公开(公告)号：US08761406B2

公开(公告)日：2014-06-24

申请号：US12485191

申请日：2009-06-16

申请人： Kazunobu Ohkuri ,  Kohei Asada ,  Shiro Suzuki ,  Tetsunori Itabashi ,  Hiroki Kawanishi

发明人： Kazunobu Ohkuri ,  Kohei Asada ,  Shiro Suzuki ,  Tetsunori Itabashi ,  Hiroki Kawanishi

IPC分类号： H03G3/20 ,  H03G5/00 ,  H03G9/00 ,  H03G7/00 ,  H03B29/00 ,  G10K11/16

CPC分类号： G10L21/0208 ,  H03G3/32 ,  H03G9/005 ,  H03G9/10

摘要： An audio signal processing device includes: a microphone configured to collect noise; an analyzing unit configured to analyze an audio signal collected by the microphone to detect the level and frequency property of the collected audio signal; and a signal processing unit configured to subject an audio signal to be reproduced to signal processing based on the analysis results of the analyzing unit.

摘要翻译： 音频信号处理装置包括：被配置为收集噪声的麦克风; 分析单元，被配置为分析由麦克风收集的音频信号，以检测所收集的音频信号的电平和频率属性; 以及信号处理单元，被配置为基于分析单元的分析结果对要再现的音频信号进行信号处理。

公开(公告)号：US08199936B2

公开(公告)日：2012-06-12

申请号：US10967529

申请日：2004-10-18

申请人： Kohei Asada ,  Tetsunori Itabashi

发明人： Kohei Asada ,  Tetsunori Itabashi

IPC分类号： H04R3/00

CPC分类号： H03F3/217 ,  H03F3/68 ,  H03F2200/331 ,  H04R3/02

摘要： Four speakers are matrix-connected to each other and a conversion circuit for converting audio signals of four channels into pulse width modulation signals of four channels that are time-divided so as to be complementary to matrix connection are provided. Four class-D output amplifiers receive the corresponding pulse width modulation signals output from the conversion circuit and outputs from the output amplifiers are supplied to the speakers.

摘要翻译： 提供四个扬声器彼此矩阵连接，并且提供用于将四个通道的音频信号转换成四个通道的脉冲宽度调制信号的转换电路，该四个通道被时分以便与矩阵连接互补。 四个D类输出放大器接收从转换电路输出的对应的脉冲宽度调制信号，输出放大器的输出被提供给扬声器。

公开(公告)号：US08111831B2

公开(公告)日：2012-02-07

申请号：US11410881

申请日：2006-04-25

申请人： Kohei Asada ,  Tetsunori Itabashi

发明人： Kohei Asada ,  Tetsunori Itabashi

IPC分类号： H04R29/00 ,  H04R5/02

CPC分类号： H04S7/301

摘要： An acoustic apparatus includes a positive value conversion section configured to convert, into a positive value, a response signal obtained by collecting a test signal emitted from a speaker using a microphone; a detection section configured to detect a first transient response part that becomes a first mountain portion of the converted response signal; an estimation section configured to estimate a rise point of the converted response signal from at least N points that contain a peak position of the first transient response part or the vicinity thereof; and a computation section configured to compute a time delay of audio collected by the microphone based on the estimated rise point and on a timing at which the test signal is generated.

摘要翻译： 声学装置包括：正值转换部分，被配置为将使用麦克风收集从扬声器发出的测试信号获得的响应信号转换成正值; 检测部，被配置为检测变换为响应信号的第一山部的第一瞬态响应部; 估计部分，被配置为从包含第一瞬态响应部分或其附近的峰值位置的至少N个点估计转换的响应信号的上升点; 以及计算部分，被配置为基于所估计的上升点和产生测试信号的定时来计算麦克风收集的音频的时间延迟。

公开(公告)号：US08107637B2

公开(公告)日：2012-01-31

申请号：US12431996

申请日：2009-04-29

申请人： Kohei Asada ,  Tetsunori Itabashi ,  Noriyuki Ozawa

发明人： Kohei Asada ,  Tetsunori Itabashi ,  Noriyuki Ozawa

IPC分类号： G10K11/16

CPC分类号： G10K11/178 ,  G10K2210/1081 ,  G10K2210/3028

摘要： A signal processing device includes: a filter processing unit configured to execute noise reduction operations by subjecting sound-collected signals from a sound-collecting unit to filtering processing based on preset filter properties and providing with signal properties for noise reduction; a noise-unreduced signal obtaining unit configured to obtain noise-unreduced signals obtained in a state where noise reduction operations by the filter processing unit are stopped; and a filter property selecting unit configured to obtain a difference between the noise-unreduced signals and noise-reduced signals obtained at the time of executing noise reduction operations with preset filter properties set to the filter processing unit as a candidate filter property, thereby obtaining a noise reduction effect indicator regarding the candidate filter property, and selecting filter properties to be set to the filter processing unit based on the noise reduction effect indicator.

摘要翻译： 信号处理装置包括：滤波处理单元，被配置为通过使来自声音采集单元的声音采集信号基于预设滤波器特性进行滤波处理并提供用于降噪的信号特性来执行降噪操作; 噪声消除信号获取单元，被配置为获得在由所述滤波处理单元进行的噪声降低操作停止的状态下获得的噪声消除信号; 以及滤波器特性选择单元，其被配置为获得噪声消除信号和在执行降噪操作时获得的噪声降低信号之间的差值，其中设置为过滤处理单元的预设滤波器特性作为候选滤波器特性，从而获得 关于候选滤波器特性的降噪效果指示器，以及基于降噪效果指示器选择要设置到滤波处理单元的滤波器特性。

公开(公告)号：US06501843B2

公开(公告)日：2002-12-31

申请号：US09950722

申请日：2001-09-12

申请人： Junichi Usui ,  Tetsunori Itabashi

发明人： Junichi Usui ,  Tetsunori Itabashi

IPC分类号： H04R502

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

摘要： An automotive audio reproducing apparatus according to the present invention comprises: a sound image position correction circuit 52 for converting a left-channel input digital audio signal XL(Z) and a right-channel input digital audio signal XR(Z) into a digital audio signal YL(Z) and a digital audio signal YR(Z), respectively, for output expressed by: YL(Z)·GLL(Z)+YR(Z)·GLR(Z)=XL(Z)·FLL(Z)+XR(Z)·FLR(Z) YR(Z)·GLL(Z)+YL(Z)·GLR(Z)=XR(Z)·FLL(Z)+XL(Z)·FLR(Z) where FLL(Z) to GLR(Z) are given head related transfer functions; a depth correction circuit 53 for adding reflected sound signals to the signals YL(Z) and YR(Z), respectively; a D/A converter circuit 6 for subjecting output signals of the correction circuit 53 to D/A conversion; and a level control circuit 522 for controlling level of a difference signal in the sound image position correction circuit 52; whereby analog audio signals outputted from the D/A converter circuit 6 are supplied to a left-channel speaker and a right-channel speaker, respectively.

摘要翻译： 根据本发明的汽车音响再现装置包括：用于将左声道输入数字音频信号XL（Z）和右声道输入数字音频信号XR（Z）转换为数字音频的声像位置校正电路52 信号YL（Z）和数字音频信号YR（Z）分别表示为：其中FLL（Z）至GLR（Z）被赋予与头相关的传递函数; 用于将反射的声音信号分别加到信号YL（Z）和YR（Z）上的深度校正电路53; D / A转换器电路6，用于对校正电路53的输出信号进行D / A转换; 以及用于控制声像位置校正电路52中的差分信号电平的电平控制电路522; 其中从D / A转换器电路6输出的模拟音频信号分别提供给左声道扬声器和右声道扬声器。

公开(公告)号：US08761414B2

公开(公告)日：2014-06-24

申请号：US13155599

申请日：2011-06-08

申请人： Kohei Asada ,  Tetsunori Itabashi ,  Yoshio Ohashi

发明人： Kohei Asada ,  Tetsunori Itabashi ,  Yoshio Ohashi

IPC分类号： H03G3/00 ,  H04R1/10

CPC分类号： H04R3/007 ,  H04R1/1041 ,  H04R29/001

摘要： A reproduction device includes an information reading unit that reads sensitivity information from a storage unit of a headphone device which has a speaker reproducing an electric signal of an audible signal as a sound and the storage unit storing the sensitivity information for the speaker, an adjustment unit that adjusts an output level of the electric signal supplied to the headphone device, and a control unit that reads the sensitivity information from the storage unit via the information reading unit, and controls the adjustment unit such that the electric signal lies in an allowable maximal output level based on the sensitivity information.

摘要翻译： 一种再现装置，包括：信息读取单元，其从具有扬声器再现声音信号的扬声器的耳机装置的存储单元读取灵敏度信息，并且存储单元存储扬声器的灵敏度信息;调节单元 调整提供给耳机装置的电信号的输出电平;以及控制部，其经由信息读取部从存储部读取灵敏度信息，并且控制调节部，使得电信号处于允许的最大输出 基于灵敏度信息。

公开(公告)号：US20120114127A1

公开(公告)日：2012-05-10

申请号：US13287000

申请日：2011-11-01

申请人： Kosei Yamashita ,  Tetsunori Itabashi

发明人： Kosei Yamashita ,  Tetsunori Itabashi

IPC分类号： H04R29/00 ,  H03G3/00

CPC分类号： H03G3/3089 ,  H03G3/3005 ,  H03G7/002 ,  H03G7/007

摘要： A reproduction apparatus includes: a reproduction unit which reproduces sound data; and a volume correction unit which correct a volume of the sound data reproduced by the reproduction unit on the basis of a relationship between a volume characteristic value of each of a plurality of pieces of sound data and a volume characteristic value of the sound data.

摘要翻译： 再现装置包括：再现单元，再现声音数据; 以及音量校正单元，其基于多个声音数据中的每一个的音量特性值与声音数据的音量特性值之间的关系来校正由再现单元再现的声音数据的音量。

公开(公告)号：US20100318205A1

公开(公告)日：2010-12-16

申请号：US12795117

申请日：2010-06-07

申请人： Kazunobu Ohkuri ,  Kohei Asada ,  Michiaki Yoneda ,  Tetsunori Itabashi

发明人： Kazunobu Ohkuri ,  Kohei Asada ,  Michiaki Yoneda ,  Tetsunori Itabashi

IPC分类号： G06F17/00

CPC分类号： H04R3/002 ,  H04R3/04

摘要： A signal processing apparatus includes: analog-to-digital conversion means that receives an analog detection signal acquired by detecting a movement of a diaphragm of a speaker, converts it into a digital signal by performing a first delta sigma modulation process, and outputs the digital signal; signal processing means that receives the digital detection signal output, generates a digital feedback signal, and outputs the digital feedback signal; synthesis means that converts an input digital audio signal to have a same sampling frequency as the feedback signal and then combines the input digital audio signal with the feedback signal as negative feedback; and digital-to-analog conversion means having a portion for a second delta sigma modulation process in which the digital audio signal after combination with the feedback signal is input, and the digital audio signal is converted into a digital signal and performing conversion of the digital audio signal into an analog signal.

摘要翻译： 信号处理装置包括：模数转换装置，其接收通过检测扬声器的振动膜的移动而获取的模拟检测信号，通过执行第一Δ-Σ调制处理将其转换为数字信号，并输出数字 信号; 信号处理装置，其接收数字检测信号输出，产生数字反馈信号，并输出数字反馈信号; 合成装置将输入数字音频信号转换为具有与反馈信号相同的采样频率，然后将输入数字音频信号与反馈信号组合为负反馈; 以及数模转换装置，其具有用于第二Δ-Σ调制处理的部分，其中与反馈信号组合之后的数字音频信号被输入，并且数字音频信号被转换成数字信号并执行数字信号的转换 音频信号转换为模拟信号。

公开(公告)号：US20080310645A1

公开(公告)日：2008-12-18

申请号：US11868815

申请日：2007-10-08

申请人： Tetsunori Itabashi ,  Kohei Asada

发明人： Tetsunori Itabashi ,  Kohei Asada

IPC分类号： A61F11/06 ,  G10K11/16

CPC分类号： H04R1/1083 ,  G10K11/17855 ,  G10K11/17881 ,  G10K2210/1053 ,  G10K2210/1081 ,  H04R1/1008 ,  H04R2410/05

摘要： Disclosed herein is a noise canceling system, including: a first sound collection section configured to collect noise and output a first noise signal; a first signal processing section configured to produce a first noise reduction signal for reducing the noise at a predetermined cancel point; a sound emission section configured to emit noise reduction sound based on the first noise reduction signal; a second sound collection section configured to collect noise and output a second noise signal; and a second signal processing section configured to produce a second noise reduction signal for reducing noise at the cancel point. In the noise canceling system, the sound emission section emitting the noise reduction sound based on the first and second noise reduction signals

摘要翻译： 本文公开了一种噪声消除系统，包括：第一声音收集部分，被配置为收集噪声并输出第一噪声信号; 第一信号处理部，被配置为产生用于减小预定消除点处的噪声的第一降噪信号; 声音发射部分，被配置为基于所述第一噪声降低信号发射降噪声音; 第二声音收集部，被配置为收集噪声并输出第二噪声信号; 以及第二信号处理部，被配置为产生用于降低取消点处的噪声的第二降噪信号。 在噪声消除系统中，声音发射部分基于第一和第二降噪信号发射降噪声音

公开(公告)号：US20080189065A1

公开(公告)日：2008-08-07

申请号：US12012534

申请日：2008-02-04

申请人： Kohei Asada ,  Tetsunori Itabashi ,  Kenji Nakano

发明人： Kohei Asada ,  Tetsunori Itabashi ,  Kenji Nakano

IPC分类号： G01R23/16

CPC分类号： H04S7/307 ,  H04S7/301 ,  H04S7/302

摘要： A signal processing apparatus includes a signal output unit for outputting a measurement signal, the measurement signal being produced by synthesizing a signal composed of a concatenation of 2d period signals with a sinusoidal signal, each period signal having a time-domain waveform period being 2n samples, the sinusoidal wave having a wave count within the concatenation period of 2d period signals being other than an integer multiple of 2d, and n and d being respectively natural numbers, and an analyzing unit for frequency analyzing a response signal obtained as a result of picking up the measurement signal output from the signal output unit.

摘要翻译： 一种信号处理装置，包括用于输出测量信号的信号输出单元，该测量信号是通过将由2个周期信号组合的信号与正弦信号合成而产生的，每个周期信号具有 时域波形周期为2×n个采样，在2周期信号的级联周期内具有波数的正弦波不是2 d ，n和d分别是自然数，以及分析单元，用于频率分析作为拾取从信号输出单元输出的测量信号的结果而获得的响应信号。