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。

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：US09503817B2

公开(公告)日：2016-11-22

申请号：US14387927

申请日：2012-03-27

申请人： Akihiro Iseki ,  Yoshiki Ohta

发明人： Akihiro Iseki ,  Yoshiki Ohta

IPC分类号： H04R1/20 ,  H04R3/12 ,  H04S7/00 ,  G06F3/16 ,  H04R1/00 ,  H04S1/00

CPC分类号： H04R3/12 ,  G06F3/16 ,  H04R2430/03 ,  H04R2499/13 ,  H04S1/00 ,  H04S7/302

摘要： The sound reproduction device is applied to an acoustic space such as a passenger compartment, and controls the levels of the reproduced sounds at two evaluation points set at the seats in the passenger compartment, for example. Specifically, the sound reproduction device controls the phase of the one channel sound signal inputted from external and supplies it to the pair of speakers. The phase control is performed such that the sum of reproduced sound levels at the two evaluation points becomes larger than the sum of the reproduced sound levels at the two evaluation points in a case where the sound signal is reproduced by only one of the pair of speakers, in an entire audible band.

摘要翻译： 声音再现装置被应用于诸如乘客室的声学空间，并且例如在设置在乘客室中的座位处的两个评估点处控制再现声音的水平。 具体地，声音再现装置控制从外部输入的单声道声音信号的相位并将其提供给一对扬声器。 执行相位控制，使得在两个评估点处的再现声级的和变得比只有一对扬声器中的一个扬声器再现声音信号的情况下两个评估点处的再现声级的总和 ，在整个可听频带。

公开(公告)号：US08094827B2

公开(公告)日：2012-01-10

申请号：US11632963

申请日：2005-07-13

申请人： Teruo Baba ,  Yoshiki Ohta ,  Takashi Mitsuhashi

发明人： Teruo Baba ,  Yoshiki Ohta ,  Takashi Mitsuhashi

IPC分类号： H03G3/00 ,  H04R29/00 ,  H04B1/00

CPC分类号： H04S7/305 ,  H04R2203/12 ,  H04S3/02 ,  H04S7/301

摘要： The present invention provides a sound reproducing system and a sound reproducing apparatus that can provide a high realistic sensation to a user, without having to do a troublesome task on the user's side.A surround-sound system (100) includes: an array speaker system (20) that is formed with speaker units SPU having the same characteristics; and a signal processing apparatus (120) that drives the speaker units SPU independently of one another and amplifies an audio signal. The signal processing apparatus (120) includes: a signal processing control unit (260) that calculates each filter coefficient for each of the speaker units so as to generate reverberant components to be reflected by a wall surface of a listening room (10) when the audio signal or test signal is amplified through the array speaker system (20) based on preset reverberant characteristics; and a filtering unit (250) that divides the audio signal or test signal by the same number as the number of speaker units so as to obtain unit signals, and then performs signal processing on each of the unit signals divided based on each of the filter coefficients.

摘要翻译： 本发明提供了一种可以向用户提供高逼真感的声音再现系统和声音再现装置，而无需在用户方面进行麻烦的任务。 环绕声系统（100）包括：阵列扬声器系统（20），其形成有具有相同特征的扬声器单元SPU; 以及独立地驱动扬声器单元SPU并放大音频信号的信号处理装置（120）。 信号处理装置（120）包括：信号处理控制单元（260），其计算每个扬声器单元的每个滤波器系数，以便产生混响分量，以便当听音室（10）的壁面反射时， 音频信号或测试信号通过阵列扬声器系统（20）基于预设的混响特性被放大; 以及滤波单元（250），其将音频信号或测试信号除以与扬声器单元数相同的数量，以获得单位信号，然后基于每个滤波器分割的每个单位信号执行信号处理 系数。

公开(公告)号：US20090232318A1

公开(公告)日：2009-09-17

申请号：US12306542

申请日：2007-06-03

申请人： Yoshiki Ohta

发明人： Yoshiki Ohta

IPC分类号： H04B15/00 ,  H04R29/00

CPC分类号： H04R29/001 ,  H04R2430/03

摘要： A loudspeaker output correcting device operable under control of a control element, and comprising a first loudspeaker for outputting a first test signal, a second loudspeaker for outputting a second sound signal including a second test signal such that the phase of the second test signal is almost the same as that of the first one and when the second test signal is combined with the first one, the power characteristic is a constant value, sound collecting element for collecting the outputted first and second test signals, computing element for computing the difference between the first distance between the first loudspeaker and the sound collecting element and the second distance; between the second loudspeaker and the sound collecting element from the spectrum of the combined signal produced by combining the collected first and second signals, and correcting element for correcting the output relative characteristics of the first and second loudspeakers.

摘要翻译： 一种扬声器输出校正装置，其在控制元件的控制下可操作，并且包括用于输出第一测试信号的第一扬声器，用于输出包括第二测试信号的第二声音信号的第二扬声器，使得第二测试信号的相位几乎 与第一测试信号相同，当第二测试信号与第一测试信号组合时，功率特性是恒定值，用于收集输出的第一和第二测试信号的声音采集元件，用于计算第一和第二测试信号之间的差的计算元件 第一扬声器与收音元件之间的第一距离和第二距离; 从通过组合所收集的第一和第二信号产生的组合信号的频谱和第二和第二扬声器的输出相对特性的校正元件之间的第二扬声器和声音采集元件之间。

公开(公告)号：US20080019535A1

公开(公告)日：2008-01-24

申请号：US11631493

申请日：2005-07-05

申请人： Takashi Mitsuhashi ,  Yoshiki Ohta ,  Teruo Baba

发明人： Takashi Mitsuhashi ,  Yoshiki Ohta ,  Teruo Baba

IPC分类号： H04B3/20

CPC分类号： H04S7/305 ,  H04R5/027 ,  H04S7/301 ,  H04S7/302

摘要： The present invention provides a sound reproducing system capable of accurately analyzing a reverberation characteristic of amplified sound including an arrival direction of a reverberation component, which is more natural, and has higher realistic sensation. A surround system 100 has a speaker system 130, a signal processing apparatus 120 for recognizing a reverberation characteristic of a listening room 10 and adjusting a reverberation component of sound source to be amplified on the basis of the recognized reverberation characteristic, and a microphone array 140 constructed by a plurality of microphones M disposed in the listening room 10 and having the same characteristics, and in which distances among the microphones M are determined in advance. In the case where sound source is amplified and output from the speaker system 130 to the listening room 10, the microphone array 140 collects amplified sound in a specific listening position in the listening room 10.

摘要翻译： 本发明提供一种声音再现系统，其能够精确地分析放大声音的混响特性，包括更自然的混响成分的到来方向，并具有更高的逼真感。 环绕系统100具有扬声器系统130，用于识别听音室10的混响特性的信号处理装置120，并且基于所识别的混响特性调整要放大的声源的混响分量，以及麦克风阵列140 由设置在听音室10中并具有相同特性的多个麦克风M构成，并且预先确定麦克风M之间的距离。 在声源被放大并从扬声器系统130输出到聆听室10的情况下，麦克风阵列140在收听室10中收集特定聆听位置中的放大声音。

公开(公告)号：US07171009B2

公开(公告)日：2007-01-30

申请号：US09781274

申请日：2001-02-13

申请人： Yoshiki Ohta

发明人： Yoshiki Ohta

IPC分类号： H03G5/00

CPC分类号： H04S7/307 ,  H04S3/00 ,  H04S7/302

摘要： In correcting the sound field, the loudspeakers 6FL to 6WF are sounded by the noise. The attenuation factors of the inter-band attenuators ATF11 to ATFki for adjusting gains of the band-pass filters BPF11 to BPFki to the frequency in respective channels are corrected based on detection results of the reproduced sounds of the loudspeakers 6FL to 6WF. Then, the attenuation factors of the channel-to-channel attenuators ATG1 to ATG5 are corrected based on the detection results of the reproduced sounds of the loudspeakers 6FL to 6WF. Then, the delay times of the delay circuits DLY1 to DLY5 are corrected based on the detection results of the reproduced sounds of the loudspeakers 6FL to 6WF. Then, the attenuation factor of the channel-to-channel attenuator ATGk is corrected based on the detection result of the reproduced sound of the loudspeaker 6WF as the subwoofer, whereby the levels of the reproduced sounds reproduced by the loudspeakers 6FL to 6WF are adjusted to be made flat over the audio frequency band.

摘要翻译： 在校正声场时，扬声器6＆lt; 6＆gt;至6＆lt; WF＆lt; / S＆gt;被噪声所响。 用于将带通滤波器BPF 11的增益调整为BPF _{的带宽衰减器ATF 11到ATF K1i的衰减因子 基于扬声器6的再现声音到6WF的检测结果来校正各个声道中的频率的ki 。 然后，基于扬声器6的再现声音的检测结果来校正通道到通道衰减器ATG 1到ATG 5的衰减因子。 FL 至6WF 。 然后，基于扬声器6的再现声音的检测结果来校正延迟电路DLY 1到DLY 5的延迟时间 > 6WF 。 然后，基于作为重低音扬声器的重放声音的检测结果来校正信道到信道衰减器ATG 的衰减因子，由此 由扬声器6＆gt;至6＆lt; WF＆lt;＆lt; /＆gt;再现的再现声音的电平被调整为在音频频带上变得平坦。}

公开(公告)号：US06909041B2

公开(公告)日：2005-06-21

申请号：US10322662

申请日：2002-12-19

申请人： Yoshiki Ohta

发明人： Yoshiki Ohta

IPC分类号： G10K15/00 ,  G10K15/12 ,  H04M9/08 ,  H04S7/00 ,  G10H1/02 ,  G10H7/00

CPC分类号： H04M9/082 ,  H04S7/305

摘要： Reverberation characteristics of an original sound field and a reproduction sound field are measured and a difference between the reverberation characteristics is obtained. A reflected sound pattern added to reproduction sound is calculated so that the reverberation characteristics of the reproduction sound field approximate to the reverberation characteristics of the original sound field from the difference between the reverberation characteristics and is added and reproduced in the reproduction sound field. A frequency is divided into predetermined bands and a reflected sound pattern to be added is obtained similarly in the respective bands and is added to the corresponding frequency band of the reproduction sound and reproduced. Measurement of the reverberation characteristics is obtained by inputting an impulse signal to a speaker and collecting a generated sound wave by a microphone provided in a position corresponding to the head of a listener and analyzing the sound wave by an analyzer.

摘要翻译： 测量原始声场和再现声场的混响特性，并获得混响特性之间的差异。 计算添加到再现声音的反射声音模式，使得再现声场的混响特性从混响特性之间的差接近于原始声场的混响特性，并在再现声场中相加和再现。 将频率划分为预定频带，并且在各个频带中类似地获得要添加的反射声音模式，并将其添加到再现声音的相应频带并再现。 通过向扬声器输入脉冲信号并通过设置在与收听者的头部相对应的位置的麦克风收集生成的声波并通过分析器分析声波来获得混响特性的测量。

公开(公告)号：US06477255B1

公开(公告)日：2002-11-05

申请号：US09368348

申请日：1999-08-05

申请人： Minoru Yoshida ,  Fumio Matsushita ,  Satoshi Kumada ,  Yoshiki Ohta

发明人： Minoru Yoshida ,  Fumio Matsushita ,  Satoshi Kumada ,  Yoshiki Ohta

IPC分类号： H04B100

CPC分类号： H04R5/02 ,  H04R2499/13 ,  H04S1/002

摘要： A rear speaker and a front speaker are provided in a room. A microphone is disposed at a listening position between the front and rear speakers for picking up a first sound from the front speakers and a second sound from the rear speaker. Time lags of the first sound and the second sound is obtained from the outputs of the microphone, and the time difference between the time lags is obtained. An antiphase audio signal opposite to a reflected composite signal included in the first sound picked up by the microphone is provided by the sound field correcting circuit. The antiphase audio signal with the same amplitude is delayed based on the time difference and emitted from the rear speaker so as to cancel the reflected composite signal.

摘要翻译： 房间内设有后置扬声器和前置扬声器。 麦克风设置在前扬声器和后扬声器之间的收听位置，用于拾取来自前置扬声器的第一声音和来自后置扬声器的第二声音。 从麦克风的输出获得第一声音的时间滞后，并且获得第二声音，并且获得时间滞后之间的时间差。 由声场校正电路提供与由麦克风拾取的第一声音中包括的反射复合信号相反的反相音频信号。 具有相同幅度的反相音频信号基于时间差被延迟并从后置扬声器发射，以便消除反射的复合信号。

公开(公告)号：US09226066B2

公开(公告)日：2015-12-29

申请号：US13640244

申请日：2010-04-09

申请人： Yoshiki Ohta ,  Manabu Nohara ,  Yusuke Soga ,  Shin Hasegawa ,  Hisashi Kihara

发明人： Yoshiki Ohta ,  Manabu Nohara ,  Yusuke Soga ,  Shin Hasegawa ,  Hisashi Kihara

IPC分类号： G10K11/16 ,  H04R3/00 ,  G10K11/178

CPC分类号： H04R3/002 ,  G10K11/178 ,  G10K2210/3016 ,  G10K2210/3022 ,  G10K2210/3057

摘要： An active vibration noise control device is preferably used for canceling a vibration noise by making a speaker generate a control sound. Concretely, the active vibration noise control device includes an attenuating unit which attenuates a control signal generated by an adaptive notch filter, and provides the attenuated control signal to the speaker, when amplitude of a filter coefficient is larger than a threshold. Therefore, it is possible to suppress continuous ups and downs of the filter coefficient during an occurrence of an abnormality. Hence, it becomes possible to appropriately suppress an occurrence of a cyclic abnormal sound and an increase in the vibration noise during the occurrence of the abnormality.

摘要翻译： 主动振动噪声控制装置优选地通过使扬声器产生控制声音来消除振动噪声。 具体地，主动振动噪声控制装置包括：衰减单元，衰减由自适应陷波滤波器产生的控制信号，并且当滤波器系数的幅度大于阈值时，将衰减的控制信号提供给扬声器。 因此，可以在发生异常时抑制滤波器系数的连续上升和下降。 因此，可以适当地抑制异常发生期间的循环异常声音的发生和振动噪声的增加。