公开(公告)号：US6118479A

公开(公告)日：2000-09-12

申请号：US235486

申请日：1999-01-22

申请人： Kazuki Maeda ,  Kuniaki Utsumi ,  Susumu Morikura

发明人： Kazuki Maeda ,  Kuniaki Utsumi ,  Susumu Morikura

IPC分类号： H04J14/02 ,  H04L1/20 ,  H04N7/22 ,  H04N17/00 ,  H04B17/00 ,  H04K1/10 ,  H04L23/02

CPC分类号： H04N7/22 ,  H04L1/20 ,  H04N17/00 ,  H04J14/0298

摘要： In FIG. 5, a plurality of signal sources 21.sub.1 to 21.sub.N each generate a carrier with different frequencies. A pulse signal generating portion 23 generates a pulse signal with the same period and time width as those of a horizontal synchronizing signal in NTSC system color television broadcasting. Delay devices 32.sub.1 to 32.sub.N delay timing of the pulse signal for a randomly predetermined delay amount. Level adjuster 52.sub.1 to 52.sub.N generate a modulating signal by adjusting each pulse base of the delayed pulse signal for a level within a range between 12.5% and 74.375% with respect to a pulse top. Modulators 42.sub.1 to 42.sub.N output a signal obtained by modulating the carrier with the modulating signal. A multiplex portion 24 multiplexes the modulated signals to output a resultant signal as a test signal. The error rate of a QAM signal is evaluated with the test signal. It is therefore possible to evaluate the error rate of the QAM signal in a signal state approximate at the maximum to a state of an actual AM video signal (that is, analogous distribution characteristics of the multiplex signal amplitude). In the error rate evaluation method according to an embodiment of the present invention, it is thus possible to accurately evaluate the error rate of the QAM signal under the strictest conditions, which may occur in the actual, AM video signal, thereby ensuring the reliability of the entire CATV system.

摘要翻译： 在图 如图5所示，多个信号源211〜21N分别生成不同频率的载波。 脉冲信号生成部23生成与NTSC制彩色电视广播中的水平同步信号相同的周期和时间宽度的脉冲信号。 延迟装置321至32N延迟脉冲信号的定时以随机预定的延迟量。 电平调节器521至52N通过相对于脉冲顶部调整在12.5％至74.375％之间的范围内的电平来调节延迟脉冲信号的每个脉冲基，产生调制信号。 调制器421至42N输出通过调制信号调制载波获得的信号。 复用部分24复用调制信号以输出结果信号作为测试信号。 用测试信号评估QAM信号的误码率。 因此，可以以最大到实际AM视频信号的状态（即，复用信号幅度的类似分布特性）近似的信号状态来评估QAM信号的误码率。 在根据本发明的实施例的错误率评估方法中，因此可以在实际的AM视频信号中可能发生的最严格条件下准确地评估QAM信号的错误率，从而确保可靠性 整个CATV系统。

公开(公告)号：US5539657A

公开(公告)日：1996-07-23

申请号：US54195

申请日：1993-04-30

申请人： Kuniaki Utsumi ,  Hiroaki Nakata ,  Susumu Morikura ,  Hiroaki Yamamoto ,  Kazuki Maeda ,  Masaru Fuse

发明人： Kuniaki Utsumi ,  Hiroaki Nakata ,  Susumu Morikura ,  Hiroaki Yamamoto ,  Kazuki Maeda ,  Masaru Fuse

IPC分类号： H04B10/27 ,  H04B10/29 ,  H04B10/54 ,  H04B10/556 ,  H04N5/00 ,  H04N5/44 ,  H04N7/10 ,  H04N7/16 ,  H04N7/22 ,  H04N21/61 ,  H04N21/647 ,  H04J4/00

CPC分类号： H04N7/16 ,  H04N7/22

摘要： A picture image distributing apparatus provided within a passenger moving vehicle, consists of: a head end portion for multichannel FDM picture image signals; an electrical optical for converting the FDM picture image signals into optical signals; an optical amplifier for optically amplifying the optical outputs; one optical fiber transmission path connected to optical taps of unequal distribution for branching halfway on one portion of the optical power except for the branching at a final point, an optical/electrical converter for receiving optical signals branched at the final point or halfway so as to convert them into electrical signals; and a passenger seat picture image receiving terminal connected to the optical/electrical converter so as to receive the electrical signals.

摘要翻译： 设置在乘客移动车辆内的图像分配装置包括：用于多通道FDM图像信号的头端部分; 用于将FDM图像信号转换成光信号的电光学装置; 用于光学放大光输出的光放大器; 一个光纤传输路径连接到不同分布的光学抽头，用于除了最终点之间的分支之外的一部分光功率的一部分上的分支;光/电转换器，用于接收在最终点或中途分支的光信号，以便 将其转换为电信号; 以及连接到光/电转换器的乘客座位图像接收终端，以便接收电信号。

公开(公告)号：US06292673B1

公开(公告)日：2001-09-18

申请号：US09343681

申请日：1999-06-30

申请人： Kazuki Maeda ,  Hiroyuki Sasai ,  Kouichi Masuda ,  Susumu Morikura

发明人： Kazuki Maeda ,  Hiroyuki Sasai ,  Kouichi Masuda ,  Susumu Morikura

IPC分类号： H04B700

CPC分类号： H04B1/04

摘要： A signal including an RF signal and a code division multiple access signal is transmitted so that, in relation to both of the RF signal and the code division multiple access signal, a receiving end can obtain a signal having sufficiently larger power as compared with noise and with no distortion. In order to attain this object, a separation part separates the signal into the RF signal and the code division multiple access signal at a sending end. An amplification part amplifies the RF signal with an amplification factor related to its power. An amplification part amplifies the code division multiple access signal with an amplification factor related to its power. A combination part combines the amplified RF signal and the amplified code division multiple access signal with each other.

摘要翻译： 发送包括RF信号和码分多址信号的信号，使得相对于RF信号和码分多址信号两者，接收端可以获得与噪声相比具有足够大功率的信号，并且 没有失真。 为了实现这个目的，分离部分在发送端将信号分离成RF信号和码分多址信号。 放大部分以与其功率相关的放大因子放大RF信号。 放大部分以与其功率相关的放大因子放大码分多址信号。 组合部分将放大的RF信号和放大的码分多址信号彼此组合。

公开(公告)号：US07212745B2

公开(公告)日：2007-05-01

申请号：US09988706

申请日：2001-11-20

申请人： Kazunori Numata ,  Satoshi Furusawa ,  Susumu Morikura

发明人： Kazunori Numata ,  Satoshi Furusawa ,  Susumu Morikura

IPC分类号： H04B10/00 ,  H04B10/12

CPC分类号： G02B6/4204 ,  G02B6/02 ,  G02B6/02033 ,  G02B6/14 ,  G02B6/268 ,  G02B6/32 ,  G02B6/421 ,  H04B10/2581

摘要： In an optical transmission system, a lens converges an optical signal outputted from a light emission element. The optical signal having passed .through the lens enters a multi-mode fiber (MMF). A vertex of the lens and an input plane of the MMF are at a distance. The distance is set to a value which is not equal to the distance from the vertex to a focal point of the lens. As a result, a lowcost optical transmission system can be provided in which the influence of mode dispersion is reduced.

摘要翻译： 在光传输系统中，透镜会聚从发光元件输出的光信号。 通过透镜的光信号进入多模光纤（MMF）。 透镜的顶点和MMF的输入平面距离一定。 该距离被设定为不等于从顶点到透镜焦点的距离的值。 结果，可以提供降低模式色散影响的低成本光传输系统。

公开(公告)号：US06636342B2

公开(公告)日：2003-10-21

申请号：US09764380

申请日：2001-01-19

申请人： Satoshi Furusawa ,  Susumu Morikura

发明人： Satoshi Furusawa ,  Susumu Morikura

IPC分类号： G02F202

CPC分类号： H04J14/02 ,  G02F1/37 ,  H04B10/506 ,  H04B10/572

摘要： A group of semiconductor laser diodes outputs fundamental-wave lights controlled so that each wavelength thereof is double the wavelength of a light for wavelength multiplexing transmission. The fundamental-wave lights are provided to a light receiver, and then to a group of wavelength conversion elements, wherein the fundamental-wave lights are converted into lights each having half the wavelength of each fundamental-wave light. The group of wavelength conversion elements outputs lights including the converted lights each having half the wavelength of each fundamental-wave light and the fundamental-wave lights. The outputted lights are passed through a group of fundamental-wave optical eliminators typified by an optical filter for passing the converted lights and eliminating the fundamental-wave lights, a guiding part, and then an optical multiplexer, and then guided to a transmission medium. Thus, the light controlled in wavelength with high accuracy can be outputted without controlling the semiconductor laser diodes in oscillation wavelength with high accuracy.

摘要翻译： 一组半导体激光二极管输出控制的基波光，使得其每个波长的波长为用于波长复用传输的光的波长的两倍。 将基波光提供给光接收器，然后提供给一组波长转换元件，其中基波光被转换成各自具有每个基波光的一半波长的光。 一组波长转换元件输出包括每个具有每个基波光的一半波长的转换光和基波光的光。 输出的光通过由滤光器代表的一组基波消光器，用于使转换的光通过，并消除基波光，引导部分，然后被引导到光复用器，然后被引导到传输介质。 因此，能够高精度地输出振荡波长的半导体激光二极管，能够高精度地控制波长的光。

公开(公告)号：US5430763A

公开(公告)日：1995-07-04

申请号：US979834

申请日：1992-11-23

申请人： Susumu Morikura ,  Hiroaki Nakata

发明人： Susumu Morikura ,  Hiroaki Nakata

IPC分类号： H03C3/09 ,  H03K7/06 ,  H03L7/083 ,  H04N7/00 ,  H04K1/02 ,  H04L25/03 ,  H04L25/49

CPC分类号： H03C3/0975 ,  H03C3/0941 ,  H03C3/095 ,  H03K7/06 ,  H03L7/083 ,  H04N7/00

摘要： The present invention discloses a frequency stabilizing circuit used for a modulator that modulates an image signal including a synchronous signal into a pulse modulation signal. The frequency stabilizing circuit comprises a detecting device for detecting the synchronous signal included in the image signal that has not been modulated to output a pulse based on the detection, a pulse generating device for outputting a pulse by extracting a modulated signal outputted from the pulse modulator corresponding to the synchronous signal, and a feedback controlling device for increasing and/or decreasing a level of the image signal to be inputted to the pulse modulator in accordance with the difference between the pulse width of the pulse signal outputted from the detecting device and that of the pulse signal outputted from the pulse generating device.

摘要翻译： 本发明公开了一种用于调制器的频率稳定电路，其将包括同步信号的图像信号调制成脉冲调制信号。 频率稳定电路包括：检测装置，用于检测包括在未被调制的图像信号中的同步信号，以便基于检测输出脉冲;脉冲发生装置，用于通过提取从脉冲调制器输出的调制信号来输出脉冲 对应于同步信号的反馈控制装置，以及反馈控制装置，用于根据从检测装置输出的脉冲信号的脉冲宽度与从检测装置输出的脉冲信号的脉冲宽度之间的差异，增加和/或降低输入到脉冲调制器的图像信号的电平; 从脉冲发生装置输出的脉冲信号。

公开(公告)号：US07187740B2

公开(公告)日：2007-03-06

申请号：US10648260

申请日：2003-08-27

申请人： Keisuke Kinoshita ,  Toshiyuki Kohri ,  Susumu Morikura

发明人： Keisuke Kinoshita ,  Toshiyuki Kohri ,  Susumu Morikura

IPC分类号： H04L25/08

CPC分类号： H04L1/22 ,  H04J3/0641 ,  H04L7/0083

摘要： A communication system is provided in which normal communications can be ensured even upon a loss of synchronization on a part of transmission paths configuring a network.The system is to perform data communications within a network configured by a plurality of devices. A synchronization detecting section detects a loss of synchronization for data transmission between devices connected to each other via the network. Upon detection by the synchronization detecting section of the loss of synchronization, a control information retaining section and a switching section included in the first device cause a connection with the second device to be cut off, and then again cause a connection with the device. Upon connection caused by the switching section between the devices, a connection processing section 16 performs a connecting process for enabling data communications between these devices.

摘要翻译： 提供了一种通信系统，其中即使在配置网络的传输路径的一部分上的同步丢失也可以确保正常通信。 该系统是在由多个设备配置的网络内执行数据通信。 同步检测部检测经由网络彼此连接的设备之间的数据传输的同步丢失。 在由同步检测部检测到失去同步的情况下，包括在第一装置中的控制信息保持部分和切换部分导致与第二装置的连接被切断，然后再次引起与装置的连接。 在由设备之间的切换部分引起的连接时，连接处理部分16执行用于在这些设备之间进行数据通信的连接处理。

公开(公告)号：US07400836B2

公开(公告)日：2008-07-15

申请号：US11037202

申请日：2005-01-19

申请人： Keisuke Kinoshita ,  Susumu Morikura

发明人： Keisuke Kinoshita ,  Susumu Morikura

IPC分类号： H04B10/06 ,  H04B1/10

CPC分类号： H04B10/6931

摘要： An optical receiving device capable of outputting a control signal and a data signal received as an optical signal, even if a received optical power of an optical signal inputted via an optical fiber fluctuates. An optical-to-electrical conversion section converts the optical signal inputted via the optical fiber to an electrical signal. A received optical power detection section detects a received optical power of the optical signal. A detection level setting section outputs a first detection level value or a second detection level value as a detection level. A comparison section compares the received optical power with the detection level. An output/stop switching section outputs an electrical signal as an output signal when the received optical power is greater than the detection level, and stops outputting the signal when the received optical power Pt is smaller than the detection level Lt.

摘要翻译： 即使经由光纤输入的光信号的接收光功率波动，也能够输出作为光信号接收的控制信号和数据信号的光接收装置。 光电转换部将经由光纤输入的光信号转换为电信号。 接收光功率检测部分检测光信号的接收光功率。 检测电平设定部输出第一检测电平值或第二检测电平值作为检测电平。 比较部分将接收的光功率与检测电平进行比较。 当接收的光功率大于检测电平时，输出/停止切换部分输出作为输出信号的电信号，并且当接收的光功率Pt小于检测电平Lt时，停止输出信号。

公开(公告)号：US07058300B2

公开(公告)日：2006-06-06

申请号：US10125392

申请日：2002-04-19

申请人： Keisuke Kinoshita ,  Satoshi Furusawa ,  Masaru Fuse ,  Susumu Morikura

发明人： Keisuke Kinoshita ,  Satoshi Furusawa ,  Masaru Fuse ,  Susumu Morikura

IPC分类号： H04B10/08 ,  H04B17/00 ,  H04L12/28 ,  H04L12/56

CPC分类号： H04B10/0775 ,  H04B2210/075

摘要： A transmitting-end device generates a pilot signal with a pilot signal generation section, and transmits a pilot signal to a receiving-end device. At the receiving-end device, a transmission rate modification section detects the transmission band of an optical transmission line based on the amplitude of the pilot signal, and decides a data transmission rate acceptable to the receiving-end device by taking into account the transmission band of the optical transmission line. Based on a maximum data transmission data acceptable to the transmitting-end device and the data transmission rate thus decided, a control section in the receiving-end device arbitrates a data transmission rate between it and the transmitting-end device.

摘要翻译： 发送终端装置利用导频信号生成部生成导频信号，并将导频信号发送到接收端装置。 在接收端设备，传输速率修改部分基于导频信号的幅度来检测光传输线的传输频带，并且通过考虑传输频带来确定接收端设备可接受的数据传输速率 的光传输线。 基于发送端设备可接受的最大数据传输数据和如此决定的数据传输速率，接收端设备中的控制部分仲裁其与发送端设备之间的数据传输速率。

公开(公告)号：US4945403A

公开(公告)日：1990-07-31

申请号：US289825

申请日：1988-12-27

申请人： Kiyoshi Kubo ,  Noboru Okamura ,  Susumu Morikura

发明人： Kiyoshi Kubo ,  Noboru Okamura ,  Susumu Morikura

IPC分类号： F02B75/02 ,  H04N7/045 ,  H04N7/22 ,  H04N11/04

CPC分类号： H04N7/22 ,  H04N7/045 ,  F02B2075/025

摘要： A luminance signal in a component video signal is pulse frequency modulated, and the pulse frequency modulated signal is sequentially pulse width modulated by two color difference signals alternately. Thus, the component video signal is transmitted as one pulse train signal efficiently without extending the transmission band widely. A sound signal and a data signal can also be transmitted as digital signal in the one pulse train signal. The luminance signal and two color difference signals may also be inverted line-by-line prior to being modulated.

摘要翻译： 分量视频信号中的亮度信号（Y）被脉冲频率调制，并且脉冲频率调制信号被两个色差信号（Pr，Pb）交替地顺序地进行脉宽调制。 因此，分量视频信号作为一个脉冲串信号被有效传输，而不会广泛地扩展传输频带。