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21. 发明申请

US20050089178A1 Signal converter, output amplifying device, audio apparatus, and transmitting and receiving system 有权
标题翻译：信号转换器，输出放大装置，音响装置以及收发系统
公开(公告)号：US20050089178A1
公开(公告)日：2005-04-28
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： H04R1/40 , H03F3/217 , H03F3/38 , H03F3/68 , H03G7/00 , H04R1/32 , H04R3/02 , H04R3/12 , H04S3/02
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。

22. 发明授权

US09236041B2 Filter circuit for noise cancellation, noise reduction signal production method and noise canceling system 有权
标题翻译：噪声消除滤波电路，降噪信号生成方法和噪声消除系统
公开(公告)号：US09236041B2
公开(公告)日：2016-01-12
申请号：US11865419
申请日：2007-10-01
申请人： Kohei Asada , Tetsunori Itabashi
发明人： Kohei Asada , Tetsunori Itabashi
IPC分类号： A61F11/06 , G10K11/16 , G10K11/178
CPC分类号： G10K11/1782 , G10K11/17855 , G10K2210/1053 , G10K2210/1081 , G10K2210/3013 , G10K2210/3028 , G10K2210/3033
摘要： There is provided a filter circuit for producing a noise reduction signal for reducing a noise signal collected by a microphone, including: a digital section including an analog/digital conversion section configured to convert the noise signal into a digital noise signal, a digital filter section configured to produce a digital noise reduction signal based on the digital noise signal, and a digital/analog conversion section configured to convert the digital noise reduction signal into an analog noise reduction signal; an analog path connected in parallel to said digital section and configured to output the noise signal as it is or after processed by an analog filter; and a synthesis section configured to synthesize the analog noise reduction signal outputted from said digital/analog conversion section of said digital section and the analog signal outputted from said analog path to produce a noise reduction signal to be used for noise reduction.
摘要翻译：提供了一种用于产生用于减少由麦克风收集的噪声信号的降噪信号的滤波器电路，包括：数字部分，包括被配置为将噪声信号转换为数字噪声信号的模拟/数字转换部分，数字滤波器部分被配置为基于所述数字噪声信号产生数字降噪信号，以及数字/模拟转换部，被配置为将所述数字降噪信号转换为模拟噪声降低信号; 模拟通路并联连接到所述数字部分，并被配置为原样输出噪声信号，或者由模拟滤波器处理之后; 以及合成部，其被配置为合成从所述数字部分的所述数/模转换部分输出的模拟噪声降低信号和从所述模拟路径输出的模拟信号，以产生要用于降噪的噪声降低信号。

23. 发明授权

US09148104B2 Reproduction apparatus, reproduction method, provision apparatus, and reproduction system 有权
标题翻译：再现装置，再现方法，提供装置和再现系统
公开(公告)号：US09148104B2
公开(公告)日：2015-09-29
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： H03G3/00 , H03G7/00 , H04R29/00 , G06F17/00 , H03G3/30
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。

24. 发明授权

US09031250B2 Signal processing device and signal processing method 有权
标题翻译：信号处理装置及信号处理方法
公开(公告)号：US09031250B2
公开(公告)日：2015-05-12
申请号：US13462977
申请日：2012-05-03
申请人： Kazunobu Ookuri , Kohei Asada , Tetsunori Itabashi
发明人： Kazunobu Ookuri , Kohei Asada , Tetsunori Itabashi
IPC分类号： G10K11/16 , G10K11/178
CPC分类号： H04R3/002 , G10K11/178 , G10K2210/1053 , G10K2210/1081 , G10K2210/3051
摘要： There is provided a signal processing device s including a noise cancellation process clock generation unit configured to generate a noise cancellation process clock having a predetermined fixed frequency, a noise canceling unit configured to include a noise canceling filter operating based on the noise cancellation process clock and generating a noise canceling signal having a signal property of canceling an external noise component based on an input audio signal including the external noise component picked up by a microphone, and an addition unit superimposing the noise canceling signal generated by the filter on a digital audio signal, and a sampling rate conversion unit configured to rate-convert the input digital audio signal sampled at a clock in asynchrony with the noise cancellation process clock to a signal at a sampling frequency in synchrony with the noise cancellation process clock and to supply the rate-converted signal to the addition unit.
摘要翻译：提供了一种信号处理装置，包括：噪声消除处理时钟生成单元，被配置为生成具有预定的固定频率的噪声消除处理时钟;噪声消除单元，被配置为包括基于噪声消除处理时钟操作的噪声消除滤波器;以及基于包括由麦克风拾取的外部噪声分量的输入音频信号产生具有消除外部噪声分量的信号特性的噪声消除信号，以及将由滤波器产生的噪声消除信号叠加在数字音频信号上的相加单元以及采样率转换单元，被配置为将与噪声消除处理时钟异步的时钟处的采样的输入数字音频信号以与噪声消除处理时钟同步的采样频率的信号进行速率转换，转换信号到加法单元。

25. 发明授权

US08976978B2 Sound signal processing apparatus and sound signal processing method 有权
标题翻译：声音信号处理装置和声音信号处理方法
公开(公告)号：US08976978B2
公开(公告)日：2015-03-10
申请号：US13115233
申请日：2011-05-25
申请人： Yuji Kitazawa , Kohei Asada , Yasunobu Murata , Tetsunori Itabashi
发明人： Yuji Kitazawa , Kohei Asada , Yasunobu Murata , Tetsunori Itabashi
IPC分类号： H04R3/00 , G01S3/808 , G01S3/86 , H04R1/10 , H04R5/033
CPC分类号： G01S3/8083 , G01S3/86 , H04R1/1083 , H04R5/033 , H04R2430/03
摘要： A sound signal processing apparatus includes a sound source direction determination unit and a filter processing unit. The sound source direction determination unit determines sound source directions with respect to sound signals of a plurality of channels for respective first to n-th bands. The filter processing unit includes first to n-th filters which are connected in series and configured to boost or attenuate the sound signals with respect to the first to n-th bands. The respective first to n-th filters perform boosting or attenuation based on the sound source directions of the first to n-th bands which are determined by the sound source direction determination unit.
摘要翻译：声音信号处理装置包括声源方向确定单元和滤波器处理单元。音源方向确定单元确定相对于第一至第n个频带的多个声道的声音信号的声源方向。滤波处理单元包括串联连接并被配置为相对于第一至第n波段增强或衰减声音信号的第一至第N滤波器。相应的第一至第n滤波器基于由声源方向确定单元确定的第一至第n波段的声源方向，执行增强或衰减。

26. 发明授权

US08401205B2 Noise canceling system and noise canceling method 有权
标题翻译：降噪系统和噪声消除方法
公开(公告)号：US08401205B2
公开(公告)日：2013-03-19
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： H03B29/00 , H04R1/10
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。

27. 发明申请

US20120308022A1 SIGNAL PROCESSING DEVICE AND SIGNAL PROCESSING METHOD 有权
标题翻译：信号处理装置和信号处理方法
公开(公告)号：US20120308022A1
公开(公告)日：2012-12-06
申请号：US13462977
申请日：2012-05-03
申请人： Kazunobu Ookuri , Kohei Asada , Tetsunori Itabashi
发明人： Kazunobu Ookuri , Kohei Asada , Tetsunori Itabashi
IPC分类号： G10K11/16
CPC分类号： H04R3/002 , G10K11/178 , G10K2210/1053 , G10K2210/1081 , G10K2210/3051
摘要： There is provided a signal processing device s including a noise cancellation process clock generation unit configured to generate a noise cancellation process clock having a predetermined fixed frequency, a noise canceling unit configured to include a noise canceling filter operating based on the noise cancellation process clock and generating a noise canceling signal having a signal property of canceling an external noise component based on an input audio signal including the external noise component picked up by a microphone, and an addition unit superimposing the noise canceling signal generated by the filter on a digital audio signal, and a sampling rate conversion unit configured to rate-convert the input digital audio signal sampled at a clock in asynchrony with the noise cancellation process clock to a signal at a sampling frequency in synchrony with the noise cancellation process clock and to supply the rate-converted signal to the addition unit.
摘要翻译：提供了一种信号处理装置，包括：噪声消除处理时钟生成单元，被配置为生成具有预定的固定频率的噪声消除处理时钟;噪声消除单元，被配置为包括基于噪声消除处理时钟操作的噪声消除滤波器;以及基于包括由麦克风拾取的外部噪声分量的输入音频信号产生具有消除外部噪声分量的信号特性的噪声消除信号，以及将由滤波器产生的噪声消除信号叠加在数字音频信号上的相加单元以及采样率转换单元，被配置为将与噪声消除处理时钟异步的时钟处的采样的输入数字音频信号以与噪声消除处理时钟同步的采样频率的信号进行速率转换，转换信号到加法单元。

28. 发明授权

US08094046B2 Signal processing apparatus and signal processing method 有权
标题翻译：信号处理装置及信号处理方法
公开(公告)号：US08094046B2
公开(公告)日：2012-01-10
申请号：US12015824
申请日：2008-01-17
申请人： Kohei Asada , Tetsunori Itabashi , Kazunobu Ohkuri
发明人： Kohei Asada , Tetsunori Itabashi , Kazunobu Ohkuri
IPC分类号： H03M7/00
CPC分类号： G10L21/0208 , G10K11/178 , G10K2210/1081 , G10K2210/3051 , G10L19/0204 , H04R1/1083 , H04R3/04 , H04R5/033
摘要： Disclosed herein is a signal processing apparatus including: a first decimation processing section for generating, based on a digital signal in a first form, a digital signal in a second form; a second decimation processing section for generating, based on the digital signal in the second form, a digital signal in a third form; a first signal processing section for processing the digital signal in the third form; an interpolation processing section for converting a digital signal in the third form outputted from the first signal processing section into a digital signal in the second form; a second signal processing section for processing the digital signal in the second form outputted from the first decimation processing section; and a combining section for combining the digital signals in the second form outputted from the interpolation processing section and the second signal processing section.
摘要翻译：本文公开了一种信号处理装置，包括：第一抽取处理部分，用于基于第一形式的数字信号产生第二形式的数字信号; 第二抽取处理部分，用于基于第二形式的数字信号产生第三形式的数字信号; 用于处理第三形式的数字信号的第一信号处理部分; 内插处理部分，用于将从第一信号处理部分输出的第三形式的数字信号转换为第二形式的数字信号; 第二信号处理部分，用于处理从第一抽取处理部分输出的第二形式的数字信号; 以及组合部分，用于将从内插处理部分输出的第二形式的数字信号与第二信号处理部分组合。

29. 发明申请

US20110305349A1 REPRODUCTION DEVICE AND REPRODUCTION METHOD 有权
标题翻译：复制设备和复制方法
公开(公告)号：US20110305349A1
公开(公告)日：2011-12-15
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： 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。

30. 发明授权

US07822496B2 Audio signal processing method and apparatus 有权
标题翻译：音频信号处理方法和装置
公开(公告)号：US07822496B2
公开(公告)日：2010-10-26
申请号：US10533612
申请日：2003-10-10
申请人： Kohei Asada , Tetsunori Itabashi
发明人： Kohei Asada , Tetsunori Itabashi
IPC分类号： G06F17/00
CPC分类号： H04S3/008 , H04R3/12 , H04R2430/20
摘要： An audio signal processing method and apparatus in which the apparatus includes a plurality of digital filters, each supplied with an audio signal, and a speaker array. Outputs from the digital filters are supplied to speakers included in the speaker array to form a sound field. A predetermined delay time is set in each of the digital filters, to thereby form, in the sound field, a point where the sound pressure is higher than in the surrounding and a point where the sound pressure is lower than in the surrounding. A low-pass filter characteristic is given to the frequency response of the digital filters and a pseudo pulse train is used to enhance the setting resolution of the delay time.
摘要翻译：一种音频信号处理方法和装置，其中所述装置包括多个数字滤波器，每个被提供有音频信号，和扬声器阵列。来自数字滤波器的输出被提供给扬声器阵列中包括的扬声器以形成声场。在每个数字滤波器中设置预定的延迟时间，从而在声场中形成声压高于周围的点和声压低于周围的点。给出了数字滤波器的频率响应的低通滤波器特性，并且使用伪脉冲串来提高延迟时间的设置分辨率。

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