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    ADAPTIVE PHASE DIFFERENCE BASED NOISE REDUCTION FOR AUTOMATIC SPEECH RECOGNITION (ASR)
    2.
    发明申请
    ADAPTIVE PHASE DIFFERENCE BASED NOISE REDUCTION FOR AUTOMATIC SPEECH RECOGNITION (ASR) 有权
    自适应语音识别自适应噪声抑制（ASR）

    公开(公告)号：US20150078571A1

    公开(公告)日：2015-03-19

    申请号：US14124790

    申请日：2013-09-17

    申请人： Lukasz Kurylo ,  Georg Stemmer

    发明人： Lukasz Kurylo ,  Georg Stemmer

    IPC分类号： G10K11/178

    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.

    摘要翻译： 这里一般地描述用于适配基于相位差的降噪系统的系统和方法的实施例。 在一些实施例中，确定与第一和第二音频信号相关联的空间信息，其中第一和第二音频信号包括波束内的目标音频和来自波束外的噪声。 估计与音频信号相关联的信噪比（SNR）。 相位差与增益因子的映射适用于确定用于衰减与波束外的噪声相关联的频率仓的衰减因子。 基于影响与目标信号相关的频率的加权，进行光谱减法以从单信道信号中去除估计的噪声。 应用频率相关的衰减因子来衰减波束外的频率仓，以产生具有降噪的目标信号。