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39 条记录 (耗时 0.023 秒)

    Data recording/playback apparatus and signal processing method
    1.
    发明授权
    Data recording/playback apparatus and signal processing method 失效
    数据记录/回放装置及信号处理方法

    公开(公告)号：US5448544A

    公开(公告)日：1995-09-05

    申请号：US26817

    申请日：1993-03-05

    申请人： Hiroyuki Tsuchinaga ,  Takeshi Maeda ,  Kiyoshi Matsumoto

    发明人： Hiroyuki Tsuchinaga ,  Takeshi Maeda ,  Kiyoshi Matsumoto

    IPC分类号： G11B7/00 ,  G11B7/004 ,  G11B7/005 ,  G11B7/30 ,  G11B20/10 ,  G11B20/14 ,  G11B20/18 ,  H03M13/31 ,  G11B5/00 ,  H04N5/76

    CPC分类号： G11B20/1833 ,  G11B20/10009 ,  G11B20/1426 ,  H03M13/31 ,  G11B2020/1434 ,  G11B2020/1438 ,  G11B7/004

    摘要： A signal processing method for recording and playing back recorded data with decreased detection errors originating from residual marks characteristic of an overwrite medium is performed by 8/9 modulating input data, and by inverting the polarity of the modulated data string at each "1" bit to produce a DC-free recording pulse. The thus-recorded signal is played back through a playback equalizer 8 before being converted by an A/D converter 9 into digitized amplitude data. The digitized data are processed to determine an identification level, which identification level is stored as well as used to determine displacement quantities for quantized bits derived from the analog playback signal. The number of "1" bits is counted by a counter 20, and an error in the number of "1" bits is detected by a comparator 21. An error bit decision circuit 22 determines which bit is most likely to be erroneous on the basis of displacement quantity, and the likely erroneous bit is corrected prior to outputting the data for 8/9 demodulation.

    摘要翻译： 通过8/9调制输入数据和通过将调制数据串的每个“1”位的极性反转来执行用于记录和重放由重写介质的残差标记特性引起的具有降低的检测误差的记录数据的信号处理方法 以产生无DC记录脉冲。 这样记录的信号在由A / D转换器9转换成数字化幅度数据之前通过重放均衡器8重放。 处理数字化数据以确定识别级别，该标识级别被存储，并且用于确定从模拟播放信号导出的量化比特的位移量。 “1”位的数量由计数器20计数，并且由比较器21检测“1”位数的错误。错误位决定电路22基于该位置判定最可能是错误的位 的位移量，并且在输出用于8/9解调的数据之前校正可能的错误位。

    Optical disk apparatus having optimized focus shift mechanism control
    4.
    发明授权
    Optical disk apparatus having optimized focus shift mechanism control 失效
    具有优化的聚焦移位机构控制的光盘装置

    公开(公告)号：US5828636A

    公开(公告)日：1998-10-27

    申请号：US711147

    申请日：1996-09-10

    申请人： Kiyoshi Matsumoto ,  Hiroyuki Tsuchinaga ,  Tsuyoshi Toda

    发明人： Kiyoshi Matsumoto ,  Hiroyuki Tsuchinaga ,  Tsuyoshi Toda

    IPC分类号： G11B7/09 ,  G11B7/24 ,  G11B7/00

    CPC分类号： G11B7/094 ,  G11B7/0908 ,  G11B7/0912

    摘要： An optical disk recording/reproducing apparatus includes at least a focus shift mechanism for controlling a lens to focus a laser beam on a disk so as to form a beam spot on the disk, a reproduced signal evaluator for evaluating the quality of the reproduced signal on the basis of the output from a reproduced signal detector, a controller for setting the operation target point of the focus shift mechanism, where the best quality of the reproduced signal is attained, on the basis of the output from the reproduced signal evaluator, and an offset generator circuit for outputting a focus offset signal in response to a command from the controller. The operation target point of the focus shift mechanism is set to the optimal point where the jitter in the reproduced signal is rendered minimum.

    摘要翻译： 一种光盘记录/再现装置至少包括一个用于控制透镜以将激光束聚焦在盘上以便在光盘上形成光斑的聚焦移动机构，用于评估再现信号质量的再现信号评估器 来自再现信号检测器的输出的基础，用于根据来自再现信号评估器的输出设置获得再现信号的最佳质量的聚焦移位机构的操作目标点的控制器，以及 偏移发生器电路，用于响应于来自控制器的命令输出焦点偏移信号。 将聚焦移动机构的操作对象点设定为使再现信号中的抖动变为最小的最佳点。

    Magneto-optical recording system using recording waveform having a plurality of power levels providing high recording density
    6.
    发明授权
    Magneto-optical recording system using recording waveform having a plurality of power levels providing high recording density 失效
    使用具有提供高记录密度的多个功率电平的记录波形的磁光记录系统

    公开(公告)号：US5463600A

    公开(公告)日：1995-10-31

    申请号：US225315

    申请日：1994-04-08

    申请人： Fumiyoshi Kirino ,  Atsushi Saito ,  Tsuyoshi Toda ,  Hiroshi Ide ,  Hiroyuki Tsuchinaga ,  Takeshi Maeda ,  Fumio Kugiya

    发明人： Fumiyoshi Kirino ,  Atsushi Saito ,  Tsuyoshi Toda ,  Hiroshi Ide ,  Hiroyuki Tsuchinaga ,  Takeshi Maeda ,  Fumio Kugiya

    IPC分类号： G11B11/10 ,  G11B11/105 ,  G11B20/12 ,  G11C13/06 ,  G11B13/04

    CPC分类号： G11B11/10506 ,  G11B11/10595 ,  G11C13/06

    摘要： A magneto-optical disk system includes a magneto-optical disk and a disk drive. The magneto-optical disk drives provides a function of controlling the shape of a recorded domain by using a short wavelength laser beam and a test recording and a function of recording a using a pulse train. The magneto-optical disk has a laminated layer structure capable of obtaining a high S/N ratio and stabilizing a heat conduction. The magneto-optical disk drive with the recorded domain shape control function using a short wavelength laser beam and a test recording and with the pulse train recording record function is organically coupled with the magneto-optical disk having the laminated layer structure with a stabilized heat conduction to make the disk and the disk drive have an integrity therebetween, providing a magneto-optical disk having a recording capacity four times as large as the first generation magneto-optical disk system.

    摘要翻译： 磁光盘系统包括磁光盘和磁盘驱动器。 磁光盘驱动器通过使用短波长激光束和测试记录以及使用脉冲串记录功能来提供控制记录域的形状的功能。 磁光盘具有能够获得高S / N比并稳定热传导的叠层结构。 具有使用短波长激光束和测试记录并具有脉冲串记录记录功能的记录域形状控制功能的磁光盘驱动器与具有稳定的热传导的层叠层结构的磁光盘有机耦合 为了使盘和盘驱动器之间具有完整性，提供具有与第一代磁光盘系统相同的四倍的记录容量的磁光盘。

    Light modulation method for forming a mark in magneto-optical recording system
    7.
    发明授权
    Light modulation method for forming a mark in magneto-optical recording system 失效
    用于在磁光记录系统中形成标记的光调制方法

    公开(公告)号：US5457666A

    公开(公告)日：1995-10-10

    申请号：US114062

    申请日：1993-08-31

    申请人： Tsuyoshi Toda ,  Hiroshi Ide ,  Fumiyoshi Kirino ,  Takeshi Maeda ,  Hiroyuki Tsuchinaga ,  Toshimitsu Kaku ,  Seiichi Mita ,  Kazuo Shigematsu

    发明人： Tsuyoshi Toda ,  Hiroshi Ide ,  Fumiyoshi Kirino ,  Takeshi Maeda ,  Hiroyuki Tsuchinaga ,  Toshimitsu Kaku ,  Seiichi Mita ,  Kazuo Shigematsu

    IPC分类号： G11B7/00 ,  G11B7/0045 ,  G11B7/0055 ,  G11B7/006 ,  G11B7/125 ,  G11B11/10 ,  G11B11/105 ,  G11B7/24

    CPC分类号： G11B7/126 ,  G11B11/10506 ,  G11B11/1053 ,  G11B7/0045 ,  G11B7/006

    摘要： A magneto-optical disk recording control method using the mark length recording method wherein the marks and gap regions between marks are recorded on the surface of the disk by maintaining a constant temperature distribution during the recording. The laser is driven to a non-recording level in gap regions between marks that exceed a base recording level used for reproduction of the marks. When a mark is recorded, the laser power is increased to a recording power level and after the mark has been recorded, the laser power level is reduced to the base power level, followed by being raised to the gap recording level. Control of the laser is performed by superposing a plurality of pulse trains that are synchronized with respect to a clock having a cycle T. The pulse trains are derived from the code train to be recorded and have pulses with a duration that is an integral multiple of (1/2)T. If the pulse width of the recording code train exceeds 2T, then the laser is controlled to reach a first power level in accordance with pulses of a first pulse train, be reduced to the gap recording level and then raised to a second power level in accordance with a second recording pulse train to maintain the temperature distribution constant during the recording of the mark. For the recording of longer marks, the laser is controlled to vary between the second power level and the gap recording level.

    摘要翻译： 一种使用标记长度记录方法的磁光盘记录控制方法，其中通过在记录期间保持恒定的温度分布将标记之间的标记和间隙区域记录在盘的表面上。 在超过用于再现标记的基本记录水平的标记之间的间隙区域中激光被驱动到非记录水平。 当记录标记时，激光功率增加到记录功率水平，并且在记录标记之后，激光功率水平降低到基本功率水平，然后升高到间隙记录水平。 通过叠加相对于具有周期T的时钟同步的多个脉冲串来执行激光的控制。脉冲序列是从要被记录的代码序列导出的，具有持续时间为整数倍的脉冲 （1/2）T。 如果记录代码串的脉冲宽度超过2T，则根据第一脉冲序列的脉冲将激光器控制到达到第一功率电平，减小到间隙记录电平，然后依次升高到第二功率电平 具有第二记录脉冲串，以在记录记录期间保持温度分布恒定。 为了记录更长的标记，激光器被控制在第二功率电平和间隙记录电平之间变化。

    Calibration of reader/writer offset in hard disk drive using shingled recording
    10.
    发明授权
    Calibration of reader/writer offset in hard disk drive using shingled recording 失效
    硬盘驱动器中读写器偏移校准

    公开(公告)号：US07440221B2

    公开(公告)日：2008-10-21

    申请号：US11497975

    申请日：2006-08-01

    申请人： Hiroyuki Tsuchinaga ,  Terumi Takashi

    发明人： Hiroyuki Tsuchinaga ,  Terumi Takashi

    IPC分类号： G11B5/58

    CPC分类号： G11B5/5534

    摘要： Embodiments of the invention provide a disk drive that is capable of determining the offset of a magnetic head position through simple and easy processing in a case where the shingle write method is adopted, and that is capable of increasing the accuracy. In one embodiment, a disk drive comprises: a recording medium including data tracks, each of which is formed with part of the data track being overwritten by an adjacent data track on the inner circumferential side or by an adjacent data track on the outer circumferential side; a head assembly including a write head for writing information to the recording medium, and a read head for reading out information from the recording medium; and a control device for controlling a position of the head assembly relative to the recording medium. Position-error detection signals whose phases differ from each other are repeatedly written to the recording medium in the track direction with written positions of the position-error detection signals being deviated from each other by a track pitch in the track width direction; and the control device controls a position of the head assembly on the basis of a burst signal read by the read head.

    摘要翻译： 本发明的实施例提供一种磁盘驱动器，其能够通过在采用瓦兹写入方法的情况下通过简单且容易的处理来确定磁头位置的偏移，并且能够提高精度。 在一个实施例中，磁盘驱动器包括：包括数据磁道的记录介质，每个记录介质形成有数据磁道的一部分被内周侧的相邻数据磁道或外周侧的相邻数据磁道覆盖 ; 包括用于将信息写入记录介质的写入头的头组件和用于从记录介质读出信息的读头; 以及用于控制头组件相对于记录介质的位置的控制装置。 相位不同的位置误差检测信号在轨迹方向被重复地写入到记录介质上，其中位置误差检测信号的写入位置在轨道宽度方向上彼此偏离轨道间距; 并且控制装置基于由读取头读取的突发信号来控制头部组件的位置。