WO2013140747A1 | 2013-09-26 |
Foreign References:
| JP2000329838A | 2000-11-30 | |||
| JP2004191180A | 2004-07-08 | |||
| US20120098704A1 | 2012-04-26 | |||
| JP2003272089A | 2003-09-26 | |||
| JP2012145461A | 2012-08-02 | |||
| JPH05114098A | 1993-05-07 | |||
| US20110227782A1 | 2011-09-22 |
Attorney, Agent or Firm:
SHIMOSAKA Naoki (JP)
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