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1. 发明授权

US08204209B2 Full duplex hands-free telephone system 有权
标题翻译：全双工免提电话系统
公开(公告)号：US08204209B2
公开(公告)日：2012-06-19
申请号：US12044054
申请日：2008-03-07
申请人： Qing-Guang Liu , Wilson Or , Long Tran , Victor Mei
发明人： Qing-Guang Liu , Wilson Or , Long Tran , Victor Mei
IPC分类号： H04M9/08
CPC分类号： H04M1/6033
摘要： A telephone system comprising an analog telephone and a full-duplex speakerphone adapter is disclosed. The analog telephone comprises an ordinary analog telephone subscriber circuit for transmitting and receiving analog signals and a handset for users. The full-duplex speakerphone adapter is coupled between the analog telephone and a central office, uses a subscriber loop interface circuit through the first telephone line to couple to the ordinary analog telephone subscriber circuit of the analog telephone and uses a telephone hybrid interface circuit through the second telephone line to couple to a wall jack to communicate with the central office.
摘要翻译：公开了一种包括模拟电话和全双工扬声器电话适配器的电话系统。模拟电话包括用于发送和接收模拟信号的普通模拟电话用户电路以及用户的手机。全双工扬声器适配器耦合在模拟电话和中心局之间，通过第一条电话线路使用用户环路接口电路耦合到模拟电话的普通模拟电话用户电路，并通过电话混合接口电路第二条电话线连接到墙壁千斤顶与中心局进行通信。

2. 发明授权

US08194850B2 Method and apparatus for voice communication 有权
标题翻译：用于语音通信的方法和装置
公开(公告)号：US08194850B2
公开(公告)日：2012-06-05
申请号：US12044041
申请日：2008-03-07
申请人： Qing-Guang Liu , Wilson Or
发明人： Qing-Guang Liu , Wilson Or
IPC分类号： H04M9/08
CPC分类号： H04M9/08
摘要： A voice communication device with an integrated framework structure for echo cancellation and noise reduction is disclosed. A microphone receives a local input signal while a speaker is outputting a local output signal. The local input signal and output signal are all decomposed into a plurality of subband signals by filter banks for conducting individual processing of echo cancellation and noise reduction per subband. The subband echo canceller is followed by a DFT unit to split the cancellation result into a plurality of narrow frequency bins whereby the noise reduction is performed. The noise reduction results are recombined by an IDFT unit for residual echo removal in a subband non-linear processor. The final output is obtained from a synthesis filter bank that synthesizes the subband signals after echo cancellation and noise reduction into a full-band signal.
摘要翻译：公开了一种具有用于回波消除和降噪的集成框架结构的语音通信设备。麦克风在扬声器输出本地输出信号时接收本地输入信号。本地输入信号和输出信号都通过滤波器组分解成多个子带信号，用于进行每个子带的回波消除和降噪的单独处理。子带回波消除器之后是DFT单元，以将取消结果分解成多个窄频率频段，由此执行降噪。噪声降低结果由IDFT单元重新组合，用于子带非线性处理器中的残余回波去除。从合成滤波器组获得最终输出，该滤波器组将回波消除和噪声降低之后的子带信号合成为全频带信号。

3. 发明申请

US20080219433A1 FULL DUPLEX HANDS-FREE TELEPHONE SYSTEM 有权
标题翻译：全双工无电话电话系统
公开(公告)号：US20080219433A1
公开(公告)日：2008-09-11
申请号：US12044054
申请日：2008-03-07
申请人： Qing-Guang Liu , Wilson Or , Long Tran , Victor Mei
发明人： Qing-Guang Liu , Wilson Or , Long Tran , Victor Mei
IPC分类号： H04M9/08 , H04M1/02
CPC分类号： H04M1/6033
摘要： A telephone system comprising an analog telephone and a full-duplex speakerphone adapter is disclosed. The analog telephone comprises an ordinary analog telephone subscriber circuit for transmitting and receiving analog signals and a handset for users. The full-duplex speakerphone adapter is coupled between the analog telephone and a central office, uses a subscriber loop interface circuit through the first telephone line to couple to the ordinary analog telephone subscriber circuit of the analog telephone and uses a telephone hybrid interface circuit through the second telephone line to couple to a wall jack to communicate with the central office.
摘要翻译：公开了一种包括模拟电话和全双工扬声器电话适配器的电话系统。模拟电话包括用于发送和接收模拟信号的普通模拟电话用户电路以及用户的手机。全双工扬声器适配器耦合在模拟电话和中心局之间，通过第一条电话线路使用用户环路接口电路耦合到模拟电话的普通模拟电话用户电路，并通过电话混合接口电路第二条电话线连接到墙壁千斤顶与中心局进行通信。

4. 发明授权

US08275142B2 Acoustic echo cancellation system 有权
标题翻译：声回声消除系统
公开(公告)号：US08275142B2
公开(公告)日：2012-09-25
申请号：US12044048
申请日：2008-03-07
申请人： Qing-Guang Liu , Wilson Or
发明人： Qing-Guang Liu , Wilson Or
IPC分类号： H03B29/00 , H04B3/20 , H04B15/00 , H04M9/08
CPC分类号： H04M9/082
摘要： An embodiment of an acoustic echo cancellation system is disclosed. The system comprises an echo cancellation unit, a second filter and a subtraction unit. The echo cancellation unit comprises a first attenuator, a first filter and a first subtractor. The first attenuator has a first down-scaling factor for attenuating a first signal. The first filter generates a first echo signal estimate based on the attenuated first signal. The first subtractor generates a third signal by subtracting the first echo signal estimate from a second signal. The second filter generates a second echo signal estimate based on the first signal. The subtraction unit subtracts the second echo signal estimate from the third signal.
摘要翻译：公开了一种声学回声消除系统的实施例。该系统包括回波消除单元，第二滤波器和减法单元。回波消除单元包括第一衰减器，第一滤波器和第一减法器。第一衰减器具有用于衰减第一信号的第一降档因子。第一滤波器基于衰减的第一信号产生第一回波信号估计。第一减法器通过从第二信号中减去第一回波信号估计来产生第三信号。第二滤波器基于第一信号产生第二回波信号估计。减法单元从第三信号中减去第二回波信号估计。

5. 发明申请

US20080219431A1 METHOD AND APPARATUS FOR ECHO CANCELLATION 审中-公开
标题翻译： ECHO CANCELLATION的方法和装置
公开(公告)号：US20080219431A1
公开(公告)日：2008-09-11
申请号：US12044070
申请日：2008-03-07
申请人： Qing-Guang Liu , Wilson Or
发明人： Qing-Guang Liu , Wilson Or
IPC分类号： H04M9/08 , H04B3/20
CPC分类号： H04M9/082 , H04B3/23
摘要： A telephony system equipped with an echo cancellation module is disclosed. A hybrid interface circuit outputs an outbound signal to a wall jack while receiving an inbound signal from the wall jack. The inbound signal may contain a line echo of the outbound signal caused by the impedance mismatches in the hybrid interface circuit. A line echo canceller containing an adaptive filter is used to cancel the line echo in the inbound signal based on the learned line echo path characteristics captured in the training period. During a brief period after the telephony system is activated, the line echo canceller enters into a calibration mode wherein its adaptive filter is trained to learn the line echo path characteristics. During the calibration mode, the line echo canceller generates a calibration signal as the outbound signal and receives the line echo from the hybrid interface circuit to perform learning of the line echo path characteristics.
摘要翻译：公开了配备有回波消除模块的电话系统。混合接口电路在从墙壁插座接收入站信号的同时向墙壁插座输出出站信号。入站信号可能包含由混合接口电路中的阻抗不匹配引起的出站信号的线路回声。使用包含自适应滤波器的线路回声消除器，用于基于在训练周期中捕获的学习线路回波路径特征来消除入站信号中的线路回波。在电话系统启动后的短暂时间内，线路回波消除器进入校准模式，其中训练其自适应滤波器以学习线路回波路径特性。在校准模式期间，线路回波消除器产生校准信号作为出站信号，并从混合接口电路接收线路回声，以执行线路回声路径特性的学习。

6. 发明授权

US5274714A Method and apparatus for determining and organizing feature vectors for neural network recognition 失效
标题翻译：用于确定和组织用于神经网络识别的特征向量的方法和装置
公开(公告)号：US5274714A
公开(公告)日：1993-12-28
申请号：US920188
申请日：1992-07-23
申请人： Timothy L. Hutcheson , Wilson Or , Venkatesh Narayanan , Subramaniam Mohan , Peter G. Wohlmut , Ramanujam Srinivasan , Bobby R. Hunt , Thomas W. Ryan
发明人： Timothy L. Hutcheson , Wilson Or , Venkatesh Narayanan , Subramaniam Mohan , Peter G. Wohlmut , Ramanujam Srinivasan , Bobby R. Hunt , Thomas W. Ryan
IPC分类号： G06K9/00 , G06K9/52 , G06K9/62 , G06K9/66 , G07C9/00 , G06K9/36 , G06K9/46 , G06K9/68
CPC分类号： G06K9/66 , G06K9/00221 , G06K9/00268 , G06K9/522 , G06K9/6217 , G07C9/00071
摘要： A pattern recognition method and apparatus utilizes a neural network to recognize input images which are sufficiently similar to a database of previously stored images. Images are first processed and subjected to a Fourier transform which yields a power spectrum. An in-class to out-of-class study is performed on a typical collection of images in order to determine the most discriminatory regions of the Fourier transform. A feature vector consisting of the (most discriminatory) information from the power spectrum of the Fourier transform of the image is formed. Feature vectors are input to a neural network having preferably two hidden layers, input dimensionality of the number of elements in the feature vector and output dimensionality of the number of data elements stored in the database. Unique identifier numbers are preferably stored along with the feature vector. Application of a query feature vector to the neural network results in an output vector. The output vector is subjected to statistical analysis to determine if a sufficiently high confidence level exists to indicate a successful identification whereupon a unique identifier number may be displayed.
摘要翻译：模式识别方法和装置利用神经网络来识别与先前存储的图像的数据库足够相似的输入图像。首先对图像进行处理，并进行傅里叶变换，从而产生功率谱。为了确定傅里叶变换的最具歧视性的区域，对图像的典型集合执行类外的课外研究。形成由图像的傅立叶变换的功率谱的（最具辨别）信息构成的特征矢量。特征向量被输入到具有优选地两个隐藏层的神经网络，特征向量中的元素数量的输入维数和存储在数据库中的数据元素的数量的输出维数。唯一标识符号优选与特征向量一起存储。将查询特征向量应用于神经网络，得到输出向量。对输出向量进行统计分析以确定是否存在足够高的置信水平以指示成功的标识，从而可以显示唯一的标识符号。

7. 发明授权

US5465308A Pattern recognition system 失效
标题翻译：模式识别系统
公开(公告)号：US5465308A
公开(公告)日：1995-11-07
申请号：US111616
申请日：1993-08-25
申请人： Timothy L. Hutcheson , Wilson Or , Venkatesh Narayanan , Subramaniam Mohan , Peter G. Wohlmut , Ramanujam Srinivasan , Bobby R. Hunt , Thomas W. Ryan
发明人： Timothy L. Hutcheson , Wilson Or , Venkatesh Narayanan , Subramaniam Mohan , Peter G. Wohlmut , Ramanujam Srinivasan , Bobby R. Hunt , Thomas W. Ryan
IPC分类号： G06K9/00 , G06K9/52 , G06K9/62 , G06K9/66 , G07C9/00
CPC分类号： G06K9/66 , G06K9/00221 , G06K9/00268 , G06K9/522 , G06K9/6217 , G07C9/00071
摘要： A method and apparatus under software control for pattern recognition utilizes a neural network implementation to recognize two dimensional input images which are sufficiently similar to a database of previously stored two dimensional images. Images are first image processed and subjected to a Fourier transform which yields a power spectrum. An in-class to out-of-class study is performed on a typical collection of images in order to determine the most discriminatory regions of the Fourier transform. A feature vector consisting of the highest order (most discriminatory) magnitude information from the power spectrum of the Fourier transform of the image is formed. Feature vectors are input to a neural network having preferably two hidden layers, input dimensionality of the number of elements in the feature vector and output dimensionality of the number of data elements stored in the database. Unique identifier numbers are preferably stored along with the feature vector. Application of a query feature vector to the neural network will result in an output vector. The output vector is subjected to statistical analysis to determine if a sufficiently high confidence level exists to indicate that a successful identification has been made. Where a successful identification has occurred, the unique identifier number may be displayed.
摘要翻译：用于模式识别的软件控制下的方法和装置利用神经网络实现来识别与先前存储的二维图像的数据库足够相似的二维输入图像。首先对图像进行图像处理，并进行傅立叶变换，从而产生功率谱。为了确定傅里叶变换的最具歧视性的区域，对图像的典型集合执行类外的课外研究。形成由图像的傅里叶变换的功率谱的最高阶（最具辨别）的幅度信息构成的特征矢量。特征向量被输入到具有优选地两个隐藏层的神经网络，特征向量中的元素数量的输入维数和存储在数据库中的数据元素的数量的输出维数。唯一标识符号优选与特征向量一起存储。将查询特征向量应用于神经网络将导致输出向量。对输出向量进行统计分析以确定是否存在足够高的置信水平以指示已经进行了成功的识别。在发生成功识别的情况下，可以显示唯一标识符号。

8. 发明申请

US20080219463A1 ACOUSTIC ECHO CANCELLATION SYSTEM 有权
标题翻译：声学解除系统
公开(公告)号：US20080219463A1
公开(公告)日：2008-09-11
申请号：US12044048
申请日：2008-03-07
申请人： Qing-Guang Liu , Wilson Or
发明人： Qing-Guang Liu , Wilson Or
IPC分类号： H04B3/20
CPC分类号： H04M9/082
摘要： An embodiment of an acoustic echo cancellation system is disclosed. The system comprises an echo cancellation unit, a second filter and a subtraction unit. The echo cancellation unit comprises a first attenuator, a first filter and a first subtractor. The first attenuator has a first down-scaling factor for attenuating a first signal. The first filter generates a first echo signal estimate based on the attenuated first signal. The first subtractor generates a third signal by subtracting the first echo signal estimate from a second signal. The second filter generates a second echo signal estimate based on the first signal. The subtraction unit subtracts the second echo signal estimate from the third signal.
摘要翻译：公开了一种声学回声消除系统的实施例。该系统包括回波消除单元，第二滤波器和减法单元。回波消除单元包括第一衰减器，第一滤波器和第一减法器。第一衰减器具有用于衰减第一信号的第一降档因子。第一滤波器基于衰减的第一信号产生第一回波信号估计。第一减法器通过从第二信号中减去第一回波信号估计来产生第三信号。第二滤波器基于第一信号产生第二回波信号估计。减法单元从第三信号中减去第二回波信号估计。

9. 发明申请

US20080219434A1 METHOD AND APPARATUS FOR VOICE COMMUNICATION 有权
标题翻译：语音通信的方法和装置
公开(公告)号：US20080219434A1
公开(公告)日：2008-09-11
申请号：US12044041
申请日：2008-03-07
申请人： Qing-Guang Liu , Wilson Or
发明人： Qing-Guang Liu , Wilson Or
IPC分类号： H04M9/08
CPC分类号： H04M9/08
摘要： A voice communication device with an integrated framework structure for echo cancellation and noise reduction is disclosed. A microphone receives a local input signal while a speaker is outputting a local output signal. The local input signal and output signal are all decomposed into a plurality of subband signals by filter banks for conducting individual processing of echo cancellation and noise reduction per subband. The subband echo canceller is followed by a DFT unit to split the cancellation result into a plurality of narrow frequency bins whereby the noise reduction is performed. The noise reduction results are recombined by an IDFT unit for residual echo removal in a subband non-linear processor. The final output is obtained from a synthesis filter bank that synthesizes the subband signals after echo cancellation and noise reduction into a full-band signal.
摘要翻译：公开了一种具有用于回波消除和降噪的集成框架结构的语音通信设备。麦克风在扬声器输出本地输出信号时接收本地输入信号。本地输入信号和输出信号都通过滤波器组分解成多个子带信号，用于进行每个子带的回波消除和降噪的单独处理。子带回波消除器之后是DFT单元，以将取消结果分解成多个窄频率频段，由此执行降噪。噪声降低结果由IDFT单元重新组合，用于子带非线性处理器中的残余回波去除。从合成滤波器组获得最终输出，该滤波器组将回波消除和噪声降低之后的子带信号合成为全频带信号。

10. 发明授权

US5161204A Apparatus for generating a feature matrix based on normalized out-class and in-class variation matrices 失效
标题翻译：用于基于归一化的外部类和类内变化矩阵来生成特征矩阵的装置
公开(公告)号：US5161204A
公开(公告)日：1992-11-03
申请号：US533113
申请日：1990-06-04
申请人： Timothy L. Hutcheson , Wilson Or , Venkatesh Narayanan , Subramaniam Mohan , Peter G. Wohlmut , Ramanujam Srinivasan , Bobby R. Hunt , Thomas W. Ryan
发明人： Timothy L. Hutcheson , Wilson Or , Venkatesh Narayanan , Subramaniam Mohan , Peter G. Wohlmut , Ramanujam Srinivasan , Bobby R. Hunt , Thomas W. Ryan
IPC分类号： G06K9/00 , G06K9/52 , G06K9/62 , G06K9/66 , G07C9/00
CPC分类号： G06K9/00268 , G06K9/00221 , G06K9/522 , G06K9/6217 , G06K9/66 , G07C9/00071
摘要： A method and apparatus under software control for pattern recognition utilizes a neural network implementation to recognize two dimensional input images which are sufficiently similar to a database of previously stored two dimensional images. Images are first image processed and subjected to a Fourier transform which yields a power spectrum. An in-class to out-of-class study is performed on a typical collection of images in order to determine the most discriminatory regions of the Fourier transform. A feature vector consisting of the highest order (most discriminatory) magnitude information from the power spectrum of the Fourier transform of the image is formed. Feature vectors are input to a neural network having preferably two hidden layers, input dimensionality of the number of elements in the feature vector and output dimensionality of the number of data elements stored in the database. Unique identifier numbers are preferably stored along with the feature vector. Application of a query feature vector to the neural network will result in an output vector. The output vector is subjected to statistical analysis to determine if a sufficiently high confidence level exists to indicate that a successful identification has been made. Where a successful identification has occurred, the unique identifier number may be displayed.
摘要翻译：用于模式识别的软件控制下的方法和装置利用神经网络实现来识别与先前存储的二维图像的数据库足够相似的二维输入图像。首先对图像进行图像处理，并进行傅立叶变换，从而产生功率谱。为了确定傅里叶变换的最具歧视性的区域，对图像的典型集合执行类外的课外研究。形成由图像的傅里叶变换的功率谱的最高阶（最具辨别）的幅度信息构成的特征矢量。特征向量被输入到具有优选地两个隐藏层的神经网络，特征向量中的元素数量的输入维数和存储在数据库中的数据元素的数量的输出维数。唯一标识符号优选与特征向量一起存储。将查询特征向量应用于神经网络将导致输出向量。对输出向量进行统计分析以确定是否存在足够高的置信水平以指示已经进行了成功的识别。在发生成功识别的情况下，可以显示唯一标识符号。

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