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US Patent 7930178 Speech modeling and enhancement based on magnitude-normalized spectra

Patent 7930178 was granted and assigned to Microsoft on April, 2011 by the United States Patent and Trademark Office.

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Patent abstract

A frame of a speech signal is converted into the spectral domain to identify a plurality of frequency components and an energy value for the frame is determined. The plurality of frequency components is divided by the energy value for the frame to form energy-normalized frequency components. A model is then constructed from the energy-normalized frequency components and can be used for speech recognition and speech enhancement.

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