公开(公告)号：US07024617B2

公开(公告)日：2006-04-04

申请号：US10206211

申请日：2002-07-29

申请人： Hideki Sawaguchi ,  Yasutaka Nishida ,  Masafumi Mochizuki ,  Hiroyuki Tsuchinaga

发明人： Hideki Sawaguchi ,  Yasutaka Nishida ,  Masafumi Mochizuki ,  Hiroyuki Tsuchinaga

IPC分类号： H03M13/03

CPC分类号： G11B20/10055 ,  G11B5/012 ,  G11B5/09 ,  G11B20/1403 ,  G11B20/18

摘要： In a partial-response maximum-likelihood (PRML) signal detection and processing technique, reduction of data detection error events caused due to medium noise is achieved. For a PRML detection data result obtained after PRML data demodulation, a code error event that depends on a signal distance, and which has a high frequency of occurrences, is noticed and its occurrence probability is estimated. A locally-existing medium noise quantity is estimated from preceding and subsequent code patterns of the PRML detection data result. Based on this, the occurrence probability of the error event is compensated to improve the detection precision. As a result, data modulation with reliability higher than conventional maximum likelihood detection can be realized with a simple circuit structure.

摘要翻译： 在部分响应最大似然（PRML）信号检测和处理技术中，实现了由于中等噪声引起的数据检测误差事件的减少。 对于在PRML数据解调之后获得的PRML检测数据结果，注意到取决于信号距离并且具有高频率出现的代码错误事件，并且估计其发生概率。 根据PRML检测数据结果的前后代码模式估计本地存在的中等噪声量。 基于此，对误差事件的发生概率进行补偿，提高检测精度。 结果，可以通过简单的电路结构实现具有高于常规最大似然检测的可靠性的数据调制。

公开(公告)号：US06654325B1

公开(公告)日：2003-11-25

申请号：US09914427

申请日：2001-11-29

申请人： Hiroyuki Minemura ,  Hiroyuki Tsuchinaga

发明人： Hiroyuki Minemura ,  Hiroyuki Tsuchinaga

IPC分类号： G11B700

CPC分类号： G11B7/1267 ,  G11B7/0045 ,  G11B7/00454 ,  G11B7/006 ,  G11B7/126

摘要： A method of recording information on an information medium, especially on an optical recording medium with light. It has been hard to determine optimum power accurately due to the influence of the linearity and the mark length dependence on rewrite deterioration when a write parameter calibration on a phase change optical disk is performed by a conventional asymmetry method prior to information recording. According to the present invention, a single pattern or a random pattern is recorded on an information medium, and the difference between the clock and the data edge is detected using a reproduced signal. On the basis of this difference, the threshold power of the recording is determined and multiplied by a constant to optimize the recording power.

摘要翻译： 一种在信息介质上记录信息的方法，特别是在具有光的光记录介质上。 在信息记录之前，通过传统的不对称方法进行相变光盘上的写入参数校准时，由于线性和标记长度对重写劣化的影响，难以准确地确定最佳功率。 根据本发明，在信息介质上记录单个图案或随机图案，并且使用再现信号来检测时钟与数据边缘之间的差异。 基于该差异，确定记录的阈值功率并乘以常数以优化记录功率。

公开(公告)号：US4970707A

公开(公告)日：1990-11-13

申请号：US239389

申请日：1988-09-01

申请人： Fumio Hara ,  Yoshito Tsunoda ,  Shigeru Nakamura ,  Yoshizumi Eto ,  Seiichi Mita ,  Morishi Izumita ,  Hiroyuki Tsuchinaga ,  Masuo Kasai

发明人： Fumio Hara ,  Yoshito Tsunoda ,  Shigeru Nakamura ,  Yoshizumi Eto ,  Seiichi Mita ,  Morishi Izumita ,  Hiroyuki Tsuchinaga ,  Masuo Kasai

IPC分类号： G11B7/003 ,  G11B7/09

CPC分类号： G11B7/09 ,  G11B7/0031 ,  G11B7/0925

摘要： An optical tape apparatus having improved focus and tracking control. An optical head records, reproduces, or rewrites data on an optical tape by helically scanning the tape with a laser beam. A guide plate is disposed between the optical head and the tape to prevent the beam from becoming unfocused due to fluctuation of the tape cuased by an air film between the optical head and the tape. The optical head contains a semiconductor laser and an optical system exhibiting chromatic aberration for directing the laser beam onto the tape. The optical system includes a condenser lens for focusing the beam onto the tape. Fine focus control is achieved by changing the wavelength of the laser beam by directing part of the beam reflected from the tape back to the laser, thereby changing the focal point of the beam by virtue of the chromatic aberration of the optical system. Coarse focus control is achieved by mounting the condenser lens on a piezoelectric actuator which moves the consenser lens to focus the beam onto the tape. A recording head for recording timing marks and tracking signals on the tape is disposed in advance of the optical head. A reading head reads the timing marks and the optical head reads the tracking signals. The timing marks and tracking signals are used to control the operation of the apparatus such that the tape is transported with a constant speed and data on diagonal signal tracks on the tape is accurately recorded, reproduced, or rewritten.

摘要翻译： 具有改进的聚焦和跟踪控制的光带装置。 光学头通过用激光束螺旋扫描磁带来记录，再现或重写光学带上的数据。 引导板设置在光头和带之间，以防止由于光头和带之间的空气膜带来的带的波动而导致光束不聚焦。 光头包含半导体激光器和具有用于将激光束引导到带上的色差的光学系统。 光学系统包括用于将光束聚焦到胶带上的聚光透镜。 通过将从带反射的光束的一部分引回到激光器来改变激光束的波长，从而通过光学系统的色差来改变光束的焦点来实现精细对焦控制。 通过将聚光透镜安装在压电致动器上来实现粗调焦控制，该压电致动器移动辅助透镜以将光束聚焦到带上。 在光学头之前设置用于在带上记录定时标记和跟踪信号的记录头。 读头读取定时标记，光头读取跟踪信号。 定时标记和跟踪信号用于控制装置的操作，使得磁带以恒定速度传送，并且磁带上对角线信号轨道上的数据被精确地记录，再现或重写。

公开(公告)号：US20110013306A1

公开(公告)日：2011-01-20

申请号：US12923307

申请日：2010-09-14

申请人： Hideki Sawaguchi ,  Yasutaka Nishida ,  Hisashi Takano ,  Hiroyuki Tsuchinaga

发明人： Hideki Sawaguchi ,  Yasutaka Nishida ,  Hisashi Takano ,  Hiroyuki Tsuchinaga

IPC分类号： G11B5/09

CPC分类号： G11B20/10009 ,  G11B5/09 ,  G11B20/10203 ,  G11B2005/0016 ,  G11B2005/0029

摘要： To effectively suppress a signal in a low frequency region in which the medium noise and the signal distortion are concentrated, and in order to effectively utilize a detected component of the reproduced signal in the low frequency region, a target of partial response equalization to the perpendicularly recorded/reproduced signal is set so that the low-frequency component around the direct current is suppressed to a regulated quantity for both the effective suppression and the effective utilization. Accordingly, a maximum-likelihood decoding process is carried out through the target of partial response equalization. Reliability of data detection is made higher and a signal-to-noise ratio is improved, so that the noise from the recording medium can be reduced more and it is possible to provide a high-density magnetic recording/reproducing apparatus.

摘要翻译： 为了有效地抑制中等噪声和信号失真集中的低频区域中的信号，为了有效地利用低频区域中的再现信号的检测分量，将垂直方向的部分响应均衡的目标 记录再现信号被设定为使得直流电流周围的低频分量被抑制到有效抑制和有效利用两者的规定量。 因此，通过部分响应均衡的目标来执行最大似然解码处理。 数据检测的可靠性进一步提高，信噪比得到改善，从而可以进一步降低来自记录介质的噪声，并且可以提供高密度的磁记录/重放装置。

公开(公告)号：US07612960B2

公开(公告)日：2009-11-03

申请号：US11271365

申请日：2005-11-09

申请人： Naoki Satoh ,  Terumi Takashi ,  Hitoshi Ogawa ,  Hiroyuki Tsuchinaga

发明人： Naoki Satoh ,  Terumi Takashi ,  Hitoshi Ogawa ,  Hiroyuki Tsuchinaga

IPC分类号： G11B5/09

CPC分类号： G11B20/1217 ,  G06F3/0619 ,  G06F3/064 ,  G06F3/0676 ,  G11B2020/1222 ,  G11B2020/1232 ,  G11B2020/1277 ,  G11B2020/1292 ,  G11B2220/2516

摘要： Embodiments of the present invention efficiently format long sectors, without decreasing the performance, in a magnetic disk drive in which servo sectors are radially formed at regular intervals, and make full use of the ECC performance that is enhanced by the long sectors. In one embodiment, a data format in each zone on a magnetic disk is completed by a plurality of tracks N (N is an integer, which is 2 or more). The storage capacity per track of the outermost radius zone Z#1 is 150 kB. In this zone, long sectors each having a length of 32 kB are formatted with the number of tracks per format N#1=3. The storage capacity per track of the innermost radius zone Z#m is 80 kB. In this zone, long sectors each having a length of 32 kB are formatted with the number of tracks per format N#m=2.

摘要翻译： 本发明的实施例在不降低性能的情况下有效地格式化长周期的磁盘驱动器，其中伺服扇区以规则的间隔径向形成，并充分利用由长扇区增强的ECC性能。 在一个实施例中，磁盘上每个区域中的数据格式由多个磁道N完成（N是2或更大的整数）。 最外半径区Z＃1的轨道的存储容量为150kB。 在该区域中，长度为32kB的长扇区被格式化为每个格式N＃1 = 3的轨道数。 最里面的半径区域Z＃m的轨道的存储容量为80kB。 在该区域中，长度为32kB的长扇区用每个格式N＃m = 2的轨道数进行格式化。

公开(公告)号：US06785074B2

公开(公告)日：2004-08-31

申请号：US10038833

申请日：2002-01-08

申请人： Hiroyuki Tsuchinaga

发明人： Hiroyuki Tsuchinaga

IPC分类号： G11B509

CPC分类号： G11B20/10101 ,  G11B5/012 ,  G11B5/09 ,  G11B20/10009 ,  G11B20/22 ,  G11B27/3027 ,  G11B2005/001 ,  G11B2220/20 ,  H03L7/091

摘要： When jitter-like noise is prominent, sampling-phase control and amplitude control in a preamble pattern region is affected. It is possible to reduce effects of jitter-like noise without increasing the length of the preamble pattern. By altering a preamble pattern from that of a conventional 4T-cycle to 6T-cycle or over, amplitude data at a peak point of a reproduced signal, which is less affected by jitter-like noise, is utilized. Thus, the stability of the amplitude control can be improved. As to the phase control, a shift of the sampling timing is estimated by sample data of one cycle of the preamble pattern, and an acquisition procedure of the timing control is made faster.

摘要翻译： 当抖动样噪声突出时，前导码模式区域中的采样相位控制和幅度控制受到影响。 可以减少类似抖动的噪声的影响，而不增加前导码模式的长度。 通过将前导码模式从常规4T周期改变为6T周期或以上，利用较少受抖动噪声影响的再现信号的峰值点处的幅度数据。 因此，可以提高幅度控制的稳定性。 对于相位控制，通过前导码模式的一个周期的采样数据来估计采样定时的移位，并且更快地进行定时控制的获取过程。

公开(公告)号：US06477131B1

公开(公告)日：2002-11-05

申请号：US09461407

申请日：1999-12-15

申请人： Hiroyuki Tsuchinaga ,  Hiroyuki Minemura

发明人： Hiroyuki Tsuchinaga ,  Hiroyuki Minemura

IPC分类号： G11B700

CPC分类号： G11B20/10009 ,  G11B7/005 ,  G11B7/0053 ,  G11B11/10595 ,  G11B20/10027 ,  G11B2220/2537

摘要： An optical disk device including a head amplifier for recording/reproducing a signal onto/from a disk. In DVD-RAM disks, the signal level differs depending on whether the section is the PID area or the data field. The highest level in the PID area is a mirror level, whereas the highest level in the data field is a land/groove level. The gain of the head amplifier is limited so that the mirror level will not exceed the dynamic range of the head amplifier. Therefore, the head amplifier needs to assure a sufficient signal quality and send such a signal to a subsequent processing circuit. The signal is amplified with different suitable gains respectively for the PID area and the data field. Or an offset voltage corresponding to a difference between the mirror level and the land/groove level is applied to the PID area. As a result, the gain for the signal of the data field can be increased.

摘要翻译： 一种光盘装置，包括用于在/从盘上记录/再现信号的头放大器。 在DVD-RAM磁盘中，信号电平根据该部分是PID区域还是数据字段而有所不同。 PID区域的最高级别是镜像级别，而数据字段中的最高级别是一个级别/级别。 前置放大器的增益受到限制，因此镜面电平不会超过磁头放大器的动态范围。 因此，头放大器需要确保足够的信号质量并将这样的信号发送到随后的处理电路。 对于PID区域和数据区域，信号分别用不同的适当增益放大。 或者将对应于镜面电平和纹间/凹槽电平之间的差的偏移电压施加到PID区域。 结果，可以增加数据场的信号的增益。

公开(公告)号：US07372656B2

公开(公告)日：2008-05-13

申请号：US11404978

申请日：2006-04-13

申请人： Naoki Satoh ,  Hiroyuki Tsuchinaga ,  Terumi Takashi

发明人： Naoki Satoh ,  Hiroyuki Tsuchinaga ,  Terumi Takashi

IPC分类号： G11B15/18

CPC分类号： G11B5/59633 ,  G11B5/012 ,  G11B2005/0029

摘要： Embodiments of the invention provide a disk drive that is capable of effectively controlling a side erase, which is one of the problems with the use of the perpendicular recording technology. In one embodiment, tracks on a recording medium are formed concentrically or spirally by overwriting a primary side track, which is either an inner track or outer track, onto part of a secondary side track, which is on the side away from the primary side track. A head unit is installed so that a magnetic head positioned at one end of the head unit relatively may move over the recording medium and that the yaw angle prevailing at an end track of the primary side on the recording medium may be substantially zero.

摘要翻译： 本发明的实施例提供一种能够有效地控制侧面擦除的盘驱动器，这是使用垂直记录技术的问题之一。 在一个实施例中，记录介质上的轨道通过将作为内轨道或外轨道的一次侧轨道覆盖在远离初级侧轨道的一侧的次级侧轨道的一部分上而同心地或螺旋形地形成 。 安装头单元，使得位于头单元的一端的磁头相对可以在记录介质上移动，并且在记录介质上的初级侧的终端轨道处的偏航角度可以基本上为零。

公开(公告)号：US07142379B2

公开(公告)日：2006-11-28

申请号：US10924815

申请日：2004-08-25

申请人： Hiroyuki Tsuchinaga

发明人： Hiroyuki Tsuchinaga

IPC分类号： G11B5/09 ,  G11B20/10

CPC分类号： G11B20/10101 ,  G11B5/012 ,  G11B5/09 ,  G11B20/10009 ,  G11B20/22 ,  G11B27/3027 ,  G11B2005/001 ,  G11B2220/20 ,  H03L7/091

摘要： A magnetic recording system having a magnetic-recording medium with data sectors wherein a preamble pattern of a prescribed cycle is recorded, the preamble pattern having the cycle of a predetermined T, wherein T represents a minimum duration of a data-recorded bits in the data sectors. The system includes a magnetic head to reproduce the preamble pattern and a signal-processing circuit to process data to be recorded in and reproduced from the data sectors. The signal-processing circuit including (i) a sampler for sampling a signal reproduced from the preamble pattern and (ii) a corrector for correcting the amplitude by using maximum and minimum amplitude values in each cycle of the preamble pattern sampled by the sampler.

摘要翻译： 一种磁记录系统，具有具有数据扇区的磁记录介质，其中记录了规定周期的前同步码模式，前同步码模式具有预定T的周期，其中T表示数据中的数据记录位的最小持续时间 部门。 该系统包括用于再现前导码模式的磁头和用于处理将被记录在数据扇区中并从数据扇区再现的数据的信号处理电路。 信号处理电路包括：（i）采样器，用于对从前置码模式再现的信号进行采样;以及（ii）校正器，用于通过采样器采样的前导码模式的每个周期中使用最大和最小振幅值来校正振幅。

公开(公告)号：US20050018337A1

公开(公告)日：2005-01-27

申请号：US10924815

申请日：2004-08-25

申请人： Hiroyuki Tsuchinaga

发明人： Hiroyuki Tsuchinaga

IPC分类号： G11B20/14 ,  G11B5/00 ,  G11B5/012 ,  G11B5/09 ,  G11B20/10 ,  G11B20/12 ,  G11B20/22 ,  G11B27/30 ,  H03L7/091

CPC分类号： G11B20/10101 ,  G11B5/012 ,  G11B5/09 ,  G11B20/10009 ,  G11B20/22 ,  G11B27/3027 ,  G11B2005/001 ,  G11B2220/20 ,  H03L7/091

摘要： A magnetic recording system having a magnetic-recording medium with data sectors wherein a preamble pattern of a prescribed cycle is recorded, the preamble pattern having the cycle of a predetermined T, wherein T represents a minimum duration of a data-recorded bits in the data sectors. The system includes a magnetic head to reproduce the preamble pattern and a signal-processing circuit to process data to be recorded in and reproduced from the data sectors. The signal-processing circuit including (i) a sampler for sampling a signal reproduced from the preamble pattern and (ii) a corrector for correcting the amplitude by using maximum and minimum amplitude values in each cycle of the preamble pattern sampled by the sampler.

摘要翻译： 一种磁记录系统，具有具有数据扇区的磁记录介质，其中记录了规定周期的前同步码模式，前同步码模式具有预定T的周期，其中T表示数据中的数据记录位的最小持续时间 部门。 该系统包括用于再现前导码模式的磁头和用于处理将被记录在数据扇区中并从数据扇区再现的数据的信号处理电路。 信号处理电路包括：（i）采样器，用于对从前置码模式再现的信号进行采样;以及（ii）校正器，用于通过采样器采样的前导码模式的每个周期中使用最大和最小振幅值来校正振幅。