公开(公告)号：US08380253B2

公开(公告)日：2013-02-19

申请号：US12032589

申请日：2008-02-15

申请人： Qin Li ,  Chao He

发明人： Qin Li ,  Chao He

IPC分类号： H04B3/20

CPC分类号： H04M9/082

摘要： A voice communication end device performs quality checks to determine whether acoustic echo cancellation would be ineffective, such as due to noise or clock drift or discontinuities between incoming and outgoing voice channels. In the case where echo cancellation would prove ineffective, the device falls back on a tri-state voice switching operation that includes a bi-direction state in which both channels are on in full duplex operation, which provides a smoother transition switching between active channels. The tri-state voice switching supports both voluntary transitions where the active user voluntarily stops to yield the active channel, and forced transitions where the active user is forcedly interrupted by the other user speaking more loudly.

公开(公告)号：US20120249959A1

公开(公告)日：2012-10-04

申请号：US13436991

申请日：2012-04-01

申请人： Jia You ,  Qin Li ,  Zhenhua Guo ,  Qiang Sun ,  Chun Li

发明人： Jia You ,  Qin Li ,  Zhenhua Guo ,  Qiang Sun ,  Chun Li

IPC分类号： A61B3/12

CPC分类号： A61B3/12 ,  G06K9/00597 ,  G06K9/0061 ,  G06K9/36 ,  G06K9/46 ,  G06K9/4609 ,  G06K9/4652

摘要： A fundus camera using infrared light sources, which included an imaging optical path and an optical path for focusing and positioning and two optical paths share a common set of retina objective lens, and a computer-assisted method for retinal vessel segmentation in general and diabetic retinopathy (DR) image segmentation in particular. The method is primarily based on Multiscale Production of the Matched Filter (MPMF) scheme, which together the fundus camera, is useful for non-invasive diabetic retinopathy detection and monitoring.

摘要翻译： 使用红外光源的眼底照相机，其包括成像光路和用于聚焦和定位的光路，以及两个光路共享一组共同的视网膜物镜，以及用于视网膜血管分割的计算机辅助方法和糖尿病性视网膜病变 （DR）图像分割。 该方法主要基于多尺度生产匹配滤波器（MPMF）方案，该方案一起使用眼底照相机，可用于非侵入性糖尿病视网膜病变检测和监测。

公开(公告)号：US08213635B2

公开(公告)日：2012-07-03

申请号：US12328789

申请日：2008-12-05

申请人： Qin Li ,  Michael Lewis Seltzer ,  Chao He

发明人： Qin Li ,  Michael Lewis Seltzer ,  Chao He

IPC分类号： H04B15/00 ,  G10L11/06

CPC分类号： G10L21/0208 ,  G10L21/0232

摘要： An audio signal is received that might include keyboard noise and speech. The audio signal is digitized and transformed from a time domain to a frequency domain. The transformed audio is analyzed to determine whether there is likelihood that keystroke noise is present. If it is determined there is high likelihood that the audio signal contains keystroke noise, a determination is made as to whether a keyboard event occurred around the time of the likely keystroke noise. If it is determined that a keyboard event occurred around the time of the likely keystroke noise, a determination is made as to whether speech is present in the audio signal around the time of the likely keystroke noise. If no speech is present, the keystroke noise is suppressed in the audio signal. If speech is detected in the audio signal or if the keystroke noise abates, the suppression gain is removed from the audio signal.

摘要翻译： 接收到可能包括键盘噪音和语音的音频信号。 音频信号被数字化并从时域变换到频域。 分析变换的音频以确定是否存在按键噪声的可能性。 如果确定音频信号包含击键噪声的可能性很高，则确定在可能的击键噪声的时间周围是否发生键盘事件。 如果确定在可能的击键噪声的时间周围发生键盘事件，则确定在可能的击键噪声的时间周围的音频信号中是否存在语音。 如果不存在语音，则在音频信号中抑制击键噪声。 如果在音频信号中检测到语音，或者如果击键噪声消失，则从音频信号中去除抑制增益。

公开(公告)号：US07764634B2

公开(公告)日：2010-07-27

申请号：US11275414

申请日：2005-12-29

申请人： Wei Zhong ,  Chao He ,  Anton W. Krantz ,  Qin Li

发明人： Wei Zhong ,  Chao He ,  Anton W. Krantz ,  Qin Li

IPC分类号： H04B3/20

CPC分类号： H04M9/08 ,  H04M1/20 ,  H04M1/2535 ,  H04M1/6033 ,  H04M9/082

摘要： Suppressing one or more frequency ranges of a signal prevents the occurrence of feedback in a voice data communications application. A system recognizes a frequency range in a signal where feedback occurs, or anticipates a frequency range where feedback is anticipated. The signal includes a signal the input system generates or that the output system renders. The system suppresses the signal in the frequency range by disregarding one or more sampling bits representing the frequency range, or by applying one or more filters to attenuate or eliminate the signal in the frequency range. The system may monitor the signal to identify feedback resulting in different or additional frequency ranges and suppress the signal in the different or additional frequency ranges to prevent feedback from occurring.

摘要翻译： 抑制信号的一个或多个频率范围阻止语音数据通信应用中的反馈的发生。 系统识别发生反馈的信号中的频率范围，或者预期预期反馈的频率范围。 信号包括输入系统产生的信号或输出系统呈现的信号。 该系统通过忽略表示频率范围的一个或多个采样位，或通过施加一个或多个滤波器来衰减或消除频率范围内的信号来抑制频率范围内的信号。 该系统可以监视信号以识别导致不同或附加频率范围的反馈，并且抑制不同或附加频率范围内的信号以防止发生反馈。

公开(公告)号：US20080247535A1

公开(公告)日：2008-10-09

申请号：US11784692

申请日：2007-04-09

申请人： Qin Li ,  Chao He

发明人： Qin Li ,  Chao He

IPC分类号： H04M9/08

CPC分类号： H04M9/082 ,  H04L1/0025 ,  H04L1/0026

摘要： A method is provided for reducing the adverse impact of echo on audio quality in a two-communication system. The method includes two parts. The first part begins by detecting non-linear effects (e.g. clippings and audio glitches). If a non-linear effect is detected, the system temporarily disables adaptation of the adaptive filter. In this way, filter coefficients obtained before the non-linear effect happens will not be corrupted, so the AEC can quickly recover from the non-linear effects. The second part begins by monitoring a parameter reflecting signal quality (e.g., ERLE). If the signal quality parameter falls below a given value the system switches from a full-duplex mode of operation to a half-duplex mode of operation. In this way, when a non-linear effect that is undetectable or occurs repeatedly (e.g., speaker volume changes) and which can corrupt an acoustic echo canceller (AEC) for a relatively long period of time, the system switches from full-duplex operation to half-duplex operation. In half-duplex operation, communication can only happen in one direction at a time, and thus the echo path is broken, effectively eliminating echoes. When the non-linear effect is no longer present and the quality parameter rises to a normal level, communication returns to a full-duplex mode of operation and the AEC once again removes the echoes.

摘要翻译： 提供一种用于减少回声对双通信系统中音频质量的不利影响的方法。 该方法包括两部分。 第一部分通过检测非线性效果（例如剪辑和音频毛刺）开始。 如果检测到非线性效应，则系统暂时禁用自适应滤波器的自适应。 以这种方式，在非线性效应发生之前获得的滤波器系数不会被破坏，因此AEC可以从非线性效应快速恢复。 第二部分通过监视反映信号质量的参数（例如，ERLE）开始。 如果信号质量参数低于给定值，系统将从全双工工作模式切换到半双工工作模式。 以这种方式，当一个不可检测的或重复发生的非线性效应（例如，扬声器音量变化）并且可以在相对长的时间段内损坏声学回声消除器（AEC）时，系统从全双工操作切换 进行半双工操作。 在半双工操作中，通信只能一次在一个方向发生，因此回波路径被破坏，有效地消除了回波。 当非线性效应不再存在并且质量参数上升到正常水平时，通信返回到全双工操作模式，并且AEC再次移除回波。

公开(公告)号：US20070263849A1

公开(公告)日：2007-11-15

申请号：US11413710

申请日：2006-04-28

申请人： Jack Stokes ,  Chao He ,  Qin Li

发明人： Jack Stokes ,  Chao He ,  Qin Li

IPC分类号： H04M9/08

CPC分类号： H04M9/082

摘要： Center clipping is applied with acoustic echo suppression in a two-way voice communication system to reduce a microphone signal to the background noise floor when speech is not present. For integration with a microphone array, the center clipping processing determines whether speech is present based on estimates of the overall leak through and instantaneous microphone power across the microphone array channels. The overall estimates can be calculated as a dot product of the microphone array coefficients computed by a sound source localization process and separate estimates for the respective microphone channel.

摘要翻译： 在双向语音通信系统中，中心限幅被应用于声学回声抑制，以在不存在语音时将麦克风信号减小到背景噪声底层。 为了与麦克风阵列集成，基于麦克风阵列通道上的总泄漏和瞬时麦克风功率的估计，中心削波处理确定语音是否存在。 可以将总体估计值计算为由声源定位处理计算的麦克风阵列系数和各个麦克风通​​道的单独估计的点乘积。

公开(公告)号：US20070165838A1

公开(公告)日：2007-07-19

申请号：US11332500

申请日：2006-01-13

申请人： Qin Li ,  Chao He ,  Wei-Ge Chen ,  Mu Han

发明人： Qin Li ,  Chao He ,  Wei-Ge Chen ,  Mu Han

IPC分类号： A61F11/06 ,  H04M9/08 ,  G10K11/16 ,  H03B29/00

CPC分类号： H04M9/082

摘要： The quality and robustness of audio echo cancellation is enhanced by selectively applying glitch recovery processes based on a quality measurement of the relative offset between capture and render audio streams. For example, large and small glitch detection is enabled for low relative offset variance; large glitch detection is enabled in a medium range of relative offset variance; and neither enabled at high variance. Further, a fast glitch recovery process suspends updating the adaptive filter coefficients of the audio echo cancellation while buffers are re-aligned to recover from the glitch, so as to avoid resetting the adaptive filter. When clock drift exists between capture and render audio streams, a multi-step compensation method is applied to improve AEC output quality in case the drifting rate is low; and a resampler is used to compensate the drift in case the drifting rate is high. An anti-clipping process detects clipping of the signals, and also suspends adaptive filter updating during clipping.

摘要翻译： 通过基于捕获和渲染音频流之间的相对偏移的质量测量来选择性地应用毛刺恢复过程来增强音频回声消除的质量和鲁棒性。 例如，对于低相对偏移方差，启用大的和小的毛刺检测; 在相对偏移方差的中等范围内启用大毛刺检测; 并且在高方差时都不启用。 此外，快速毛刺恢复处理暂停更新音频回声消除的自适应滤波器系数，同时缓冲器被重新对准以从毛刺恢复，以避免复位自适应滤波器。 当捕获和渲染音频流之间存在时钟漂移时，应用多步补偿方法来提高漂移率低的AEC输出质量; 并且在漂移速率高的情况下使用重采样器来补偿漂移。 反剪辑过程检测信号的剪辑，并且还可以在剪辑期间暂停自适应滤波器更新。

公开(公告)号：US09225728B2

公开(公告)日：2015-12-29

申请号：US13884749

申请日：2011-06-24

申请人： Zhiqiang Du ,  Manxia Tie ,  Xiaolong Lai ,  Qin Li

发明人： Zhiqiang Du ,  Manxia Tie ,  Xiaolong Lai ,  Qin Li

IPC分类号： H04L29/06 ,  H04L9/32

CPC分类号： H04L63/12 ,  H04L9/3255 ,  H04L63/0407 ,  H04L63/08 ,  H04L63/0853

摘要： The present invention discloses a method for anonymous entity identification, which comprises the following steps: an entity A transmits an RA and an IGA to an entity B; the entity B returns an RB, an IGB and a TokenBA to the entity A; the entity A sends an RA′, the RB, the IGA and the IGB to a credible third-party TP; the credible third-party TP checks the validity of a first group and a second group according to the IGA and the IGB; the credible third-party TP returns an RESGA, an RESGB, and a TokenTA to the entity A, or returns the RESGA, the RESGA, a TokenTA1 and a TokenTA2 to the entity A; and the entity A performs a verification after receiving them; the entity A sends a TokenAB to the entity B; and the entity B performs the verification after receiving it. In the present invention, there is no need to send the identity information of the entity to be identified to an opposite terminal, so that anonymous identity identification is realized.

摘要翻译： 本发明公开了一种匿名实体识别方法，包括以下步骤：实体A向实体B发送RA和IGA; 实体B向实体A返回RB，IGB和TokenBA; 实体A将RA'，RB，IGA和IGB发送到可信的第三方TP; 可靠的第三方TP根据IGA和IGB检查第一组和第二组的有效性; 可信第三方TP向实体A返回RESGA，RESGB和TokenTA，或将RESGA，RESGA，TokenTA1和TokenTA2返回给实体A; 实体A在接收到验证后进行验证; 实体A向实体B发送TokenAB; 并且实体B在接收到该验证之后执行验证。 在本发明中，不需要将要识别的实体的身份信息发送到对方终端，从而实现匿名身份识别。

公开(公告)号：US09137259B2

公开(公告)日：2015-09-15

申请号：US13702785

申请日：2011-01-14

申请人： Qin Li ,  Jun Cao ,  Manxia Tie ,  Zhenhai Huang

发明人： Qin Li ,  Jun Cao ,  Manxia Tie ,  Zhenhai Huang

IPC分类号： H04L29/06 ,  H04L12/721

CPC分类号： H04L63/1475 ,  H04L45/26

摘要： A switch route exploring method, system and device are provided in the present invention. The method comprises that: a transmitting source node NSource constructs a switch route exploring request packet and transmits it to a destination node NDestination; the switch route exploring request packet comprises information of switch route from the transmitting source node NSource to the destination node NDestination, wherein the information is known by the transmitting source node NSource; and the destination node NDestination constructs a switch route exploring response packet and transmits it to the transmitting source node NSource.

摘要翻译： 在本发明中提供了一种开关路径探索方法，系统和装置。 该方法包括：发送源节点NSource构建探索请求分组的交换路由，并将其发送到目的节点NDestination; 所述交换路由探索请求分组包括从所述发送源节点NSource到所述目的节点NDestination的切换路由的信息，其中，所述信息由所述发送源节点NSource知道; 并且目的地节点NDestination构建探索响应分组的交换机路由，并将其发送到发送源节点NSource。

公开(公告)号：US09089288B2

公开(公告)日：2015-07-28

申请号：US13436991

申请日：2012-04-01

申请人： Jia You ,  Qin Li ,  Zhenhua Guo ,  Qiang Sun ,  Chun Li

发明人： Jia You ,  Qin Li ,  Zhenhua Guo ,  Qiang Sun ,  Chun Li

IPC分类号： G06K9/00 ,  A61B3/12 ,  G06K9/46 ,  G06T7/00 ,  G06K9/36

CPC分类号： A61B3/12 ,  G06K9/00597 ,  G06K9/0061 ,  G06K9/36 ,  G06K9/46 ,  G06K9/4609 ,  G06K9/4652

摘要： A fundus camera using infrared light sources, which included an imaging optical path and an optical path for focusing and positioning and two optical paths share a common set of retina objective lens, and a computer-assisted method for retinal vessel segmentation in general and diabetic retinopathy (DR) image segmentation in particular. The method is primarily based on Multiscale Production of the Matched Filter (MPMF) scheme, which together the fundus camera, is useful for non-invasive diabetic retinopathy detection and monitoring.

摘要翻译： 使用红外光源的眼底照相机，其包括成像光路和用于聚焦和定位的光路，以及两个光路共享一组共同的视网膜物镜，以及用于视网膜血管分割的计算机辅助方法和糖尿病性视网膜病变 （DR）图像分割。 该方法主要基于多尺度生产匹配滤波器（MPMF）方案，该方案一起使用眼底照相机，可用于非侵入性糖尿病视网膜病变检测和监测。