公开(公告)号：US4204176A

公开(公告)日：1980-05-20

申请号：US893014

申请日：1978-04-03

申请人： Yoshitaka Takasaki ,  Yasuhiro Kita ,  Junichi Nakagawa ,  Kohei Ishizuka

发明人： Yoshitaka Takasaki ,  Yasuhiro Kita ,  Junichi Nakagawa ,  Kohei Ishizuka

IPC分类号： H03H7/01 ,  H04B3/14 ,  H03H7/14

CPC分类号： H04B3/145

摘要： A variable equalizer whose frequency characteristic varies in a range of 1-1/Y(f).sup.2when the gain x of a variable amplifier varies from 0 (zero) to .infin. (infinity), and which reduces the number of shaping networks for the variable frequency characteristic.It is constructed of a forward pass circuit which consists of a variable amplifier and a frequency-dependent first circuit connected in the order mentioned between input and output terminals, a feedback pass circuit which is dependent upon the frequency and which feeds-back an output of the variable amplifier to an input thereof, and a feed forward pass circuit which is independent of the frequency and which feeds forward part of the input of the variable amplifier to an output of the first circuit.

摘要翻译： 当可变放大器的增益x从0（零）到INFINITY（无穷大）变化时，其频率特性在1-1 / Y（f）2的范围内变化的可变均衡器，并且这减少了 可变频率特性。 它由正向电路构成，该正向电路由可变放大器和按照输入和输出端之间的顺序连接的频率依赖的第一电路组成，反馈通道电路取决于频率，并且反馈输出 可变放大器到其输入端，以及前馈传输电路，其独立于频率，并且将可变放大器的输入的前部部分馈送到第一电路的输出。

公开(公告)号：US4097824A

公开(公告)日：1978-06-27

申请号：US772677

申请日：1977-02-28

申请人： Kohei Ishizuka ,  Yasuhiro Kita ,  Yoshitaka Takasaki ,  Junichi Nakagawa

发明人： Kohei Ishizuka ,  Yasuhiro Kita ,  Yoshitaka Takasaki ,  Junichi Nakagawa

IPC分类号： H03H7/01 ,  H03H11/04 ,  H04B3/14 ,  H03H7/14

CPC分类号： H04B3/14 ,  H04B3/145

摘要： A variable equalizer adapted to be fabricated in an integrated circuit structure and having improved compensation characteristics comprises a parallel connection of two circuits, one including a series connection of a first impedance circuit (impedance: Zy) and an input A.C. signal source circuit having a voltage v.sub.i, the other comprising a series connection of a second impedance circuit (impedance: Z.sub.x) and an A.C. signal source circuit having a voltage amplitude v.sub.z which is equal to v.sub.i (K/Z.sub.y).sup.2, where K is a constant, and the second impedance circuit, consists of a variable resistor.

摘要翻译： 适于以集成电路结构制造并具有改进的补偿特性的可变均衡器包括两个电路的并联连接，一个包括第一阻抗电路（阻抗：Zy）的串联连接和具有电压的输入AC信号源电路 vi，另一个包括第二阻抗电路（阻抗：Zx）和具有等于vi（K / Zy）2的电压幅度vz的AC信号源电路的串联连接，其中K是常数，第二 阻抗电路由可变电阻组成。

公开(公告)号：US20150295659A1

公开(公告)日：2015-10-15

申请号：US14354293

申请日：2012-01-25

申请人： Masamichi Nogami ,  Satoshi Yoshima ,  Masaki Noda ,  Junichi Nakagawa

发明人： Masamichi Nogami ,  Satoshi Yoshima ,  Masaki Noda ,  Junichi Nakagawa

IPC分类号： H04B10/60 ,  H04J14/08 ,  H04B10/27

CPC分类号： H04B10/60 ,  H03F3/08 ,  H04B10/07955 ,  H04B10/27 ,  H04B10/272 ,  H04B10/69 ,  H04J14/08

摘要： An optical receiver includes a light receiving element configured to convert an input light signal into an electric current, a current mirror circuit including a reference current side transistor and a mirror current side transistor, the transistor being connected to the light receiving element, a current-voltage conversion circuit configured to convert an output current from the transistor into a voltage and output the voltage as a light reception level monitor voltage of the light receiving element, and a current sink circuit connected to the transistor and configured to feed an electric current to the transistor.

摘要翻译： 一种光接收器包括被配置为将输入光信号转换为电流的光接收元件，包括参考电流侧晶体管和反射镜电流侧晶体管的电流镜电路，该晶体管连接到光接收元件， 电压转换电路，被配置为将来自晶体管的输出电流转换为电压，并将作为光接收元件的光接收电平监视电压的电压输出;以及连接到晶体管并被配置为将电流馈送到 晶体管。

公开(公告)号：US09094134B2

公开(公告)日：2015-07-28

申请号：US14003139

申请日：2011-04-05

申请人： Masaki Noda ,  Masamichi Nogami ,  Junichi Nakagawa

发明人： Masaki Noda ,  Masamichi Nogami ,  Junichi Nakagawa

IPC分类号： H04B10/69 ,  H03G3/30

CPC分类号： H04B10/6931 ,  H03G3/3084 ,  H04B10/693

摘要： An optical receiver including: a preamplifier capable of changing a conversion gain in accordance with a reception level of a received burst signal; a gain control circuit capable of switching between a fast time constant and a slow time constant; and a convergence determination circuit for outputting a time constant switching signal in accordance with a state of the gain control circuit (transient state or steady state) and a reset signal between the burst signals. This configuration can switch the time constant of the gain control circuit at an appropriate timing.

摘要翻译： 一种光接收机，包括：前置放大器，其能够根据接收到的突发信号的接收电平来改变转换增益; 能够在快速时间常数和慢时间常数之间切换的增益控制电路; 和用于根据增益控制电路的状态（瞬态或稳态）输出时间常数切换信号和突发信号之间的复位信号的会聚判定电路。 该配置可以在适当的时刻切换增益控制电路的时间常数。

公开(公告)号：US09002107B2

公开(公告)日：2015-04-07

申请号：US12962895

申请日：2010-12-08

申请人： Junichi Nakagawa ,  Hiroyuki Sakai ,  Kiyoshi Umeda

发明人： Junichi Nakagawa ,  Hiroyuki Sakai ,  Kiyoshi Umeda

IPC分类号： G06K9/00 ,  G06T11/00

CPC分类号： G06T11/001

摘要： An image processing apparatus for applying a color balance correction to input image data, comprises a detection unit which detects an object included in the image data; an object color calculation unit which calculates an object color as a color of the object; an acquisition unit which acquires a highlight color in the image data; a calculation unit which calculates a correction value for the object color and the highlight color based on a relative positional relationship between the object color and the highlight color on a color space; and a color balance correction unit which applies the color balance correction to the highlight color and the object color using the correction value.

摘要翻译： 一种用于对输入图像数据应用色彩平衡校正的图像处理装置，包括：检测单元，其检测包括在图像数据中的对象; 对象颜色计算单元，其计算作为对象的颜色的对象颜色; 获取单元，其获取图像数据中的高亮颜色; 计算单元，其基于颜色空间上的对象颜色和高亮颜色之间的相对位置关系来计算对象颜色和高亮颜色的校正值; 以及颜色平衡校正单元，其使用校正值将颜色平衡校正应用于高亮颜色和对象颜色。

公开(公告)号：US08953234B2

公开(公告)日：2015-02-10

申请号：US12966743

申请日：2010-12-13

申请人： Ryosuke Iguchi ,  Nobutaka Miyake ,  Tohru Ikeda ,  Akitoshi Yamada ,  Mitsuhiro Ono ,  Fumitaka Goto ,  Hidetsugu Kagawa ,  Tomokazu Ishikawa ,  Junichi Nakagawa ,  Senichi Saito

发明人： Ryosuke Iguchi ,  Nobutaka Miyake ,  Tohru Ikeda ,  Akitoshi Yamada ,  Mitsuhiro Ono ,  Fumitaka Goto ,  Hidetsugu Kagawa ,  Tomokazu Ishikawa ,  Junichi Nakagawa ,  Senichi Saito

IPC分类号： H04N1/46 ,  H04N1/54 ,  H04N1/60 ,  H04N1/405 ,  G03F3/00 ,  G06K15/02 ,  B41J2/135 ,  B41J2/14 ,  H04N1/401

CPC分类号： H04N1/6033 ,  H04N1/4015 ,  H04N1/6041

摘要： An image processing apparatus is provided that is capable of very accurately and efficiently reducing uneven color caused by variation in ejection characteristics among nozzles that eject ink and that occurs in a color image that is formed by mixing a plurality of different kinds of ink. A patch is printed by ejected ink from a plurality of nozzles, a region is specified so as to perform color correction in a test color image that is printed on a printing medium, a plurality of different color correction processing is performed on color signals that correspond to a color correction region, a plurality of color correction patches are printed, a color correction patch to be used is selected from among the plurality of different color correction patches and table parameters that correspond to the nozzles are created based on the selected color correction processing.

摘要翻译： 提供一种图像处理装置，其能够非常精确和有效地减少由喷射墨水的喷嘴之间的喷射特性的变化引起的不均匀颜色，并且发生在通过混合多种不同种类的油墨而形成的彩色图像中。 通过从多个喷嘴喷射的墨水印刷贴片，指定区域以在打印介质上打印的测试彩色图像中进行颜色校正，对与之对应的颜色信号执行多个不同的颜色校正处理 对于颜色校正区域，打印多个颜色校正斑块，从多个不同颜色校正斑块中选择要使用的颜色校正贴片，并且基于所选择的颜色校正处理创建与喷嘴相对应的表格参数 。

公开(公告)号：US08911048B2

公开(公告)日：2014-12-16

申请号：US12963657

申请日：2010-12-09

申请人： Akitoshi Yamada ,  Ryosuke Iguchi ,  Nobutaka Miyake ,  Tohru Ikeda ,  Mitsuhiro Ono ,  Fumitaka Goto ,  Hidetsugu Kagawa ,  Tomokazu Ishikawa ,  Junichi Nakagawa ,  Senichi Saito

发明人： Akitoshi Yamada ,  Ryosuke Iguchi ,  Nobutaka Miyake ,  Tohru Ikeda ,  Mitsuhiro Ono ,  Fumitaka Goto ,  Hidetsugu Kagawa ,  Tomokazu Ishikawa ,  Junichi Nakagawa ,  Senichi Saito

IPC分类号： B41J29/38 ,  B41J2/21

CPC分类号： B41J2/2139

摘要： When printing an image using a plurality of inks, color unevenness caused by variations in ejection characteristics among nozzles is corrected at suitable timings in accordance with change in the color unevenness over time, and favorable image output without noticeably color unevenness is maintained. For this purpose, parameters are prepared, for colors formed by combinations of at least two colors of ink, the parameters being determined so as to reduce differences in coloration on a print medium caused by individual variations in the ejection characteristics of a plurality of nozzles. When printing, a first color signal included in individual pixels is corrected for a second color signal by using the parameters. Information regarding the ejection volume characteristics of a plurality of nozzles is acquired as appropriate, and by estimating changes in coloration from this information, suitable timings for overwriting such parameters are determined.

摘要翻译： 当使用多种油墨打印图像时，根据颜色不均匀随时间的变化在合适的时刻校正由喷嘴之间的喷射特性的变化引起的颜色不均匀性，并且保持良好的图像输出而没有明显的颜色不均匀。 为此，为了通过至少两种颜色的油墨的组合而形成的颜色，准备参数，确定这些参数，以减少由多个喷嘴的喷射特性的各种变化引起的打印介质上的着色差异。 当打印时，通过使用参数来校正包括在各个像素中的第一颜色信号用于第二颜色信号。 关于多个喷嘴的喷射体积特性的信息被适当地获取，并且通过根据该信息估计着色的变化，确定用于重写这些参数的合适的定时。

公开(公告)号：US20120099865A1

公开(公告)日：2012-04-26

申请号：US13379369

申请日：2009-06-23

申请人： Kenji Ishii ,  Junichi Nakagawa

发明人： Kenji Ishii ,  Junichi Nakagawa

IPC分类号： H04J14/00 ,  H04B10/18 ,  H04L27/01

CPC分类号： H04L25/03159 ,  H04L25/03343 ,  H04L27/2607 ,  H04L27/2636

摘要： In an optical access system, the OLT includes a CP inserting unit that inserts a CP into a downlink signal; a CP removing unit that removes a CP from an uplink signal received from the ONU; and an FFT unit, an EQ unit, and an inverse FFT unit that perform equalization on the uplink CP-removed signal according to a frequency domain equalization scheme based on an inverse characteristic of the characteristic of a transmission line leading to the ONU. The ONU includes a CP inserting unit; a CP removing unit; and an FFT unit, an EQ unit, and an inverse FFT unit that perform equalization on the downlink CP-removed signal according to the frequency domain equalization scheme based on an inverse characteristic of the prestored characteristic of the a transmission line leading to the OLT.

摘要翻译： 在光接入系统中，OLT包括将CP插入下行链路信号的CP插入单元; CP去除单元，从从ONU接收的上行链路信号中去除CP; 以及FFT单元，EQ单元和逆FFT单元，其基于通向ONU的传输线的特性的反特性，根据频域均衡方案对上行链路CP去除信号执行均衡。 ONU包括CP插入单元; CP去除单元; 以及FFT单元，EQ单元和逆FFT单元，其基于通向OLT的传输线的预存储特性的反特性，根据频域均衡方案对下行链路CP去除信号执行均衡。

公开(公告)号：US08155535B2

公开(公告)日：2012-04-10

申请号：US12086292

申请日：2006-03-03

申请人： Masaki Noda ,  Masamichi Nogami ,  Junichi Nakagawa

发明人： Masaki Noda ,  Masamichi Nogami ,  Junichi Nakagawa

IPC分类号： H04B10/06

CPC分类号： H03F3/08 ,  H03G3/001 ,  H03G3/3084 ,  H04B10/6931

摘要： An optical receiver for stably reproducing packets having different light receiving levels is disclosed. The optical receiver includes: a light receiving element for outputting a current in response to a light receiving level of an optical signal; a preamplifier for converting the current signal outputted from the light receiving element into a voltage signal; a circuit for detecting a consecutive same binary symbols portion from a binary symbols stream of the voltage signal outputted from the preamplifier to output a time constant switching signal in response to a detection result thereof; a level detecting circuit for detecting a voltage level of the voltage signal outputted from the preamplifier based upon a time constant which is switched/controlled in response to the time constant switching signal; and an amplifier for amplifying an output voltage of the level detecting circuit to apply a control voltage for controlling the gain to the preamplifier.

摘要翻译： 公开了一种用于稳定再现具有不同光接收电平的分组的光接收机。 光接收器包括：用于响应于光信号的光接收电平输出电流的光接收元件; 用于将从光接收元件输出的电流信号转换为电压信号的前置放大器; 用于从前置放大器输出的电压信号的二进制符号流检测连续相同的二进制符号部分的电路，以响应其检测结果输出时间常数切换信号; 电平检测电路，用于基于响应于时间常数切换信号而被切换/控制的时间常数来检测从前置放大器输出的电压信号的电压电平; 以及放大器，用于放大电平检测电路的输出电压，以将用于控制增益的控制电压施加到前置放大器。

公开(公告)号：US20120081768A1

公开(公告)日：2012-04-05

申请号：US12966743

申请日：2010-12-13

申请人： Ryosuke Iguchi ,  Nobutaka Miyake ,  Tohru Ikeda ,  Akitoshi Yamada ,  Mitsuhiro Ono ,  Fumitaka Goto ,  Hidetsugu Kagawa ,  Tomokazu Ishikawa ,  Junichi Nakagawa ,  Senichi Saito

发明人： Ryosuke Iguchi ,  Nobutaka Miyake ,  Tohru Ikeda ,  Akitoshi Yamada ,  Mitsuhiro Ono ,  Fumitaka Goto ,  Hidetsugu Kagawa ,  Tomokazu Ishikawa ,  Junichi Nakagawa ,  Senichi Saito

IPC分类号： G03F3/08

CPC分类号： H04N1/6033 ,  H04N1/4015 ,  H04N1/6041

摘要： An image processing apparatus is provided that is capable of very accurately and efficiently reducing uneven color caused by variation in ejection characteristics among nozzles that eject ink and that occurs in a color image that is formed by mixing a plurality of different kinds of ink. A patch is printed by ejected ink from a plurality of nozzles, a region is specified so as to perform color correction in a test color image that is printed on a printing medium, a plurality of different color correction processing is performed on color signals that correspond to a color correction region, a plurality of color correction patches are printed, a color correction patch to be used is selected from among the plurality of different color correction patches and table parameters that correspond to the nozzles are created based on the selected color correction processing.

摘要翻译： 提供一种图像处理装置，其能够非常精确和有效地减少由喷射墨水的喷嘴之间的喷射特性的变化引起的不均匀颜色，并且发生在通过混合多种不同种类的油墨而形成的彩色图像中。 通过从多个喷嘴喷射的墨水印刷贴片，指定区域以在打印介质上打印的测试彩色图像中进行颜色校正，对与之对应的颜色信号执行多个不同的颜色校正处理 对于颜色校正区域，打印多个颜色校正斑块，从多个不同颜色校正斑块中选择要使用的颜色校正贴片，并且基于所选择的颜色校正处理创建与喷嘴相对应的表格参数 。