Empirical mode decomposition for analyzing acoustical signals
First Claim
1. A computer implemented method of analyzing an acoustical signal, comprising:
- inputting the acoustical signal;
extracting a set of intrinsic mode functions from the acoustical signal; and
storing said set of intrinsic mode functions of the acoustical signal.
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Abstract
The present invention discloses a computer implemented signal analysis method through the Hilbert-Huang Transformation (HHT) for analyzing acoustical signals, which are assumed to be nonlinear and nonstationary. The Empirical Decomposition Method (EMD) and the Hilbert Spectral Analysis (HSA) are used to obtain the HHT. Essentially, the acoustical signal will be decomposed into the Intrinsic Mode Function Components (IMFs). Once the invention decomposes the acoustic signal into its constituting components, all operations such as analyzing, identifying, and removing unwanted signals can be performed on these components. Upon transforming the IMFs into Hilbert spectrum, the acoustical signal may be compared with other acoustical signals.
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Citations
20 Claims
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1. A computer implemented method of analyzing an acoustical signal, comprising:
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inputting the acoustical signal;
extracting a set of intrinsic mode functions from the acoustical signal; and
storing said set of intrinsic mode functions of the acoustical signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A computer implemented method of analyzing an acoustical signal, comprising:
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inputting the acoustical signal;
extracting a set of intrinsic mode functions from the acoustical signal;
storing said set of intrinsic mode functions of the acoustical signal; and
transforming said set of intrinsic mode functions with a Hilbert transform to generate a Hilbert spectrum. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A computer implemented method of analyzing an acoustical signal, comprising:
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inputting a first acoustical signal;
extracting a first set of intrinsic mode functions from the first acoustical signal;
transforming said first set of intrinsic mode functions with a Hilbert transform to generate a first Hilbert spectrum; and
storing said first Hilbert spectrum. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification