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1. 发明授权

US07680265B2 Echo canceler circuit and method 有权
标题翻译：回波消除器电路及方法
公开(公告)号：US07680265B2
公开(公告)日：2010-03-16
申请号：US10735270
申请日：2003-12-12
申请人： James B. Piket , Kyle K. Iwai , Daniel S. Rokusek
发明人： James B. Piket , Kyle K. Iwai , Daniel S. Rokusek
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： An echo canceller circuit (200) and method performs cascaded echo cancellation and noise suppression in a non-interfering manner. The echo canceller circuit (200) includes pre-noise suppression logic (210), echo canceller coefficient logic (218), noise suppression logic (212) and an echo canceller filter (216). The pre-noise suppression logic (210) receives pre-echo canceller uplink data (64) and downlink data (52), and in response produces pre-noise suppression uplink data (224). The echo canceller coefficient logic (218) receives the pre-noise suppression uplink data (224) and the pre-echo canceller uplink data (64), and in response produces filter coefficient data (226). The noise suppression logic (212) receives the pre-noise suppression uplink data (224), and in response produces noise suppressed uplink data (228). The echo canceller filter (216) receives the noise suppressed uplink data (228) and the filter coefficient data (226) and in response produces final uplink data (230).
摘要翻译：回波消除电路（200）和方法以非干扰方式执行级联回波消除和噪声抑制。回波消除电路（200）包括噪声抑制逻辑（210），回波消除器系数逻辑（218），噪声抑制逻辑（212）和回声消除器滤波器（216）。预噪声抑制逻辑（210）接收预回波消除器上行链路数据（64）和下行链路数据（52），并且响应于产生预噪声抑制上行链路数据（224）。回波消除器系数逻辑（218）接收预噪声抑制上行链路数据（224）和预回波消除器上行链路数据（64），并且响应产生滤波器系数数据（226）。噪声抑制逻辑（212）接收预噪声抑制上行链路数据（224），并且响应于产生噪声抑制上行链路数据（228）。回波消除器滤波器（216）接收噪声抑制上行链路数据（228）和滤波器系数数据（226），并且响应产生最终上行链路数据（230）。

2. 发明授权

US08467521B2 Echo canceler circuit and method 有权
标题翻译：回波消除器电路及方法
公开(公告)号：US08467521B2
公开(公告)日：2013-06-18
申请号：US12699947
申请日：2010-02-04
申请人： James B. Piket , Kyle K. Iwai , Daniel S. Rokusek
发明人： James B. Piket , Kyle K. Iwai , Daniel S. Rokusek
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： Received data is filtered to produce pre-noise suppression data. Noise is removed from the pre-noise suppression data to provide noise-suppressed data. At least one weighted filter coefficient is dynamically determined using at least the pre-noise suppression data and not the noise suppressed data. The determination occurs independently from and is not affected by removing the noise from the pre-noise suppression data. Removing the noise from the pre-noise suppression data occurs independently from and is not affected by dynamically determining the at least one weighted coefficient.
摘要翻译：接收的数据被过滤以产生噪声前抑制数据。从噪声抑制数据中消除噪声，提供噪声抑制数据。使用至少预噪声抑制数据而不是噪声抑制数据来动态地确定至少一个加权滤波器系数。该确定独立于并且不受去除噪声抑制数据中的噪声的影响。从预噪声抑制数据中去除噪声独立地发生并且不受动态确定至少一个加权系数的影响。

3. 发明申请

US20100197232A1 Echo Canceler Circuit And Method 有权
标题翻译：回波消除电路和方法
公开(公告)号：US20100197232A1
公开(公告)日：2010-08-05
申请号：US12699947
申请日：2010-02-04
申请人： James B. Piket , Kyle K. Iwai , Daniel S. Rokusek
发明人： James B. Piket , Kyle K. Iwai , Daniel S. Rokusek
IPC分类号： H04B15/00
CPC分类号： H04M9/082
摘要： Received data is filtered to produce pre-noise suppression data. Noise is removed from the pre-noise suppression data to provide noise-suppressed data. At least one weighted filter coefficient is dynamically determined using at least the pre-noise suppression data and not the noise suppressed data. The determination occurs independently from and is not affected by removing the noise from the pre-noise suppression data. Removing the noise from the pre-noise suppression data occurs independently from and is not affected by dynamically determining the at least one weighted coefficient.
摘要翻译：接收的数据被过滤以产生噪声前抑制数据。从噪声抑制数据中消除噪声，提供噪声抑制数据。使用至少预噪声抑制数据而不是噪声抑制数据来动态地确定至少一个加权滤波器系数。该确定独立于并且不受去除噪声抑制数据中的噪声的影响。从预噪声抑制数据中去除噪声独立地发生并且不受动态确定至少一个加权系数的影响。

4. 发明授权

US07099458B2 Downlink activity and double talk probability detector and method for an echo canceler circuit 有权
标题翻译：用于回波消除器电路的下行链路和双通道概率检测器和方法
公开(公告)号：US07099458B2
公开(公告)日：2006-08-29
申请号：US10735301
申请日：2003-12-12
申请人： James B. Piket , Kyle K. Iwai , Daniel S. Rokusek
发明人： James B. Piket , Kyle K. Iwai , Daniel S. Rokusek
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： A downlink activity and double talk probability detector and method for an echo canceler circuit (10) improves the stability of an echo canceler adaptive filter (300) and improves the attenuation of post-echo canceler uplink data (388). The echo canceler circuit (10) includes a downlink activity and double talk probability data generator (30) and an echo canceler stage (20). The downlink activity and double talk probability data generator (30) receives pre-echo canceler uplink data (40) and downlink data (50) and in response produces double talk probability data (60) and downlink activity data (70). The echo canceler stage (20) receives the downlink data (50), the pre-echo canceler uplink data (40), the double talk probability data (60) and the downlink activity data (70), and in response produces uplink data (80).
摘要翻译：一种用于回波消除器电路（10）的下行链路活动和双通话概率检测器和方法提高了回波消除器自适应滤波器（300）的稳定性，并且改善了回波后消除器上行链路数据（388）的衰减。回波消除器电路（10）包括下行链路活动和双向通话概率数据发生器（30）和回波消除器级（20）。下行链路活动和双向通话概率数据生成器（30）接收前回波消除器上行链路数据（40）和下行链路数据（50），并且作为响应产生双通话概率数据（60）和下行链路活动数据（70）。回波消除器级（20）接收下行链路数据（50），前回波消除器上行链路数据（40），双方通话概率数据（60）和下行链路活动数据（70），并且作为响应产生上行链路数据 80）。

5. 发明授权

US07734466B2 Reduced complexity recursive least square lattice structure adaptive filter by means of limited recursion of the backward and forward error prediction squares 有权
标题翻译：通过后向和前向误差预测方块的有限递归，减少复杂度递归最小二乘格子结构自适应滤波器
公开(公告)号：US07734466B2
公开(公告)日：2010-06-08
申请号：US11399907
申请日：2006-04-07
申请人： David L. Barron , Kyle K. Iwai , James B. Piket
发明人： David L. Barron , Kyle K. Iwai , James B. Piket
IPC分类号： G10L15/00 , G10L19/00 , G10L11/00 , G10L15/06
CPC分类号： H03H21/0014 , H03H21/0043 , H03H2021/0049 , H03H2021/007 , H03H2021/0074
摘要： A method for reducing a computational complexity of an m-stage adaptive filter is provided by updating recursively forward and backward error prediction square terms for a first portion of a length of the adaptive filter, and keeping the updated forward and backward error prediction square terms constant for a second portion of the length of the adaptive filter.
摘要翻译：通过对自适应滤波器的长度的第一部分的递归前向和后向误差预测平方项进行更新，并且保持更新的前向和后向误差预测平方项恒定，提供了用于降低m级自适应滤波器的计算复杂度的方法对于自适应滤波器的长度的第二部分。

6. 发明申请

US20100022282A1 Echo Canceler Circuit and Method 有权
标题翻译：回波消除电路和方法
公开(公告)号：US20100022282A1
公开(公告)日：2010-01-28
申请号：US12573111
申请日：2009-10-03
申请人： James B. Piket , Keith L. Owens , Christopher W. Springfield
发明人： James B. Piket , Keith L. Owens , Christopher W. Springfield
IPC分类号： H04M1/00
CPC分类号： H04M9/082
摘要： An echo canceler circuit (10) and method attenuates at least post-echo canceler uplink data (90) to produce attenuated uplink data (100) in response to uplink echo return loss based attenuation data (40). The echo canceler circuit (10) includes an echo return loss based attenuation data generator (20) and at least an uplink data attenuator (30). The echo return loss based attenuation data generator (20) produces the uplink echo return loss based attenuation data (40) in response to echo return loss data (70). The echo return loss data (70) is based on at least one of: attenuated downlink data (50), pre-echo canceler uplink data (60), and/or amplifier gain data (80). The uplink data attenuator (30) attenuates the post-echo canceler uplink data (90) to produce attenuated uplink data (100) based on the uplink echo return loss based attenuation data (40).
摘要翻译：回波抵消器电路（10）和方法至少衰减后回波抵消器上行链路数据（90），以响应于基于上行链路回波回波损耗的衰减数据（40）产生衰减的上行链路数据（100）。回波消除器电路（10）包括基于回波损耗的衰减数据发生器（20）和至少一个上行链路数据衰减器（30）。基于回波回波损耗的衰减数据发生器（20）响应于回波回波损耗数据（70）产生基于上行链路回波损耗的衰减数据（40）。回波回波损耗数据（70）基于衰减的下行链路数据（50），预回波消除器上行链路数据（60）和/或放大器增益数据（80）中的至少一个。上行链路数据衰减器（30）基于上行回波回波损耗衰减数据（40）衰减后回波抵消器上行链路数据（90）以产生衰减的上行链路数据（100）。

7. 发明授权

US07599483B2 Echo canceler circuit and method 有权
标题翻译：回波消除器电路及方法
公开(公告)号：US07599483B2
公开(公告)日：2009-10-06
申请号：US10735272
申请日：2003-12-12
申请人： James B. Piket , Keith L. Owens , Christopher W. Springfield
发明人： James B. Piket , Keith L. Owens , Christopher W. Springfield
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： An echo canceler circuit (10) and method attenuates at least post-echo canceler uplink data (90) to produce attenuated uplink data (100) in response to uplink echo return loss based attenuation data (40). The echo canceler circuit (10) includes an echo return loss based attenuation data generator (20) and at least an uplink data attenuator (30). The echo return loss based attenuation data generator (20) produces the uplink echo return loss based attenuation data (40) in response to echo return loss data (70). The echo return loss data (70) is based on at least one of: attenuated downlink data (50), pre-echo canceler uplink data (60), and/or amplifier gain data (80). The uplink data attenuator (30) attenuates the post-echo canceler uplink data (90) to produce attenuated uplink data (100) based on the uplink echo return loss based attenuation data (40).
摘要翻译：回波抵消器电路（10）和方法至少衰减后回波消除器上行链路数据（90），以响应于基于上行链路回波回波损耗的衰减数据（40）产生衰减的上行链路数据（100）。回波消除器电路（10）包括基于回波损耗的衰减数据发生器（20）和至少一个上行链路数据衰减器（30）。基于回波回波损耗的衰减数据发生器（20）响应于回波回波损耗数据（70）产生基于上行链路回波损耗的衰减数据（40）。回波回波损耗数据（70）基于衰减的下行链路数据（50），预回波消除器上行链路数据（60）和/或放大器增益数据（80）中的至少一个。上行链路数据衰减器（30）基于上行回波回波损耗衰减数据（40）衰减后回波抵消器上行链路数据（90）以产生衰减的上行链路数据（100）。

8. 发明授权

US5506889A Digital voice privacy apparatus and method 失效
标题翻译：数字语音隐私设备及方法
公开(公告)号：US5506889A
公开(公告)日：1996-04-09
申请号：US315721
申请日：1994-09-30
申请人： David T. Gustafson , Paul R. Kennedy , Shirley H. Lee , James B. Piket
发明人： David T. Gustafson , Paul R. Kennedy , Shirley H. Lee , James B. Piket
IPC分类号： H04K1/00 , H04Q7/38
CPC分类号： H04K1/00
摘要： A cellular voice privacy arrangement includes a digital privacy unit which is part of each subscriber's fixed equipment. The digital privacy unit includes suitable analog to digital and digital to analog converters. A vocoder, digital signal processor and modem provide the privacy. The identification numbers of each terminal (phone) are exclusive-ORed to form a scramble variable. Vocoder data (voice coded information) is exclusive-ORed with the scramble variable to provided scrambled data for transmission.
摘要翻译：蜂窝语音隐私安排包括作为每个用户的固定设备的一部分的数字隐私单元。数字隐私单元包括合适的模数转换器和数模转换器。声码器，数字信号处理器和调制解调器提供隐私。每个终端（电话）的标识号是异或以形成一个扰频变量。声码器数据（语音编码信息）与加扰变量进行异或运算，以提供用于传输的加扰数据。

9. 发明授权

US08238546B2 Echo canceler circuit and method 有权
标题翻译：回波消除器电路及方法
公开(公告)号：US08238546B2
公开(公告)日：2012-08-07
申请号：US12573111
申请日：2009-10-03
申请人： James B. Piket , Keith L. Owens , Christopher W. Springfield
发明人： James B. Piket , Keith L. Owens , Christopher W. Springfield
IPC分类号： H04M9/08
CPC分类号： H04M9/082
摘要： An echo canceler circuit (10) and method attenuates at least post-echo canceler uplink data (90) to produce attenuated uplink data (100) in response to uplink echo return loss based attenuation data (40). The echo canceler circuit (10) includes an echo return loss based attenuation data generator (20) and at least an uplink data attenuator (30). The echo return loss based attenuation data generator (20) produces the uplink echo return loss based attenuation data (40) in response to echo return loss data (70). The echo return loss data (70) is based on at least one of: attenuated downlink data (50), pre-echo canceler uplink data (60), and/or amplifier gain data (80). The uplink data attenuator (30) attenuates the post-echo canceler uplink data (90) to produce attenuated uplink data (100) based on the uplink echo return loss based attenuation data (40).
摘要翻译：回波抵消器电路（10）和方法至少衰减后回波抵消器上行链路数据（90），以响应于基于上行链路回波回波损耗的衰减数据（40）产生衰减的上行链路数据（100）。回波消除器电路（10）包括基于回波损耗的衰减数据发生器（20）和至少一个上行链路数据衰减器（30）。基于回波回波损耗的衰减数据发生器（20）响应于回波回波损耗数据（70）产生基于上行链路回波损耗的衰减数据（40）。回波回波损耗数据（70）基于衰减的下行链路数据（50），预回波消除器上行链路数据（60）和/或放大器增益数据（80）中的至少一个。上行链路数据衰减器（30）基于上行回波回波损耗衰减数据（40）衰减后回波抵消器上行链路数据（90）以产生衰减的上行链路数据（100）。

10. 发明授权

US06799062B1 Full-duplex hands-free transparency circuit and method therefor 有权
标题翻译：全双工免提透明电路及其方法
公开(公告)号：US06799062B1
公开(公告)日：2004-09-28
申请号：US09692333
申请日：2000-10-19
申请人： James B. Piket , Christopher W. Springfield , William C. Yip
发明人： James B. Piket , Christopher W. Springfield , William C. Yip
IPC分类号： H04B320
CPC分类号： H04M9/082
摘要： A bi-directional hands-free communication device includes a microphone for transmitting a signal along a transmit path and a speaker receiving a signal transmitted along a receive path and outputting a corresponding output signal. An echo canceller, positioned in the transmit path and the receive path, cancels echo signals induced by the microphone from the speaker and outputs a corresponding cancelled signal along the transmit path, and a transparency circuit distributes state-dependent additional loss derived from the noise floor margin to the transmit path and the receive path to reduce residual echo signals output from the echo canceller. The transparency circuit measures a noise floor and inserts an artificial noise signal to the transmit path, and optionally to the receive path, at a predetermined level in relation to the measured noise floor, and dynamically adjusts the speaker to compensate for changing environmental conditions by dividing a range of an expected ambient noise power into adjacent consecutive bins, and controlling a volume of the speaker responsive to ambient noise changes only when measured noise power moves into an adjacent bin.
摘要翻译：双向免提通信装置包括用于沿发送路径发送信号的麦克风和接收沿着接收路径发送的信号的扬声器，并输出相应的输出信号。定位在发射路径和接收路径中的回波消除器消除了麦克风从扬声器引起的回波信号，并沿着发射路径输出相应的取消信号，透明电路分配从噪声基底导出的依赖于状态的附加损耗发送路径和接收路径的余量以减少从回波消除器输出的残余回波信号。透明电路测量本底噪声，并将噪声信号插入发射路径，并可选地接收到接收路径，以相对于测量的本底噪声为预定水平，并动态调整扬声器，以通过划分来补偿变化的环境条件预期的环境噪声功率的范围到相邻的连续箱中，并且仅当测量的噪声功率移动到相邻的箱中时，才响应于环境噪声改变扬声器的音量。

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