公开(公告)号：US09548063B2

公开(公告)日：2017-01-17

申请号：US14382864

申请日：2013-03-21

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Dong Shi ,  JiaQuan Huo ,  Xuejing Sun ,  Glenn N. Dickins

IPC: H04B3/20 ,  G10L21/0208 ,  G10L21/02 ,  G10L25/12

CPC classification number: G10L21/0208 ,  G10L21/02 ,  G10L25/12 ,  G10L2021/02082

Abstract: Embodiments of method and apparatus for acoustic echo control are described. According to the method, an echo energy-based doubletalk detection is performed to determine whether there is a doubletalk in a microphone signal with reference to a loudspeaker signal. A spectral similarity between spectra of the microphone signal and the loudspeaker signal is calculated. It is determined that there is no doubletalk in the microphone signal if the spectral similarity is higher than a threshold level. Adaption of an adaptive filter for applying acoustic echo cancellation or acoustic echo suppression on the microphone signal is enabled if it is determined that there is no doubletalk in the microphone signal through the echo energy-based doubletalk detection, or there is no doubletalk through the spectral similarity-based doubletalk detection.

Abstract translation: 描述了用于声学回声控制的方法和装置的实施例。 根据该方法，执行基于回波能量的双重检测，以确定麦克风信号中是否存在参考扬声器信号的双音节。 计算麦克风信号和扬声器信号的频谱之间的频谱相似度。 如果频谱相似度高于阈值电平，则确定麦克风信号中没有双音节。 如果通过基于回波能量的双重检测确定了麦克风信号中没有双重位，或者通过光谱没有双重反馈，则可以使用适用于对麦克风信号进行声学回声消除或声学回声抑制的自适应滤波器 基于相似度的双标检测。

公开(公告)号：US20150023514A1

公开(公告)日：2015-01-22

申请号：US14382864

申请日：2013-03-21

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： Dong Shi ,  JiaQuan Huo ,  Xuejing Sun ,  Glenn N. Dickins

IPC: G10L21/0208

CPC classification number: G10L21/0208 ,  G10L21/02 ,  G10L25/12 ,  G10L2021/02082

Abstract: Embodiments of method and apparatus for acoustic echo control are described. According to the method, an echo energy-based doubletalk detection is performed to determine whether there is a doubletalk in a microphone signal with reference to a loudspeaker signal. A spectral similarity between spectra of the microphone signal and the loudspeaker signal is calculated. It is determined that there is no doubletalk in the microphone signal if the spectral similarity is higher than a threshold level. Adaption of an adaptive filter for applying acoustic echo cancellation or acoustic echo suppression on the microphone signal is enabled if it is determined that there is no doubletalk in the microphone signal through the echo energy-based doubletalk detection, or there is no doubletalk through the spectral similarity-based doubletalk detection.

Abstract translation: 描述了用于声学回声控制的方法和装置的实施例。 根据该方法，执行基于回波能量的双重检测，以确定麦克风信号中是否存在参考扬声器信号的双音节。 计算麦克风信号和扬声器信号的频谱之间的频谱相似度。 如果频谱相似度高于阈值电平，则确定麦克风信号中没有双音节。 如果通过基于回波能量的双重检测确定了麦克风信号中没有双重位，或者通过光谱没有双重反馈，则可以使用适用于对麦克风信号进行声学回声消除或声学回声抑制的自适应滤波器 基于相似度的双标检测。

公开(公告)号：US10601689B2

公开(公告)日：2020-03-24

申请号：US15763623

申请日：2016-09-27

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Xuejing Sun ,  JiaQuan Huo ,  Paul Holmberg

IPC: H04L12/841 ,  H04L12/853 ,  H04L12/26 ,  H04M7/00

Abstract: In a packet switched voice delivery application which utilizes a jitter buffer for the delivery of sequential packet data, a method of determining a measure of the output jitter of taking packets out of the buffer, the method including the step of: (a) forming a pull jitter measure comprising the differential fetch times between sequential pull packets dived by an expected time interval between packets.

公开(公告)号：US10103999B2

公开(公告)日：2018-10-16

申请号：US15125564

申请日：2015-04-08

Applicant: DOLBY LABORATORIES LICENSING CORPORATION

Inventor： JiaQuan Huo ,  Xuejing Sun ,  Kai Li

IPC: H04L12/841 ,  H04J3/06 ,  H04L12/26 ,  H04L12/835

Abstract: Some implementations involve controlling a jitter buffer size during a teleconference according to a jitter buffer size estimation algorithm based, at least in part, on a cumulative distribution function (CDF). The CDF may be based, at least in part, on a network jitter parameter. The CDF may be initialized according to a parametric model. At least one parameter of the parametric model may be based, at least in part, on legacy network jitter information.

公开(公告)号：US20180287910A1

公开(公告)日：2018-10-04

申请号：US15763623

申请日：2016-09-27

Applicant: Dolby Laboratories Licensing Corporation

Inventor： Xuejing Sun ,  JiaQuan Huo ,  Paul Holmberg

IPC: H04L12/26 ,  H04L12/841

CPC classification number: H04L43/087 ,  H04L43/16 ,  H04L47/2416 ,  H04L47/283 ,  H04M7/006

Abstract: In a packet switched voice delivery application which utilizes a jitter buffer for the delivery of sequential packet data, a method of determining a measure of the output jitter of taking packets out of the buffer, the method including the step of: (a) forming a pull jitter measure comprising the differential fetch times between sequential pull packets dived by an expected time interval between packets.