Feature extraction apparatus, anomaly score estimation apparatus, methods therefor, and program

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United States of America Patent

PATENT NO 11971332
APP PUB NO 20220260459A1
SERIAL NO

17630141

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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By appropriately registering a sound with an arbitrary length to be registered, erroneous determination is suppressed. A normal sound registration apparatus 1 extracts a feature amount with a fixed-length from a time-series acoustic signal with a variable arbitrary length. A frequency conversion unit 12 acquires a time-series frequency signal obtained by frequency-converting the time-series acoustic signal. A feature extraction unit 14 extracts a feature amount from the time-series acoustic signal. The feature extraction unit 14 is optimized to extract, from the time-series acoustic signal including at least a known normal sound and an unknown normal sound, a feature amount which reflects a feature of the unknown normal sound, and to extract, from the time-series acoustic signal including at least an anomalous sound and a normal sound, a feature amount which reflects a feature of the anomalous sound.

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Patent Owner(s)

  • NEC CORPORATION AND NIPPON TELEGRAPH AND TELEPHONE CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Koizumi, Yuma Tokyo, JP 25 24
Saito, Shoichiro Tokyo, JP 43 110

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