发明名称 |
Noise suppression based on null coherence |
摘要 |
Noise suppression is performed based on null coherence between sub-band signals of a primary acoustic signal and a secondary acoustic signal. The null coherence of a signal refers to portions of the signal that have high coherence and can be nullified by a null processor. The nullified component corresponds to target sources, such as an individual speaking into a phone. The coherence values indicate the presence of a target source and are used to suppress noise in portions of a signal that are not dominated by a desired target source. The inter-microphone level difference may be used in combination with the null coherence to provide noise suppression. |
申请公布号 |
US8682006(B1) |
申请公布日期 |
2014.03.25 |
申请号 |
US201113157238 |
申请日期 |
2011.06.09 |
申请人 |
LAROCHE JEAN;AVENDANO CARLOS;AUDIENCE, INC. |
发明人 |
LAROCHE JEAN;AVENDANO CARLOS |
分类号 |
H04B15/00;A61F11/06;G10L21/00 |
主分类号 |
H04B15/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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