SYSTEM FOR CALIBRATING A HANDS-FREE SYSTEM
    1.
    发明申请
    SYSTEM FOR CALIBRATING A HANDS-FREE SYSTEM 有权
    用于校准无手机系统的系统

    公开(公告)号:US20080020807A1

    公开(公告)日:2008-01-24

    申请号:US11782514

    申请日:2007-07-24

    IPC分类号: H04M1/00

    CPC分类号: H04M1/24 H04M1/6075

    摘要: A method for calibrating a hands-free system is provided. The hands-free system comprising a hands-free unit and a mobile phone, the method comprising the following steps of setting up a connection between the hands-free system and a distant terminal via a mobile telephony network of the mobile phone, transmitting a predetermined test signal from one of the hands-free system and the distant terminal to the other of the hands-free system and the distant terminal, the predetermined test signal being provided in both the hands-free system and the distant terminal as reference test signal, comparing the received test signal to the reference test signal stored in the other of the hands-free system and the distant terminal, and determining the calibration parameters of the hands-free system in accordance with the comparison.

    摘要翻译: 提供了一种用于校准免提系统的方法。 所述免提系统包括免提单元和移动电话,所述方法包括以下步骤:经由移动电话的移动电话网建立免提系统与远程终端之间的连接,发送预定的 测试信号从免提系统和远程终端之一到免提系统和远端终端中的另一个,预定测试信号被提供在免提系统和远端中作为参考测试信号, 将所接收的测试信号与存储在另一个免提系统和远程终端中的参考测试信号进行比较,以及根据该比较来确定免提系统的校准参数。

    System for calibrating a hands-free system
    2.
    发明授权
    System for calibrating a hands-free system 有权
    用于校准免提系统的系统

    公开(公告)号:US07826799B2

    公开(公告)日:2010-11-02

    申请号:US11782514

    申请日:2007-07-24

    IPC分类号: H04B17/00

    CPC分类号: H04M1/24 H04M1/6075

    摘要: A method for calibrating a hands-free system is provided. The hands-free system comprising a hands-free unit and a mobile phone, the method comprising the following steps of setting up a connection between the hands-free system and a distant terminal via a mobile telephony network of the mobile phone, transmitting a predetermined test signal from one of the hands-free system and the distant terminal to the other of the hands-free system and the distant terminal, the predetermined test signal being provided in both the hands-free system and the distant terminal as reference test signal, comparing the received test signal to the reference test signal stored in the other of the hands-free system and the distant terminal, and determining the calibration parameters of the hands-free system in accordance with the comparison.

    摘要翻译: 提供了一种用于校准免提系统的方法。 所述免提系统包括免提单元和移动电话,所述方法包括以下步骤:经由移动电话的移动电话网建立免提系统与远程终端之间的连接,发送预定的 测试信号从免提系统和远程终端之一到免提系统和远端终端中的另一个,预定测试信号被提供在免提系统和远端中作为参考测试信号, 将所接收的测试信号与存储在另一个免提系统和远程终端中的参考测试信号进行比较,以及根据该比较来确定免提系统的校准参数。

    LOW COMPLEXITY ECHO COMPENSATION SYSTEM
    5.
    发明申请
    LOW COMPLEXITY ECHO COMPENSATION SYSTEM 有权
    低复杂度ECHO补偿系统

    公开(公告)号:US20080144848A1

    公开(公告)日:2008-06-19

    申请号:US11955862

    申请日:2007-12-13

    IPC分类号: H04B3/20

    CPC分类号: H04M9/082

    摘要: An echo reduction system includes a signal analysis filter that converts an input into sub-band signals. A signal down-sampling circuit down-samples the sub-band signals at a first down-sampling rate. An echo analysis filter converts a loudspeaker signal into echo sub-band signal that are further processed by an echo down-sampling circuit. The circuit down-samples the echo sub-band signals at a second down-sampling rate to generate down-sampled echo sub-band signals. An echo compensation filter folds the down-sampled echo sub-band signals with an estimated impulse response of a loudspeaker-room-input system. A second echo down-sampling circuit down-samples the folded down-sampled echo sub-band signals at a third down-sampling rate to generate estimated echo sub-band signals. The first down-sampling rate is equal to the product of the second and third down-sampling rates.

    摘要翻译: 回波减少系统包括将输入转换为子带信号的信号分析滤波器。 信号下采样电路以第一下采样率对子带信号进行下采样。 回波分析滤波器将扬声器信号转换成由回波下采样电路进一步处理的回波子带信号。 电路以第二次下采样率对回波子带信号进行下采样以产生下采样的回波子带信号。 回波补偿滤波器用扬声器室输入系统的估计的脉冲响应折叠下采样的回波子带信号。 第二回波下采样电路以三次下采样率对折叠的下采样回波子带信号进行下采样,以产生估计的回波子带信号。 第一个下采样率等于第二次和第三次下采样率的乘积。

    Low complexity echo compensation system
    6.
    发明授权
    Low complexity echo compensation system 有权
    低复杂度回波补偿系统

    公开(公告)号:US08194852B2

    公开(公告)日:2012-06-05

    申请号:US11955862

    申请日:2007-12-13

    IPC分类号: H04M9/08

    CPC分类号: H04M9/082

    摘要: An echo reduction system includes a signal analysis filter that converts an input into sub-band signals. A signal down-sampling circuit down-samples the sub-band signals at a first down-sampling rate. An echo analysis filter converts a loudspeaker signal into echo sub-band signal that are further processed by an echo down-sampling circuit. The circuit down-samples the echo sub-band signals at a second down-sampling rate to generate down-sampled echo sub-band signals. An echo compensation filter folds the down-sampled echo sub-band signals with an estimated impulse response of a loudspeaker-room-input system. A second echo down-sampling circuit down-samples the folded down-sampled echo sub-band signals at a third down-sampling rate to generate estimated echo sub-band signals. The first down-sampling rate is equal to the product of the second and third down-sampling rates.

    摘要翻译: 回波减少系统包括将输入转换为子带信号的信号分析滤波器。 信号下采样电路以第一下采样率对子带信号进行下采样。 回波分析滤波器将扬声器信号转换成由回波下采样电路进一步处理的回波子带信号。 电路以第二次下采样率对回波子带信号进行下采样以产生下采样的回波子带信号。 回波补偿滤波器用扬声器室输入系统的估计的脉冲响应折叠下采样的回波子带信号。 第二回波下采样电路以三次下采样率对折叠的下采样回波子带信号进行下采样,以产生估计的回波子带信号。 第一个下采样率等于第二次和第三次下采样率的乘积。