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    A DOUBLE TALK ACTIVITY DETECTOR AND METHOD FOR AN ECHO CANCELER CIRCUIT
    1.
    发明专利
    A DOUBLE TALK ACTIVITY DETECTOR AND METHOD FOR AN ECHO CANCELER CIRCUIT 未知

    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

    IPC: H04M1/00 ,  H04M9/08

    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 ).

    AN ECHO CANCELER CIRCUIT AND METHOD
    2.
    发明专利
    AN ECHO CANCELER CIRCUIT AND METHOD 未知

    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).

    A DOUBLE TALK ACTIVITY DETECTOR AND METHOD FOR AN ECHO CANCELER CIRCUIT
    3.
    发明专利
    A DOUBLE TALK ACTIVITY DETECTOR AND METHOD FOR AN ECHO CANCELER CIRCUIT 未知

    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

    IPC: H04M1/00 ,  H04M9/08

    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).

    A DOWNLINK ACTIVITY AND DOUBLE TALK PROBABILITY DETECTOR ANDMETHOD FOR AN ECHO CANCELER CIRCUIT
    4.
    发明专利
    A DOWNLINK ACTIVITY AND DOUBLE TALK PROBABILITY DETECTOR ANDMETHOD FOR AN ECHO CANCELER CIRCUIT 未知

    公开(公告)号：CA2546530C

    公开(公告)日：2009-09-15

    申请号：CA2546530

    申请日：2004-12-07

    Applicant: MOTOROLA INC

    Inventor： IWAI KYLE K ,  PIKET JAMES B ,  ROKUSEK DANIEL S

    IPC: H04M1/00 ,  H04M9/08

    Abstract: A downlink activity and double talk probability detector and method for an echo canceler circuit (10) improves the stability of an echo canceler adapti ve filter (300) and improves the attenuation of post-echo canceler uplink data (388). The echo canceler circuit (10) includes a downlink activity and doubl e talk probability data generator (30) and an echo canceler stage (20). The downlink activity and double talk probability data generator (30) receives p re- echo canceler uplink data (40) and downlink data (50) and in response produc es 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).

    METHOD AND APPARATUS FOR DOUBLE-TALK DETECTION IN A HANDS-FREE COMMUNICATION SYSTEM
    6.
    发明申请
    METHOD AND APPARATUS FOR DOUBLE-TALK DETECTION IN A HANDS-FREE COMMUNICATION SYSTEM 审中-公开
    用于在免提通信系统中进行双语检测的方法和设备

    公开(公告)号：WO2007062287A8

    公开(公告)日：2008-08-21

    申请号：PCT/US2006060656

    申请日：2006-11-08

    Applicant: MOTOROLA INC ,  CRUZ-ZENO EDGARDO M ,  PIKET JAMES B ,  RAMABADRAN TENKASI V

    Inventor： CRUZ-ZENO EDGARDO M ,  PIKET JAMES B ,  RAMABADRAN TENKASI V

    IPC: H04M9/08

    CPC classification number: H04M9/082

    Abstract: An echo canceling circuit comprising a double talk detector, an upper band signal filter configured to pass only near-end upper band signals to the double talk detector and remove lower band signals, an adaptive filter circuit, a control circuit operatively coupled to the double talk detector and to the adaptive filter circuit, and a threshold estimator configured to iteratively calculate an upper adaptive decision threshold value and a lower adaptive decision threshold value. The double talk detector declares near-end speech to be present if an estimated power level of the upper band signals exceeds the upper adaptive decision threshold value, and declares the near-end speech to be absent if the estimated power level of the upper band signals falls below the lower adaptive decision threshold value for a predetermined number of iterative cycles.

    Abstract translation: 一种回声消除电路，包括双方讲话检测器，被配置为仅将近端高频带信号传递到双方讲话检测器并移除较低频带信号的高频带信号滤波器，自适应滤波器电路，操作性地耦合到双方讲话的控制电路 检测器和自适应滤波器电路，以及阈值估计器，被配置为迭代地计算上自适应判决阈值和下自适应判决阈值。 如果所述较高频带信号的估计功率电平超过所述较高自适应判决阈值，则所述双重通话检测器宣告近端语音存在，并且如果所述较高频带信号的所估计功率电平宣告所述近端语音不存在， 低于较低的自适应判定阈值达预定数量的迭代周期。

    MOBILE DEVICE ENHANCEMENT VIA A VEHICULAR TELEMATICS SYSTEM
    10.
    发明申请
    MOBILE DEVICE ENHANCEMENT VIA A VEHICULAR TELEMATICS SYSTEM 审中-公开
    移动设备通过车辆电话系统增强

    公开(公告)号：WO2007008312A2

    公开(公告)日：2007-01-18

    申请号：PCT/US2006021968

    申请日：2006-06-06

    Applicant: MOTOROLA INC ,  ROKUSEK DANIEL S ,  KAMBHAMPATI KRANTI K ,  PIKET JAMES B ,  SRENGER EDWARD

    Inventor： ROKUSEK DANIEL S ,  KAMBHAMPATI KRANTI K ,  PIKET JAMES B ,  SRENGER EDWARD

    IPC: H04W88/02

    CPC classification number: H04W88/02

    Abstract: An apparatus and method for enhancing a handheld communication device via a telematics system in a vehicle is disclosed. Audio received at the handheld device is transferred to the telematics system in the vehicle. The received audio is then analyzed to determine whether it contains speech, and if so, an audio present signal is generated and the received audio is recorded into a memory coupled to the telematics system. The user can then engage the user interface of the telematics system to replay the recorded audio. Bluetooth protocol is preferably used to establish a channel between the handheld device and the telematics system, which can occur automatically when the two are in proximity. Analysis of the received audio preferably comprises use of a voice detector as part of a speech recognition system otherwise used by the telematics system to assess spoken commands. The memory is preferably overwritten with the latest audio sent from the handheld device to the telematics system, such that engaging the telematics system for playback of the recorded audio will repeat only the last audio sent.

    Abstract translation: 公开了一种用于通过车辆中的远程信息处理系统增强手持通信设备的装置和方法。 在手持设备处接收的音频被传送到车辆中的远程信息处理系统。 然后分析接收到的音频以确定其是否包含语音，如果是，则产生音频呈现信号，并将接收的音频记录到耦合到远程信息处理系统的存储器中。 然后，用户可以接合远程信息处理系统的用户界面来重放记录的音频。 蓝牙协议优选地用于在手持设备和远程信息处理系统之间建立信道，当两者处于邻近状态时，该协议可以自动发生。 对所接收的音频的分析优选地包括使用语音检测器作为语音识别系统的一部分，否则由远程信息处理系统用于评估语音命令。 存储器优选地被从手持设备发送到远程信息处理系统的最新音频被覆盖，使得接合远程信息处理系统用于重放所记录的音频将仅重复发送的最后音频。

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