Audio signal processing apparatus and method thereof
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United States of America Patent
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May 9, 2017
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Jan 14, 2015
filing date -
Jan 20, 2014
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Abstract
An audio signal in which a first audio component and a second audio component are mixed is inputted. The audio signal is transformed into a time-frequency signal representing relation between time and signal frequency. The time-frequency signal is divided into a plurality of bands. A time-frequency signal in a band, in which influence from the second audio component is small among the plurality of bands, is factorized into activity vectors composing a first activity matrix. The time-frequency signal transformed from the audio signal is factorized into activity vectors composing a second activity matrix using the first activity matrix as a teacher activity.
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