US Patent 9143857 Adaptively reducing noise while limiting speech loss distortion
Patent 9143857 was granted and assigned to Audience (company) on September, 2015 by the United States Patent and Trademark Office.
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The present technology provides adaptive noise reduction of an acoustic signal using a sophisticated level of control to balance the tradeoff between speech loss distortion and noise reduction. The energy level of a noise component in a sub-band signal of the acoustic signal is reduced based on an estimated signal-to-noise ratio of the sub-band signal, and further on an estimated threshold level of speech distortion in the sub-band signal. In various embodiments, the energy level of the noise component in the sub-band signal may be reduced to no less than a residual noise target level. Such a target level may be defined as a level at which the noise component ceases to be perceptible.
US Patent 09143857 Adaptively reducing noise while limiting speech loss distortion US Patent 9143857 Adaptively reducing noise while limiting speech loss distortion
US Patent 09143857 Adaptively reducing noise while limiting speech loss distortion
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