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1. 发明申请

US20110182436A1 Adaptive Noise Reduction Using Level Cues 有权
标题翻译：使用级别线索自适应降噪
公开(公告)号：US20110182436A1
公开(公告)日：2011-07-28
申请号：US12693998
申请日：2010-01-26
申请人： Carlo Murgia , Carlo Avendano , Karim Younes , Mark Every , Ye Jiang
发明人： Carlo Murgia , Carlo Avendano , Karim Younes , Mark Every , Ye Jiang
IPC分类号： G10K11/16
CPC分类号： G10K11/16 , H04R3/005
摘要： An array of microphones utilizes two sets of two microphones for noise suppression. A primary microphone and secondary microphone of the three microphones may be positioned closely spaced to each other to provide acoustic signals used to achieve noise cancellation. A tertiary microphone may be spaced with respect to either the primary microphone or the secondary microphone in a spread-microphone configuration for deriving level cues from audio signals provided by tertiary and the primary or secondary microphone. Signals from two microphones may be used rather than three microphones. The level cues are expressed via an inter-microphone level difference (ILD) which is used to determine one or more cluster tracking control signals. The ILD based cluster tracking signals are used to control the adaptation of null-processing noise cancellation modules. A noise cancelled primary acoustic signal and ILD based cluster tracking control signals are used during post filtering to adaptively generate a mask to be applied against a speech estimate signal.
摘要翻译：一组麦克风使用两组麦克风进行噪声抑制。三个麦克风的主麦克风和次麦克风可以彼此紧密地定位，以提供用于实现噪声消除的声信号。第三麦克风可以在扩展麦克风配置中相对于主麦克风或辅助麦克风间隔开，以从由三级麦克风和主麦克风或辅助麦克风提供的音频信号导出电平提示。可以使用来自两个麦克风的信号而不是三个麦克风。通过用于确定一个或多个集群跟踪控制信号的麦克风间级差（ILD）来表示电平提示。基于ILD的群集跟踪信号用于控制空处理噪声消除模块的适应。在后滤波期间使用噪声消除的主声信号和基于ILD的群集跟踪控制信号来自适应地生成针对语音估计信号应用的掩码。

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