公开(公告)号：US20120044103A1

公开(公告)日：2012-02-23

申请号：US13287617

申请日：2011-11-02

申请人： Rie Kaihara ,  Masakazu Shigemori ,  Youichi Ogura ,  Junichi Naka ,  Tsuyoshi Matsushita

发明人： Rie Kaihara ,  Masakazu Shigemori ,  Youichi Ogura ,  Junichi Naka ,  Tsuyoshi Matsushita

IPC分类号： H03M1/36

CPC分类号： H03M1/204 ,  H03M1/365

摘要： A parallel interpolation A/D converter includes a reference voltage generation circuit configured to generate (m+1) different reference voltages VR1-VRm+1, where m is a positive integer, and VR1

摘要翻译： 并行内插A / D转换器包括：参考电压产生电路，被配置为产生（m + 1）不同的参考电压VR1-VRm + 1，其中m是正整数，VR1

公开(公告)号：US08022847B2

公开(公告)日：2011-09-20

申请号：US12666722

申请日：2008-06-16

申请人： Rie Kaihara ,  Youichi Ogura

发明人： Rie Kaihara ,  Youichi Ogura

IPC分类号： H03M1/06

CPC分类号： G11B20/10009 ,  G11B20/10027 ,  G11B20/10037 ,  G11B20/10046 ,  G11B20/10203 ,  G11B2220/216 ,  G11B2220/2562 ,  G11B2220/2575

摘要： A signal processing device, even when a steep difference in DC level is included in a signal read from a disc such as a DVD-RAM format, cuts off the DC level and pulls the read signal into an appropriate A/D input level. A steep difference in DC level between a data section and a CAPA section is absorbed by a first offset unit, and an asymmetry which occurs due to variations in the disc manufacturing stage is corrected by a second offset unit. Further, a control signal for operating the two offset units exclusively is generated by a controller, thereby controlling both offset units.

摘要翻译： 信号处理装置即使当从诸如DVD-RAM格式的盘读取的信号中包括DC电平的陡峭差异时，切断DC电平并将读取的信号拉至适当的A / D输入电平。 数据部分和CAPA部分之间的直流电平的急剧差异由第一偏移单元吸收，并且由于盘制造阶段的变化而发生的不对称性被第二偏移单元校正。 此外，用于仅由控制器产生用于操作两个偏移单元的控制信号，从而控制两个偏移单元。

公开(公告)号：US08004945B2

公开(公告)日：2011-08-23

申请号：US12282439

申请日：2007-03-13

申请人： Harumitsu Miyashita ,  Kohei Nakata ,  Hiroshi Ueda ,  Youichi Ogura

发明人： Harumitsu Miyashita ,  Kohei Nakata ,  Hiroshi Ueda ,  Youichi Ogura

IPC分类号： G11B7/00

CPC分类号： G11B20/10009 ,  G11B7/0053 ,  G11B7/08523 ,  G11B2220/2537

摘要： 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.

摘要翻译： 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：US20100188275A1

公开(公告)日：2010-07-29

申请号：US12666722

申请日：2008-06-16

申请人： Rie Kaihara ,  Youichi Ogura

发明人： Rie Kaihara ,  Youichi Ogura

IPC分类号： H03M1/12

CPC分类号： G11B20/10009 ,  G11B20/10027 ,  G11B20/10037 ,  G11B20/10046 ,  G11B20/10203 ,  G11B2220/216 ,  G11B2220/2562 ,  G11B2220/2575

摘要： It is an object of the present invention to provide a signal processing device which, even when a steep difference in DC level is included in a signal read from a disc such as a DVD-RAM format, cuts off the DC level and pulls the read signal into an appropriate A/D input level with an attempt to cost reduction. A steep difference in DC level between a data section and a CAPA section is absorbed by a first offset unit 1, and an asymmetry which occurs due to variations in the disc manufacturing stage is corrected by a second offset unit 2. Further, a control signal for operating the two offset units exclusively is generated by a controller 7, thereby to control the both offset units.

摘要翻译： 本发明的目的是提供一种信号处理装置，即使当从诸如DVD-RAM格式的盘读取的信号中包括DC电平的陡峭差异时，切断DC电平并拉出读取 信号转换成适当的A / D输入电平，试图降低成本。 数据部分和CAPA部分之间的直流电平的陡峭差异由第一偏移单元1吸收，并且由于盘制造阶段的变化而发生的不对称性被第二偏移单元2校正。此外，控制信号 用于仅由控制器7产生两个偏移单元的操作，从而控制两个偏移单元。

公开(公告)号：US20090103413A1

公开(公告)日：2009-04-23

申请号：US11917253

申请日：2006-07-20

申请人： Seiji Matsui ,  Youichi Ogura

发明人： Seiji Matsui ,  Youichi Ogura

IPC分类号： G11B27/36 ,  G11B7/00

CPC分类号： G11B20/10009 ,  H04L25/03038

摘要： 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.

摘要翻译： 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

申请人： Hiroki Mouri ,  Kouji Okamoto ,  Youichi Ogura

发明人： Hiroki Mouri ,  Kouji Okamoto ,  Youichi Ogura

IPC分类号： G11B7/00

CPC分类号： G11B7/0053

摘要： 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.

摘要翻译： 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

申请人： Youichi Ogura

发明人： Youichi Ogura

IPC分类号： G11B20/10

CPC分类号： 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

摘要： 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.

摘要翻译： 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

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

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

IPC分类号： G11B7/00

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

摘要： 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.

摘要翻译： 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

申请人： Youichi Ogura ,  Koichi Urita ,  Shinichiro Sato ,  Yoshimasa Oda

发明人： Youichi Ogura ,  Koichi Urita ,  Shinichiro Sato ,  Yoshimasa Oda

IPC分类号： G11B700

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

摘要： 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.

摘要翻译： 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：US20090257334A1

公开(公告)日：2009-10-15

申请号：US11995634

申请日：2006-07-20

申请人： Youichi Ogura ,  Tatsushi Hiraki ,  Yorikazu Takao

发明人： Youichi Ogura ,  Tatsushi Hiraki ,  Yorikazu Takao

IPC分类号： G11B27/30 ,  H03M1/12

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

摘要： 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.

摘要翻译： 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。