公开(公告)号：US20110058684A1

公开(公告)日：2011-03-10

申请号：US12991478

申请日：2008-05-27

申请人： Yoshiki Ohta ,  Kensaku Obata

发明人： Yoshiki Ohta ,  Kensaku Obata

IPC分类号： H04R1/40

CPC分类号： H04S1/00 ,  H04R2499/13

摘要： An audio reproduction device reproduces a one-channel signal from two speakers arranged in a sound field. The one-channel input signal is delayed by a delay element. The delay element performs a delay with different delay amount for a plurality of frequency bands. The signal delayed by the delay element is outputted to one of the two speakers and the input signal is directly outputted to the other one of the two speakers.

摘要翻译： 音频再现装置再现来自布置在声场中的两个扬声器的单声道信号。 单通道输入信号被延迟元件延迟。 延迟元件对于多个频带执行具有不同延迟量的延迟。 由延迟元件延迟的信号被输出到两个扬声器中的一个，并且输入信号被直接输出到两个扬声器中的另一个。

公开(公告)号：US20120300955A1

公开(公告)日：2012-11-29

申请号：US13578727

申请日：2010-02-15

申请人： Akihiro Iseki ,  Yoshiki Ohta ,  Yoshitomo Imanishi ,  Kensaku Obata

发明人： Akihiro Iseki ,  Yoshiki Ohta ,  Yoshitomo Imanishi ,  Kensaku Obata

IPC分类号： G10K11/36

CPC分类号： G10K11/1786 ,  G10K11/178 ,  G10K2210/12821 ,  H04R3/02

摘要： An active vibration noise control device cancels vibration noise by making plural speakers generate control sounds. The active vibration noise control device selects one or more speakers which output the control sounds, from plural speakers, based on a relationship between (1) a first phase difference which corresponds to a difference between phase characteristics of the vibration noise from a vibration noise source to an evaluation point and phase characteristics of the vibration noise from the vibration noise source to a pseudo evaluation point and (2) a second phase difference for each of the plural speakers corresponding to a difference between phase characteristics of the control sound from the speaker to the evaluation point and phase characteristics of the control sound from the speaker to the pseudo evaluation point. Therefore, it stably decreases the vibration noise at the pseudo evaluation point independently of a frequency band of the vibration noise.

摘要翻译： 主动振动噪声控制装置通过使多个扬声器产生控制声音来消除振动噪声。 主动振动噪声控制装置根据（1）对应于来自振动噪声源的振动噪声的相位特性之差的第一相位差之间的关系，从多个扬声器中选择输出控制声音的一个或多个扬声器 涉及从振动噪声源到伪评估点的振动噪声的评估点和相位特性，以及（2）对应于来自扬声器的控制声音的相位特性之间的差异的多个扬声器中的每一个的第二相位差 控制声音从扬声器到伪评估点的评估点和相位特性。 因此，独立于振动噪声的频带，可以稳定地降低伪评估点的振动噪声。

公开(公告)号：US20090232321A1

公开(公告)日：2009-09-17

申请号：US11994067

申请日：2006-06-14

申请人： Yoshiki Ohta ,  Kensaku Obata

发明人： Yoshiki Ohta ,  Kensaku Obata

IPC分类号： H03G3/00

CPC分类号： H04S5/02

摘要： An audio signal processing apparatus includes a cutout unit, a correlation calculating unit, a spectrum calculating unit, a coefficient calculating unit, and an assigning unit. The cutout unit cuts out audio signals of plural channels by a time frame. The correlation calculating unit calculates a correlation value between respective signals of the plural channels included in a predetermined time frame cut out by the cutout unit. The spectrum calculating unit calculates spectrum information indicative of spectral characteristics concerning a signal of a given channel cut out by the cutout unit. The coefficient calculating unit calculates a coefficient to be multiplied by the signal of the given channel, based on the correlation value and the spectrum information. The assigning unit multiplies the coefficient by the signal of the given channel and assigns the multiplied signal to channels other than the given channel.

摘要翻译： 音频信号处理装置包括切出单元，相关计算单元，频谱计算单元，系数计算单元和分配单元。 切出单元按时间间隔切出多个频道的音频信号。 相关计算单元计算由切出单元切出的预定时间帧中包括的多个频道的各个信号之间的相关值。 频谱计算单元计算指示关于由切出单元切出的给定频道的信号的频谱特性的频谱信息。 系数计算单元基于相关值和频谱信息来计算要乘以给定信道的信号的系数。 分配单元将系数乘以给定信道的信号，并将相乘的信号分配给除了给定信道之外的信道。

公开(公告)号：US09484010B2

公开(公告)日：2016-11-01

申请号：US13977253

申请日：2011-01-06

申请人： Manabu Nohara ,  Yoshiki Ohta ,  Kensaku Obata ,  Yusuke Soga

发明人： Manabu Nohara ,  Yoshiki Ohta ,  Kensaku Obata ,  Yusuke Soga

IPC分类号： G10K11/178

CPC分类号： G10K11/178 ,  G10K11/17883 ,  G10K2210/1282 ,  G10K2210/3023 ,  G10K2210/3028

摘要： An active vibration noise control device obtains error signals corresponding to a cancellation error between vibration noise and control sounds generated by multiple speakers, from microphone(s), and actively controls the vibration noise. A basic signal generating unit generates a basic signal based on a vibration noise frequency. An adaptive notch filter unit generates control signals provided to each of the multiple speakers by applying a filter coefficient to the basic signal. A reference signal generating unit generates a reference signal from the basic signal based on multiple transfer characteristics from the multiple speakers to the one or more microphones. A filter coefficient updating unit updates the filter coefficient used by the adaptive notch filter unit so as to minimize the error signals. A controlling unit changes amplitude of the control signals of the speakers based on a similarity between the transfer characteristics and characteristics of the vibration noise.

摘要翻译： 主动振动噪声控制装置从麦克风获得对应于由多个扬声器产生的振动噪声和控制声之间的抵消误差的误差信号，并且主动地控制振动噪声。 基本信号生成单元基于振动噪声频率生成基本信号。 自适应陷波滤波器单元通过对基本信号施加滤波器系数来产生提供给多个扬声器中的每一个的控制信号。 参考信号生成单元基于从多个扬声器到一个或多个麦克风的多个传送特性，从基本信号生成参考信号。 滤波器系数更新单元更新由自适应陷波滤波器单元使用的滤波器系数，以使误差信号最小化。 控制单元基于传递特性和振动噪声的特性之间的相似度来改变扬声器的控制信号的幅度。

公开(公告)号：US20130044891A1

公开(公告)日：2013-02-21

申请号：US13579042

申请日：2010-02-18

申请人： Kensaku Obata ,  Yoshiki Ohta ,  Yoshitomo Imanishi ,  Akihiro Iseki

发明人： Kensaku Obata ,  Yoshiki Ohta ,  Yoshitomo Imanishi ,  Akihiro Iseki

IPC分类号： H03B29/00

CPC分类号： G10K11/1786 ,  G10K11/178 ,  G10K2210/1282 ,  G10K2210/3056 ,  G10K2210/503

摘要： The disclosed active vibration noise control device is suitable for use in cancelling out vibration noise by outputting control noise from a plurality of speakers. When a vibration noise frequency is in a dip bandwidth, the active vibration noise control device alters the step size parameters used to update the filter coefficient at at least one filter coefficient update means from among a plurality of filter coefficient update means. Thus, the filter coefficient update speed can be retarded in unstable dip bandwidths, enabling loss in silencing effect which occurs during dip characteristics to be appropriately reduced.

摘要翻译： 所公开的主动振动噪声控制装置适用于通过从多个扬声器输出控制噪声来消除振动噪声。 当振动噪声频率处于倾斜带宽时，主动振动噪声控制装置从多个滤波器系数更新装置中改变用于更新至少一个滤波器系数更新装置的滤波器系数的步长参数。 因此，在不稳定的浸渍带宽中可以延迟滤波器系数更新速度，能够适当降低在浸渍特性期间发生的消音效应的损失。

公开(公告)号：US20120155651A1

公开(公告)日：2012-06-21

申请号：US13380404

申请日：2010-06-18

申请人： Kensaku Obata ,  Akihiro Iseki ,  Yoshiki Ohta

发明人： Kensaku Obata ,  Akihiro Iseki ,  Yoshiki Ohta

IPC分类号： H04R5/00

CPC分类号： H04S3/002

摘要： A sound field adjusting device reproduces signals from plural speaker pairs arranged in an acoustic space. The device supplies signals to the plural speakers, gives different delays for the respective frequency bands to the signals supplied to at least to a proximity speaker pair which is a speaker pair closest to a listening position among the plural speakers, and gives a delay of a constant delay amount regardless of the frequency band to the speaker pairs other than the speaker pair to which the delays of different delay amounts for the respective frequency bands are given. In this case, the sound field adjusting device does not perform level adjustment, and the sound field adjustment is performed by only adjusting the delay amounts. Therefore, deterioration of sound pressure balance at the position other than the listening position can be avoided, and sound pressure balance at the listening position improved.

摘要翻译： 声场调节装置再现来自布置在声学空间中的多个扬声器对的信号。 该装置向多个扬声器提供信号，给予至少提供给作为多个扬声器中最接近收听位置的扬声器对的接近扬声器对的信号的各个频带的不同延迟，并给出延迟 不考虑向给定各个频带的不同延迟量的延迟的扬声器对之外的扬声器对的频带的恒定延迟量。 在这种情况下，声场调整装置不进行电平调整，仅通过调整延迟量进行声场调整。 因此，可以避免在收听位置以外的位置处的声压平衡的恶化，并且提高收听位置的声压平衡。

公开(公告)号：US08300835B2

公开(公告)日：2012-10-30

申请号：US11994067

申请日：2006-06-14

申请人： Yoshiki Ohta ,  Kensaku Obata

发明人： Yoshiki Ohta ,  Kensaku Obata

IPC分类号： H01L29/00

CPC分类号： H04S5/02

摘要： An audio signal processing apparatus includes a cutout unit, a correlation calculating unit, a spectrum calculating unit, a coefficient calculating unit, and an assigning unit. The cutout unit cuts out audio signals of plural channels by a time frame. The correlation calculating unit calculates a correlation value between respective signals of the plural channels included in a predetermined time frame cut out by the cutout unit. The spectrum calculating unit calculates spectrum information indicative of spectral characteristics concerning a signal of a given channel cut out by the cutout unit. The coefficient calculating unit calculates a coefficient to be multiplied by the signal of the given channel, based on the correlation value and the spectrum information. The assigning unit multiplies the coefficient by the signal of the given channel and assigns the multiplied signal to channels other than the given channel.

摘要翻译： 音频信号处理装置包括切出单元，相关计算单元，频谱计算单元，系数计算单元和分配单元。 切出单元按时间间隔切出多个频道的音频信号。 相关计算单元计算由切出单元切出的预定时间帧中包括的多个频道的各个信号之间的相关值。 频谱计算单元计算指示关于由切出单元切出的给定频道的信号的频谱特性的频谱信息。 系数计算单元基于相关值和频谱信息来计算要乘以给定信道的信号的系数。 分配单元将系数乘以给定信道的信号，并将相乘的信号分配给除了给定信道之外的信道。

公开(公告)号：US20110268298A1

公开(公告)日：2011-11-03

申请号：US13141581

申请日：2008-12-25

申请人： Yoshitomo Imanishi ,  Yoshiki Ohta ,  Kensaku Obata ,  Akihiro Iseki

发明人： Yoshitomo Imanishi ,  Yoshiki Ohta ,  Kensaku Obata ,  Akihiro Iseki

IPC分类号： H04R5/00

CPC分类号： H04S7/00

摘要： At least two speakers are arranged in the left-right direction, and the measurement signal generating unit generates the measurement signal from the two speakers. The measurement signal outputting unit outputs the measurement signal. The measurement signal collecting unit collects the measurement signal for the left-right direction from at least two positions along the left-right direction axis in the acoustic space. The delay correcting unit performs the delay adjustment for any one of the speakers in the acoustic space, based on information that the measurement signal collecting unit obtains by collecting the measurement signal for the left-right direction, until the level difference in the left-right direction becomes equal to or smaller than the predetermined value. The sound field correcting device collects the measurement signal from two positions along the left-right direction axis, and reduces the level difference in the left-right direction based on the information obtained by collecting the sound.

摘要翻译： 至少两个扬声器被布置在左右方向上，并且测量信号产生单元从两个扬声器产生测量信号。 测量信号输出单元输出测量信号。 测量信号收集单元从声学空间中沿着左右方向轴的至少两个位置收集左右方向的测量信号。 延迟校正单元基于测量信号采集单元通过收集左右方向的测量信号获得的信息，对声学空间中的任何一个扬声器进行延迟调整，直到左右的水平差 方向变得等于或小于预定值。 声场校正装置从左右方向轴的两个位置收集测量信号，并且基于通过收集声音获得的信息来减小左右方向上的电平差。

公开(公告)号：US20090122994A1

公开(公告)日：2009-05-14

申请号：US12090600

申请日：2006-10-11

申请人： Yoshiki Ohta ,  Kensaku Obata

发明人： Yoshiki Ohta ,  Kensaku Obata

IPC分类号： H04R5/00

CPC分类号： H04S1/002

摘要： A localization control apparatus outputs an input audio signal to one channel among plural channels, and based on the input audio signal, outputs a control signal for controlling an audio signal for another channel among the plural channels. In the localization control apparatus, an attenuating unit attenuates the input audio signal. A delaying unit, according to band, separates and delays the audio signal attenuated by the attenuating unit. A generating unit generates the control signal by combining each component of the audio signal separated and delayed by the delaying unit.

摘要翻译： 定位控制装置将输入音频信号输出到多个通道中的一个通道，并且基于输入的音频信号，输出用于控制多个通道中的另一个通道的音频信号的控制信号。 在定位控制装置中，衰减单元衰减输入音频信号。 根据频带的延迟单元分离并延迟由衰减单元衰减的音频信号。 生成单元通过组合由延迟单元分离和延迟的音频信号的每个分量来产生控制信号。

公开(公告)号：US20080262834A1

公开(公告)日：2008-10-23

申请号：US11884736

申请日：2006-02-09

申请人： Kensaku Obata ,  Yoshiki Ohta

发明人： Kensaku Obata ,  Yoshiki Ohta

IPC分类号： G06F15/00

CPC分类号： G10L21/028

摘要： A sound separating apparatus includes a converting unit that respectively converts signals of two channels into frequency domains by a time unit, the signals representing sounds from sound sources. The apparatus also includes a localization-information calculating unit that calculates localization information regarding the frequency domains and a cluster analyzing unit that classifies the localization information into clusters and respectively calculates central values of the clusters. Finally, the apparatus further includes a separating unit that inversely converts, into a time domain, a value that is based on the central value and the localization information, and separates a sound from a given sound source included in the sound sources.

摘要翻译： 声音分离装置包括转换单元，其通过时间单位将两个信道的信号分别转换为频域，该信号表示来自声源的声音。 该装置还包括：计算关于频域的定位信息的定位信息计算单元，以及将定位信息分类为群集并分别计算群集的中心值的群集分析单元。 最后，该装置还包括一个分离单元，它将基于中心值和定位信息的值反向转换成时域，并将声音与包括在声源中的给定声源分开。