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1. (WO2018047805) 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

Pub. No.:    WO/2018/047805    International Application No.:    PCT/JP2017/031897
Publication Date: Fri Mar 16 00:59:59 CET 2018 International Filing Date: Wed Sep 06 01:59:59 CEST 2017
IPC: G01S 11/14
G08G 1/01
Applicants: NEC CORPORATION
日本電気株式会社
Inventors: KOMATSU Tatsuya
小松 達也
SENDA Yuzo
仙田 裕三
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
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).