Artificial auxiliary extraction method for time-frequency characteristics of frequency modulation type signals of aquatic animals

Artificial auxiliary extraction method for time-frequency characteristics of frequency modulation type signals of aquatic animals

The invention relates to an artificial auxiliary extraction method for time-frequency characteristics of frequency modulation type signals of aquatic animals, and belongs to the field of signal processing. Theartificial auxiliary extraction method comprises the following steps of: preliminarily dete...

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Hauptverfasser: LIU ZONGWEI, LYU LIANGANG, JIANG YING, YANG CHUNMEI, GUO JINGSONG
Format: Patent
Sprache:chi ; eng
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CALCULATING
COMPUTING
COUNTING
HANDLING RECORD CARRIERS
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
PHYSICS
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
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creator LIU ZONGWEI
LYU LIANGANG
JIANG YING
YANG CHUNMEI
GUO JINGSONG
description The invention relates to an artificial auxiliary extraction method for time-frequency characteristics of frequency modulation type signals of aquatic animals, and belongs to the field of signal processing. Theartificial auxiliary extraction method comprises the following steps of: preliminarily determining the trend of each profile curve of the signals by adopting artificial auxiliary point selection according to narrow-band frequency modulation characteristics of the signals; finely adjusting manually selected points to ensure that the manually selected points fall on the contour line, and determining initial and end points of the contour; automatically obtaining contour points at equal intervals, and obtaining the frequency of the signal and an energy modulation function through an interpolation algorithm; and automatically extracting acoustic characteristic parameters such as starting frequency, inflection point number, harmonic number and contour type according to the modulation function. According to the
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subjects CALCULATING
COMPUTING
COUNTING
HANDLING RECORD CARRIERS
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
PHYSICS
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
title Artificial auxiliary extraction method for time-frequency characteristics of frequency modulation type signals of aquatic animals
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