Abstract
A method for estimating noise in an audio signal includes determining an energy value for the audio signal, converting the energy value into the log2-domain, and estimating a noise level for the audio signal based on the converted energy value directly in the log2-domain. The energy value is converted into the log2-domain as follows: En_log=⌊log21+En_lin⋅2N⌋2N└ x┘floor (x), indicating the largest integer less than or equal to x,E<sub>n_log</sub>energy value of band n in the log2-domain,E<sub>n_lin</sub>energy value of band n in the linear domain,Nquantization resolution.Determining the energy value includes obtaining a power spectrum of the audio signal by a combination of several transformations covering different parts of the spectrum.
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| 4G,3G | 06/03/2016 | ISLD-201512-009 | FRAUNHOFER SOCIETY | No | Family Member | ||||
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