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公开(公告)号：CA2546535A1
公开(公告)日：2005-07-07
申请号：CA2546535
申请日：2004-12-07
Applicant: MOTOROLA INC
Inventor： PIKET JAMES B , OWENS KEITH L , SPRINGFIELD CHRISTOPHER W
Abstract: A double talk activity detector ( 30 ) and method for an echo canceler circuit ( 10 ) improves the probability of detecting a double talk condition based on at least pre-echo canceler uplink data ( 40 ). The echo canceler circuit ( 10 ) includes a double talk activity probability data generator ( 30 ) and an echo canceler stage ( 20 ). The double talk activity probability data generator ( 30 ) receives pre-echo canceler uplink data ( 40 ) and in response produces double talk activity probability data ( 50 ). The echo canceler stage ( 20 ) is coupled to the double talk activity probability data generator ( 30 ) and receives downlink data ( 60 ), pre-echo canceler uplink data ( 40 ) and the double talk activity probability data ( 50 ) and in response produces attenuated uplink data ( 70 ).
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公开(公告)号：HK1081026A1
公开(公告)日：2006-05-04
申请号：HK06100730
申请日：2006-01-17
Applicant: MOTOROLA INC
Inventor： OWENS KEITH L , PIKET JAMES B , SPRINGFIELD CHRISTOPHER W
IPC: G10L20090101 , H04B20090101 , H04B3/20 , H04B3/23 , H04M20090101 , H04M9/08
Abstract: 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).
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Patent Agency Ranking
公开(公告)号：CA2546535C
公开(公告)日：2009-09-15
申请号：CA2546535
申请日：2004-12-07
Applicant: MOTOROLA INC
Inventor： PIKET JAMES B , SPRINGFIELD CHRISTOPHER W , OWENS KEITH L
Abstract: A double talk activity detector (30) and method for an echo canceler circuit (10) improves the probability of detecting a double talk condition based on at least pre-echo canceler uplink data (40). The echo canceler circuit (10) includes a double talk activity probability data generator (30) and an echo canceler stage (20). The double talk activity probability data generator (30 ) receives pre-echo canceler uplink data (40) and in response produces double talk activity probability data (50). The echo canceler stage (20) is coupled to the double talk activity probability data generator (30) and receives downlink data (60), pre-echo canceler uplink data (40) and the double talk activity probability data (50) and in response produces attenuated uplink da ta (70).
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公开(公告)号：MXPA06006639A
公开(公告)日：2006-08-31
申请号：MXPA06006639
申请日：2004-12-07
Applicant: MOTOROLA INC
Inventor： SPRINGFIELD CHRISTOPHER W
Abstract: Un detector de actividad de ambiguedad (30) y metodo para un circuito cancelador de eco (10) mejora la probabilidad de detectar una condicion de ambiguedad con base, por lo menos, en los datos de enlace ascendente del cancelador de pre-eco (40); el circuito cancelador de eco (10) incluye un generador de datos de probabilidad de actividad de ambiguedad (30) y un escalonamiento de cancelador de eco (20); el generador de datos de probabilidad de actividad de ambiguedad (30) recibe los datos de enlace ascendente del cancelador de pre-eco (40) y, en respuesta, produce datos de probabilidad de actividad de ambiguedad (50); el escalonamiento de cancelador de eco (20) esta acoplado al generador de datos de probabilidad de actividad de ambiguedad (30) y recibe datos de enlace descendente (60), datos de enlace ascendente del cancelador de pre-eco (40) y datos de probabilidad de actividad de ambiguedad (50) y, en respuesta, produce datos de enlace ascendente atenuados (70).
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5.发明申请A DOUBLE TALK ACTIVITY DETECTOR AND METHOD FOR AN ECHO CANCELER CIRCUIT 审中-公开一种用于ECHO CANCERER电路的双通道激活检测器和方法
公开(公告)号：WO2005060583A3
公开(公告)日：2006-01-05
申请号：PCT/US2004040807
申请日：2004-12-07
Applicant: MOTOROLA INC , PIKET JAMES B , OWENS KEITH L , SPRINGFIELD CHRISTOPHER W
Inventor： PIKET JAMES B , OWENS KEITH L , SPRINGFIELD CHRISTOPHER W
CPC classification number: H04M9/082
Abstract: A double talk activity detector (30) and method for an echo canceler circuit (10) improves the probability of detecting a double talk condition based on at least pre-echo canceler uplink data (40). The echo canceler circuit (10) includes a double talk activity probability data generator (30) and an echo canceler stage (20). The double talk activity probability data generator (30) receives pre-echo canceler uplink data (40) and in response produces double talk activity probability data (50). The echo canceler stage (20) is coupled to the double talk activity probability data generator (30) and receives downlink data (60), pre-echo canceler uplink data (40) and the double talk activity probability data (50) and in response produces attenuated uplink data (70).
Abstract translation: 基于至少前回波消除器上行链路数据（40）的双向通话活动检测器（30）和用于回波消除器电路（10）的方法提高了检测双向通话条件的可能性。 回波消除器电路（10）包括双通话活动概率数据发生器（30）和回波消除器级（20）。 双向对话活动概率数据生成器（30）接收前回波消除器上行链路数据（40），并且作为响应产生双方通话活动概率数据（50）。 回波消除器级（20）耦合到双向通话活动概率数据生成器（30），并接收下行链路数据（60），前回波消除器上行数据（40）和双方通话活动概率数据（50） 产生衰减的上行链路数据（70）。
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6.发明申请A REDUCED COMPLEXITY RECURSIVE LEAST SQUARE LATTICE STRUCTURE ADAPTIVE FILTER BY MEANS OF APPROXIMATING THE FORWARD ERROR PREDICTION SQUARES USING THE BACKWARD ERROR PREDICTION SQUARES 审中-公开通过使用后向误差预测误差来估计前向误差预测误差的方法，减少复杂度的最小二乘法结构自适应滤波器
公开(公告)号：WO2007001787A3
公开(公告)日：2007-07-12
申请号：PCT/US2006022289
申请日：2006-06-08
Applicant: MOTOROLA INC , BARRON DAVID L , PIKET JAMES B , SPRINGFIELD CHRISTOPHER W
Inventor： BARRON DAVID L , PIKET JAMES B , SPRINGFIELD CHRISTOPHER W
IPC: G06F17/10
CPC classification number: H03H21/0014 , H03H2021/0049
Abstract: A method for reducing a computational complexity of an m-stage adaptive filter is provided by determining a weighted sum of backward prediction error squares for stage m at time n, determining a conversion factor for stage m at time n, inverting the weighted sum of backward prediction error squares, and approximating a weighted sum of forward prediction error squares by combining the inverted weighted sum of backward prediction error squares with the conversion factor.
Abstract translation: 通过确定在时间n的阶段m的后向预测误差平方的加权和，确定在时间n的阶段m的转换因子，将倒数的加权和反转，从而提供一种降低m级自适应滤波器的计算复杂度的方法 预测误差平方，并通过将后向预测误差平方的反相加权和与转换因子组合来近似正向预测误差平方的加权和。
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7.发明公开A DOUBLE TALK ACTIVITY DETECTOR AND METHOD FOR AN ECHO CANCELER CIRCUIT 审中-公开双向通话活动检测器及方法ECHOKOMPENSATORSCHALTUNG
公开(公告)号：EP1697192A4
公开(公告)日：2008-08-06
申请号：EP04813167
申请日：2004-12-07
Applicant: MOTOROLA INC
Inventor： PIKET JAMES B , OWENS KEITH L , SPRINGFIELD CHRISTOPHER W
CPC classification number: H04M9/082
Abstract: A double talk activity detector (30) and method for an echo canceler circuit (10) improves the probability of detecting a double talk condition based on at least pre-echo canceler uplink data (40). The echo canceler circuit (10) includes a double talk activity probability data generator (30) and an echo canceler stage (20). The double talk activity probability data generator (30) receives pre-echo canceler uplink data (40) and in response produces double talk activity probability data (50). The echo canceler stage (20) is coupled to the double talk activity probability data generator (30) and receives downlink data (60), pre-echo canceler uplink data (40) and the double talk activity probability data (50) and in response produces attenuated uplink data (70).
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