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    • 3. 发明申请
    • Feedback Sound Eliminating Apparatus
    • 反馈消声装置
    • US20080273716A1
    • 2008-11-06
    • US11667623
    • 2006-03-29
    • Kosuke SaitoTakurou SoneRyo TanakaToshiaki IshibashiKatsuichi Osakabe
    • Kosuke SaitoTakurou SoneRyo TanakaToshiaki IshibashiKatsuichi Osakabe
    • H04B15/00
    • H04M9/082
    • A control unit gives acoustic environment instruction data to a picked up sound directionality control unit and an adaptive filter. According to this, the picked up sound directionality control unit generates a picked up sound signal constituted by a predetermined picked up sound directionality. The adaptive filter detects the picked up sound directionality from the acoustic environment instruction data, and reads out the filter parameter corresponding to this picked up sound directionality, from a memory. The adaptive filter sets a delay coefficient and a filter coefficient of an FIR filter, and generates a pseudo echo signal by an impulse response with respect to the received sound signal. Based on an error signal obtained by subtracting the pseudo echo signal from the picked up sound signal by an adder, the adaptive filter sets a more optimum filter parameter, and generates the next pseudo echo signal.
    • 控制单元向拾取的声音方向性控制单元和自适应滤波器提供声环境指令数据。 据此,所拾取的声音方向性控制单元产生由预定拾取声音方向性构成的拾取声音信号。 自适应滤波器从声环境指令数据检测拾取声方向性,并从存储器读出对应于该拾取声方向性的滤波器参数。 自适应滤波器设置FIR滤波器的延迟系数和滤波器系数,并且通过相对于接收到的声音信号的脉冲响应来产生伪回波信号。 基于通过加法器从拾取声音信号中减去伪回波信号而获得的误差信号,自适应滤波器设置更优化的滤波器参数,并生成下一个伪回波信号。
    • 6. 发明授权
    • Voice emitting and collecting device
    • 语音发射和收集装置
    • US08447590B2
    • 2013-05-21
    • US12306413
    • 2007-06-20
    • Toshiaki IshibashiRyo TanakaSatoshi Ukai
    • Toshiaki IshibashiRyo TanakaSatoshi Ukai
    • G10L11/00
    • H04R3/005H04M3/56H04M3/568H04M2201/18H04R1/406H04R2201/403H04R2430/20
    • A voice emitting and collecting device that is capable of picking up/outputting a voice emitted from a talker at a high S/N ratio by eliminating the influence of a diffracting voice despite a simple configuration is provided. A signal differencing circuit 191 outputs difference signals MS1 to MS4 between voice collecting beam signals MB11 to MB14 and voice collecting beam signals MB21 to MB24. A level comparator 195 selects the difference signal having a maximum level. A signal selecting circuit 196 selects voice collecting beam signals MB1x, MB2x of the difference signal MS that is selected/pointed by the level comparator 195. A subtracter 199 subtracts the voice collecting beam signal MB2x from the voice collecting beam signal MB1x, and output a resultant signal. Accordingly, main components of the diffracting voice can be removed from the voice collecting beam signal.
    • 提供了一种语音发射和收集装置,其能够通过消除尽管简单配置的衍射语音的影响,以高S / N比来拾取/输出从讲话者发出的语音。 信号差分电路191输出语音采集束信号MB11〜MB14和声音采集束信号MB21〜MB24之间的差信号MS1〜MS4。 电平比较器195选择具有最大电平的差分信号。 信号选择电路196选择由电平比较器195选择/指示的差分信号MS的语音采集束信号MB1x,MB2x。减法器199从语音采集束信号MB1x中减去语音采集束信号MB2x,并输出 结果信号。 因此,可以从声音采集束信号中去除衍射声音的主要成分。
    • 10. 发明申请
    • AUDIO SIGNAL TRANSMISSION/RECEPTION DEVICE AND MICROPHONE APPARATUS THEREOF
    • 音频信号传输/接收设备及其麦克风设备
    • US20080260178A1
    • 2008-10-23
    • US12108593
    • 2008-04-24
    • Ryo Tanaka
    • Ryo Tanaka
    • H04R1/00
    • H04R1/403H04R1/406H04R2201/403H04R2201/405
    • An audio signal transmission/reception device includes a speaker array having a plurality of linearly arranged speaker units and a microphone apparatus having a microphone array having a plurality of linearly arranged microphone units. Some of the microphone units are aligned with equal spacing corresponding to a prescribed distance therebetween in a high-density alignment section, which is set symmetrical to an alignment origin corresponding to a center point of linear alignment. The remaining microphone units are aligned in a low-density alignment section externally of the high-density alignment section in such a way that the spacing therebetween is progressively widened integer times larger than the prescribed distance. Manufacturing costs can be reduced by reducing the total number of the microphone units, and it is possible to improve sound reception directivity with respect to both high and low frequency bands.
    • 音频信号发送/接收装置包括具有多个线性排列的扬声器单元的扬声器阵列和具有多个线性排列麦克风单元的麦克风阵列的麦克风装置。 一些麦克风单元在对应于与对应于线性对准中心点的对准原点对称的高密度对准部分中对应于其间的规定距离的相等间隔对准。 剩余的麦克风单元在高密度校准部分外部的低密度校准部分中对准,使得它们之间的间隔逐渐加宽到大于规定距离的整数倍。 可以通过减少麦克风单元的总数来减少制造成本,并且可以提高相对于高频带和低频带的声音接收方向性。