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    ADAPTIVE PHASE DIFFERENCE BASED NOISE REDUCTION FOR AUTOMATIC SPEECH RECOGNITION (ASR)
    1.
    发明授权
    ADAPTIVE PHASE DIFFERENCE BASED NOISE REDUCTION FOR AUTOMATIC SPEECH RECOGNITION (ASR) 有权

    公开(公告)号：EP3047483B1

    公开(公告)日：2018-12-05

    申请号：EP13783701.9

    申请日：2013-09-17

    申请人： Intel Corporation

    发明人： KURYLO, Lukasz ,  STEMMER, Georg

    IPC分类号： G10L21/0272 ,  G10L21/0232 ,  H04R3/00 ,  G10L21/0216

    CPC分类号： G10K11/178 ,  G10L21/0232 ,  G10L2021/02087 ,  G10L2021/02166 ,  H04M3/568 ,  H04R3/005

    摘要： Embodiments of a system and method for adapting a phase difference-based noise reduction system are generally described herein. In some embodiments, spatial information associated with a first and second audio signal are determined, wherein the first and second audio signals including a target audio inside a beam and noise from outside the beam. A signal-to-noise ratio (SNR) associated with the audio signals is estimated. A mapping of phase differences to gain factors is adapted for determination of attenuation factors for attenuating frequency bins associated with noise outside the beam. Spectral subtraction is performed to remove estimated noise from the single-channel signal based on a weighting that affects frequencies associated with a target signal less. Frequency dependent attenuation factors are applied to attenuate frequency bins outside the beam to produce a target signal having noise reduced.

    Noise suppression device and method
    2.
    发明授权
    Noise suppression device and method 有权

    公开(公告)号：EP2755204B1

    公开(公告)日：2018-10-10

    申请号：EP13196886.9

    申请日：2013-12-12

    申请人： FUJITSU LIMITED

    发明人： Matsumoto, Chikako

    IPC分类号： G10L21/0208 ,  G10L21/0216

    CPC分类号： G10L21/0208 ,  G10L21/0216 ,  G10L2021/02166 ,  H04R3/005 ,  H04R2430/20

    摘要： A noise suppression device includes a phase difference derived suppression coefficient computation section that over a phase difference utilization range computes for each frequency a phase difference derived suppression coefficient based on a phase difference, an amplitude ratio derived suppression coefficient computation section that computes for each frequency an amplitude ratio derived suppression coefficient based on an amplitude ratio or an amplitude difference, and based on the amplitude conditions, and a suppression section that suppresses noise contained in the input sound signals based on a suppression coefficient determined by using the phase difference derived suppression coefficient and the amplitude ratio derived suppression coefficient.

    NOISE CANCELLING MICROPHONE APPARATUS
    4.
    发明授权
    NOISE CANCELLING MICROPHONE APPARATUS 有权

    公开(公告)号：EP2973556B1

    公开(公告)日：2018-07-11

    申请号：EP14707581.6

    申请日：2014-02-14

    申请人： Kopin Corporation

    发明人： FAN, Dashen

    IPC分类号： G10L21/0208 ,  G10L21/0216

    CPC分类号： G02C11/10 ,  G02C11/06 ,  G10K11/002 ,  G10L21/0208 ,  G10L2021/02166 ,  H04R1/028 ,  H04R3/005 ,  Y10T29/49826

    摘要： Example embodiments include a method of reducing noise include forming a main signal and one or more reference signals at a beam-former based on at least two received audio signals, detecting voice activity at a voice activity detector, where the voice activity detector receives the main and reference signals and outputting a desired voice activity signal, adaptively cancelling noise at an adaptive noise canceller, where the adaptive noise canceller receives the main, reference, and desired voice activity signals and outputs an adaptive noise cancellation signal, and reducing noise at a noise reducer receiving the desired voice activity and adaptive noise cancellation signals and outputting a desired speech signal.

    PARAMETER PREDICTION DEVICE AND PARAMETER PREDICTION METHOD FOR ACOUSTIC SIGNAL PROCESSING
    7.
    发明公开
    PARAMETER PREDICTION DEVICE AND PARAMETER PREDICTION METHOD FOR ACOUSTIC SIGNAL PROCESSING 审中-公开
    声学信号处理参数预测装置及参数预测方法

    公开(公告)号：EP3301675A1

    公开(公告)日：2018-04-04

    申请号：EP17191774.3

    申请日：2017-09-19

    申请人： Panasonic Intellectual Property Corporation of America

    发明人： ICHIMURA, Daijiroh

    IPC分类号： G10L21/0208 ,  H04B3/23 ,  H04M9/08 ,  G10L21/0216 ,  G10L15/20

    CPC分类号： G10L21/0216 ,  G10L15/20 ,  G10L19/06 ,  G10L21/0208 ,  G10L21/0264 ,  G10L2021/02082 ,  G10L2021/02087 ,  G10L2021/02166

    摘要： A parameter prediction device includes: an environmental characteristic acquirer that acquires an environmental characteristic quantity set which quantifies one or more characteristics of a sound collection environment for an acoustic signal; a target setter that sets a target evaluation value set which provides one or more values obtained by quantifying one or more performances of processing of the acoustic signal, or one or more evaluation values of a processed acoustic signal; and a first predictor that inputs the environmental characteristic quantity set and the target evaluation value set as independent variables to a first prediction model, and predicts a control parameter set for controlling the acoustic signal processing.

    摘要翻译： 参数预测设备包括：环境特性获取器，其获取量化用于声学信号的声音采集环境的一个或多个特性的环境特性量集合; 目标设置器，其设置目标评估值组，该目标评估值组提供通过量化声学信号的处理的一个或多个性能或者处理后的声学信号的一个或多个评估值而获得的一个或多个值; 以及第一预测器，其将环境特征量集合和目标评价值集合作为独立变量输入到第一预测模型，并且预测用于控制声学信号处理的控制参数集合。

    SOUND ENHANCEMENT METHOD, DEVICE, PROGRAM, AND RECORDING MEDIUM
    8.
    发明授权
    SOUND ENHANCEMENT METHOD, DEVICE, PROGRAM, AND RECORDING MEDIUM 有权
    声音增强方法，装置，程序和记录介质

    公开(公告)号：EP2642768B1

    公开(公告)日：2018-03-14

    申请号：EP11852100.4

    申请日：2011-12-19

    申请人： Nippon Telegraph And Telephone Corporation

    发明人： NIWA, Kenta ,  SAKAUCHI, Sumitaka ,  FURUYA, Kenichi ,  HANEDA, Yoichi

    IPC分类号： H04R3/00 ,  G10L21/02 ,  H04R1/40

    CPC分类号： H04R3/00 ,  G10L21/0232 ,  G10L2021/02082 ,  G10L2021/02166 ,  H04R3/005 ,  H04R2430/03

    摘要： There is provided a sound enhancement technique that picks up sounds with a sufficiently large SN ratio, achieves a sharper directivity in a desired direction than was possible by conventional techniques while being capable of following sounds from any directions, and is capable of enhancing sounds according to distances from a microphone array. The technique uses transfer functions a i,g of sounds that comes from each of one or more positions/directions that are assumed to be sound sources arrives at each microphone to obtain a filter for a position that is a target of sound enhancement, where i denotes a direction and g denotes a distance for identifying each of the positions. Each of the transfer functions a i,g is represented by the sum of a transmission characteristic of a direct sound that directly arrives from the position determined by the direction i and the distance g and a transmission characteristic of one or more reflected sounds produced by reflection of the direct sound off an reflective object and arrive. A filter that corresponds to the position that is the target of sound enhancement is applied to frequency-domain signals transformed from M picked-up sounds picked up with M microphones to obtain a frequency-domain output signal.

    DIRECTION OF ARRIVAL ESTIMATION IN MINIATURE DEVICES USING A SOUND SENSOR ARRAY
    10.
    发明公开
    DIRECTION OF ARRIVAL ESTIMATION IN MINIATURE DEVICES USING A SOUND SENSOR ARRAY 审中-公开
    使用声音传感器阵列在小型设备中到达估计的方向

    公开(公告)号：EP3267697A1

    公开(公告)日：2018-01-10

    申请号：EP17179464.7

    申请日：2017-07-04

    申请人： Oticon A/S

    发明人： LUNNER, Thomas ,  GUSTAFSSON, Fredrik ,  LINDGREN, David ,  HENDEBY, Gustaf

    IPC分类号： H04R25/00

    CPC分类号： H04R25/407 ,  G10L2021/02166 ,  H04R2203/12 ,  H04R2430/23

    摘要： A hearing device comprises a sound system for estimating the direction of arrival of sound emitted by one or more sound sources creating a sound field. The sound system comprises an array of N sound receiving transducers (microphones), each providing an electric input signal, a processing unit comprising a) a model unit comprising a parametric model configured to be able to describe the sound field at the array as a function of the direction of arrival in a region surrounding and adjacent to the array; b)a model optimizing unit configured to optimize said model with respect to its parameters based on said sound samples; c) a cost optimizing unit configured to minimize a cost function of the model with respect to said direction of arrivals; d) an estimating unit configured to estimate the direction of arrival based on said parametric model with the optimized parameters and the optimized cost function.

    摘要翻译： 听力装置包括用于估计由产生声场的一个或多个声源发射的声音的到达方向的声音系统。 声音系统包括N个声音接收换能器（麦克风）的阵列，每个提供电输入信号，处理单元包括a）包括参数模型的模型单元，该参数模型被配置为能够将阵列处的声场描述为函数 到达阵列周围和邻近区域的方向; b）模型优化单元，被配置为基于所述声音样本关于其参数优化所述模型; c）成本优化单元，其被配置为使所述模型的成本函数相对于所述到达方向最小化; d）估计单元，被配置为基于具有优化参数和优化成本函数的所述参数模型来估计到达方向。