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    LOUDSPEAKER VOLUME RANGE CONTROL
    1.
    发明申请
    LOUDSPEAKER VOLUME RANGE CONTROL 审中-公开
    扬声器音量范围控制

    公开(公告)号：WO0076176A3

    公开(公告)日：2001-07-05

    申请号：PCT/EP0004242

    申请日：2000-05-10

    Applicant: ERICSSON TELEFON AB L M

    Inventor： PHILIPSSON JOHN ,  RASMUSSON JIM

    IPC: H04R3/02 ,  H04B3/20 ,  H04M1/60 ,  H04M9/08 ,  H04R5/02

    CPC classification number: H04R5/02 ,  H04M9/082

    Abstract: The present invention relates to a loudspeaker volume control arrangement for a telephone having a loudspeaker and a microphone which controls the loudspeaker volume of the telephone based on the estimated distance between the microphone and the loudspeaker.

    Abstract translation: 本发明涉及一种具有扬声器和麦克风的电话机扬声器音量控制装置，该扬声器和麦克风基于麦克风和扬声器之间的估计距离来控制电话机的扬声器音量。

    ACOUSTICAL ECHO CANCELLATION DEVICE
    2.
    发明申请
    ACOUSTICAL ECHO CANCELLATION DEVICE 审中-公开
    消声器取消装置

    公开(公告)号：WO0110102A3

    公开(公告)日：2002-03-14

    申请号：PCT/EP0007321

    申请日：2000-07-28

    Applicant: ERICSSON TELEFON AB L M

    Inventor： LINDGREN ULF ,  MISRA MOHAN ,  PHILIPSSON JOHN

    IPC: G10L21/02 ,  H04B3/21 ,  H04B3/23 ,  H04B7/015 ,  H04M1/00 ,  H04M1/60 ,  H04M9/08

    CPC classification number: H04M9/082 ,  H04B3/21

    Abstract: An echo cancellation device (ECD) comprises an echo canceller (EC) including a transfer function estimator (EST, H) and a subtractor (ADD) and a residual echo suppression device (G, ADD2). The residual echo suppression device (G) comprises a residual echo filter (G) having an adjustable filter function (g). This filter function (g) can be adapted to either remove from the subtractor output (TNE') of the subtractor (ADD) the spectral characteristics relating to the reception signal (RFE) and/or to emphasize in the subtractor output signal (TNE') of the subtractor (ADD) a background signal spectral content relating to the transmission signal (TNE) generated by an transmitting unit (MC, TCRT). A noise generation means (NGM') can be provided at the output of the adaptable filter (G) for injecting a noise process in to the filter output signal (TNE') prior to a speech coding in a speech coder (COD). The noise process masks in the filter output signal a spectral content relating to the reception signal (RFE). The echo cancellation devices (ECD) according to the invention provide the advantage of an improved residual echo cancellation where there is no necessity to change code words or to bypass the echo canceller (EC).

    Abstract translation: 回波消除装置（ECD）包括包括传递函数估计器（EST，H）和减法器（ADD）和残余回声抑制装置（G，ADD2）的回波消除器（EC）。 残余回声抑制装置（G）包括具有可调滤波器功能（g）的残余回波滤波器（G）。 该滤波器功能（g）可以适于从减法器（ADD）的减法器输出（TNE'）移除与接收信号（RFE）相关的频谱特性和/或在减法器输出信号（TNE' 减法器（ADD））与由发送单元（MC，TCRT）生成的发送信号（TNE）有关的背景信号频谱内容。 在适应滤波器（G）的输出处可以提供噪声发生装置（NGM'），用于在语音编码器（COD）中的语音编码之前将噪声处理注入到滤波器输出信号（TNE'）中。 噪声处理在滤波器输出信号中屏蔽与接收信号（RFE）相关的频谱内容。 根据本发明的回声消除装置（ECD）提供了改进的残余回波消除的优点，其中不需要改变码字或绕过回声消除器（EC）。

    ADAPTABILITY TO MULTIPLE HANDS-FREE COMMUNICATION ACCESSORIES
    3.
    发明申请
    ADAPTABILITY TO MULTIPLE HANDS-FREE COMMUNICATION ACCESSORIES 审中-公开
    适用于多种无通讯通讯配件

    公开(公告)号：WO0074350A3

    公开(公告)日：2001-03-29

    申请号：PCT/EP0004858

    申请日：2000-05-29

    Applicant: ERICSSON TELEFON AB L M

    Inventor： RASMUSSON JIM ,  CHRISTENSSON NILS ,  PHILIPSSON JOHN

    IPC: H04R3/02 ,  H04B3/20 ,  H04M1/00 ,  H04M1/60 ,  H04M1/725 ,  H04M9/00 ,  H04M9/08 ,  H04Q7/38

    CPC classification number: H04M1/6091

    Abstract: To optimize the performance of a device, such as a mobile telephone, that may be coupled to any of a variety of hands-free adapters, each characterized by a particular quality of performance, the device receives self-identifying information from the particular hands-free adapter to which it is coupled. The device then determines one or more settings as a function of the self-identifying information, and adjusts one or more components in accordance with the one or more settings. For example, such adjustments may include microphone gain settings, loudspeaker gain settings, and adjustments to acoustic echo canceler equipment.

    Abstract translation: 为了优化诸如移动电话的设备的性能，其可以耦合到各种免提适配器中的任何一种，每个都具有特定的性能质量，该设备从特定的手机接收自身识别信息， 它所耦合的自由适配器。 然后，设备根据自身识别信息确定一个或多个设置，并根据一个或多个设置来调整一个或多个组件。 例如，这样的调整可以包括麦克风增益设置，扬声器增益设置和对声学回波消除器设备的调整。

    Methods and apparatus for improving adaptive filter initialization and recovery in bi-directional communications systems
    5.
    发明专利
    Methods and apparatus for improving adaptive filter initialization and recovery in bi-directional communications systems 未知

    公开(公告)号：AU4923000A

    公开(公告)日：2000-12-05

    申请号：AU4923000

    申请日：2000-05-16

    Applicant: ERICSSON TELEFON AB L M

    Inventor： CHRISTENSSON NILS ,  PHILIPSSON JOHN

    IPC: H04B3/23 ,  H04M9/08

    Abstract: In methods and apparatus for echo cancellation, a noise estimate is selectively added to a downlink communications signals to improve the convergence speed and stability of an echo-canceling adaptive filter. The added signal content enables the echo-canceling adaptive filter to more quickly track echo path changes during user communications and prevents divergence of the adaptive filter during periods in which the downlink signal does not contain information (e.g., speech) sufficient to develop a quality echo path estimate. To prevent performance degradation from a user perspective, the added noise is made to resemble existing system noise (e.g., either near-end or far-end background noise). In exemplary embodiments, filter convergence speed and stability are further improved by whitening the spectrum and increasing the power level of the added noise whenever a near-end user is active and masking the added noise.

    7.
    发明专利
    未知

    公开(公告)号：DE60023515D1

    公开(公告)日：2005-12-01

    申请号：DE60023515

    申请日：2000-07-28

    Applicant: ERICSSON TELEFON AB L M

    Inventor： LINDGREN ULF ,  MISRA MOHAN ,  PHILIPSSON JOHN

    IPC: H04B3/21 ,  H04B3/23 ,  G10L21/02 ,  H04B7/015 ,  H04M1/00 ,  H04M1/60 ,  H04M9/08

    Abstract: An echo cancellation device (ECD) comprises an echo canceller (EC) including a transfer function estimator (EST, H) and a subtractor (ADD) and a residual echo suppression device (G, ADD2). The residual echo suppression device (G) comprises a residual echo filter (G) having an adjustable filter function (g). This filter function (g) can be adapted to either remove from the subtractor output (TNE') the spectral characteristics relating to the reception signal (RFE) and/or to emphasize in the subtractor output signal (TNE') a background signal spectral content relating to the transmission signal (TNE). A noise generation means (NGM') can be provided at the output of the adaptable filter (G) for injecting a noise process in to the filter output signal (TNE') prior to a speech coding in a speech coder (COD). The noise process masks in the filter output signal a spectral content relating to the reception signal (RFE).

    8.
    发明专利
    未知

    公开(公告)号：AT288169T

    公开(公告)日：2005-02-15

    申请号：AT00931183

    申请日：2000-05-10

    Applicant: ERICSSON TELEFON AB L M

    Inventor： PHILIPSSON JOHN ,  RASMUSSON JIM

    IPC: H04R3/02 ,  H04B3/20 ,  H04M1/60 ,  H04M9/08 ,  H04R5/02

    Abstract: The present invention relates to a loudspeaker volume control arrangement for a telephone having a loudspeaker and a microphone which controls the loudspeaker volume of the telephone based on the estimated distance between the microphone and the loudspeaker.

    Echo cancellation device for cancelling echos in a transceiver unit
    9.
    发明专利
    Echo cancellation device for cancelling echos in a transceiver unit 未知

    公开(公告)号：AU6160800A

    公开(公告)日：2001-02-19

    申请号：AU6160800

    申请日：2000-07-28

    Applicant: ERICSSON TELEFON AB L M

    Inventor： LINDGREN ULF ,  MISRA MOHAN ,  PHILIPSSON JOHN

    IPC: G10L21/02 ,  H04B3/21 ,  H04B3/23 ,  H04B7/015 ,  H04M1/00 ,  H04M1/60 ,  H04M9/08 ,  H04M9/00

    Abstract: An echo cancellation device (ECD) comprises an echo canceller (EC) including a transfer function estimator (EST, H) and a subtractor (ADD) and a residual echo suppression device (G, ADD2). The residual echo suppression device (G) comprises a residual echo filter (G) having an adjustable filter function (g). This filter function (g) can be adapted to either remove from the subtractor output (TNE') the spectral characteristics relating to the reception signal (RFE) and/or to emphasize in the subtractor output signal (TNE') a background signal spectral content relating to the transmission signal (TNE). A noise generation means (NGM') can be provided at the output of the adaptable filter (G) for injecting a noise process in to the filter output signal (TNE') prior to a speech coding in a speech coder (COD). The noise process masks in the filter output signal a spectral content relating to the reception signal (RFE).

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