Adaptive noise reduction using level cues
US-9437180-B2 · Sep 6, 2016 · US
Adaptively reducing noise to limit speech distortion
US9502048B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9502048-B2 |
| Application number | US-201514850911-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 10, 2015 |
| Priority date | Apr 19, 2010 |
| Publication date | Nov 22, 2016 |
| Grant date | Nov 22, 2016 |
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Abstract
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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.
First claim
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What is claimed is: 1. A method for reducing noise within an acoustic signal, comprising: separating, via at least one computer hardware processor, an acoustic signal into a plurality of sub-band signals, the acoustic signal representing at least one captured sound; and reducing an energy level of a noise component in a sub-band signal in the plurality of sub-band signals based on an estimated threshold level of speech loss distortion in the sub-band signal, the reducing being i…
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Electricity · mapped topic
Physics · mapped topic
- G10L21/02Primary
Physics · mapped topic
Physics · mapped topic
- G10L21/0208Primary
Physics · mapped topic
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- What does patent US9502048B2 cover?
- 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 leve…
- Who is the assignee on this patent?
- Knowles Electronics Llc
- What technology area does this patent fall under?
- Primary CPC classification G10L21/02. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Nov 22 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).