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US-2024422466-A1 · Dec 19, 2024 · US
System and method for multi-channel noise suppression based on closed-form solutions and estimation of time-varying complex statistics
US8965757B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8965757-B2 |
| Application number | US-201113295818-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 14, 2011 |
| Priority date | Nov 12, 2010 |
| Publication date | Feb 24, 2015 |
| Grant date | Feb 24, 2015 |
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Abstract
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Multi-channel noise suppression systems and methods are described that omit the traditional delay-and-sum fixed beamformer in devices that include a primary speech microphone and at least one noise reference microphone with the desired speech being in the near-field of the device. The multi-channel noise suppression systems and methods use a blocking matrix (BM) to remove desired speech in the input speech signal received by the noise reference microphone to get a “cleaner” background noise component. Then, an adaptive noise canceler (ANC) is used to remove the background noise in the input speech signal received by the primary speech microphone based on the “cleaner” background noise component to achieve noise suppression. The filters implemented by the BM and ANC are derived using closed-form solutions that require calculation of time-varying statistics of complex frequency domain signals in the noise suppression system.
First claim
Opening claim text (preview).
What is claimed is: 1. A system for suppressing noise in a primary input speech signal that comprises a first desired speech component and a first background noise component using a reference input speech signal that comprises a second desired speech component and a second background noise component, the system comprising: a blocking matrix configured to filter the primary input speech signal, in accordance with a first transfer function, to estimate the second desired speech comp…
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- G10L21/0208Primary
Physics · mapped topic
Physics · mapped topic
Electricity · mapped topic
Electricity · mapped topic
Physics · mapped topic
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- What does patent US8965757B2 cover?
- Multi-channel noise suppression systems and methods are described that omit the traditional delay-and-sum fixed beamformer in devices that include a primary speech microphone and at least one noise reference microphone with the desired speech being in the near-field of the device. The multi-channel noise suppression systems and methods use a blocking matrix (BM) to remove desired speech in the …
- Who is the assignee on this patent?
- Thyssen Jes, Zeng Huaiyu, Chen Juin-Hwey, and 3 more
- What technology area does this patent fall under?
- Primary CPC classification G10L21/0208. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Feb 24 2015 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).