METHOD AND SYSTEM FOR AUDIO RECOGNITION BASED ON EMPIRICAL MODE DECOMPOSITION

WIPO Patent Application WO/2017/144007

A1

A method and a system for audio recognition based on empirical mode decomposition. The method comprises the following steps: A. loading an original audio signal, sampling the original audio signal, then implementing a preliminary denoising treatment, applying a Hamming window, and performing a Fourier transform in that order to obtain spectral density data, then connecting the spectral density data of every frame to obtain a spectrogram (S101); B. obtaining, from the spectrogram, a point with the highest energy intensity at every frequency band, and then connecting the points with the highest energy intensity at each of the frequency bands to generate a time-frequency curve (S102); C. implementing empirical mode decomposition of the time-frequency curve generated, and obtaining a plurality of intrinsic mode functions (S103); and D. generating, by means of the plurality of intrinsic mode functions combined with a corresponding frequency band and time frame, a plurality of eigenvalues representing the original audio signal, then exporting the eigenvalues (S104). The invention fully integrates change and trend data of an audio feature to generate an eigenvalue, allowing the generated eigenvalue to provide a more comprehensive representation of an audio signal.

YUE TINGMING (CN)

PCT/CN2017/074706

August 31, 2017

February 24, 2017

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SHENZHEN SKYWORTH DIGITAL TECH CO LTD (CN)
SHENZHEN SKYWORTH SOFTWARE CO (CN)

G10L21/0208

CN105788603A	2016-07-20
CN104795064A	2015-07-22
US20030033094A1	2003-02-13
CN101727905A	2010-06-09
US20090116595A1	2009-05-07

JOHNSON INTELLECTUAL PROPERTY AGENCY (SHENZHEN) (CN)

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