公开(公告)号：US20070109939A1

公开(公告)日：2007-05-17

申请号：US11592482

申请日：2006-11-03

申请人： Toshiki Shimizu ,  Jumpei Kura ,  Mariko Fukuyama

发明人： Toshiki Shimizu ,  Jumpei Kura ,  Mariko Fukuyama

IPC分类号： G11B20/10

CPC分类号： G11B20/1816 ,  G11B20/10009 ,  G11B2020/1863 ,  H03M13/3738 ,  H03M13/41 ,  H03M13/6331 ,  H03M13/6343

摘要： An evaluation value calculating apparatus includes the following elements. A difference metric selecting unit selects a difference metric for a specific recorded sequence in recorded sequences obtained in a maximum likelihood decoding process when information expressed with marks and spaces on a recording medium is played back, the difference metric being obtained in the maximum likelihood decoding process. A difference metric error value calculating unit determines a difference metric error value for the selected difference metric using a calculation method that is selected according to an edge shift direction of each of the marks on a time axis, the difference metric error value representing an error from an ideal difference metric and the edge shift direction on the time axis. A statistical processing unit performs statistical processing on the determined difference metric error value on the basis of each of states of path meeting points to generate an evaluation value.

摘要翻译： 评价值计算装置包括以下要素。 当在最大似然解码处理中获得的信息被记录在记录介质上的标记和空格的信息被重放时，差分度量选择单元选择在特定记录序列中的差值度量，在最大似然解码处理中获得的差分度量 。 差分度量误差值计算单元使用根据时间轴上的每个标记的边沿移位方向选择的计算方法来确定所选差分度量的差分度量误差值，差值度量误差值表示来自 理想差值度量和时间轴上的边沿移位方向。 统计处理单元基于路径会合点的状态的每一个对所确定的差分度量误差值执行统计处理，以生成评估值。

公开(公告)号：US07835245B2

公开(公告)日：2010-11-16

申请号：US11592482

申请日：2006-11-03

申请人： Toshiki Shimizu ,  Jumpei Kura ,  Mariko Fukuyama

发明人： Toshiki Shimizu ,  Jumpei Kura ,  Mariko Fukuyama

IPC分类号： G11B20/10

CPC分类号： G11B20/1816 ,  G11B20/10009 ,  G11B2020/1863 ,  H03M13/3738 ,  H03M13/41 ,  H03M13/6331 ,  H03M13/6343

摘要： An evaluation value calculating apparatus includes the following elements. A difference metric selecting unit selects a difference metric for a specific recorded sequence in recorded sequences obtained in a maximum likelihood decoding process when information expressed with marks and spaces on a recording medium is played back, the difference metric being obtained in the maximum likelihood decoding process. A difference metric error value calculating unit determines a difference metric error value for the selected difference metric using a calculation method that is selected according to an edge shift direction of each of the marks on a time axis, the difference metric error value representing an error from an ideal difference metric and the edge shift direction on the time axis. A statistical processing unit performs statistical processing on the determined difference metric error value on the basis of each of states of path meeting points to generate an evaluation value.

摘要翻译： 评价值计算装置包括以下要素。 当在最大似然解码处理中获得的信息被记录在记录介质上的标记和空格的信息被重放时，差分度量选择单元选择在特定记录序列中的差值度量，在最大似然解码处理中获得的差分度量 。 差分度量误差值计算单元使用根据时间轴上的每个标记的边沿移位方向选择的计算方法来确定所选差分度量的差分度量误差值，差值度量误差值表示来自 理想差值度量和时间轴上的边沿移位方向。 统计处理单元基于路径会合点的状态的每一个对所确定的差分度量误差值执行统计处理，以生成评估值。

公开(公告)号：US07916602B2

公开(公告)日：2011-03-29

申请号：US12637952

申请日：2009-12-15

申请人： Tatsuya Tamaki ,  Jumpei Kura

发明人： Tatsuya Tamaki ,  Jumpei Kura

IPC分类号： G11B7/0045

CPC分类号： G11B7/0062 ,  G11B7/1267

摘要： An optical recording and reproducing apparatus includes a recording-pulse-shift setting unit that shifts a front edge and a rear edge of a recording pulse and sets a write strategy of the recording pulse, an mark-edge-position evaluating unit that detects a front edge and a rear edge of a mark formed and detects a front mark edge position error and a rear mark edge position error, an assuming unit that assumes that the front mark edge position error is represented by a first linear function and assumes that the rear mark edge position error is represented by a second linear function, a sensitivity calculating unit that executes test recording and calculates sensitivities, and a write-strategy calculating unit that calculates a write strategy of the recording pulse on the basis of the sensitivities.

摘要翻译： 一种光学记录和再现装置包括记录脉冲移位设置单元，其移动记录脉冲的前边缘和后边缘并设置记录脉冲的写入策略;标记边缘位置评估单元，其检测前端 边缘和形成的标记的后边缘，并且检测前标记边缘位置误差和后标记边缘位置误差，假定前标记边缘位置误差由第一线性函数表示的假设单元，并且假定后标记 边缘位置误差由第二线性函数表示，灵敏度计算单元执行测试记录并计算灵敏度;以及写入策略计算单元，其根据灵敏度计算记录脉冲的写入策略。

公开(公告)号：US07813240B2

公开(公告)日：2010-10-12

申请号：US11565722

申请日：2006-12-01

申请人： Tadatsugu Morimoto ,  Takashi Fujimoto ,  Yoshie Hayashida ,  Rumi Fukuda ,  Jumpei Kura ,  Takeshi Yuwaki

发明人： Tadatsugu Morimoto ,  Takashi Fujimoto ,  Yoshie Hayashida ,  Rumi Fukuda ,  Jumpei Kura ,  Takeshi Yuwaki

IPC分类号： G11B5/00 ,  G11B7/12 ,  G11B15/52 ,  G11B7/00

CPC分类号： G11B7/1267

摘要： An optical disk recording apparatus having (1) an optical pickup that emits laser light to illuminate a recording surface of an optical disk, receives reflected light resulting from the laser light reflected off the recording surface, and generates a light reception signal based on the thus received reflected light; (2) a laser power controller that sets a laser power setting and controls the power of the laser light emitted from the optical pickup based on the thus set laser power setting; and (3) a signal generator that, when a plurality of trial write areas provided on the recording surface of the optical disk are successively illuminated with the laser light in order to write trial write data, generates a timing notification signal that sets laser arrival timing when the laser light sequentially reaches trial write start positions of the plurality of trial write areas based on the light reception signal generated by the optical pickup.

摘要翻译： 一种光盘记录装置，具有：（1）发出激光以照射光盘的记录面的光学拾取器，接收由从记录面反射的激光产生的反射光，并产生基于光的接收信号 收到反射光; （2）激光功率控制器，其基于由此设置的激光功率设定来设置激光功率设定并控制从光学拾取器发射的激光的功率; 以及（3）信号发生器，当为了写入试写数据而使用激光连续照射设置在光盘的记录面上的多个试写区域的信号发生器，生成设定激光到达时刻的定时通知信号 当激光基于由光学拾取器生成的光接收信号而顺序地到达多个试写区的试写开始位置时。

公开(公告)号：US10230938B2

公开(公告)日：2019-03-12

申请号：US14002237

申请日：2012-03-02

申请人： Jumpei Kura

发明人： Jumpei Kura

IPC分类号： H04N13/189 ,  H04N13/344 ,  G02B27/01 ,  H04N13/04 ,  H04N21/41 ,  H04N21/4363 ,  G09G5/00 ,  G09G5/12 ,  H04N5/775 ,  G09G3/00 ,  H04N13/30

摘要： A reproduction signal output from a reproduction device is output via a relay device to two or more display devices including an excellent display device that is used by being mounted on the head of a user.A connection monitoring circuit in a front end box 40 monitors both a +5V signal of a source appliance that is HDMI-connected to an HDMI input unit 501, and an HPD signal of a sink appliance that is HDMI-connected to a second output unit 503. Then, only when an HPD signal emitted by the HDMI sink appliance is detected together with a +5V signal emitted by the HDIM source appliance does the connection monitoring circuit in the front end box 40 enables a repeater function with respect to the HDMI sink appliance.

公开(公告)号：US20070127341A1

公开(公告)日：2007-06-07

申请号：US11561717

申请日：2006-11-20

申请人： Seiichi Sagara ,  Jumpei Kura ,  Naoyuki Nishigata

发明人： Seiichi Sagara ,  Jumpei Kura ,  Naoyuki Nishigata

IPC分类号： G11B7/0045

CPC分类号： G11B7/00456

摘要： A recording and reproducing apparatus includes optical head means for writing and reading information expressed by a mark and a space on an optical recording medium by irradiating laser light to the optical recording medium, laser-drive pulse generating means for creating and supplying a laser-driven pulse in accordance with information to write to the optical head means and causing the optical head means to perform the irradiation of laser light for writing, mark edge error detecting means for detecting an error of the edge position of the mark from a signal read out from the optical recording medium by the optical head means; and adjustment control means for defining the adjustment on a laser-driven pulse generated by the laser-driven pulse generating means.

摘要翻译： 记录和再现装置包括：光头装置，用于通过向光学记录介质照射激光来在光学记录介质上写入和读取由标记和空间表示的信息;激光驱动脉冲发生装置，用于创建和提供激光驱动 根据写入光头装置的信息脉冲，并使光头装置执行用于写入的激光的照射;标记边缘误差检测装置，用于从读出的信号中检测出标记的边缘位置的误差 该光学记录介质由光学头装置构成; 以及用于定义由激光驱动脉冲发生装置产生的激光驱动脉冲的调整的调节控制装置。

公开(公告)号：US6100724A

公开(公告)日：2000-08-08

申请号：US37333

申请日：1998-03-10

申请人： Shunji Yoshimura ,  Jumpei Kura

发明人： Shunji Yoshimura ,  Jumpei Kura

IPC分类号： G11B20/10 ,  G11B7/005 ,  G11B20/14 ,  H03L7/08 ,  H03L7/085 ,  G11B7/00 ,  H03L7/06

CPC分类号： H03L7/0805 ,  G11B20/1403 ,  H03L7/0807 ,  H03L7/085 ,  G11B7/005

摘要： A digital signal reproducing circuit which enables precise measurement of a phase difference and jitter components of reproduction signals while realizing miniaturization of the circuit is disclosed. The digital signal reproducing circuit has a phase comparator for detecting a phase difference by using sampled values before and after an edge portion of a reproduction signal from an optical disc outputted from an A/D converter, and a jitter measuring section for detecting a jitter detection signal on the basis of unevenness of the phase difference obtained by the phase comparator.

摘要翻译： 公开了一种数字信号再现电路，其能够精确地测量再现信号的相位差和抖动分量，同时实现电路的小型化。 数字信号再现电路具有相位比较器，用于通过使用从A / D转换器输出的光盘的再现信号的边缘部分之前和之后的采样值和用于检测抖动检测的抖动测量部分来检测相位差 基于由相位比较器获得的相位差的不均匀的信号。

公开(公告)号：US20070206475A1

公开(公告)日：2007-09-06

申请号：US11705302

申请日：2007-02-12

申请人： Tatsuya Tamaki ,  Jumpei Kura

发明人： Tatsuya Tamaki ,  Jumpei Kura

IPC分类号： G11B7/0045

CPC分类号： G11B7/0062 ,  G11B7/1267

摘要： An optical recording and reproducing apparatus includes a recording-pulse-shift setting unit that shifts a front edge and a rear edge of a recording pulse and sets a write strategy of the recording pulse, an mark-edge-position evaluating unit that detects a front edge and a rear edge of a mark formed and detects a front mark edge position error and a rear mark edge position error, an assuming unit that assumes that the front mark edge position error is represented by a first linear function and assumes that the rear mark edge position error is represented by a second linear function, a sensitivity calculating unit that executes test recording and calculates sensitivities, and a write-strategy calculating unit that calculates a write strategy of the recording pulse on the basis of the sensitivities.

摘要翻译： 一种光学记录和再现装置包括记录脉冲移位设置单元，其移动记录脉冲的前边缘和后边缘并设置记录脉冲的写入策略;标记边缘位置评估单元，其检测前端 边缘和形成的标记的后边缘，并且检测前标记边缘位置误差和后标记边缘位置误差，假定前标记边缘位置误差由第一线性函数表示的假设单元，并且假定后标记 边缘位置误差由第二线性函数表示，灵敏度计算单元执行测试记录并计算灵敏度;以及写入策略计算单元，其根据灵敏度计算记录脉冲的写入策略。

公开(公告)号：US6052350A

公开(公告)日：2000-04-18

申请号：US958010

申请日：1997-10-27

申请人： Jumpei Kura

发明人： Jumpei Kura

IPC分类号： G11B20/10 ,  G11B20/14 ,  G11B7/00

CPC分类号： G11B20/10314 ,  G11B20/10009 ,  G11B20/10037 ,  G11B20/10046 ,  G11B20/10222 ,  G11B20/1403

摘要： The present invention provides a digital signal reproduction circuit capable of controlling a transfer function of waveform equalization circuit so that a synchronous clock can be generated with an optimal transfer characteristic. The digital signal reproduction circuit 1 includes: a waveform equalization block for waveform-equalizing a regenerative signal; a binarization block 20 for binarizing the regenerative signal which has been waveform-equalized; a synchronous clock reproduction block 30 for generating a synchronous clock from the signal binarized; and a waveform equalization control block 40 for controlling a transfer function of the waveform equalization block 10 according to a jitter component between the synchronous clock and the binarized signal. The waveform equalization control block 40 is supplied with a phase difference signal between the binarized signal and the synchronous signal, so as to obtain an optimal value of the transfer function of the waveform equalization block 10 by using a microcomputer, for example. The transfer function is controlled so as to reduce the jitter component of the synchronous clock.

摘要翻译： 本发明提供一种能够控制波形均衡电路的传递函数的数字信号再现电路，从而能够以最佳传输特性产生同步时钟。 数字信号再现电路1包括：波形均衡块，用于对再生信号进行波形均衡; 二进制块20，用于二值化已经被波形均衡的再生信号; 同步时钟再现块30，用于从二进制化的信号产生同步时钟; 以及用于根据同步时钟和二值化信号之间的抖动分量来控制波形均衡块10的传递函数的波形均衡控制块40。 波形均衡控制块40在二值化信号和同步信号之间被提供相位差信号，以便通过使用微计算机来获得波形均衡块10的传递函数的最佳值。 控制传递函数以减少同步时钟的抖动分量。

公开(公告)号：US20130335536A1

公开(公告)日：2013-12-19

申请号：US14002239

申请日：2012-03-02

申请人： Jumpei Kura ,  Takeo Mitsui ,  Masayuki Sakaguchi

发明人： Jumpei Kura ,  Takeo Mitsui ,  Masayuki Sakaguchi

IPC分类号： H04N13/04

CPC分类号： H04N13/344 ,  G02B27/0176 ,  H04N2213/001 ,  H04N2213/008

摘要： A head mount display used in a state worn on the head of a user is provided.In a worn state, a forehead support 102 comes in contact with the forehead of the user, and an upper band 104 and a lower band 105 of the headband come in contact with the back of the head. That is, the head mount display is worn on the head of the user with a three-point support by the forehead support 102, the upper band 104, and the lower band 105. Thus, unlike a structure similar to glasses whose weight is mainly supported by a nose piece, the head mount display can be worn while easing the strain on the user by distributing the load of the device over the entire head.

摘要翻译： 提供了用于佩戴在用户头部的状态的头戴式显示器。 在磨损状态下，前额支撑件102与使用者的前额接触，并且头带的上带104和下带105与头部的后部接触。 也就是说，头戴显示器被佩戴在使用者的头部上，由前额支撑件102，上带104和下带105组成三点支撑。因此，不像重量为主的眼镜类似的结构 由鼻部支撑，通过将装置的负载分布在整个头部上，头戴式显示器可以在减轻使用者的疲劳的同时被佩戴。