SIGNAL PROCESSING DEVICE, SIGNAL PROCESSING METHOD, AND NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM
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United States of America Patent
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Issued Date -
Sep 21, 2023
app pub date -
Sep 29, 2020
filing date -
Sep 29, 2020
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Abstract
A signal processing device according to an aspect of the present disclosure comprises: cutout means that cuts out a target signal in a predetermined section, and an overlap signal in a section not matching the predetermined section but overlapping with at least part of the predetermined section from an input signal; conversion means that converts the target signal and the overlap signal into a phase component signal in a frequency domain with respect to each frequency; gradient calculation means that, based on the phase component signal, calculates, at each frequency, a phase gradient that is the gradient of the phase component at the frequency; score calculation means that calculates a score relating to the sudden change characteristic of the input signal according to the phase gradients; and determination means that, based on the score, determines the presence or absence of a sudden change in the target signal.
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