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    Echo reduction system
    2.
    发明授权
    Echo reduction system 有权
    回波减速系统

    公开(公告)号：US08111840B2

    公开(公告)日：2012-02-07

    申请号：US11788069

    申请日：2007-04-18

    申请人： Tim Haulick ,  Gerhard Uwe Schmidt ,  Martin Roessler

    发明人： Tim Haulick ,  Gerhard Uwe Schmidt ,  Martin Roessler

    IPC分类号： H04B15/00 ,  H04R3/00 ,  H04R27/00 ,  H04R25/00 ,  G10L15/20

    CPC分类号： H04M9/082

    摘要： A system for reducing an echo and/or a residual echo in a microphone output signal includes an echo compensation filter configured to receive audio input signals and generate an estimated echo signal. A speech activity detector is configured to detect speech of a local speaker, and a combining circuit is configured to generate an echo compensated signal by subtracting the estimated echo signal from the microphone output signal. A residual echo reduction circuit is configured to suppress the residual echo in the echo compensated signal based on the detected speech activity, and output an echo suppressed output signal. The echo reduction system may reduce local background noise and residual echoes in a microphone output signal so that local speech may be transmitted free from undesirable signals.

    摘要翻译： 用于减少麦克风输出信号中的回波和/或残留回声的系统包括被配置为接收音频输入信号并产生估计的回波信号的回波补偿滤波器。 语音活动检测器被配置为检测本地扬声器的语音，并且组合电路被配置为通过从麦克风输出信号减去估计的回波信号来产生回波补偿信号。 残余回波降低电路被配置为基于检测到的语音活动来抑制回波补偿信号中的残留回波，并输出回波抑制输出信号。 回波减少系统可以减少麦克风输出信号中的本地背景噪声和残留回波，使得可以从不期望的信号中传送本地语音。

    Multi-channel echo compensation system
    3.
    发明授权
    Multi-channel echo compensation system 有权
    多通道回波补偿系统

    公开(公告)号：US08130969B2

    公开(公告)日：2012-03-06

    申请号：US11787348

    申请日：2007-04-16

    申请人： Markus Buck ,  Tim Haulick ,  Martin Roessler ,  Gerhard Uwe Schmidt

    发明人： Markus Buck ,  Tim Haulick ,  Martin Roessler ,  Gerhard Uwe Schmidt

    IPC分类号： H04B3/20 ,  H04B15/00

    CPC分类号： H04M9/082 ,  H04R3/02 ,  H04R2499/13

    摘要： An echo compensation system may remove undesirable audio signals. The echo compensation system may utilize adaptive filters to remove echoes and undesirable signals received by a microphone. The echo compensation system may inhibit adaptation of an adaptive filter when left and right channel audio signals are highly correlated. In a two-channel system, inhibiting adaptation of one of two adaptive filters may reduce computational power requirements, while still removing undesirable signals. In a four-channel system, inhibiting adaptation of all but one of the four adaptive filters may reduce computational power requirements by a greater percentage.

    摘要翻译： 回波补偿系统可以去除不需要的音频信号。 回波补偿系统可以利用自适应滤波器去除由麦克风接收的回波和不期望的信号。 当左右声道音频信号高度相关时，回波补偿系统可以抑制自适应滤波器的自适应。 在双通道系统中，禁止两个自适应滤波器之一的适配可以减少计算能力需求，同时仍然消除不需要的信号。 在四通道系统中，禁止四个自适应滤波器中除了一个之外的所有适配器可以将计算能力要求降低更多的百分比。

    BACKGROUND NOISE REDUCTION SYSTEM
    5.
    发明申请
    BACKGROUND NOISE REDUCTION SYSTEM 有权
    背景噪声减少系统

    公开(公告)号：US20080027722A1

    公开(公告)日：2008-01-31

    申请号：US11767803

    申请日：2007-06-25

    申请人： Tim Haulick ,  Martin Roessler ,  Klaus Haindl

    发明人： Tim Haulick ,  Martin Roessler ,  Klaus Haindl

    IPC分类号： G10L21/02

    CPC分类号： G10L21/0208

    摘要： A noise reduction system includes a microphone configured to detect an acoustic signal. A first digitizer converts an output of the microphone into a discrete output signal. An acoustic sensor detects structure-borne noise, and a second digitizer converts an output of the acoustic sensor into a discrete acoustic noise reference signal. A noise compensation circuit processes the discrete output signal based on the discrete acoustic noise reference signal.

    摘要翻译： 降噪系统包括被配置为检测声信号的麦克风。 第一数字转换器将麦克风的输出转换为离散输出信号。 声学传感器检测结构噪声，第二数字转换器将声学传感器的输出转换成离散声学噪声参考信号。 噪声补偿电路基于离散噪声参考信号处理离散输出信号。

    Background noise reduction system
    6.
    发明授权
    Background noise reduction system 有权
    背景降噪系统

    公开(公告)号：US07930175B2

    公开(公告)日：2011-04-19

    申请号：US11767803

    申请日：2007-06-25

    申请人： Tim Haulick ,  Martin Roessler ,  Klaus Alois Haindl

    发明人： Tim Haulick ,  Martin Roessler ,  Klaus Alois Haindl

    IPC分类号： G10L21/02

    CPC分类号： G10L21/0208

    摘要： A noise reduction system includes a microphone configured to detect an acoustic signal. A first digitizer converts an output of the microphone into a discrete output signal. An acoustic sensor detects structure-borne noise, and a second digitizer converts an output of the acoustic sensor into a discrete acoustic noise reference signal. A noise compensation circuit processes the discrete output signal based on the discrete acoustic noise reference signal.

    摘要翻译： 降噪系统包括被配置为检测声信号的麦克风。 第一数字转换器将麦克风的输出转换为离散输出信号。 声学传感器检测结构噪声，第二数字转换器将声学传感器的输出转换成离散声学噪声参考信号。 噪声补偿电路基于离散噪声参考信号处理离散输出信号。

    Echo reduction system
    8.
    发明申请
    Echo reduction system 有权
    回波减速系统

    公开(公告)号：US20080031467A1

    公开(公告)日：2008-02-07

    申请号：US11788069

    申请日：2007-04-18

    申请人： Tim Haulick ,  Gerhard Schmidt ,  Martin Roessler

    发明人： Tim Haulick ,  Gerhard Schmidt ,  Martin Roessler

    IPC分类号： H04B3/20

    CPC分类号： H04M9/082

    摘要： The present invention relates to a method for reducing an echo in a microphone signal generated by a microphone, comprising echo compensating the microphone signal by subtracting an estimated echo signal from the microphone signal to generate an echo compensated signal, detecting a speech activity of a local speaker on the basis of the microphone signal and the estimated echo signal and suppressing a residual echo in the echo compensated signal on the basis of the detected speech activity to obtain an output signal. The invention further relates to a system for processing a microphone signal generated by a microphone, comprising echo compensation filtering means configured to receive and echo compensate the microphone signal to output an echo compensated signal based on the received microphone signal, a speech activity detection means configured to detect speech activity of a local speaker by receiving and analyzing the echo compensated signal and to output a detection signal and a residual echo suppressing means configured to receive the detection signal and to receive and filter the echo compensated signal on the basis of the detection signal to output an output signal.

    摘要翻译： 本发明涉及一种用于减少由麦克风产生的麦克风信号中的回波的方法，包括通过从麦克风信号中减去估计的回波信号来补偿麦克风信号的回波，以产生回波补偿信号，检测本地的话音活动 基于所述麦克风信号和所述估计回波信号，基于检测到的语音活动抑制所述回波补偿信号中的残留回波，以获得输出信号。 本发明还涉及一种用于处理由麦克风产生的麦克风信号的系统，包括：回波补偿滤波装置，被配置为接收和回波补偿麦克风信号，以基于接收到的麦克风信号输出回波补偿信号;配置的语音活动检测装置 通过接收和分析回波补偿信号来检测本地扬声器的语音活动，并输出检测信号和残余回声抑制装置，被配置为接收检测信号，并且基于检测信号接收和滤波回波补偿信号 输出输出信号。

    Multi-channel echo compensation system
    9.
    发明申请
    Multi-channel echo compensation system 有权
    多通道回波补偿系统

    公开(公告)号：US20080031466A1

    公开(公告)日：2008-02-07

    申请号：US11787348

    申请日：2007-04-16

    申请人： Markus Buck ,  Tim Haulick ,  Martin Roessler ,  Gerhard Schmidt

    发明人： Markus Buck ,  Tim Haulick ,  Martin Roessler ,  Gerhard Schmidt

    IPC分类号： H04B3/20

    CPC分类号： H04M9/082 ,  H04R3/02 ,  H04R2499/13

    摘要： The invention is directed to a multi-channel echo compensation system, comprising two loudspeaker input channels, each loudspeaker input channel being connected to a loud-speaker for providing a loudspeaker input signal to be emanated by the loudspeaker, a microphone output channel being connected to at least one microphone for receiving a microphone output signal from the at least one microphone, wherein each microphone is configured to acquire a signal emanating from the loudspeakers, a compensation channel for each loudspeaker input channel, each compensation channel connecting a respective loudspeaker input channel and the microphone output channel, an adaptive compensation filter for each compensation channel, wherein each adaptive compensation filter is configured to filter a signal on the respective compensation channel such that a compensation output signal is provided to compensate a microphone output signal for a signal emanating from the loudspeakers, a pre-processing means for pre-processing loudspeaker input signals on the compensation channels, the pre-processing means being configured to determine a correlation value of the loudspeaker input signals for the two loudspeakers according to a pre-determined criterion and to de-activate one of the adaptive compensation filters if the determined correlation value passes a pre-determined threshold.

    摘要翻译： 本发明涉及一种多通道回波补偿系统，包括两个扬声器输入通道，每个扬声器输入通道连接到扬声器，用于提供由扬声器发出的扬声器输入信号;麦克风输出通道连接到 至少一个麦克风，用于从所述至少一个麦克风接收麦克风输出信号，其中每个麦克风被配置为获取从扬声器发出的信号，每个扬声器输入通道的补偿通道，每个补偿通道连接相应的扬声器输入通道和 麦克风输出通道，用于每个补偿通道的自适应补偿滤波器，其中每个自适应补偿滤波器被配置为对相应补偿通道上的信号进行滤波，使得提供补偿输出信号以补偿麦克风输出信号，以产生从 扬声器，预处理手段 用于在补偿通道上预处理扬声器输入信号，预处理装置被配置为根据预定准则确定两个扬声器的扬声器输入信号的相关值，并且去激活自适应补偿中的一个 如果确定的相关值通过预定阈值，则滤波器。