公开(公告)号：US07764580B2

公开(公告)日：2010-07-27

申请号：US11580643

申请日：2006-10-12

申请人： Keishi Ueno

发明人： Keishi Ueno

IPC分类号： G11B19/02

CPC分类号： G11B20/10009 ,  G11B20/10046

摘要： HMW demodulation is effected more reliably with a simple configuration. A reproduced wobble signal is caused to pass through a BPF previously set to a center frequency 2fwob, to thus enhance a second harmonic component. The wobble signal having passed through a BPF is multiplied by a second harmonic signal. Subsequently, a peak envelope signal and a bottom envelope signal of the multiplied wobble signal are extracted. The peak envelope signal is discriminated from the first preset threshold value. A result of this discrimination becomes a signal used for detecting an HMW[1] wobble waveform. Similarly, a bottom envelope signal is discriminated from a preset second threshold value. The result of discrimination becomes a signal used for detecting an HMW[0] wobble waveform.

摘要翻译： HMW解调通过简单的配置更可靠地实现。 使再现的摆动信号通过预先设定为中心频率2fwob的BPF，从而增强二次谐波分量。 通过BPF的摆动信号乘以二次谐波信号。 随后，提取倍增的摆动信号的峰值包络信号和底部包络信号。 峰值包络信号与第一预设阈值相区别。 该鉴别的结果成为用于检测HMW [1]摆动波形的信号。 类似地，从预设的第二阈值来区分底包络信号。 鉴别结果成为用于检测HMW [0]摆动波形的信号。

公开(公告)号：US20070091771A1

公开(公告)日：2007-04-26

申请号：US11580643

申请日：2006-10-12

申请人： Keishi Ueno

发明人： Keishi Ueno

IPC分类号： G11B7/00

CPC分类号： G11B20/10009 ,  G11B20/10046

摘要： HMW demodulation is effected more reliably with a simple configuration. A reproduced wobble signal is caused to pass through a BPF previously set to a center frequency 2fwob, to thus enhance a second harmonic component. The wobble signal having passed through a BPF is multiplied by a second harmonic signal. Subsequently, a peak envelope signal and a bottom envelope signal of the multiplied wobble signal are extracted. The peak envelope signal is discriminated from the first preset threshold value. A result of this discrimination becomes a signal used for detecting an HMW[1] wobble waveform. Similarly, a bottom envelope signal is discriminated from a preset second threshold value. The result of discrimination becomes a signal used for detecting an HMW[0] wobble waveform.

摘要翻译： HMW解调通过简单的配置更可靠地实现。 使再现的摆动信号通过预先设定为中心频率2fwob的BPF，从而增强二次谐波分量。 通过BPF的摆动信号乘以二次谐波信号。 随后，提取倍增的摆动信号的峰值包络信号和底部包络信号。 峰值包络信号与第一预设阈值相区别。 该鉴别的结果成为用于检测HMW [1]摆动波形的信号。 类似地，从预设的第二阈值来区分底包络信号。 鉴别结果成为用于检测HMW [0]摆动波形的信号。

公开(公告)号：US08270274B2

公开(公告)日：2012-09-18

申请号：US12580095

申请日：2009-10-15

申请人： Keishi Ueno

发明人： Keishi Ueno

IPC分类号： G11B20/18

CPC分类号： G11B20/1816 ,  G11B2020/1823 ,  G11B2220/2537

摘要： There is provided an optical disk device which quickly inspects the presence or absence of a defect in an optical disk in order to ensure that it can be played back on various types of optical disk devices. A detection unit uses signals supplied from a playback unit to detect defects from each of an RF signal, a focus error signal, and a tracking error signal. A CPU stores positions of the defects in a memory. The playback unit plays back data while degrading playback conditions at the positions of the defects . The detection unit detects an error rate of the played-back data, and finally determines whether the optical disk is “OK” or “NG”.

摘要翻译： 提供了一种光盘装置，其可以快速检查光盘中是否存在缺陷，以确保可以在各种类型的光盘装置上重放。 检测单元使用从重放单元提供的信号来检测RF信号，聚焦误差信号和跟踪误差信号中的每一个的缺陷。 CPU将缺陷的位置存储在存储器中。 播放单元在缺陷的位置降低重放条件的同时回放数据。 检测单元检测重放数据的错误率，最后确定光盘是“OK”还是“NG”。

公开(公告)号：US07957239B2

公开(公告)日：2011-06-07

申请号：US11715784

申请日：2007-03-07

申请人： Keishi Ueno

发明人： Keishi Ueno

IPC分类号： G11B15/52

CPC分类号： G11B7/1267 ,  G11B7/1263

摘要： In an optical disk drive, running OPC (ROPC) is performed without fail, to thus enhance recording quality. ROPC is performed by use of a remaining portion of an area for APC operation within an APC area of a recording unit (RUB) in a next-generation optical disk such as a blu-ray disk. ROPC is performed by means of tentatively writing test data having a length of 50 T longer than a specified length of data to be recorded; and detecting level B of the amount of light reflected at that time. The APC area is formed from five wobble periods. APC is performed in periods of first two wobbles, and ROPC is performed in remaining three wobble periods.

摘要翻译： 在光盘驱动器中，运行OPC（ROPC）不会失败，从而提高记录质量。 ROPC通过在诸如蓝光盘的下一代光盘中的记录单元（RUB）的APC区域内使用用于APC操作的区域的剩余部分来执行。 通过暂时写入具有长于要记录的数据的指定长度的长度为50T的测试数据来执行ROPC; 并检测当时反射的光量B。 APC区域由五个摆动周期组成。 APC在前两个摆动周期执行，并且在剩余的三个摆动周期中执行ROPC。

公开(公告)号：US07541955B2

公开(公告)日：2009-06-02

申请号：US11859632

申请日：2007-09-21

申请人： Keishi Ueno

发明人： Keishi Ueno

IPC分类号： H03M1/12

CPC分类号： H03M1/1235 ,  H03M1/168 ,  H03M1/188 ,  H03M1/365 ,  H03M1/367 ,  H03M1/44

摘要： An A/D conversion circuit converts an asymmetric analogue signal into a digital signal. In an A/D conversion circuit of a parallel type, a central value of a reference voltage is adjusted by means of an average of an input analogue signal, such as a reproduced RF signal from an optical disk, or the like. The average value of the input analogue signal is detected by means of a low-pass filter (LPF). Respective comparators compare the input analogue signal with the reference voltage, and encodes a result of comparison by means of an encoder. An A/D conversion characteristic determined by voltage values from a maximum value Vref1 to an average value and another A/D conversion characteristic determined by voltage values from the average value to a minimum value Vref2 become nonlinear, thereby becoming able to address asymmetry of the input analogue signal.

摘要翻译： A / D转换电路将不对称模拟信号转换为数字信号。 在并行类型的A / D转换电路中，通过诸如来自光盘的再现的RF信号之类的输入模拟信号的平均值来调整参考电压的中心值。 通过低通滤波器（LPF）检测输入模拟信号的平均值。 相应的比较器将输入模拟信号与参考电压进行比较，并通过编码器对比较结果进行编码。 由从最大值Vref1到平均值的电压值确定的A / D转换特性以及由平均值至最小值Vref2的电压值确定的另一个A / D转换特性变为非线性，从而变得能够解决 输入模拟信号。

公开(公告)号：US20070211593A1

公开(公告)日：2007-09-13

申请号：US11715784

申请日：2007-03-07

申请人： Keishi Ueno

发明人： Keishi Ueno

IPC分类号： G11B7/12

CPC分类号： G11B7/1267 ,  G11B7/1263

摘要： In an optical disk drive, running OPC (ROPC) is performed without fail, to thus enhance recording quality. ROPC is performed by use of a remaining portion of an area for APC operation within an APC area of a recording unit (RUB) in a next-generation optical disk such as a blu-ray disk. ROPC is performed by means of tentatively writing test data having a length of 50 T longer than a specified length of data to be recorded; and detecting level B of the amount of light reflected at that time. The APC area is formed from five wobble periods. APC is performed in periods of first two wobbles, and ROPC is performed in remaining three wobble periods.

摘要翻译： 在光盘驱动器中，运行OPC（ROPC）不会失败，从而提高记录质量。 ROPC通过在诸如蓝光盘的下一代光盘中的记录单元（RUB）的APC区域内使用用于APC操作的区域的剩余部分来执行。 通过暂时写入具有长于要记录的数据的指定长度的长度为50T的测试数据来执行ROPC; 并检测当时反射的光量B。 APC区域由五个摆动周期组成。 APC在前两个摆动周期执行，并且在剩余的三个摆动周期中执行ROPC。

公开(公告)号：US20050058053A1

公开(公告)日：2005-03-17

申请号：US10901560

申请日：2004-07-29

申请人： Keishi Ueno ,  Kiyoshi Shidara

发明人： Keishi Ueno ,  Kiyoshi Shidara

IPC分类号： G11B7/0045 ,  G11B7/00 ,  G11B7/005 ,  G11B7/125

CPC分类号： G11B7/1263

摘要： An optical disc apparatus provided with an automatic power control circuit which controls power of laser light by obtaining a difference between a value detected by a front monitor 6 and a target value individually for reproduction power and for recording power includes: a detector 7 for detecting light reflected from an optical disc, a sample-hold circuit 26 which performs on an output of the detector 7 a sample-hold operation at the timing of the reproduction power; and a microcomputer 29 which computes a reference value from the reflected light of the reproduction power at the timing just before the start of a recording operation after receiving a recording command until opening of a recording gate, and at the time of recording operation an intensity of reflected light on which a sample-hold operation is performed is compared with the reference value to correct a target value of the reproduction power.

摘要翻译： 一种设置有自动功率控制电路的光盘装置，其通过获得由前监视器6检测的值和用于再现功率的个别目标值和记录功率之间的差来控制激光的功率，包括：用于检测光的检测器7 从光盘反射的采样保持电路26，其在检测器7的输出端执行在再现功率的定时处的采样保持操作; 以及微计算机29，其在接收到记录命令直到打开记录门之前的记录操作开始之前的定时从再现功率的反射光计算参考值，并且在记录操作时的强度 将其上执行采样保持操作的反射光与参考值进行比较以校正再现功率的目标值。

公开(公告)号：US5305157A

公开(公告)日：1994-04-19

申请号：US965797

申请日：1992-10-23

申请人： Sumio Wada ,  Keishi Ueno

发明人： Sumio Wada ,  Keishi Ueno

IPC分类号： G11B5/09 ,  G11B19/02 ,  G11B20/10 ,  G11B20/12 ,  G11B21/08 ,  G11B27/30 ,  G11B5/02

CPC分类号： G11B27/3027 ,  G11B19/02 ,  G11B20/10009 ,  G11B20/1252 ,  G11B21/085 ,  G11B2020/1282 ,  G11B2220/20

摘要： A hard disk drive is disclosed in which the disk has tracks each divided into alternating data sectors and servo sectors, with the control data such as track addresses on the servo sectors being normally recorded more stably than the main data on the data sectors. In order to obtain read pulses representative of the peaks of the output waveform of a transducer, this waveform is directed on one hand into a differentiator circuit and thence into a wave shaping circuit for the provision of data pulses which rise and decay in synchronism with the peaks of the transducer output waveform. On the other hand, the transducer output waveform is sent into a gate pulse circuit, in which the waveform is compared with a reference signal in order to provide gate or window pulses. A logic circuit is provided for ascertaining whether the data pulses rise and decay within the durations of the gate pulses and, if they do, for producing read pulses indicative of the rises and decays of the data pulses. The duration of the gate pulses is made shorter for recovery of the control data than for main data recovery, with a view to more precise detection of the peaks of the transducer output waveform representative of the control data.

摘要翻译： 公开了一种硬盘驱动器，其中盘具有每个被划分为交替数据扇区和伺服扇区的轨道，其中伺服扇区上的诸如轨道地址的控制数据正常地比数据扇区上的主数据更稳定地记录。 为了获得表示换能器的输出波形的峰值的读取脉冲，该波形一方面被引导到微分电路中，然后被引入到波形整形电路中，用于提供数据脉冲，该数据脉冲与 传感器输出波形的峰值。 另一方面，传感器输出波形被发送到门脉冲电路，其中波形与参考信号进行比较，以提供门脉冲或窗口脉冲。 提供逻辑电路，用于确定数据脉冲是否在门脉冲的持续时间内上升和衰减，并且如果它们有，则产生用于产生指示数据脉冲的上升和衰减的读取脉冲。 为了更准确地检测代表控制数据的传感器输出波形的峰值，门控脉冲的持续时间使得恢复控制数据的持续时间比主数据恢复更短。