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49 条记录 (耗时 0.023 秒)

    Method of activating optical communication system, channel increasing/decreasing method, and computer-readable recording medium
    15.
    发明授权
    Method of activating optical communication system, channel increasing/decreasing method, and computer-readable recording medium 有权
    光通信系统的激活方法，信道增减方法以及计算机可读介质

    公开(公告)号：US06839160B2

    公开(公告)日：2005-01-04

    申请号：US10132326

    申请日：2002-04-26

    申请人： Takashi Tsuda ,  Kazuo Yamane ,  Makoto Murakami ,  Tooru Shima ,  Tooru Matsumoto ,  Hiroyuki Iwaki ,  Kazuto Imai

    发明人： Takashi Tsuda ,  Kazuo Yamane ,  Makoto Murakami ,  Tooru Shima ,  Tooru Matsumoto ,  Hiroyuki Iwaki ,  Kazuto Imai

    IPC分类号： H04B10/07 ,  H04B10/29 ,  H04B10/293 ,  H04B10/296 ,  H04B10/564 ,  H04B10/572 ,  H04J14/02 ,  G02F1/33 ,  H01S3/00 ,  H04B10/12

    CPC分类号： H04J14/0221 ,  H04B10/2942 ,  H04B2210/258 ,  H04J14/021 ,  H04J14/0213

    摘要： The invention relates to a method of activating an optical communication system comprising a plurality of optical amplifiers having an optical amplifier, between optical transmission lines in which wavelength-division multiplex optical signals are transmitted. The method comprises steps of: generating a desired slope in a desired wavelength range of a gain wavelength curve of the optical amplifier; adjusting an output of the optical amplifier to a desired output level; performing the above two steps in a plurality of optical repeater stations, the steps being carried out in sequence from the first to the last optical repeater stations; and adjusting a level in each optical signal in the wavelength-division multiplex optical signal so as to have substantially constant optical signal-to-noise ratios in the optical signals to be received. Activating the optical communication system according to this procedure allows proper execution of gain slope compensation, output control, and pre-emphasis control.

    摘要翻译： 本发明涉及一种激活光通信系统的方法，该光通信系统包括多个具有光放大器的光放大器，在其中传输波分复用光信号的光传输线之间。 该方法包括以下步骤：在光放大器的增益波长曲线的期望波长范围内产生期望的斜率; 将所述光放大器的输出调节到期望的输出电平; 在多个光学中继站中执行上述两个步骤，该步骤是从第一个到最后一个光中继站进行的; 并调整波分多路复用光信号中的每个光信号的电平，使得要接收的光信号中的光信噪比基本上恒定。 根据该程序激活光通信系统允许正确执行增益斜率补偿，输出控制和预加重控制。

    Analog-to-digital converter utilizing a random noise source
    18.
    发明授权
    Analog-to-digital converter utilizing a random noise source 失效
    使用随机噪声源的模数转换器

    公开(公告)号：US4034367A

    公开(公告)日：1977-07-05

    申请号：US551283

    申请日：1975-02-20

    申请人： Takashi Sugiyama ,  Takashi Tsuda

    发明人： Takashi Sugiyama ,  Takashi Tsuda

    IPC分类号： H03M1/00 ,  H03K13/02

    CPC分类号： H03M1/201

    摘要： An analog-to-digital converter arranged to accept an analog input signal and to convert it into an output having digital form. The converter is characterized by a reference random noise source which generates random noise signals with uniform amplitude occurrence probability density in a given range, and by an amplitude comparator arranged to repeatedly compare the amplitude of the random noise signal with the amplitude of a signal varying with the analog signal to be converted. The amplitude comparator supplies output pulses in accordance with the comparisons, e.g., whenever the analog signal amplitude is greater than the random noise amplitude, and the number of pulses from the amplitude comparator in a measurement interval then digitally corresponds to the value of the analog signal and may be utilized, as in a display. Resolution of the converter is increased beyond the minimum amplitude increment of the random noise source signal in one embodiment by superposition on either the analog signal or the random noise signal of a triangular wave with an amplitude greater than the minimum amplitude increment of the random noise signal, and in another embodiment by superposition of a second random noise signal.

    摘要翻译： 一种模拟 - 数字转换器，被配置为接受模拟输入信号并将其转换成具有数字形式的输出。 转换器的特征在于参考随机噪声源，其产生在给定范围内具有均匀振幅发生概率密度的随机噪声信号，并且通过幅度比较器布置成重复地比较随机噪声信号的振幅与随 要转换的模拟信号。 幅度比较器根据比较提供输出脉冲，例如，每当模拟信号幅度大于随机噪声幅度时，并且在测量间隔中来自幅度比较器的脉冲数然后数字地对应于模拟信号的值 并且可以如在显示器中那样被利用。 在一个实施例中，转换器的分辨率增加到随机噪声源信号的最小幅度增量之外，通过叠加具有大于随机噪声信号的最小振幅增量的三角波的模拟信号或随机噪声信号 ，并且在另一个实施例中通过叠加第二随机噪声信号。

    Camera head separated type camera device
    19.
    发明授权
    Camera head separated type camera device 有权
    相机头分离式相机装置

    公开(公告)号：US08411138B2

    公开(公告)日：2013-04-02

    申请号：US12787157

    申请日：2010-05-25

    申请人： Takashi Tsuda ,  Hiroshi Shinozaki ,  Masatoshi Ookubo ,  Kei Tashiro ,  Hiroyuki Irikura

    发明人： Takashi Tsuda ,  Hiroshi Shinozaki ,  Masatoshi Ookubo ,  Kei Tashiro ,  Hiroyuki Irikura

    IPC分类号： H04N7/18

    CPC分类号： H04N5/23209 ,  H04N5/23203 ,  H04N2005/2255

    摘要： According to an aspect of the present invention, there is provided a camera head separated type camera device including: a camera head; a camera control unit; and a cable connecting the camera head and the camera control unit with each other, wherein the camera control unit includes: a control portion which feeds a predetermined DC (Direct Current) voltage to the camera head, and wherein the camera head includes: an LVDS conversion driver portion which transmits an LVDS (Low Voltage Differential Signaling) signal to the camera control unit; a correction control portion which outputs a correction value for the LVDS signal; and an LVDS control portion which controls the LVDS conversion driver portion based on the correction value.

    摘要翻译： 根据本发明的一个方面，提供了一种相机头分离型相机装置，包括：相机头; 相机控制单元; 以及将相机头和相机控制单元彼此连接的电缆，其中所述照相机控制单元包括：将预定DC（直流）电压馈送到所述相机头的控制部分，并且其中所述相机头包括：LVDS 转换驱动器部分，其向相机控制单元发送LVDS（低电压差分信号）信号; 校正控制部分，输出LVDS信号的校正值; 以及LVDS控制部分，其基于校正值来控制LVDS转换驱动器部分。

    Method and apparatus for imaging
    20.
    发明授权
    Method and apparatus for imaging 有权
    成像方法和装置

    公开(公告)号：US08054351B2

    公开(公告)日：2011-11-08

    申请号：US12714191

    申请日：2010-02-26

    申请人： Takashi Tsuda

    发明人： Takashi Tsuda

    IPC分类号： H04N5/217

    CPC分类号： H04N9/045

    摘要： According to one embodiment, a shading correction circuit, which corrects for the influence of ambient light quantity shading, for input image light from three CCD sensors of R, G and B, based on a distance from the center of a screen. A shading correction circuit does not make correction for a maximum correction area which is out of a circle with a distance a from the central part of a screen, and corrects for the influence of ambient light quantity shading for a minimum correction area with a distance b from the central part of a screen, after calculating a square L2 of an address distance of each pixel of a correction object obtained by using a vertical distance and a horizontal distance from an address of the central part of a screen.

    摘要翻译： 根据一个实施例，一种阴影校正电路，其校正来自R，G和B的三个CCD传感器的输入图像光的环境光量阴影的影响，基于距离屏幕中心的距离。 阴影校正电路不对距离屏幕中心距离a的圆圈以外的最大校正区域进行校正，并且将距离b的最小校正区域的环境光量阴影的影响校正 在从屏幕的中心部分的地址利用垂直距离和水平距离计算校正对象的每个像素的地址距离的平方L2之后，从屏幕的中心部分。