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    Separation of target acoustic signals in a multi-transducer arrangement
    22.
    发明申请
    Separation of target acoustic signals in a multi-transducer arrangement 有权
    在多换能器布置中分离目标声信号

    公开(公告)号：US20050060142A1

    公开(公告)日：2005-03-17

    申请号：US10897219

    申请日：2004-07-22

    申请人： Erik Visser ,  Te-Won Lee

    发明人： Erik Visser ,  Te-Won Lee

    IPC分类号： G10L21/02

    CPC分类号： H04R3/005 ,  G10L21/0208 ,  G10L21/0272 ,  G10L2021/02161 ,  G10L2021/02165 ,  H04R2430/25

    摘要： The present invention provides a process for separating a good quality information signal from a noisy acoustic environment. The separation process uses a set of a least two spaced-apart transducers to capture noise and information components. The transducer signals, which have both a noise and information component, are received into a separation process. The separation process generates one channel that is substantially only noise, and another channel that is a combination of noise and information. An identification process is used to identify which channel has the information component. The noise signal is then used to set process characteristics that are applied to the combination signal to efficiently reduce or eliminate the noise component. In this way, the noise is effectively removed from the combination signal to generate a good qualify information signal. The information signal may be, for example, a speech signal, a seismic signal, a sonar signal, or other acoustic signal.

    摘要翻译： 本发明提供了一种用于从良好的声学环境中分离出良好质量信息信号的方法。 分离过程使用一组至少两个间隔开的传感器来捕获噪声和信息分量。 具有噪声和信息分量的换能器信号被接收到分离过程中。 分离过程产生基本上只有噪声的一个信道，以及作为噪声和信息的组合的另一个信道。 使用识别过程来识别哪个信道具有信息分量。 然后使用噪声信号来设置施加到组合信号的处理特性，以有效地减少或消除噪声分量。 以这种方式，有效地从组合信号中去除噪声以产生良好的限定信息信号。 信息信号可以是例如语音信号，地震信号，声纳信号或其他声信号。

    Systems, methods, and apparatus for speech feature detection
    23.
    发明授权
    Systems, methods, and apparatus for speech feature detection 有权
    用于语音特征检测的系统，方法和装置

    公开(公告)号：US09165567B2

    公开(公告)日：2015-10-20

    申请号：US13092502

    申请日：2011-04-22

    申请人： Erik Visser ,  Ian Ernan Liu ,  Jongwon Shin

    发明人： Erik Visser ,  Ian Ernan Liu ,  Jongwon Shin

    IPC分类号： G10L21/00 ,  G10L25/78

    CPC分类号： G10L25/78

    摘要： Implementations and applications are disclosed for detection of a transition in a voice activity state of an audio signal, based on a change in energy that is consistent in time across a range of frequencies of the signal. For example, such detection may be based on a time derivative of energy for each of a number of different frequency components of the signal.

    摘要翻译： 公开了实现和应用，用于基于在信号的频率范围内的时间上一致的能量变化来检测音频信号的语音活动状态中的转换。 例如，这种检测可以基于信号的多个不同频率分量中的每一个的能量的时间导数。

    Variable beamforming with a mobile platform
    26.
    发明授权
    Variable beamforming with a mobile platform 有权

    公开(公告)号：US08525868B2

    公开(公告)日：2013-09-03

    申请号：US13006303

    申请日：2011-01-13

    申请人： Babak Forutanpour ,  Andre Gustavo P. Schevciw ,  Erik Visser ,  Brian Momeyer

    发明人： Babak Forutanpour ,  Andre Gustavo P. Schevciw ,  Erik Visser ,  Brian Momeyer

    IPC分类号： H04N7/15

    CPC分类号： H04R3/005 ,  H04R2201/40 ,  H04R2410/01 ,  H04R2430/25 ,  H04R2499/11 ,  H04R2499/15

    摘要： A mobile platform includes a microphone array and is capable of implementing beamforming to amplify or suppress audio information from a sound source. The sound source is indicated through a user input, such as pointing the mobile platform in the direction of the sound source or through a touch screen display interface. The mobile platform further includes orientation sensors capable of detecting movement of the mobile platform. When the mobile platform moves with respect to the sound source, the beamforming is adjusted based on the data from the orientation sensors so that beamforming is continuously implemented in the direction of the sound source. The audio information from the sound source may be included or suppressed from a telephone or video-telephony conversation. Images or video from a camera may be likewise controlled based on the data from the orientation sensors.

    BLIND SOURCE SEPARATION BASED SPATIAL FILTERING
    27.
    发明申请
    BLIND SOURCE SEPARATION BASED SPATIAL FILTERING 审中-公开
    基于盲源分离的空间滤波

    公开(公告)号：US20120294446A1

    公开(公告)日：2012-11-22

    申请号：US13370934

    申请日：2012-02-10

    申请人： Erik Visser ,  Lae-Hoon Kim ,  Pei Xiang

    发明人： Erik Visser ,  Lae-Hoon Kim ,  Pei Xiang

    IPC分类号： H04R5/00

    CPC分类号： H04S1/007 ,  H04S7/301 ,  H04S7/303 ,  H04S2420/01

    摘要： A method for blind source separation based spatial filtering on an electronic device includes obtaining a first source audio signal and a second source audio signal. The method also includes applying a blind source separation filter set to the first source audio signal and to the second source audio signal to produce a spatially filtered first audio signal and a spatially filtered second audio signal. The method further includes playing the spatially filtered first audio signal over a first speaker to produce an acoustic spatially filtered first audio signal and playing the spatially filtered second audio signal over a second speaker to produce an acoustic spatially filtered second audio signal. The acoustic spatially filtered first audio signal and the acoustic spatially filtered second audio signal produce an isolated acoustic first source audio signal at a first position and an isolated acoustic second source audio signal at a second position.

    摘要翻译： 一种用于在电子设备上进行基于盲源分离的空间滤波的方法包括获得第一源音频信号和第二源音频信号。 该方法还包括将盲源分离滤波器组应用于第一源音频信号和第二源音频信号以产生经空间滤波的第一音频信号和经空间滤波的第二音频信号。 该方法还包括通过第一扬声器播放经空间滤波的第一音频信号以产生声学空间滤波的第一音频信号，并通过第二扬声器播放经空间滤波的第二音频信号，以产生声学空间滤波的第二音频信号。 声空间滤波的第一音频信号和声学空间滤波的第二音频信号在第一位置处产生隔离的声学第一源音频信号，并在第二位置处产生隔离的声学第二源音频信号。

    MICROPHONE ARRAY SUBSET SELECTION FOR ROBUST NOISE REDUCTION
    29.
    发明申请
    MICROPHONE ARRAY SUBSET SELECTION FOR ROBUST NOISE REDUCTION 有权
    麦克风阵列选择减少噪声噪声

    公开(公告)号：US20120051548A1

    公开(公告)日：2012-03-01

    申请号：US13029582

    申请日：2011-02-17

    申请人： Erik Visser ,  Ernan Liu

    发明人： Erik Visser ,  Ernan Liu

    IPC分类号： H04R29/00

    CPC分类号： H04R3/005 ,  G10L21/0208 ,  G10L2021/02166

    摘要： A disclosed method selects a plurality of fewer than all of the channels of a multichannel signal, based on information relating to the direction of arrival of at least one frequency component of the multichannel signal.

    摘要翻译： 所公开的方法基于与多信道信号的至少一个频率分量的到达方向有关的信息来选择多通道信号的多于少于全部的信道。