LEFT-BEHIND DETECTION METHOD, LEFT-BEHIND DETECTION DEVICE, AND PROGRAM

Title:

LEFT-BEHIND DETECTION METHOD, LEFT-BEHIND DETECTION DEVICE, AND PROGRAM

Document Type and Number:

WIPO Patent Application WO/2021/205560

Kind Code:

A1

Abstract:

The objective of the invention is to detect an infant left behind in an automobile, without installing a dedicated sensor. A microphone (M1) installed in an automobile collects acoustic signals. An autocorrelation unit (11) obtains an autocorrelation function from acoustic signals. A peak detection unit (12) detects the time at an autocorrelation value peak as a pitch period. An inverse number calculation unit (13) calculates the inverse number of the peak period as a pitch frequency. The pitch determination unit (21) determines whether or not the pitch frequency is included in a predetermined frequency band.

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Inventors:

KOBAYASHI KAZUNORI (JP)
MURATA SHIN (JP)

Application Number:

PCT/JP2020/015795

Publication Date:

October 14, 2021

Filing Date:

April 08, 2020

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Assignee:

NIPPON TELEGRAPH & TELEPHONE (JP)

International Classes:

G10L15/00; G10L15/10; G10L25/51; G10L25/90

Foreign References:

JP2019099086A	2019-06-24
JP2016102822A	2016-06-02
JP2007511812A	2007-05-10

Attorney, Agent or Firm:

NAKAO, Naoki et al. (JP)

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