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1. 发明授权

US07525887B2 Playback signal processing apparatus and optical disc device 失效
标题翻译：播放信号处理装置和光盘装置
公开(公告)号：US07525887B2
公开(公告)日：2009-04-28
申请号：US10871062
申请日：2004-06-21
申请人： Youichi Ogura , Toshihiko Takahashi , Kazutoshi Aida , Kouji Okamoto
发明人： Youichi Ogura , Toshihiko Takahashi , Kazutoshi Aida , Kouji Okamoto
IPC分类号： G11B15/52
CPC分类号： G11B20/10425 , G11B20/10009 , G11B20/10037 , G11B20/10055 , G11B20/10222 , G11B20/1403 , G11B20/22 , G11B2020/1288 , G11B2220/2541
摘要： 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.
摘要翻译：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。

2. 发明申请

US20050018578A1 Playback signal processing apparatus and optical disc device 失效
标题翻译：播放信号处理装置和光盘装置
公开(公告)号：US20050018578A1
公开(公告)日：2005-01-27
申请号：US10871062
申请日：2004-06-21
申请人： Youichi Ogura , Toshihiko Takahashi , Kazutoshi Aida , Kouji Okamoto
发明人： Youichi Ogura , Toshihiko Takahashi , Kazutoshi Aida , Kouji Okamoto
IPC分类号： G11B3/00 , G11B5/09 , G11B20/10 , G11B20/14 , G11B20/22
CPC分类号： G11B20/10425 , G11B20/10009 , G11B20/10037 , G11B20/10055 , G11B20/10222 , G11B20/1403 , G11B20/22 , G11B2020/1288 , G11B2220/2541
摘要： 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.
摘要翻译：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。

3. 发明授权

US07428195B2 Information reproduction apparatus and information reproduction method 失效
标题翻译：信息再现装置和信息再现方法
公开(公告)号：US07428195B2
公开(公告)日：2008-09-23
申请号：US10530276
申请日：2004-05-14
申请人： Kazutoshi Aida , Youichi Ogura , Toshihiko Takahashi
发明人： Kazutoshi Aida , Youichi Ogura , Toshihiko Takahashi
IPC分类号： G11B7/005
CPC分类号： G11B20/10194 , G11B7/005
摘要： 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.
摘要翻译：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。

4. 发明申请

US20060062118A1 Information reproduction device and information reproduction method 失效
标题翻译：信息再现装置和信息再现方法
公开(公告)号：US20060062118A1
公开(公告)日：2006-03-23
申请号：US10530276
申请日：2004-05-14
申请人： Kazutoshi Aida , Youichi Ogura , Toshihiko Takahashi
发明人： Kazutoshi Aida , Youichi Ogura , Toshihiko Takahashi
IPC分类号： G11B7/00 , G11B20/00
CPC分类号： G11B20/10194 , G11B7/005
摘要： 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.
摘要翻译：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。

5. 发明授权

US08031572B2 Optical disc device and recording condition setting method 失效
标题翻译：光盘装置和记录条件设定方法
公开(公告)号：US08031572B2
公开(公告)日：2011-10-04
申请号：US12601393
申请日：2008-05-16
申请人： Toshihiko Takahashi , Kazutoshi Aida , Masaharu Imura
发明人： Toshihiko Takahashi , Kazutoshi Aida , Masaharu Imura
IPC分类号： G11B7/00 , G11B20/10
CPC分类号： G11B7/0045 , G11B7/1267
摘要： The present invention is aimed at providing an optical disc device and a recording condition setting method which can automatically determine an optical recording condition to an optical disc, and the optical disc device comprises an optical pickup which records data on a disc; a data encoder which modulates data to be recorded; a recording timing setting means which sets a timing of recording the data on the disc; a phase error detection means which measures an error amount of a mark recorded on the disc from a position where the mark should be properly located; an error convergence means which calculates error information indicating an optimum position of the mark; a recording timing calculation means which calculates a correction value of the recording timing to be set on the recording timing setting means, based on the error information; and a control means which feedbacks an output of the recording timing calculation means to the recording timing setting means, thereby to optimize the recording timing.
摘要翻译：本发明的目的在于提供一种光盘装置和记录条件设定方法，其可以自动地确定对光盘的光记录状态，并且光盘装置包括在盘上记录数据的光学拾取器; 调制要记录的数据的数据编码器; 记录定时设置装置，其设置在盘上记录数据的定时; 一个相位误差检测装置，用于从标记应正确定位的位置测量记录在盘上的标记的误差量; 错误收敛装置，其计算指示标记的最佳位置的错误信息; 记录定时计算装置，其基于所述错误信息计算在所述记录定时设置装置上设置的记录定时的校正值; 以及将记录定时计算装置的输出反馈到记录定时设定装置的控制装置，从而优化记录定时。

6. 发明授权

US07171608B2 Data playback equipment for playing back data recorded on a disk medium 有权
标题翻译：用于播放记录在磁盘介质上的数据的数据回放设备
公开(公告)号：US07171608B2
公开(公告)日：2007-01-30
申请号：US10664882
申请日：2003-09-22
申请人： Kazutoshi Aida , Toshihiko Takahashi , Ryuusuke Horibe
发明人： Kazutoshi Aida , Toshihiko Takahashi , Ryuusuke Horibe
IPC分类号： H03M13/03
CPC分类号： G11B20/10009 , G11B20/10046 , G11B20/10055
摘要： In playback of data recorded on an optical disk, an error minimization circuit holds a plurality of ideal values for partial response (PR) equalization as equalization targets, and updates tap coefficients of a finite impulse response (FIR) filter so that the errors between the outputs of the FIR filter reflecting the output of an analog-to-digital converter (ADC) and the equalization targets are minimized. An error detection circuit and an addition/weighting circuit generate a signal representing the errors between the outputs of the FIR filter and the equalization targets as a parameter signal correlated with the error rate of played-back data. The quality of the analog signal is adjusted so that the parameter signal is minimized, to thereby optimize the margin of the error rate of played-back data.
摘要翻译：在记录在光盘上的数据的回放中，误差最小化电路将用于部分响应（PR）均衡的多个理想值保持为均衡目标，并且更新有限脉冲响应（FIR）滤波器的抽头系数，使得反映模数转换器（ADC）的输出的FIR滤波器的输出和均衡目标被最小化。误差检测电路和加法/加权电路产生表示FIR滤波器和均衡目标的输出之间的误差的信号，作为与重放数据的误码率相关的参数信号。调整模拟信号的质量使参数信号最小化，从而优化回放数据的误码率的余量。

7. 发明申请

US20100182886A1 OPTICAL DISC DEVICE AND RECORDING CONDITION SETTING METHOD 失效
标题翻译：光盘设备和记录条件设置方法
公开(公告)号：US20100182886A1
公开(公告)日：2010-07-22
申请号：US12601393
申请日：2008-05-16
申请人： Toshihiko Takahashi , Kazutoshi Aida , Masaharu Imura
发明人： Toshihiko Takahashi , Kazutoshi Aida , Masaharu Imura
IPC分类号： G11B27/36
CPC分类号： G11B7/0045 , G11B7/1267
摘要： The present invention is aimed at providing an optical disc device and a recording condition setting method which can automatically determine an optical recording condition to an optical disc, and the optical disc device comprises an optical pickup which records data on a disc; a data encoder which modulates data to be recorded; a recording timing setting means which sets a timing of recording the data on the disc; a phase error detection means which measures an error amount of a mark recorded on the disc from a position where the mark should be properly located; an error convergence means which calculates error information indicating an optimum position of the mark; a recording timing calculation means which calculates a correction value of the recording timing to be set on the recording timing setting means, based on the error information; and a control means which feedbacks an output of the recording timing calculation means to the recording timing setting means, thereby to optimize the recording timing.
摘要翻译：本发明的目的在于提供一种光盘装置和记录条件设定方法，其可以自动地确定对光盘的光记录状态，并且光盘装置包括在盘上记录数据的光学拾取器; 调制要记录的数据的数据编码器; 记录定时设置装置，其设置在盘上记录数据的定时; 一个相位误差检测装置，用于从标记应正确定位的位置测量记录在盘上的标记的误差量; 错误收敛装置，其计算指示标记的最佳位置的错误信息; 记录定时计算装置，其基于所述错误信息计算在所述记录定时设置装置上设置的记录定时的校正值; 以及将记录定时计算装置的输出反馈到记录定时设定装置的控制装置，从而优化记录定时。

8. 发明授权

US07215631B2 Signal processing device and signal processing method 有权
标题翻译：信号处理装置及信号处理方法
公开(公告)号：US07215631B2
公开(公告)日：2007-05-08
申请号：US10510988
申请日：2003-12-25
申请人： Ryusuke Horibe , Kazutoshi Aida
发明人： Ryusuke Horibe , Kazutoshi Aida
IPC分类号： G11B7/00
CPC分类号： G11B20/10009 , G11B2020/1863
摘要： A feedback loop structure including an operational amplifier unit (1) for amplifying a reproduction signal of recorded information and a gain/offset control unit (6) for controlling an amplitude and an offset of an output of the operational amplifier unit (1) so that each of the amplitude and the offset becomes a predetermined value is adopted, and accurate information for an asymmetry amount is obtained by a binarization unit (7) for receiving the output of the operational amplifier unit (1) and performing binarization while adjusting a slice level by feedback control so that a duty ratio after the binarization substantially becomes a predetermined value. Based on the asymmetry amount information, a judgment level of a Viterbi decoding unit (15) is changed, thereby reducing a reproduction error rate.
摘要翻译：一种反馈环结构，包括用于放大记录信息的再现信号的运算放大器单元（1）和用于控制运算放大器单元（1）的输出的幅度和偏移的增益/偏移控制单元（6），使得采用幅度和偏移中的每一个变为预定值，并且通过用于接收运算放大器单元（1）的输出的二值化单元（7）获得用于不对称量的精确信息，并且在调整限幅电平的同时执行二值化通过反馈控制使得二值化之后的占空比基本上变为预定值。基于不对称量信息，维特比解码单元（15）的判断电平改变，从而降低再现错误率。

9. 发明授权

US07710851B2 Optical disc apparatus 有权
标题翻译：光盘装置
公开(公告)号：US07710851B2
公开(公告)日：2010-05-04
申请号：US11665075
申请日：2006-08-21
申请人： Kazutoshi Aida
发明人： Kazutoshi Aida
IPC分类号： G11B3/00
CPC分类号： G11B20/10009 , G11B7/005 , G11B20/10027 , G11B2220/2537
摘要： A variable gain amplifier (203: VGA) for amplifying an amplitude of a signal extracted by a pickup (202), an A/D converter (204) for converting the amplified signal into digital, and an amplitude detecting circuit (206) for detecting amplitude information from the digital information, are provided. A gain control circuit (205) for calculating a control value for the VGA (203) is calculated from the detected amplitude information, and an envelope generating circuit (207) for executing an operation of absorbing transfer characteristics of the VGA (203) from the control value for the VGA (203) and the amplitude information, are provided to generate an envelope extracted by the pickup (202). When the characteristics of the VGA (203) vary, a degree of the variation is calculated from the amplitude information of the signal extracted by the pickup (202) and amplitude information obtained by fixing the control value for the VGA (203), and characteristic correction is executed.
摘要翻译：一种用于放大由拾取器（202）提取的信号的幅度的可变增益放大器（203：VGA），用于将放大的信号转换为数字的A / D转换器（204），以及用于检测提供了来自数字信息的振幅信息。根据检测到的幅度信息计算用于计算VGA（203）的控制值的增益控制电路（205），以及用于执行从所述VGA（203）传送所述VGA（203）的传送特性的操作的信封发生电路（207）提供VGA（203）的控制值和振幅信息以产生由拾取器（202）提取的包络。当VGA（203）的特性变化时，根据由拾取器（202）提取的信号的振幅信息和通过固定VGA（203）的控制值获得的幅度信息来计算变化度，以及特性执行校正。

10. 发明申请

US20090207719A1 Optical Disc Apparatus 有权
标题翻译：光盘装置
公开(公告)号：US20090207719A1
公开(公告)日：2009-08-20
申请号：US11665075
申请日：2006-08-21
申请人： Kazutoshi Aida
发明人： Kazutoshi Aida
IPC分类号： G11B3/00
CPC分类号： G11B20/10009 , G11B7/005 , G11B20/10027 , G11B2220/2537
摘要： A variable gain amplifier (203: VGA) for amplifying an amplitude of a signal extracted by a pickup (202), an A/D converter (204) for converting the amplified signal into digital, and an amplitude detecting circuit (206) for detecting amplitude information from the digital information, are provided. A gain control circuit (205) for calculating a control value for the VGA (203) is calculated from the detected amplitude information, and an envelope generating circuit (207) for executing an operation of absorbing transfer characteristics of the VGA (203) from the control value for the VGA (203) and the amplitude information, are provided to generate an envelope extracted by the pickup (202). When the characteristics of the VGA (203) vary, a degree of the variation is calculated from the amplitude information of the signal extracted by the pickup (202) and amplitude information obtained by fixing the control value for the VGA (203), and characteristic correction is executed.
摘要翻译：一种用于放大由拾取器（202）提取的信号的幅度的可变增益放大器（203：VGA），用于将放大的信号转换为数字的A / D转换器（204），以及用于检测提供了来自数字信息的振幅信息。根据检测到的幅度信息计算用于计算VGA（203）的控制值的增益控制电路（205），以及用于执行从所述VGA（203）传送所述VGA（203）的传送特性的操作的信封发生电路（207）提供VGA（203）的控制值和振幅信息以产生由拾取器（202）提取的包络。当VGA（203）的特性变化时，根据由拾取器（202）提取的信号的振幅信息和通过固定VGA（203）的控制值获得的幅度信息来计算变化度，以及特性执行校正。

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