发明名称 |
BREATH DETECTION DEVICE AND BREATH DETECTION METHOD |
摘要 |
Whether a breath sound is contained in a current frame is determined by using a characteristic that a breath sound is small in autocorrelation and large in cross-correlation. Specifically, a harmonic-wave-structure estimating unit finds autocorrelation on the basis of a frequency spectrum of the current frame. A cross-correlation estimating unit finds cross-correlation between the frequency spectrum of the current frame and a frequency spectrum of a previous frame containing a breath sound. A breath detecting unit compares a value of a constant multiple of a value of the autocorrelation with a value of the cross-correlation, and, when the value of the cross-correlation is larger, determines that a breath sound is contained in the current frame.
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申请公布号 |
US2013178756(A1) |
申请公布日期 |
2013.07.11 |
申请号 |
US201313780274 |
申请日期 |
2013.02.28 |
申请人 |
FUJITSU LIMITED;FUJITSU LIMITED |
发明人 |
SUZUKI MASANAO;TANAKA MASAKIYO;OTA YASUJI |
分类号 |
A61B5/08;A61B5/00;A61B7/00 |
主分类号 |
A61B5/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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