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公开(公告)号：EP0973151B1
公开(公告)日：2008-10-29
申请号：EP99113651.6
申请日：1999-07-14
IPC分类号： G10K11/178
CPC分类号： G10K11/178 , G10K2210/3012 , G10K2210/3027 , G10K2210/3039
摘要： A noise control system includes: a control sound generator (1) for generating a control sound; an error detector (2) for detecting an error signal between the control sound and noise; a noise detector (3) for detecting a noise source signal; an adaptive filter (4) for outputting a control signal; and a coefficient updator for updating a coefficient of the adaptive filter (4). The coefficient updator includes at least a first digital filter (5), a first coefficient update calculator (6), a second digital filter (7), a phase inverter (10), a third digital filter (8), and a second coefficient update calculator (9). Alternatively, the coefficient updator includes at least a first digital filter, a second digital filter, a third digital filter, a coefficient update calculator, a phase inverter, a first adder, and a second adder. In either case, the coefficient updator has a function of suppressing an increase in a coefficient gain of the adaptive filter in a predetermined frequency band.
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公开(公告)号：EP0973151A3
公开(公告)日：2003-01-02
申请号：EP99113651.6
申请日：1999-07-14
IPC分类号： G10K11/178
CPC分类号： G10K11/178 , G10K2210/3012 , G10K2210/3027 , G10K2210/3039
摘要： A noise control system includes: a control sound generator (1) for generating a control sound; an error detector (2) for detecting an error signal between the control sound and noise; a noise detector (3) for detecting a noise source signal; an adaptive filter (4) for outputting a control signal; and a coefficient updator for updating a coefficient of the adaptive filter (4). The coefficient updator includes at least a first digital filter (5), a first coefficient update calculator (6), a second digital filter (7), a phase inverter (10), a third digital filter (8), and a second coefficient update calculator (9). Alternatively, the coefficient updator includes at least a first digital filter, a second digital filter, a third digital filter, a coefficient update calculator, a phase inverter, a first adder, and a second adder. In either case, the coefficient updator has a function of suppressing an increase in a coefficient gain of the adaptive filter in a predetermined frequency band.
摘要翻译： 噪声控制系统包括：用于产生控制声音的控制声音发生器（1）; 用于检测控制声音和噪声之间的误差信号的误差检测器（2）; 噪声检测器（3），用于检测噪声源信号; 用于输出控制信号的自适应滤波器（4） 以及用于更新自适应滤波器（4）的系数的系数更新器。 系数更新器至少包括第一数字滤波器（5），第一系数更新计算器（6），第二数字滤波器（7），相位逆变器（10），第三数字滤波器（8）和第二系数 更新计算器（9）。 或者，系数更新器至少包括第一数字滤波器，第二数字滤波器，第三数字滤波器，系数更新计算器，相位逆变器，第一加法器和第二加法器。 在这两种情况下，系数更新器具有抑制预定频带中的自适应滤波器的系数增益的增加的功能。
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公开(公告)号：EP1223572A2
公开(公告)日：2002-07-17
申请号：EP01128925.3
申请日：2001-12-05
IPC分类号： G10K11/178
CPC分类号： G10K11/178
摘要： A first rectifying net, a rectifying grid and a second rectifying net are attached, as a rectifying part upstream of a duct through which air for cooling flows. A noise detection microphone detects noise within the duct. An error detection microphone is placed in the downstream side of the noise to detect error noise. An arithmetic circuit inputs a noise signal of the noise detection microphone, carries out an arithmetic of a transfer function so that an output signal of the error detection microphone becomes minimum, and outputs a control signal to a control sound source. The control sound source radiates a control sound having approximately the same sound pressure as and an opposite phase of the noise within the duct. Thus, the coherence between the noise in the upstream and downstream parts increases, thereby enhancing a sound-muffling effect.
摘要翻译： 第一整流网，整流电网和第二整流网，作为用于冷却空气的管道上游的整流部件。 噪声检测麦克风检测管道内的噪声。 误差检测麦克风放置在噪声的下游侧，以检测误差噪声。 算术电路输入噪声检测麦克风的噪声信号，执行传递函数的算术，使得误差检测麦克风的输出信号变得最小，并将控制信号输出到控制声源。 控制声源辐射具有与管道内的噪声大致相同的声压和相反相位的控制声音。 因此，上游和下游部分的噪声之间的相干性增加，从而增强声音消声效果。
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公开(公告)号：EP0590350A2
公开(公告)日：1994-04-06
申请号：EP93114166.7
申请日：1993-09-03
IPC分类号： G10K11/16
CPC分类号： G10K11/178 , G10K2210/1282 , G10K2210/3012 , G10K2210/3032 , G10K2210/3045
摘要： An active noise controller includes a prediction filter which comprises a delayer (3) for delaying the noise or error detection signal by a predetermined period of time, a first adaptive filter (4) for processing the output of the delayer to deliver its periodic component, and a subtractor (14) for subtracting the output of the first adaptive filter (4) from the noise detection signal to deliver a random component of the signal. More specifically, the prediction filter is capable of dividing the noise or error detection signal into two, periodic and random, components. In addition, two, second and third, adaptive filters (5,6) are provided for processing the periodic and random components respectively. Accordingly, the second and third adaptive filters (5,6) become responsive precisely to their respective periodic and random components regardless of the ratio in level between the two components, whereby any undesired noise consisting of the two discrete components will be suppressed.
摘要翻译： 有源噪声控制器包括预测滤波器，该预测滤波器包括用于将噪声或误差检测信号延迟预定时间段的延迟器，用于处理延迟器的输出以递送其周期性分量的第一自适应滤波器，以及减法器 从噪声检测信号输出第一自适应滤波器以递送该信号的随机分量。 更具体地，预测滤波器能够将噪声或误差检测信号分成两个，周期性和随机的分量。 另外，提供两个，第二和第三个自适应滤波器用于分别处理周期性和随机分量。 因此，第二和第三自适应滤波器对于它们各自的周期性和随机分量而言都是精确地响应，而与两个分量之间的电平之比无关，由此将抑制由两个分立组件组成的任何不期望的噪声。
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公开(公告)号：EP1204276A3
公开(公告)日：2007-01-03
申请号：EP01123318.6
申请日：2001-10-08
CPC分类号： H04N21/44004 , G06F3/05 , H04N21/4302
摘要： A digital AV signal processing apparatus includes a buffer for storing digital data input to the digital AV signal processing apparatus, and outputting the digital data as output digital data, a D/A converter for converting the output digital data to analog data, a voltage-controlled oscillator for generating a clock signal to control a conversion rate of the D/A converter, and a voltage-controlled oscillator controller for detecting a data amount of the digital data stored in the buffer, and controlling a frequency of the clock signal based on a deviation in the detected data amount from a first predetermined value and a time integral of the deviation value.
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公开(公告)号：EP1370115A2
公开(公告)日：2003-12-10
申请号：EP03012415.0
申请日：2003-05-30
IPC分类号： H04S7/00
CPC分类号： H04S3/008 , H04R2499/13 , H04S1/002 , H04S3/00
摘要： To provide a sound image control system able to concurrently perform sound image localization control for two persons. The present invention is directed to a sound image control system controlling a sound image localization position by reproducing an audio signal from a plurality of loudspeakers. The sound image control system includes at least four loudspeakers for reproducing the audio signal and a signal processing section. The signal processing section sets four points corresponding to both ears of two listeners as control points, and performs signal processing for the audio signal input into the plurality of loudspeakers so that two target sound source positions indicating sound image localization positions of the respective two listeners are set in the same direction with respect to the two listeners. Here, the two target sound source positions are set so as to satisfy a following condition, T1
摘要翻译： 提供能够同时对两人进行声像定位控制的声像控制系统。 本发明涉及一种通过再现来自多个扬声器的音频信号来控制声像定位位置的声音图像控制系统。 声音图像控制系统包括用于再现音频信号的至少四个扬声器和信号处理部分。 信号处理部分将与两个听众的双耳相对应的四个点作为控制点，并且对输入到多个扬声器中的音频信号执行信号处理，使得指示相应两个听众的声音图像定位位置的两个目标声源位置是 相对于两个听众设置在相同的方向。 这里，两个目标声源位置被设定为满足以下条件：T1
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公开(公告)号：EP0517525A3
公开(公告)日：1993-12-08
申请号：EP92305138.7
申请日：1992-06-04
IPC分类号： G10K11/16
CPC分类号： G10K11/178 , G10K2210/3012 , G10K2210/3028 , G10K2210/3045
摘要： Disclosed is a noise suppressor in which a noise signal detected by a first detector (1 a ) is inputted to an adaptive filter (2) and a FIR filter (3). An output signal of the adaptive filter is reproduced by a speaker (5). The reproduced signal by the speaker (5) and a noise signal from a noise source are detected by a second detector (1 b ). The detected signal by the second detector is band-limited by a filter circuit (6) and sent to a LMS computing circuit (4). The LMS computing circuit (4) updates a coefficient of the adaptive filter (2) so as to minimize an output signal (e'(n)) of the filter circuit (6) in response to an output signal (r(n)) of the FIR filter (3) and an output signal (e'(n)) of the filter circuit (6).
摘要翻译： 公开了一种噪声抑制器，其中由第一检测器检测的噪声信号被输入到自适应滤波器和FIR滤波器。 自适应滤波器的输出信号由扬声器再现。 扬声器的再现信号和来自噪声源的噪声信号由第二检测器检测。 由第二检测器检测到的信号被滤波器电路限幅并发送到LMS计算电路。 LMS计算电路更新自适应滤波器的系数，以便响应于FIR滤波器的输出信号和滤波器电路的输出信号使滤波器电路的输出信号最小化。
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公开(公告)号：EP0461801A3
公开(公告)日：1992-11-25
申请号：EP91305066.2
申请日：1991-06-05
CPC分类号： H04R3/005 , G10K11/178 , G10K2210/1053 , G10K2210/108 , G10K2210/1282 , G10K2210/3041 , G10K2210/3045 , G10K2210/3225 , G10K2210/503
摘要： A noise suppressor is disclosed in which a noise signal is detected by a first detector, then processed by an adaptive filter, and an output signal from the adaptive filter and an audio signal from audio equipment are added by an adder and reproduced by a speaker. The sound signal thus reproduced by the speaker and the noise signal are detected by a second detector located at a listening point and sent to a filter control circuit. The filter control circuit processes the signal sent from the second detector and the audio signal from the audio equipment having a transfer function from the adder to the filter control circuit convoluted thereby to remove the audio signal component therefrom. The adaptive filter adaptively controls the noise signal in response to the output signal from the filter control circuit.
摘要翻译： 公开了一种噪声抑制器，其中由第一检测器检测噪声信号，然后由自适应滤波器处理，并且来自自适应滤波器的输出信号和来自音频设备的音频信号由加法器相加并由扬声器再现。 由扬声器再现的声音信号和噪声信号由位于收听点处的第二检测器检测并发送到滤波器控制电路。 滤波器控制电路将来自第二检测器的信号和来自具有传递函数的音频设备的音频信号从加法器处理到由此卷积的滤波器控制电路，从而从其去除音频信号分量。 自适应滤波器响应于来自滤波器控制电路的输出信号自适应地控制噪声信号。
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公开(公告)号：EP0756407B1
公开(公告)日：2007-12-26
申请号：EP96111853.6
申请日：1996-07-23
IPC分类号： H04M1/19 , G10K11/178 , H04R3/00
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公开(公告)号：EP1194006A3
公开(公告)日：2007-04-25
申请号：EP01122712.1
申请日：2001-09-21
IPC分类号： H04S1/00
CPC分类号： H04S1/005
摘要： A signal processing apparatus for processing an acoustic signal reproduced together with an image signal includes a memory for storing a plurality of filter coefficients for correcting the acoustic signal; a filter coefficient selection section for receiving a correction command for specifying a correction method for the acoustic signal from outside the signal processing apparatus and selecting at least one of the plurality of filter coefficients stored in the memory based on the correction command; and a correction section for correcting the acoustic signal using the at least one filter coefficient selected by the filter coefficient selection section.
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