公开(公告)号：US20060077828A1

公开(公告)日：2006-04-13

申请号：US11234212

申请日：2005-09-26

Applicant: Youichi Ogura ,  Toshihiko Takahashi ,  Teruhiko Izumi ,  Shinichi Konishi ,  Hironori Deguchi ,  Takamasa Sakai

Inventor： Youichi Ogura ,  Toshihiko Takahashi ,  Teruhiko Izumi ,  Shinichi Konishi ,  Hironori Deguchi ,  Takamasa Sakai

IPC: G11B20/10

CPC classification number: G11B20/10009 ,  G11B7/131 ,  G11B20/1403 ,  G11B2020/122 ,  G11B2020/1239 ,  G11B2020/1268

Abstract: An optical disk device is provided with a first analog-to-digital converter for converting a push-pull signal detected from an optical disc medium into a digital sampling signal according to a sampling clock in the vicinity of a channel frequency, an address polarity information detection circuit for detecting address polarity information from the digital sampling signal, and an address position information detection circuit 58 for detecting address position information from the digital sapling signal while maintaining continuity. Therefore, it is possible to detect the address polarity information and the address position information stably and accurately even during high-speed recording/playback.

Abstract translation: 光盘装置具有第一模数转换器，用于根据通道频率附近的采样时钟将从光盘介质检测到的推挽信号转换为数字采样信号，地址极性信息 用于从数字采样信号检测地址极性信息的检测电路，以及用于在保持连续性的同时从数字树苗信号中检测地址位置信息的地址位置信息检测电路58。 因此，即使在高速记录/重放期间，也可以稳定且精确地检测地址极性信息和地址位置信息。

公开(公告)号：US06963528B2

公开(公告)日：2005-11-08

申请号：US10201939

申请日：2002-07-25

Applicant: Youichi Ogura

Inventor： Youichi Ogura

IPC: G11B20/14 ,  G11B20/10 ,  H04B3/06 ,  G11B5/09

CPC classification number: G11B20/10203 ,  G11B20/10009 ,  G11B20/10055 ,  G11B20/10111

Abstract: In a digital data reproduction apparatus for demodulating digital data from an optical recording medium, PRML (Partial Response Maximum Likelihood) signal processing effective to high-density recording/reproduction is carried out by using a half rate processing offset control means which performs data demodulation using half of the channel bit frequency, a half rate processing phase sync control means, a half rate processing adaptive equalization means, and a half rate processing maximum likelihood decoder, and the digital data recorded on the optical recording medium are reproduced while restoring signal components which are missing in the time direction, by linear interpolation or Nyquist interpolation. Therefore, digital data reproduction performance is improved, and power consumption is reduced.

Abstract translation: 在用于从光学记录介质解调数字数据的数字数据再现装置中，通过使用半速率处理偏移控制装置执行对高密度记录/再现有效的PRML（部分响应最大似然）信号处理，该半速率处理偏移控制装置使用 信道位频率的一半，半速率处理相位同步控制装置，半速率处理自适应均衡装置和半速率处理最大似然解码器，并且记录在光记录介质上的数字数据被再现，同时恢复信号分量， 在时间方向上丢失，通过线性插值或奈奎斯特插值。 因此，数字数据再现性能得以提高，功耗降低。

公开(公告)号：US20050063276A1

公开(公告)日：2005-03-24

申请号：US10942949

申请日：2004-09-17

Applicant: Youichi Ogura

Inventor： Youichi Ogura

IPC: G11B20/10 ,  G11B5/09 ,  G11B7/00 ,  G11B7/005 ,  G11B20/14

CPC classification number: G11B20/10009 ,  G11B20/10055 ,  G11B20/10203 ,  G11B20/10296

Abstract: An optical disc device of the present invention obtains a reproduction quality that is independent of a mark distortion by receiving a signal that is obtained from an A/D converter for digitizing a reproduction signal of an optical disc medium and an offset correction means for performing offset correction, accurately measuring a mark distortion factor in a mark pattern having a long recording width by means of a mark distortion factor measuring means, and selecting one of output signals from a PRML signal processing means and a level judge binarization means by means of a digital data demodulation selection means by utilizing the measured mark distortion factor as a judgement criterion, to be used as a demodulation binary signal.

Abstract translation: 本发明的光盘装置通过接收从用于数字化光盘介质的再现信号的A / D转换器获得的信号和用于执行偏移的偏移校正装置来获得独立于标记失真的再现质量 校正，通过标记失真因子测量装置精确地测量具有长记录宽度的标记图案中的标记失真因子，并且通过数字的方式从PRML信号处理装置和电平判断二值化装置中选择一个输出信号 数据解调选择装置利用测量的标记失真因子作为判断标准，用作解调二进制信号。

公开(公告)号：US08004945B2

公开(公告)日：2011-08-23

申请号：US12282439

申请日：2007-03-13

Applicant: Harumitsu Miyashita ,  Kohei Nakata ,  Hiroshi Ueda ,  Youichi Ogura

Inventor： Harumitsu Miyashita ,  Kohei Nakata ,  Hiroshi Ueda ,  Youichi Ogura

IPC: G11B7/00

CPC classification number: G11B20/10009 ,  G11B7/0053 ,  G11B7/08523 ,  G11B2220/2537

Abstract: An information reproduction device according to the present invention is a device for accessing a recording medium having first address information and second address information recorded thereon. The first address information is represented by a shape formed on the recording medium in advance; and the second address information is recorded on the recording medium together with data. The information reproduction device includes a head section for accessing the recording medium to generate a reproduction signal; a first detection section for detecting the first address information from the reproduction signal; a second detection section for detecting the second address information from the reproduction signal; and a control section for, based on a detection result of either the first detection section or the second detection section which detected the address information first, controlling an access after the detection to the recording medium.

Abstract translation: 根据本发明的信息再现装置是用于访问其上记录有第一地址信息和第二地址信息的记录介质的装置。 第一地址信息由形成在记录介质上的形状预先表示; 并且第二地址信息与数据一起被记录在记录介质上。 信息再现装置包括用于访问记录介质以产生再现信号的头部分; 第一检测部分，用于从再现信号中检测第一地址信息; 第二检测部分，用于从再现信号中检测第二地址信息; 以及控制部分，用于基于首先检测到地址信息的第一检测部分或第二检测部分的检测结果，控制检测到记录介质之后的访问。

公开(公告)号：US20090103413A1

公开(公告)日：2009-04-23

申请号：US11917253

申请日：2006-07-20

Applicant: Seiji Matsui ,  Youichi Ogura

Inventor： Seiji Matsui ,  Youichi Ogura

IPC: G11B27/36 ,  G11B7/00

CPC classification number: G11B20/10009 ,  H04L25/03038

Abstract: A waveform equalization control device includes a waveform equalizer that has a filter provided with a plurality of taps, updates the tap coefficient of each of the plurality of taps in accordance with a tap coefficient signal inputted thereto, causes the plurality of taps to respectively receive a plurality of values sampled at different time points from an input signal, performs waveform equalization with respect to the input signal, and outputs the signal after the waveform equalization, an equalization target value generation unit for determining an equalization target value, an error estimation unit for obtaining the error between the equalization target value and the signal after the waveform equalization, and a coefficient update unit for determining an amount of updating the coefficient of each of the taps of the filter of the waveform equalizer based on the error signal and on the input value to each of the taps and outputting the amount of updating the tap coefficient as the tap coefficient signal. The equalization target value generation unit obtains sign signals each showing whether the signal after the waveform equalization has a positive value or a negative value for first to fifth time points and determines a value corresponding to a total sum which is a sum of respective results of multiplying the sign signals for the first to fifth time points by θ, β, α, β, and θ (where each of α, β, and θ is a predetermined real number) as the equalization target value.

Abstract translation: 波形均衡控制装置包括波形均衡器，其具有设置有多个抽头的滤波器，根据输入的抽头系数信号来更新多个抽头中的每一个的抽头系数，使多个抽头分别接收 在输入信号的不同时间点采样的多个值对输入信号进行波形均衡，输出波形均衡后的信号，确定均衡目标值的均衡目标值生成单元，用于确定均衡目标值的差分估计单元 获得均衡目标值和波形均衡后的信号之间的误差;以及系数更新单元，用于基于误差信号和输入来确定更新波形均衡器的滤波器的每个抽头的系数的量 值，并输出更新抽头系数的量 抽头系数信号。 均衡目标值生成单元获得各自表示波形均衡后的信号是否具有第一至第五时间的正值或负值的符号信号，并且确定对应于作为乘法的各个结果的和的总和的值 作为均衡目标值，通过θ，β，α，β和θ（其中α，β和θ各自是预定实数）的第一至第五时间点的符号信号。

公开(公告)号：US07327658B2

公开(公告)日：2008-02-05

申请号：US10722397

申请日：2003-11-28

Applicant: Hiroki Mouri ,  Kouji Okamoto ,  Youichi Ogura

Inventor： Hiroki Mouri ,  Kouji Okamoto ,  Youichi Ogura

IPC: G11B7/00

CPC classification number: G11B7/0053

Abstract: The present invention is made to improve the conventional analog processing that is easily affected by variations in semiconductor processing. This invention provides a wobble signal processing apparatus that can reduce the circuit scale and the power consumption as well as improve the quality of signal processing. The wobble signal processing apparatus of the present invention digitally processes a part that has conventionally been processed by an analog system, and a PRML circuit is further provided to implement error detection, whereby the circuit scale and the power consumption is reduced. This improves the detection of a signal that is inputted to the wobble signal processing apparatus.

Abstract translation: 本发明是为了改进容易受半导体处理变化影响的常规模拟处理。 本发明提供一种可以减小电路规模和功耗以及提高信号处理质量的摆动信号处理装置。 本发明的摆动信号处理装置对传统上由模拟系统处理的部分进行数字处理，并且进一步提供PRML电路以实现错误检测，由此降低了电路规模和功耗。 这改善了输入到摆动信号处理装置的信号的检测。

公开(公告)号：US07254100B2

公开(公告)日：2007-08-07

申请号：US11405590

申请日：2006-04-18

Applicant: Youichi Ogura

Inventor： Youichi Ogura

IPC: G11B20/10

CPC classification number: G11B20/10111 ,  G11B20/10 ,  G11B20/10009 ,  G11B20/10046 ,  G11B20/10055 ,  G11B20/10166 ,  G11B20/10212 ,  G11B20/10222 ,  G11B20/10296 ,  G11B20/10425 ,  G11B20/1403 ,  G11B20/1496 ,  G11B20/225 ,  H03H17/06

Abstract: A data demodulation process rate is varied according to a reproduction state, thereby reducing power consumption while maintaining a reading performance in a favorable state. A channel rate process data demodulation device performs a data demodulation process by employing channel bit frequency. Further, a half rate process data demodulation device performs a data demodulation process by employing frequency half as high as the channel bit frequency. These devices demodulate digital data from an optical recording medium. A process rate switching device switches a process rate at data demodulation, whereby demodulation is performed by switching between the data demodulation devices according to a quality of a reproduction signal, so as to reproduce the digital data recorded on the optical recording medium.

Abstract translation: 数据解调处理速率根据再现状态而变化，从而在保持读取性能的同时保持良好的状态，从而降低功耗。 信道速率处理数据解调装置通过采用信道比特频率进行数据解调处理。 此外，半速率处理数据解调装置通过使用频率一半与信道位频率一样高的数据解调处理。 这些设备从光学记录介质解调数字数据。 处理速率切换装置在数据解调时切换处理速率，由此通过根据再现信号的质量在数据解调装置之间切换来进行解调，以便再现记录在光学记录介质上的数字数据。

公开(公告)号：US20060109770A1

公开(公告)日：2006-05-25

申请号：US11269586

申请日：2005-11-09

Applicant: Youichi Ogura ,  Toshihiko Takahashi ,  Hiroaki Hayashi ,  Teruhiko Izumi ,  Dai Ichiryu ,  Shinichi Konishi

Inventor： Youichi Ogura ,  Toshihiko Takahashi ,  Hiroaki Hayashi ,  Teruhiko Izumi ,  Dai Ichiryu ,  Shinichi Konishi

IPC: G11B7/00

CPC classification number: G11B7/0053 ,  G11B7/00375 ,  G11B7/1263 ,  G11B7/24082 ,  G11B20/10009 ,  G11B20/1403 ,  G11B27/24 ,  G11B2220/2575

Abstract: An optical disc recording/playback apparatus is provided with a first AD converter 35 for shaping a push-pull signal 14 detected from an optical disc medium 1 by a light difference signal shaping circuit 21, and converting the signal into a digital sampling signal 38 using a sampling clock 37 synchronized with a channel frequency; a series of means for detecting wobble amplitude information 77 during recording from the digital sampling signal 38; a series of means for detecting address polarity information 60 and address position information during playback; and a recording laser power control circuit 113 for controlling a recording laser power to a power suited for recording on the basis of the wobble amplitude information.

Abstract translation: 光盘记录/重放装置设置有第一AD转换器35，用于通过光差信号整形电路21对从光盘介质1检测到的推挽信号14进行整形，并且将信号转换成数字采样信号38，使用 与信道频率同步的采样时钟37; 用于在从数字采样信号38记录期间检测摆动幅度信息77的一系列装置; 用于检测地址极性信息60和播放期间的地址位置信息的一系列装置; 以及记录激光功率控制电路113，用于根据摆动振幅信息将记录激光功率控制到适于记录的功率。

公开(公告)号：US06674707B2

公开(公告)日：2004-01-06

申请号：US09936513

申请日：2001-11-13

Applicant: Youichi Ogura ,  Koichi Urita ,  Shinichiro Sato ,  Yoshimasa Oda

Inventor： Youichi Ogura ,  Koichi Urita ,  Shinichiro Sato ,  Yoshimasa Oda

IPC: G11B700

CPC classification number: H03M13/39 ,  G11B20/10 ,  G11B20/10009 ,  G11B20/10046 ,  G11B20/10425 ,  G11B20/14 ,  G11B20/18 ,  G11B2020/00065 ,  G11B2020/1287

Abstract: In a digital recorded data reproduction which applies PRML signal processing, it is an object to enhance a reproduction signal quality and a playability for an abnormal signal by an offset correction and a phase-interpolation-type digital phase-locked loop. A prescribed frequency band of a reproduction signal is emphasized by a waveform equalizing unit 2, and its output signal is sampled by an asynchronous clock at an analog/digital converter 3. After a sampling signal is subjected to the offset correction, PR equalization is performed by a transversal filter 6 and a tap weighting factor control unit 8 which applies LMS algorithm, and a signal of a regular sampling phase is reproduced from its output signal by a high-order interpolation filter 7 employing a digital phase-locked loop 11. The reproduced signal in a regular phase is demodulated by a maximum likelihood decoder 12, thereby to reproduce digital data recorded on a medium.

Abstract translation: 在应用PRML信号处理的数字记录数据再现中，目的是通过偏移校正和相位插值型数字锁相环来增强异常信号的再现信号质量和可播放性。 再现信号的规定频带由波形均衡单元2强调，其输出信号由模/数转换器3的异步时钟进行采样。对采样信号进行偏移校正后，执行PR均衡 通过横向滤波器6和采用LMS算法的抽头权重因子控制单元8，并且通过采用数字锁相环11的高阶内插滤波器7从其输出信号再现正常采样相位的信号。 常规相位的再现信号由最大似然解码器12解调，从而再现记录在介质上的数字数据。

公开(公告)号：US08411544B2

公开(公告)日：2013-04-02

申请号：US13251874

申请日：2011-10-03

Applicant: Youichi Ogura ,  Noriyuki Masunari ,  Yorikazu Takao

Inventor： Youichi Ogura ,  Noriyuki Masunari ,  Yorikazu Takao

IPC: G11B7/00

CPC classification number: G11B20/10212

Abstract: An instantaneous jitter information detection section detects, based on first and second digital values indicating different polarities relative to a predetermined reference value, an instantaneous gradient value corresponding to a difference value between the first and second digital values, and an instantaneous deviation value corresponding to a difference value between an intermediate value between the first and second digital values and the reference value. An information conversion section converts, based on an inversely proportional conversion table, the instantaneous gradient value to an inversely proportional value. An arithmetic section detects an instantaneous variance value by multiplying the instantaneous deviation value and the inversely proportional value together, and squaring a value obtained by the multiplication, and detects an integrated value by accumulating the instantaneous variance value. A standard deviation detection section detects a square root of a mean value of the integrated value as the absolute jitter value.

Abstract translation: 瞬时抖动信息检测部分根据相对于预定参考值指示不同极性的第一和第二数字值检测对应于第一和第二数字值之间的差值的瞬时梯度值和对应于 第一和第二数字值之间的中间值与参考值之间的差值。 信息转换部分将基于逆比例转换表将瞬时梯度值转换为反比例值。 算术部分通过将瞬时偏差值和反比例值相乘并检测通过乘法获得的值的平方来检测瞬时方差值，并且通过累加瞬时方差值来检测积分值。 标准差检测部检测积分值的平均值的平方根作为绝对抖动值。