公开(公告)号：US20050195929A1

公开(公告)日：2005-09-08

申请号：US11100128

申请日：2005-04-06

申请人： Nobuyuki Yasuda ,  Kazunobu Ohkuri

发明人： Nobuyuki Yasuda ,  Kazunobu Ohkuri

IPC分类号： G10L19/00 ,  H03H17/00 ,  H03H17/06 ,  H04B14/02 ,  H04B14/04 ,  H04H5/00 ,  H04H20/89 ,  H04L7/02 ,  H04L25/05 ,  H04B1/38

CPC分类号： H03H17/0628 ,  H03H17/0621 ,  H04B14/026 ,  H04H20/89 ,  H04L25/05

摘要： A sampling frequency conversion apparatus which easily controls the phase difference (time difference) between the input data and the output data in converting the sampling frequency, and comprises storage means 13 for continuously writing the input data or the data obtained by over-sampling the input data and for continuously reading out the data written maintaining a predetermined address difference relative to the write address, and interpolation processing means 14 for interpolating the data read out from the storage means 13 to obtain data of which the sampling frequency is converted. In converting the sampling frequency, an address difference between a write address and a read address in the storage means 13 is optimized, the address difference being optimized without limitation for a predetermined period of time from the start of supplying the input data and, then, being optimized by imposing a predetermined limitation after the passage of the predetermined period of time.

摘要翻译： 一种采样频率转换装置，其在转换采样频率时容易地控制输入数据和输出数据之间的相位差（时间差），并且包括用于连续写入输入数据或通过对输入进行过采样而获得的数据的存储装置13 数据，并连续地读出相对于写入地址保持预定地址差的写入数据;以及内插处理装置14，用于内插从存储装置13读出的数据，以获得采样频率被转换的数据。 在转换采样频率时，优化存储装置13中的写入地址和读取地址之间的地址差异，在从提供输入数据开始的预定时间段内对地址差进行优化，而不限于此， 通过在经过预定时间段之后施加预定的限制来优化。

公开(公告)号：US06952461B2

公开(公告)日：2005-10-04

申请号：US10007837

申请日：2001-11-08

申请人： Nobuyuki Yasuda ,  Kazunobu Ohkuri

发明人： Nobuyuki Yasuda ,  Kazunobu Ohkuri

IPC分类号： G10L19/00 ,  H03H17/00 ,  H03H17/06 ,  H04B14/02 ,  H04B14/04 ,  H04H5/00 ,  H04H20/89 ,  H04L7/02 ,  H04L25/05 ,  H04L7/00

CPC分类号： H03H17/0628 ,  H03H17/0621 ,  H04B14/026 ,  H04H20/89 ,  H04L25/05

摘要： A sampling frequency conversion apparatus which easily controls the phase difference (time difference) between the input data and the output data in converting the sampling frequency, includes a storage device 13 for continuously writing the input data or the data obtained by over-sampling the input data and for continuously reading out the data written maintaining a predetermined address difference relative to the writable address, and an interpolation processing unit 14 for interpolating the data read-out from the storage device 13 to obtain data of which the sampling frequency is converted. In converting the sampling frequency, an address difference between a writable address and a readable address in the storage device 13 is optimized, the address difference being optimized without limitation for a predetermined period of time from the start of supplying the input data and, then, being optimized by imposing a predetermined limitation after the passage of the predetermined period of time.

摘要翻译： 一种在转换采样频率时容易控制输入数据和输出数据之间的相位差（时间差）的采样频率转换装置，包括用于连续写入输入数据的存储装置13或通过对采样频率进行过采样获得的数据 数据，并且用于连续地读出相对于可写地址保持预定地址差的写入数据;以及内插处理单元14，用于内插从存储装置13读出的数据，以获得采样频率被转换的数据。 在转换采样频率时，优化存储装置13中的可写入地址和可读地址之间的地址差，在从提供输入数据开始的预定时间段内优化地址差，而不限于此， 通过在经过预定时间段之后施加预定的限制来优化。

公开(公告)号：US09245517B2

公开(公告)日：2016-01-26

申请号：US12486054

申请日：2009-06-17

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

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

IPC分类号： G10K11/178 ,  G10L21/06

CPC分类号： G10K11/178 ,  G10K2210/1053 ,  G10K2210/1081 ,  G10L2021/065 ,  H04R29/004 ,  H04R2460/01

摘要： A noise reduction audio reproducing method includes the steps of: generating, from an audio signal of collected and obtained noise, an audio signal for noise cancellation to cancel the noise by synthesizing the audio signal for noise cancellation and the noise in an acoustic manner, reproducing the audio signal for noise cancellation acoustically to synthesize this with the noise in an acoustic manner; emphasizing an audio component to be listened to, of collected audio; synthesizing an audio signal with the audio component to be listened to being emphasized, and the audio signal for noise cancellation to supply the synthesized signal thereof to an electro-acoustic converting unit; and controlling so as to supply an audio signal, with the audio component to be listened to having been emphasized, to a synthesizing unit, regarding only a section based on a control signal.

摘要翻译： 降噪音频再现方法包括以下步骤：从收集和获得的噪声的音频信号中产生用于噪声消除的音频信号以通过以声学方式合成用于噪声消除的音频信号和噪声来消除噪声，再现 用于声学噪声消除的音频信号以声学方式与噪声合成; 强调要收听的音频成分; 合成音频信号与待收听的音频分量被强调，以及用于噪声消除的音频信号，以将其合成信号提供给电声转换单元; 并且控制以将要被收听的已被强调的音频分量的音频信号提供给仅基于控制信号的部分的合成单元。

公开(公告)号：US08737642B2

公开(公告)日：2014-05-27

申请号：US13311649

申请日：2011-12-06

申请人： Masaru Shimura ,  Taro Nakagami ,  Kazunobu Ohkuri

发明人： Masaru Shimura ,  Taro Nakagami ,  Kazunobu Ohkuri

IPC分类号： H03G5/00

CPC分类号： H04R3/04 ,  H03G5/165 ,  H04R2430/03

摘要： An audio signal processing apparatus and method for extracting components from an input signal, generating additional components, combining components, and level-controlling components. An audio signal processing apparatus may include a harmonic overtone adder and an equalizer. A harmonic overtone adder may include a high-pass filter, a low-pass filter, an harmonic overtone generator, and a combining unit. An equalizer may include a level detector and a gain controller.

摘要翻译： 一种用于从输入信号中提取组件，产生附加组件，组合组件和级别控制组件的音频信号处理设备和方法。 音频信号处理装置可以包括谐波泛音加法器和均衡器。 谐波泛音加法器可以包括高通滤波器，低通滤波器，谐波泛音发生器和组合单元。 均衡器可以包括电平检测器和增益控制器。

公开(公告)号：US20080103763A1

公开(公告)日：2008-05-01

申请号：US11977383

申请日：2007-10-24

申请人： Masaru Shimura ,  Kazunobu Ohkuri ,  Taro Nakagami

发明人： Masaru Shimura ,  Kazunobu Ohkuri ,  Taro Nakagami

IPC分类号： G10L19/00

CPC分类号： H04R3/04 ,  H04R2430/03

摘要： Samples of a component having a frequency less than a predetermined frequency in an input audio signal that is a digital signal having a predetermined sampling frequency are written in a memory. A harmonic-overtone signal having a frequency N times a frequency of the input audio signal is generated by repeating an operation N times, where N is an integer more than one, the operation including reading one sample and thinning out (N-1) samples for every N samples from the memory within each cycle period from a first one-direction zero-crossing point to a second one-direction zero-crossing point subsequent to the first one-direction zero-crossing point, each one-direction zero-crossing point being a point at which a level of the input audio signal changes from negative to positive or a point at which the level of the input audio signal changes from positive to negative.

摘要翻译： 在具有预定采样频率的数字信号的输入音频信号中具有小于预定频率的频率的分量的采样被写入存储器。 通过重复N次，其中N是大于1的整数，产生具有输入音频信号的频率N倍的频率的谐波泛音信号，该操作包括读取一个样本和稀疏（N-1）个样本 对于从第一单向过零点之后的第一单向过零点到第二单向零交叉点的每个周期内的每个N个采样，每个单向零交叉 点是输入音频信号的电平从负变化到正的点或输入音频信号的电平从正变为负的点。

公开(公告)号：US07132884B2

公开(公告)日：2006-11-07

申请号：US10514178

申请日：2003-05-01

申请人： Kazunobu Ohkuri ,  Toshihiko Masuda

发明人： Kazunobu Ohkuri ,  Toshihiko Masuda

IPC分类号： H03F3/38

CPC分类号： H03F3/2173 ,  H03F3/2171 ,  H03F2200/331

摘要： A class D power amplifier (1) switches a power supply voltage VDD at high-speed in response to an input digital audio signal Pin to power-amplify the digital audio signal Pin, and supplies a speaker (2) with the amplified signal. In the case of being incorporated in an AM receiver formed integrally with an AM tuner (3) for receiving AM broadcasts, the class D power amplifier (1) can reduces influence of reception interference with respect to the AM tuner (3). As a result, it is possible to provide a power amplifier that can suppress unnecessary radiation to reduce reception interference with respect to the tuner, not by changing a carrier frequency, but by controlling the drive signal generation systems.

摘要翻译： D类功率放大器（1）响应于中的输入数字音频信号P _{高速切换电源电压V DD，以对数字音频进行放大 信号P ，并向扬声器（2）提供放大信号。 在与用于接收AM广播的AM调谐器（3）一体形成的AM接收机的情况下，D类功率放大器（1）可以减少对AM调谐器（3）的接收干扰的影响。 结果，可以提供能够抑制不必要的辐射的功率放大器，而不是通过改变载波频率而是通过控制驱动信号发生系统来减少对调谐器的接收干扰。}

公开(公告)号：US20050285670A1

公开(公告)日：2005-12-29

申请号：US10536999

申请日：2003-12-12

申请人： Kazunobu Ohkuri ,  Toshihiko Masuda

发明人： Kazunobu Ohkuri ,  Toshihiko Masuda

IPC分类号： H03F1/26 ,  H03F3/181 ,  H03F3/217 ,  H03G3/34 ,  H03M3/04 ,  H03F3/38

CPC分类号： H03F3/2175 ,  H03F3/181 ,  H03F2200/331 ,  H03G3/34 ,  H03M3/328 ,  H03M3/346 ,  H03M3/506

摘要： In an audio amplifier having a D-class power amplifier, a noise upon muting is suppressed. There are provided a sampling rate converter circuit 23 for sampling rate converting a digital audio signal S11 into a digital audio signal S23, and a ΔΣ modulation circuit 14 for re-quantizing the digital audio signal S23 into a bit-reduced digital audio signal S14. Further, there are provided a PWM modulation circuit 15 for converting the digital audio signal S14 into a PWM signal S15, and a D-class power amplifier 16 to which the PWM signal S15 is supplied. Still further, there are provided a dither signal forming circuit 18 for superimposing a dither signal SDI on the digital audio signal S23, and a forming circuit 19 for forming a muting signal SDET. Upon muting, an input side of the sampling rate converter circuit 23 is stopped by the muting signal SDET.

摘要翻译： 在具有D级功率放大器的音频放大器中，抑制静音时的噪声。 提供了用于将数字音频信号S11进行采样率转换为数字音频信号S23的采样率转换器电路23和用于将数字音频信号S 23重新量化为比特缩小的数字音频的DeltaSigma调制电路14 信号S 14。 此外，还提供了用于将数字音频信号S14转换为PWM信号S15的PWM调制电路15以及供给PWM信号S15的D级功率放大器16。 另外，还提供了用于将抖动信号SDI叠加在数字音频信号S23上的抖动信号形成电路18和用于形成静噪信号SDET的形成电路19。 在静音时，采样率转换器电路23的输入侧被静噪信号SDET停止。

公开(公告)号：US20120140952A1

公开(公告)日：2012-06-07

申请号：US13311649

申请日：2011-12-06

申请人： Masaru Shimura ,  Taro Nakagami ,  Kazunobu Ohkuri

发明人： Masaru Shimura ,  Taro Nakagami ,  Kazunobu Ohkuri

IPC分类号： H03G5/00

CPC分类号： H04R3/04 ,  H03G5/165 ,  H04R2430/03

摘要： An audio signal processing apparatus and method for extracting components from an input signal, generating additional components, combining components, and level-controlling components. An audio signal processing apparatus may include a harmonic overtone adder and an equalizer. A harmonic overtone adder may include a high-pass filter, a low-pass filter, an harmonic overtone generator, and a combining unit. An equalizer may include a level detector and a gain controller.

摘要翻译： 一种用于从输入信号中提取组件，产生附加组件，组合组件和级别控制组件的音频信号处理设备和方法。 音频信号处理装置可以包括谐波泛音加法器和均衡器。 谐波泛音加法器可以包括高通滤波器，低通滤波器，谐波泛音发生器和组合单元。 均衡器可以包括电平检测器和增益控制器。

公开(公告)号：US08150067B2

公开(公告)日：2012-04-03

申请号：US12075538

申请日：2008-03-12

申请人： Kazunobu Ohkuri ,  Taro Nakagami ,  Masaru Shimura

发明人： Kazunobu Ohkuri ,  Taro Nakagami ,  Masaru Shimura

IPC分类号： H03G5/00

CPC分类号： H04R3/04 ,  H03G5/165 ,  H04R3/08

摘要： If the absolute value of the current sample is greater than or equal to an envelope value at the immediately preceding sample, an envelope value at the current sample is made greater than the envelope value at the immediately preceding sample. If the absolute value of the current sample is smaller than the envelope value at the immediately preceding sample and a count value C does not reach a predetermined number N, the count value C is incremented by one and the envelope value at the current sample is held at the envelope value at the immediately preceding sample. If the absolute value of the current sample is smaller than the envelope value at the immediately preceding sample and the count value C reaches the predetermined number N, the envelope value at the current sample is made smaller than the envelope value at the immediately preceding sample.

摘要翻译： 如果当前样本的绝对值大于或等于紧接在前样本的包络值，则使当前样本的包络值大于紧接在前样本的包络值。 如果当前采样的绝对值小于紧接在前的采样的包络值，并且计数值C未达到预定数量N，则计数值C增加1，并且保持当前采样的包络值 在前一样品的包络值处。 如果当前样本的绝对值小于紧接在前样本的包络值，并且计数值C达到预定数量N，则使当前样本的包络值小于紧接在前样本的包络值。

公开(公告)号：US08094835B2

公开(公告)日：2012-01-10

申请号：US11903568

申请日：2007-09-24

申请人： Masaru Shimura ,  Taro Nakagami ,  Kazunobu Ohkuri

发明人： Masaru Shimura ,  Taro Nakagami ,  Kazunobu Ohkuri

IPC分类号： H04B15/00

CPC分类号： H03G5/16 ,  H04R3/04 ,  H04R5/04

摘要： A signal processing apparatus includes first and second extracting units extracting frequency components having a first frequency band and a second frequency band, respectively, from an input audio signal, a first-harmonic-component generating unit generating a first-harmonic-component signal including a frequency component whose frequency is N1 times that of the frequency component extracted in the first extracting unit, a second-harmonic-component generating unit generating a second-harmonic-component signal including a frequency component whose frequency is N2 times that of the frequency component extracted in the second extracting unit, and a combining unit combining the input audio signal, and the first- and the second-harmonic-component signals in a predetermined ratio. The first frequency band is higher than the second frequency band. N1 and N2 are positive integers, and N1 is smaller than N2.

摘要翻译： 信号处理装置包括分别从输入音频信号中提取具有第一频带和第二频带的频率分量的第一和第二提取单元，产生包括第一频率分量的第一谐波分量信号的第一谐波分量产生单元 频率分量，其频率是在第一提取单元中提取的频率分量的频率的N1倍;二次谐波分量产生单元，其生成包括频率为提取的频率分量的频率的N2的频率分量的二次谐波分量信号 以及以预定比例组合输入音频信号和第一和第二谐波分量信号的组合单元。 第一频带高于第二频带。 N1和N2是正整数，N1小于N2。