公开(公告)号：US06999388B2

公开(公告)日：2006-02-14

申请号：US10131974

申请日：2002-04-24

申请人： Akira Mashimo ,  Chisato Takayama ,  Keishi Ueno

发明人： Akira Mashimo ,  Chisato Takayama ,  Keishi Ueno

IPC分类号： G11B7/00

CPC分类号： G11B7/0945 ,  G11B7/094

摘要： An optical disk apparatus capable of adjusting a focus servo and the like by precisely detecting a jitter amount. Light reflected from an optical disk is converted into an RF signal in an optical pickup and amplified by an RF amplifier before being supplied to an equalizer. The boost amount of the equalizer is set to zero during adjustment and set to a predetermined finite value (e.g., +20 dB) during normal recording and reproducing. By first setting the boost amount to zero, the delay characteristics of the RF signal from 3T to 11T are flattened such that an accurate jitter amount can be determined based on the integrated value of the phase differences of 3T to 11T, thereby allowing the optical pickup to be adjusted so as to minimize the jitter amount.

公开(公告)号：US07212486B2

公开(公告)日：2007-05-01

申请号：US10283802

申请日：2002-10-29

申请人： Akira Mashimo ,  Keishi Ueno

发明人： Akira Mashimo ,  Keishi Ueno

IPC分类号： G11B7/00

CPC分类号： G11B7/0053 ,  G11B7/00745 ,  G11B7/24082

摘要： In this optical disk device, a reflected light of a light beam reflected from a pre-pit-formed side of a track wobbled on a disk is detected as a first detection signal. A reflected light of the light beam reflected from the other side of the track is detected as a second detection signal. The first detection signal and/or the second detection signal are/is amplified with a gain(s) so set that a peak value of a wobble signal component of the first detection signal coincides with a bottom value of a wobble signal component of the second detection signal.

摘要翻译： 在该光盘装置中，检测从摆动在盘上的轨道的预制坑形成侧反射的光束的反射光作为第一检测信号。 从轨道的另一侧反射的光束的反射光被检测为第二检测信号。 第一检测信号和/或第二检测信号被放大，使得第一检测信号的摆动信号分量的峰值与第二检测信号的摆动信号分量的底值一致， 检测信号。

公开(公告)号：US06807135B1

公开(公告)日：2004-10-19

申请号：US09659089

申请日：2000-09-11

申请人： Akira Mashimo ,  Keishi Ueno

发明人： Akira Mashimo ,  Keishi Ueno

IPC分类号： G11B700

CPC分类号： G11B7/0956 ,  G11B7/00736 ,  G11B7/0938 ,  G11B7/0945 ,  G11B7/24085

摘要： A tilt detection system includes an optical disk having a series of data recorded therein, the series of data having a pulse width smaller than the minimum pulse width of data recorded in an ordinary optical disk; a reproducing part reproducing a signal from the optical disk by emitting a light beam onto the optical disk; and a tilt detecting part detecting a tilt of the light beam with respect to the optical disk based on a reproduced RF signal provided by the reproducing part when the series of data having the smaller pulse width is reproduced.

摘要翻译： 倾斜检测系统包括具有记录在其中的一系列数据的光盘，所述一系列数据具有小于记录在普通光盘中的数据的最小脉冲宽度的脉冲宽度; 再现部分通过将光束发射到光盘上来再现来自光盘的信号; 以及当再现具有较小脉冲宽度的一系列数据时，基于由再现部分提供的再现RF信号来检测光束相对于光盘的倾斜的倾斜检测部分。

公开(公告)号：US06876707B2

公开(公告)日：2005-04-05

申请号：US09740666

申请日：2000-12-19

申请人： Akira Mashimo ,  Keishi Ueno

发明人： Akira Mashimo ,  Keishi Ueno

IPC分类号： G06F1/06 ,  G11B20/14 ,  H03D3/00 ,  H03D3/04 ,  H04L25/34

CPC分类号： H03D3/04

摘要： A signal processing circuit generating a digital signal based on an input pulse signal is provided, which circuit includes a clock pulse output circuit which outputs clock pulses having one of positive and negative polarities for a period which includes a pulse of the input pulse signal, a counter circuit which counts the clock pulses, and an output circuit which outputs the digital signal based on a counted value of the counter circuit.

摘要翻译： 提供了基于输入脉冲信号产生数字信号的信号处理电路，该电路包括时钟脉冲输出电路，时钟脉冲输出电路在包括输入脉冲信号的脉冲的周期内输出具有正极性和负极性之一的时钟脉冲， 计数时钟脉冲的计数器电路，以及基于计数器电路的计数值输出数字信号的输出电路。

公开(公告)号：US07697405B2

公开(公告)日：2010-04-13

申请号：US11259852

申请日：2005-10-26

申请人： Akira Mashimo ,  Keishi Ueno

发明人： Akira Mashimo ,  Keishi Ueno

IPC分类号： G11B7/24

CPC分类号： G11B7/0053

摘要： An inspection apparatus for inspecting a phase modulated wobble track of an optical disk is provided. A radial push-pull signal (a wobble signal) of an optical disk is supplied to a low pass filter where a phase boundary portion of the wobble signal is smoothed, and then binarized by a binarizer and supplied to a time interval analyzer. The time interval analyzer analyzes a period of the binary wobble signal to extract two peak values T1 and T2 thereof. An operation device computes a difference value of the two periods T1 and T2 and a standard deviation of each peak, and compares each computed value to a threshold value for simultaneously evaluating CNR and a phase shift. The low pass filter and the binarizer may be incorporated into an optical disk apparatus for smoothing the phase boundary portion of the reproduced wobble signal.

摘要翻译： 提供一种用于检查光盘的相位调制摆动轨迹的检查装置。 将光盘的径向推挽信号（摆动信号）提供给低通滤波器，其中摆动信号的相位边界部分被平滑化，然后由二值化器二值化并提供给时间间隔分析器。 时间间隔分析器分析二进制摆动信号的周期以提取其两个峰值T1和T2。 操作装置计算两个周期T1和T2的差值和每个峰值的标准偏差，并将每个计算值与用于同时评估CNR和相移的阈值进行比较。 低通滤波器和二值化器可以并入到用于平滑再现的摆动信号的相位边界部分的光盘装置中。

公开(公告)号：US20060092791A1

公开(公告)日：2006-05-04

申请号：US11259852

申请日：2005-10-26

申请人： Akira Mashimo ,  Keishi Ueno

发明人： Akira Mashimo ,  Keishi Ueno

IPC分类号： G11B19/28 ,  G11B5/09

CPC分类号： G11B7/0053

摘要： An inspection apparatus for inspecting a phase modulated wobble track of an optical disk is provided. A radial push-pull signal (a wobble signal) of an optical disk is supplied to a low pass filter where a phase boundary portion of the wobble signal is smoothed, and then binarized by a binarizer and supplied to a time interval analyzer. The time interval analyzer analyzes a period of the binary wobble signal to extract two peak values T1 and T2 thereof. An operation device computes a difference value of the two periods T1 and T2 and a standard deviation of each peak, and compares each computed value to a threshold value for simultaneously evaluating CNR and a phase shift. The low pass filter and the binarizer may be incorporated into an optical disk apparatus for smoothing the phase boundary portion of the reproduced wobble signal.

摘要翻译： 提供一种用于检查光盘的相位调制摆动轨迹的检查装置。 将光盘的径向推挽信号（摆动信号）提供给低通滤波器，其中摆动信号的相位边界部分被平滑化，然后由二值化器二值化并提供给时间间隔分析器。 时间间隔分析器分析二进制摆动信号的周期以提取其两个峰值T 1和T 2。 操作装置计算两个周期T 1和T 2的差值以及每个峰值的标准偏差，并将每个计算值与用于同时评估CNR和相移的阈值进行比较。 低通滤波器和二值化器可以并入到用于平滑再现的摆动信号的相位边界部分的光盘装置中。

公开(公告)号：US06992962B1

公开(公告)日：2006-01-31

申请号：US09663956

申请日：2000-09-19

申请人： Akira Mashimo ,  Keishi Ueno

发明人： Akira Mashimo ,  Keishi Ueno

IPC分类号： G11B20/18

CPC分类号： G11B7/131 ,  G11B7/0053 ,  G11B7/0943

摘要： A wobble signal detection circuit is provided for an optical disk apparatus which detects a wobble signal by focusing a light beam into a spot on a pregroove on an optical disk during recording of data onto and reproduction of data from the optical disk, and includes a photodetector which detects first and second lights from first and second portions of the spot, respectively, and outputs first and second detection signals corresponding to respective power levels of the first and second detection lights. The wobble signal detection circuit includes: a sample-and-hold circuit sampling and holding the first and second detection signals output from said photodetector during the recording of the data onto the optical disk; lowpass filter means for reducing noise components of the respective first and second detection signals; and subtraction means for calculating a difference between the first and second detection signals respectively output from said lowpass filter means so as to obtain the wobble signal.

摘要翻译： 提供了一种用于光盘装置的摆动信号检测电路，该光盘装置通过在从光盘记录数据和从光盘再现数据的同时将光束聚焦到光盘上的预制槽上的光点中来检测摆动信号，并且包括光电检测器 其分别从点的第一和第二部分检测第一和第二光，并且输出对应于第一和第二检测光的各个功率电平的第一和第二检测信号。 摆动信号检测电路包括：取样保持电路，在将数据记录到光盘上时，对从所述光电检测器输出的第一和第二检测信号进行采样和保持; 低通滤波器装置，用于减少相应的第一和第二检测信号的噪声分量; 以及减法装置，用于计算分别从所述低通滤波器装置输出的第一和第二检测信号之间的差，以获得摆动信号。

公开(公告)号：US6031796A

公开(公告)日：2000-02-29

申请号：US21689

申请日：1998-02-10

申请人： Misao Fukuda ,  Takayuki Masuda ,  Keishi Ueno ,  Akira Mashimo

发明人： Misao Fukuda ,  Takayuki Masuda ,  Keishi Ueno ,  Akira Mashimo

IPC分类号： G11B7/0037 ,  G11B7/007 ,  G11B20/10 ,  G11B20/12 ,  G11B20/14 ,  G11B27/30 ,  G11B7/00

CPC分类号： G11B7/0037 ,  G11B20/10 ,  G11B27/3027 ,  G11B20/1217 ,  G11B2020/1476 ,  G11B2220/20 ,  G11B2220/2545 ,  G11B7/00745

摘要： An optical disk apparatus for performing recording and reproduction of information on an optical disk is disclosed. The optical disk has a sector format which consists of a sector mark area in which a sector mark is recorded and an address area in which a plurality of VFO segments and ID segments are alternately provided. The apparatus comprises a sector mark detector, a read gate controller, a PLL controller and an address information detector. The sector mark detector detects the sector mark. The read gate controller controls a read gate to be opened and closed. The read gate enables readout of information from the VFO segment when it is opened. The PLL controller initiates synchronization of a signal read from the VFO segment with a PLL in response to the opening of the read gate. The address information detector detects an address identifier recorded in the ID segment. If the address information detector cannot detect the address identifier, the read gate controller closes the read gate and opens the read gate at a timing corresponding to the VFO segment located immediately after the ID segment in which the address identifier cannot be detected.

摘要翻译： 公开了一种用于在光盘上执行信息的记录和再现的光盘装置。 光盘具有由记录有扇区标记的扇区标记区域和交替设置多个VFO段和ID段的地址区域构成的扇区格式。 该装置包括扇区标记检测器，读门控制器，PLL控制器和地址信息检测器。 扇区标记检测器检测扇区标记。 读门控制器控制读门被打开和关闭。 读门可以在VFO段打开时读取信息。 响应于读门的打开，PLL控制器启动从VFO段读取的信号与PLL的同步。 地址信息检测器检测记录在ID段中的地址标识符。 如果地址信息检测器不能检测到地址标识符，则读门控制器关闭读门，并在与不能检测到地址标识符的ID段紧邻的VFO段对应的定时打开读门。

公开(公告)号：US5914927A

公开(公告)日：1999-06-22

申请号：US21112

申请日：1998-02-10

申请人： Misao Fukuda ,  Hiroyuki Hishiyama ,  Keishi Ueno ,  Akira Mashimo

发明人： Misao Fukuda ,  Hiroyuki Hishiyama ,  Keishi Ueno ,  Akira Mashimo

IPC分类号： G11B7/00 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/125 ,  G11B20/10 ,  G11B20/18

CPC分类号： G11B7/126 ,  G11B20/10 ,  G11B20/1816 ,  G11B7/005

摘要： An optical disk apparatus having an optical head for reading and writing signals on an optical disk and a signal processing unit for performing predetermined signal processing on the signals is disclosed. The apparatus includes a first controller, a second controller, a detector, and an adjuster. The first controller controls the optical head to write a predetermined signal on a predetermined area of the optical disk with various levels of recording power of the optical head. The second controller reproduces the predetermined signal written on the predetermined area of the optical disk. The detector attempts to detect a predetermined signal pattern having a predetermined period from the reproduced signal with different slice levels. The adjuster determines a resolution of the reproduced signal in accordance with a slice level with which the signal pattern can be detected and automatically adjusts the recording power of the optical head based on the determined resolution.

摘要翻译： 公开了一种具有用于在光盘上读取和写入信号的光学头的光盘装置和用于对信号进行预定信号处理的信号处理单元。 该装置包括第一控制器，第二控制器，检测器和调节器。 第一控制器控制光头以光学头的各种级别的记录功率在光盘的预定区域上写入预定信号。 第二控制器再现写在光盘的预定区域上的预定信号。 检测器尝试从具有不同切片电平的再现信号检测具有预定周期的预定信号图案。 调节器根据可以检测信号图案的限幅电平来确定再现信号的分辨率，并且基于所确定的分辨率自动调节光头的记录功率。

公开(公告)号：US07436746B2

公开(公告)日：2008-10-14

申请号：US10924445

申请日：2004-08-24

申请人： Akira Mashimo ,  Keishi Ueno

发明人： Akira Mashimo ,  Keishi Ueno

IPC分类号： G11B7/00

CPC分类号： G11B7/0956 ,  G11B7/00736 ,  G11B7/0938 ,  G11B7/0945 ,  G11B7/24085

摘要： A tilt detection system includes an optical disk having a series of data recorded therein, the series of data having a pulse width smaller than the minimum pulse width of data recorded in an ordinary optical disk; a reproducing part reproducing a signal from the optical disk by emitting a light beam onto the optical disk; and a tilt detecting part detecting a tilt of the light beam with respect to the optical disk based on a reproduced RF signal provided by the reproducing part when the series of data having the smaller pulse width is reproduced.

摘要翻译： 倾斜检测系统包括具有记录在其中的一系列数据的光盘，所述一系列数据具有小于记录在普通光盘中的数据的最小脉冲宽度的脉冲宽度; 再现部分通过将光束发射到光盘上来再现来自光盘的信号; 以及当再现具有较小脉冲宽度的一系列数据时，基于由再现部分提供的再现RF信号来检测光束相对于光盘的倾斜的倾斜检测部分。