公开(公告)号：US07212476B2

公开(公告)日：2007-05-01

申请号：US10275536

申请日：2002-03-08

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：US20060187800A1

公开(公告)日：2006-08-24

申请号：US11405590

申请日：2006-04-18

Applicant: Youichi Ogura

Inventor： Youichi Ogura

IPC: G11B7/00

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：US20060062118A1

公开(公告)日：2006-03-23

申请号：US10530276

申请日：2004-05-14

Applicant: Kazutoshi Aida ,  Youichi Ogura ,  Toshihiko Takahashi

Inventor： Kazutoshi Aida ,  Youichi Ogura ,  Toshihiko Takahashi

IPC: G11B7/00 ,  G11B20/00

CPC classification number: G11B20/10194 ,  G11B7/005

Abstract: An information reproduction apparatus and method according to the present invention are provided so as to solve the problem that signal quality is degraded in a normal signal part when always performing a correction of a transient in reproducing information recorded in a medium, and the sag cancellation controller (103) detects whether the pickup output signal (S101) is normal or abnormal, and the sag cancellation part (104) performs a correction of a transient only during a period when the pickup output signal (S101) is detected as abnormal, thereby preventing degradation of signal quality, which is caused by performing a correction of a transient on a normal signal part, and an appropriate correction of a transient can be performed on an abnormal signal part, thereby enabling a stable reproduced signal (S104) to be obtained.

Abstract translation: 提供了根据本发明的信息再现装置和方法，以解决在总是执行对记录在介质中的再现信息中的瞬态的校正时的正常信号部分中的信号质量下降的问题，以及下垂消除控制器 （103）检测拾取输出信号（S101）是正常还是异常，并且下垂消除部分（104）仅在检测到输出信号（S101）被检测到异常的时段期间执行瞬变的校正， 从而防止由于对正常信号部分进行瞬变的校正而引起的信号质量的劣化，并且可以对异常信号部分进行适当的瞬变校正，从而使得稳定的再现信号（S104）能够 得到。

公开(公告)号：US20050138534A1

公开(公告)日：2005-06-23

申请号：US10973127

申请日：2004-10-26

Applicant: Takeshi Nakajima ,  Keisuke Fujimoto ,  Youichi Ogura

Inventor： Takeshi Nakajima ,  Keisuke Fujimoto ,  Youichi Ogura

IPC: G11B20/10 ,  G11B20/18 ,  H03M13/00 ,  H03M13/03

CPC classification number: G11B20/18 ,  G11B2020/1863 ,  H03M13/395 ,  H03M13/41 ,  H03M13/6508

Abstract: A maximum likelihood encoding apparatus is provided, which is constructed to be compatible with a plurality of signals reproduced from a plurality of recording media having a plurality of types. The apparatus comprises a path metric value generation section for generating a plurality of path metric values corresponding to a recording medium having one of the plurality of types based on a type signal indicating the one of the plurality of types, and a path memory section for detecting digital information from a signal reproduced from the recording medium having the one of the plurality of types based on the plurality of path metric values.

Abstract translation: 提供了一种最大似然编码装置，其被构造为与从具有多种类型的多个记录介质再现的多个信号兼容。 该装置包括：路径度量值生成部，用于基于表示多种类型中的一种的类型信号，生成与具有多种类型中的一种的记录介质对应的多个路径度量值;以及路径存储部， 基于多个路径度量值，从具有多种类型中的一种的记录介质再现的信号的数字信息。

公开(公告)号：US20050018578A1

公开(公告)日：2005-01-27

申请号：US10871062

申请日：2004-06-21

Applicant: Youichi Ogura ,  Toshihiko Takahashi ,  Kazutoshi Aida ,  Kouji Okamoto

Inventor： Youichi Ogura ,  Toshihiko Takahashi ,  Kazutoshi Aida ,  Kouji Okamoto

IPC: G11B3/00 ,  G11B5/09 ,  G11B20/10 ,  G11B20/14 ,  G11B20/22

CPC classification number: G11B20/10425 ,  G11B20/10009 ,  G11B20/10037 ,  G11B20/10055 ,  G11B20/10222 ,  G11B20/1403 ,  G11B20/22 ,  G11B2020/1288 ,  G11B2220/2541

Abstract: When generating a sampling clock of an A/D converter for digitizing a playback signal from an optical disc, an over sampling clock generated by a PLL is used. Further, zerocross position information and reference information of a playback digital signal that is obtained by A/D conversion using the over sampling clock are converted into those synchronized with the channel bit clock by an operation cycle conversion unit, and then supplied to a PRML signal processing unit and a level judgement binarization unit.

Abstract translation: 当产生用于数字化来自光盘的重放信号的A / D转换器的采样时钟时，使用由PLL产生的过采样时钟。 此外，通过使用过采样时钟的A / D转换获得的重放数字信号的零交叉位置信息和参考信息被转换为与通道位时钟同步的操作周期转换单元，然后被提供给PRML信号 处理单元和级别判断二值化单元。

公开(公告)号：US20090257334A1

公开(公告)日：2009-10-15

申请号：US11995634

申请日：2006-07-20

Applicant: Youichi Ogura ,  Tatsushi Hiraki ,  Yorikazu Takao

Inventor： Youichi Ogura ,  Tatsushi Hiraki ,  Yorikazu Takao

IPC: G11B27/30 ,  H03M1/12

CPC classification number: G11B20/10009 ,  G11B20/10046 ,  G11B20/10055 ,  G11B20/10083 ,  G11B20/10101 ,  G11B20/10111 ,  G11B20/10222 ,  G11B20/1403 ,  G11B2020/1287 ,  G11B2220/2562 ,  G11B2220/2575

Abstract: A digital signal reproducing apparatus includes an analog to digital converter for sampling and quantizing a signal read from an optical recording medium in accordance with a reproduced clock having a frequency which is one-half of a channel bit frequency and outputting an obtained digital RF signal, an offset compensation circuit for reducing an offset component in an amplitude direction from the digital RF signal, and a simplified interpolation filter for reconstructing a signal indicating a predetermined pattern recorded in the optical recording medium from the output signal of the offset compensation circuit and outputting the reconstructed signal. A control operation is performed to reduce the magnitudes of respective values shown by first phase error information on a section with the predetermined pattern and by second phase error information on a section other than the section with the predetermined pattern.

Abstract translation: 一种数字信号再生装置，具有模拟数字转换器，用于根据具有频率为通道位频率的二分之一的频率的再生时钟对从光记录介质读取的信号进行采样和量化，并输出所获得的数字RF信号， 偏移补偿电路，用于减少来自数字RF信号的振幅方向上的偏移分量;以及简化内插滤波器，用于根据偏移补偿电路的输出信号重建指示记录在光学记录介质中的预定模式的信号，并输出 重建信号。 执行控制操作以减小具有预定模式的部分上的第一相位误差信息所示的各个值的大小以及除了具有预定模式的部分之外的部分的第二相位误差信息。

公开(公告)号：US20090028019A1

公开(公告)日：2009-01-29

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: G11B5/58

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：US07339872B2

公开(公告)日：2008-03-04

申请号：US10942949

申请日：2004-09-17

Applicant: Youichi Ogura

Inventor： Youichi Ogura

IPC: G11B5/09

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：US20060239655A1

公开(公告)日：2006-10-26

申请号：US11344184

申请日：2006-02-01

Applicant: Youichi Ogura ,  Shinichi Konishi

Inventor： Youichi Ogura ,  Shinichi Konishi

IPC: H04N7/26

CPC classification number: G11B20/10055 ,  G11B20/10037 ,  G11B20/10046 ,  G11B20/10083 ,  G11B20/10101 ,  G11B20/10111 ,  G11B20/10166 ,  G11B20/10203 ,  G11B20/10212 ,  G11B20/10222 ,  G11B20/1876 ,  G11B2220/2537

Abstract: After a playback RF signal 3 detected from an optical disc medium 1 is waveform-shaped, it is converted into a digital RF signal 6 with a sampling clock 8 having a cycle twice as long as a channel clock. Thereafter, a first offset correction circuit 9 corrects an offset fluctuation in a high frequency band, and a digital adaptive equalizer 23 performs adaptive equalization, and then a second offset correction circuit 27 corrects an offset component that remains after the offset correction by the first offset correction circuit 9, thereby demodulating a digital binary signal 37. Therefore, even when high-speed playback is carried out and an asymmetry depending on the recording quality is large, a reduction in power consumption can be realized while maintaining high-performance playback. Consequently, it is possible to provide an optical disc playback apparatus which can realize sufficient playback performance at low power consumption.

公开(公告)号：US20060208766A1

公开(公告)日：2006-09-21

申请号：US11372051

申请日：2006-03-10

Applicant: Youichi Ogura ,  Toshihiko Takahashi ,  Shinichi Konishi

Inventor： Youichi Ogura ,  Toshihiko Takahashi ,  Shinichi Konishi

IPC: H03D13/00 ,  G01R25/00

CPC classification number: G11B20/10212 ,  G11B20/10037 ,  G11B20/10046 ,  G11B20/10194 ,  G11B20/10425 ,  G11B20/10481 ,  G11B20/14 ,  G11B20/22 ,  G11B2220/2537

Abstract: In a jitter detection apparatus, a playback RF signal 3 detected from an optical disc medium 1 is subjected to waveform shaping, and thereafter, converted into a digital RF signal 6 with a sampling clock having a cycle twice as long as a cycle of a channel clock. Thereafter, an offset variation in a high-frequency band is corrected by an offset correction circuit 9, and data which are missing in the time direction are restored by a Nyquist interpolation filter 23. Then, positions where jitter is to be extracted are selected from an output signal of the Nyquist interpolation filter 23, by a jitter detection preprocessing circuit 28, according to the playback speed of the optical disc medium 1 and the arithmetic capacity of a digital signal operation circuit 29, whereby highly accurate jitters can be extracted by using the digital signal operation circuit 29.

Abstract translation: 在抖动检测装置中，从光盘介质1检测到的重放RF信号3经受波形整形，然后被转换成具有采样时钟的数字RF信号6，采样时钟的周期是通道的周期的两倍 时钟。 此后，通过偏移校正电路9校正高频带中的偏移变化，并且通过奈奎斯特内插滤波器23恢复在时间方向上丢失的数据。然后，从提取抖动的位置选择 奈奎斯特插值滤波器23的输出信号，通过抖动检测预处理电路28，根据光盘介质1的重放速度和数字信号操作电路29的运算能力，由此可以通过使用高精度的抖动来提取高精度的抖动 数字信号运算电路29。