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    • 3. 发明授权
    • Stepsize determination of adaptive filter for cancelling voice portion by combining open-loop and closed-loop approaches
    • 通过组合开环和闭环方法,来逐步确定自适应滤波器来消除语音部分
    • US09589572B2
    • 2017-03-07
    • US14702687
    • 2015-05-02
    • Yang Gao
    • Yang Gao
    • A61F11/06G10L21/0208G10L21/0216
    • G10L21/0208G10L2021/02166
    • In accordance with an embodiment of the present invention, a noise reduction method for speech processing includes estimating a noise/interference component signal by subtracting voice component signal from a first microphone input signal wherein the voice component signal is evaluated as a first replica signal produced by passing a second microphone input signal through a first adaptive filter; a stepsize is estimated to control adaptive update of the first adaptive filter, wherein the stepsize is evaluated by combing an open-loop approach and a closed-loop approach, the open-loop approach comprising voice/noise/interference classification and SNR estimation in voice area, and the closed-loop approach comprising calculating a normalized correlation between the first replica signal and the first microphone input signal. A noise/interference reduced signal is outputted by subtracting a second replica signal from a target signal which is the first microphone input signal or the second microphone input signal, wherein the second replica signal is produced by passing the estimated noise/interference component signal through a second adaptive filter.
    • 根据本发明的实施例,用于语音处理的噪声降低方法包括:通过从第一麦克风输入信号中减去语音分量信号来估计噪声/干扰分量信号,其中语音分量信号被评估为第一复制信号,其由 通过第一自适应滤波器传递第二麦克风输入信号; 估计步长来控制第一自适应滤波器的自适应更新,其中通过组合开环方法和闭环方法评估步长,包括语音/噪声/干扰分类和声音中的SNR估计的开环方法 区域和闭环方法,包括计算第一复制信号和第一麦克风输入信号之间的归一化相关性。 通过从作为第一麦克风输入信号或第二麦克风输入信号的目标信号减去第二复制信号来输出噪声/干扰降低信号,其中通过将估计的噪声/干扰分量信号通过一个 第二自适应滤波器。
    • 5. 发明授权
    • Noise energy controlling in noise reduction system with two microphones
    • 具有两个麦克风的降噪系统中的噪声能量控制
    • US09510096B2
    • 2016-11-29
    • US14702688
    • 2015-05-02
    • Yang Gao
    • Yang Gao
    • G10K11/16H04R3/00G10K11/178H04R5/04
    • H04R3/005G10K11/178H04R3/002H04R5/04H04R2201/403H04R2410/01
    • In accordance with an embodiment of the present invention, a noise reduction method for speech processing includes cancelling or reducing noise/interference component signal in speech signal enhancement processing, the method comprising estimating the noise/interference component signal by subtracting voice component signal from a first microphone input signal wherein the voice component signal is evaluated as a first replica signal produced by passing a second microphone input signal through a first adaptive filter. Energy variation of the noise/interference component signal is adjusted based on noise stability detection and/or energy explosion detection, wherein the energy of the noise/interference component signal is reduced or smoothed in voice area or energy explosion area if the stable noise is detected and/or the energy explosion is detected. A noise/interference reduced signal is outputted by subtracting a second replica signal from the target signal, wherein the second replica signal is produced by passing the adjusted noise/interference component signal through a second adaptive filter.
    • 根据本发明的实施例,用于语音处理的噪声降低方法包括:消除或减少语音信号增强处理中的噪声/干扰分量信号,所述方法包括:通过从第一信号中减去语音分量信号来估计噪声/干扰分量信号 麦克风输入信号,其中语音分量信号被评估为通过使第二麦克风输入信号通过第一自适应滤波器而产生的第一复制信号。 基于噪声稳定性检测和/或能量爆炸检测来调整噪声/干扰分量信号的能量变化,其中如果检测到稳定的噪声,噪声/干扰分量信号的能量在话音区域或能量爆炸区域被减少或平滑 和/或检测到能量爆炸。 通过从目标信号中减去第二副本信号来输出噪声/干扰减小信号,其中通过使调整的噪声/干扰分量信号通过第二自适应滤波器来产生第二复制信号。
    • 7. 发明授权
    • Adaptive tilt compensation for synthesized speech
    • 合成语音的自适应倾斜补偿
    • US09401156B2
    • 2016-07-26
    • US12215649
    • 2008-06-27
    • Huan-Yu SuYang Gao
    • Huan-Yu SuYang Gao
    • G10L19/09G10L19/12G10L19/18G10L19/20G10L25/90G10L19/02G10L19/00
    • G10L19/12G10L19/0204G10L19/09G10L19/18G10L19/20G10L25/90G10L2019/0002G10L2019/0016
    • There is provided a method of using an adaptive tilt compensation by a speech decoder. The method comprises receiving a bit stream including a plurality of parameters representative of a speech signal; identifying an adaptive code vector and a fixed code vector using the plurality of parameters; scaling the adaptive code vector and the fixed code vector to generate a scaled adaptive code vector and a scaled fixed code vector; summing the scaled adaptive code vector and the scaled fixed code vector to generate a synthesized output; calculating a first reflection coefficient based on the plurality of parameters representative of the speech signal; multiplying the first reflection coefficient by a factor to generate a tilt factor; and applying the tilt factor to the synthesized output based on an encoding bit rate.
    • 提供了一种通过语音解码器使用自适应倾斜补偿的方法。 该方法包括:接收包括表示语音信号的多个参数的比特流; 使用所述多个参数来识别自适应码矢量和固定码矢量; 缩放自适应码矢量和固定码矢量以生成缩放的自适应码矢量和缩放的固定码矢量; 对经缩放的自适应码矢量和缩放的固定码矢量求和以产生合成输出; 基于表示所述语音信号的多个参数来计算第一反射系数; 将第一反射系数乘以因子以产生倾斜因子; 以及基于编码比特率将所述倾斜因子应用于所述合成输出。
    • 10. 发明申请
    • Noise Energy Controlling In Noise Reduction System With Two Microphones
    • 具有两个麦克风的降噪系统噪声能量控制
    • US20150319528A1
    • 2015-11-05
    • US14702688
    • 2015-05-02
    • Yang Gao
    • Yang Gao
    • H04R3/00
    • H04R3/005G10K11/178H04R3/002H04R5/04H04R2201/403H04R2410/01
    • In accordance with an embodiment of the present invention, a noise reduction method for speech processing includes cancelling or reducing noise/interference component signal in speech signal enhancement processing, the method comprising estimating the noise/interference component signal by subtracting voice component signal from a first microphone input signal wherein the voice component signal is evaluated as a first replica signal produced by passing a second microphone input signal through a first adaptive filter. Energy variation of the noise/interference component signal is adjusted based on noise stability detection and/or energy explosion detection, wherein the energy of the noise/interference component signal is reduced or smoothed in voice area or energy explosion area if the stable noise is detected and/or the energy explosion is detected. A noise/interference reduced signal is outputted by subtracting a second replica signal from the target signal, wherein the second replica signal is produced by passing the adjusted noise/interference component signal through a second adaptive filter.
    • 根据本发明的实施例,用于语音处理的噪声降低方法包括:消除或减少语音信号增强处理中的噪声/干扰分量信号,所述方法包括:通过从第一信号中减去语音分量信号来估计噪声/干扰分量信号 麦克风输入信号,其中语音分量信号被评估为通过使第二麦克风输入信号通过第一自适应滤波器而产生的第一复制信号。 基于噪声稳定性检测和/或能量爆炸检测来调整噪声/干扰分量信号的能量变化,其中如果检测到稳定的噪声,噪声/干扰分量信号的能量在话音区域或能量爆炸区域被减少或平滑 和/或检测到能量爆炸。 通过从目标信号中减去第二副本信号来输出噪声/干扰减小信号,其中通过使调整的噪声/干扰分量信号通过第二自适应滤波器来产生第二复制信号。