公开(公告)号：US20140233723A1

公开(公告)日：2014-08-21

申请号：US14351225

申请日：2013-05-30

Applicant: Goertek, Inc.

Inventor： Shasha Lou ,  Bo Li ,  Xiaojie Wu

IPC: H04M9/08

CPC classification number: H04M9/082 ,  G10L21/02

Abstract: Disclosed in the invention is a method and system for sampling rate mismatch correction of transmitting and receiving terminals, which can obtain a high-precision sampling rate mismatch in real time, carry out sampling rate correction on transmitting and receiving terminal signals, and send the transmitting terminal signal and the receiving terminal signal that have the same sampling rate after corrected to an echo cancellation system to carry out echo cancellation. The present invention can improve the quality of echo cancellation, simplify the computation and reduce the cost. The method for sampling rate mismatch correction of transmitting and receiving terminals provided in the embodiments of the invention comprises: calculating a transfer function of a receiving terminal signal relative to a transmitting terminal signal at each sampling timing according to the transmitting and receiving terminal signals; obtaining a transmission time delay of the transmitting and receiving terminals at each sampling timing using the transfer function; obtaining a sampling rate mismatch of the transmitting and receiving terminals at each sampling timing by means of parameter fitting using the transmission time delay and the linear relationship between the transmission time delay and the sampling rate mismatch; and adjusting the sampling rate of the transmitting terminal signal or the receiving terminal signal at each sampling timing according to the sampling rate mismatch.

Abstract translation: 本发明公开了一种发送和接收终端采样速率失配校正的方法和系统，其可以实时获得高精度采样率失配，对发送和接收终端信号进行采样率校正，并发送 终端信号和接收终端信号，其在校正到回波消除系统之后具有相同的采样率，以执行回声消除。 本发明可以提高回声消除的质量，简化计算并降低成本。 本发明实施例提供的发送和接收终端的采样率失配校正方法包括：根据发送和接收终端信号，在每个采样定时根据发送终端信号计算接收终端信号的传递函数; 使用传递函数在每个采样定时获得发送和接收终端的传输时间延迟; 通过使用传输时间延迟和传输时间延迟与采样率失配之间的线性关系的参数拟合，在每个采样定时获得发射和接收终端的采样率失配; 并且根据采样率不匹配在每个采样定时调整发送终端信号或接收终端信号的采样率。

公开(公告)号：US09269369B2

公开(公告)日：2016-02-23

申请号：US14407610

申请日：2013-04-01

Applicant: Goertek, Inc.

Inventor： Shasha Lou ,  Xiaojie Wu ,  Bo Li

IPC: G10L21/0208

CPC classification number: G10L21/0208 ,  G10L2021/02082

Abstract: The present invention relates to a method and device for dereverberation of single-channel speech. The method includes the following steps of framing an input single channel speech signal, and processing the frame signals as follows according to a time sequence: performing short-time Fourier transform on a current frame to obtain a power spectrum and a phase spectrum of the current frame; selecting several frames previous to the current frame and having a distance from the current frame within a set duration range, and performing linear superposition on the power spectra of these frames to estimate the power spectrum of a late reflection sound of the current frame; removing the estimated power spectrum of the late reflection sound of the current frame from the power spectrum of the current frame by a spectral subtraction method to obtain the power spectra of a direct sound and an early reflection sound of the current frame; and performing inverse short-time Fourier transform on the power spectra of the direct sound and the early reflection sound of the current frame and the phase spectrum of the current frame together to obtain a signal of the current frame after dereverberation. The dereverberation method and device can solve the problem that the estimation of a transfer function of a reverberation environment or the estimation of reverberation time is difficult in the dereverberation of single-channel speech.

Abstract translation: 本发明涉及一种用于单声道语音混响的方法和装置。 该方法包括以下步骤：根据时序对帧输入单声道语音信号进行成帧处理，如下：对当前帧执行短时傅里叶变换，获得当前的功率谱和相位谱 帧; 选择当前帧之前的几帧，并且在设定的持续时间范围内与当前帧有距离，并对这些帧的功率谱进行线性叠加，以估计当前帧的后期反射声的功率谱; 通过频谱相减法从当前帧的功率谱中去除当前帧的后期反射声的估计功率谱，以获得当前帧的直接声音和早期反射声的功率谱; 并对当前帧的直接声音和早期反射声音的功率谱和当前帧的相位频谱进行逆时空傅里叶变换，以获得混响后的当前帧的信号。 去混响方法和装置可以解决在单声道语音的混响中难以估计混响环境的传递函数的估计或混响时间的估计的问题。

公开(公告)号：US09065896B2

公开(公告)日：2015-06-23

申请号：US14351225

申请日：2013-05-30

Applicant: Goertek, Inc.

Inventor： Shasha Lou ,  Bo Li ,  Xiaojie Wu

IPC: H04J1/16 ,  H04M9/08 ,  G10L21/02 ,  H04L12/28

CPC classification number: H04M9/082 ,  G10L21/02

Abstract: Disclosed in the invention is a method and system for sampling rate mismatch correction of transmitting and receiving terminals, which can obtain a high-precision sampling rate mismatch in real time, carry out sampling rate correction on transmitting and receiving terminal signals, and send the transmitting terminal signal and the receiving terminal signal that have the same sampling rate after corrected to an echo cancellation system to carry out echo cancellation. The present invention can improve the quality of echo cancellation, simplify the computation and reduce the cost. The method for sampling rate mismatch correction of transmitting and receiving terminals provided in the embodiments of the invention comprises: calculating a transfer function of a receiving terminal signal relative to a transmitting terminal signal at each sampling timing according to the transmitting and receiving terminal signals; obtaining a transmission time delay of the transmitting and receiving terminals at each sampling timing using the transfer function; obtaining a sampling rate mismatch of the transmitting and receiving terminals at each sampling timing by means of parameter fitting using the transmission time delay and the linear relationship between the transmission time delay and the sampling rate mismatch; and adjusting the sampling rate of the transmitting terminal signal or the receiving terminal signal at each sampling timing according to the sampling rate mismatch.

Abstract translation: 本发明公开了一种发送和接收终端采样速率失配校正的方法和系统，其可以实时获得高精度采样率失配，对发送和接收终端信号进行采样率校正，并发送发送 终端信号和接收终端信号，其在校正到回波消除系统之后具有相同的采样率，以执行回声消除。 本发明可以提高回声消除的质量，简化计算并降低成本。 本发明实施例提供的发送和接收终端的采样率失配校正方法包括：根据发送和接收终端信号，在每个采样定时根据发送终端信号计算接收终端信号的传递函数; 使用传递函数在每个采样定时获得发送和接收终端的传输时间延迟; 通过使用传输时间延迟和传输时间延迟与采样率失配之间的线性关系的参数拟合，在每个采样定时获得发射和接收终端的采样率失配; 并且根据采样率不匹配在每个采样定时调整发送终端信号或接收终端信号的采样率。

公开(公告)号：US20150149160A1

公开(公告)日：2015-05-28

申请号：US14407610

申请日：2013-04-01

Applicant: Goertek, Inc.

Inventor： Shasha Lou ,  Xiaojie Wu ,  Bo Li

IPC: G10L21/0208

CPC classification number: G10L21/0208 ,  G10L2021/02082

Abstract: The present invention relates to a method and device for dereverberation of single-channel speech. The method includes the following steps of framing an input single channel speech signal, and processing the frame signals as follows according to a time sequence: performing short-time Fourier transform on a current frame to obtain a power spectrum and a phase spectrum of the current frame; selecting several frames previous to the current frame and having a distance from the current frame within a set duration range, and performing linear superposition on the power spectra of these frames to estimate the power spectrum of a late reflection sound of the current frame; removing the estimated power spectrum of the late reflection sound of the current frame from the power spectrum of the current frame by a spectral subtraction method to obtain the power spectra of a direct sound and an early reflection sound of the current frame; and performing inverse short-time Fourier transform on the power spectra of the direct sound and the early reflection sound of the current frame and the phase spectrum of the current frame together to obtain a signal of the current frame after dereverberation. The dereverberation method and device can solve the problem that the estimation of a transfer function of a reverberation environment or the estimation of reverberation time is difficult in the dereverberation of single-channel speech.

Abstract translation: 本发明涉及一种用于单声道语音混响的方法和装置。 该方法包括以下步骤：根据时序对帧输入单声道语音信号进行成帧处理，如下：对当前帧执行短时傅里叶变换，获得当前的功率谱和相位谱 帧; 选择当前帧之前的几帧，并且在设定的持续时间范围内与当前帧有距离，并对这些帧的功率谱进行线性叠加，以估计当前帧的后期反射声的功率谱; 通过频谱相减法从当前帧的功率谱中去除当前帧的后期反射声的估计功率谱，以获得当前帧的直接声音和早期反射声的功率谱; 并对当前帧的直接声音和早期反射声音的功率谱和当前帧的相位频谱进行逆时空傅里叶变换，以获得混响后的当前帧的信号。 去混响方法和装置可以解决在单声道语音的混响中难以估计混响环境的传递函数的估计或混响时间的估计的问题。