公开(公告)号：US20060232874A1

公开(公告)日：2006-10-19

申请号：US11404156

申请日：2006-04-13

申请人： Hiroyuki Tsuchinaga ,  Naoki Satoh ,  Terumi Takashi

发明人： Hiroyuki Tsuchinaga ,  Naoki Satoh ,  Terumi Takashi

IPC分类号： G11B21/02

CPC分类号： G11B5/59633 ,  G11B5/012 ,  G11B20/1217 ,  G11B20/1258 ,  G11B2005/001 ,  G11B2020/1238 ,  G11B2020/1292 ,  G11B2020/1295 ,  G11B2020/1297 ,  G11B2220/2516

摘要： Embodiments of the invention provide a disk drive that is capable of enhancing the storage capacity increase ratio while reducing the processing load for read/write operations. In one embodiment, a disk drive comprises a recording medium and a control section. The recording medium includes concentric or spiral data tracks. Each of the data tracks is provided with a plurality of circumferentially arranged sectors. The control section receives instructions for writing into a plurality of sectors, rearranges the data to be written into each sector into groups of N pieces of write data, and writes the data into N data tracks.

公开(公告)号：US20060047898A1

公开(公告)日：2006-03-02

申请号：US11213319

申请日：2005-08-26

申请人： Yoshiteru Ishida ,  Hitoshi Ogawa ,  Terumi Takashi

发明人： Yoshiteru Ishida ,  Hitoshi Ogawa ,  Terumi Takashi

IPC分类号： G06F12/00

CPC分类号： G06F3/0637 ,  G06F3/0623 ,  G06F3/064 ,  G06F3/0652 ,  G06F3/0674 ,  G06F21/80 ,  G11B20/00086 ,  G11B20/00137 ,  G11B20/00615

摘要： Embodiment of the present invention provide a technique for carrying out work in a short time to prevent without fail data stored in a read/write device from leaking to persons other than an authorized user. There are provided a read/write device, and a format management method for managing a format of data stored in the read/write device. A given change factor is specified for a format of data stored in the read/write device. A format change judgment part for judging whether or not the change factor exists is provided in the read/write device or in a host device connected to the read/write device. Then, a given offset coefficient is generated for a format table according to an instruction from a format change judgment part, and a different format table is generated according to the generated offset coefficient and the format table.

摘要翻译： 本发明的实施例提供了一种用于在短时间内进行工作以防止存储在读/写装置中的数据泄漏给除了授权用户以外的人的技术。 提供了读/写设备和用于管理存储在读/写设备中的数据的格式的格式管理方法。 对于存储在读/写设备中的数据的格式指定给定的变化因子。 用于判断存在变化因素的格式变化判断部分是否被提供在读/写设备或连接到读/写设备的主设备中。 然后，根据来自格式变更判定部的指示，对于格式表生成给定的偏移系数，根据生成的偏移系数和格式表生成不同的格式表。

公开(公告)号：US06987635B2

公开(公告)日：2006-01-17

申请号：US10383056

申请日：2003-03-07

申请人： Kyo Akagi ,  Kouki Uefune ,  Naoki Satoh ,  Terumi Takashi ,  Atsushi Saito

发明人： Kyo Akagi ,  Kouki Uefune ,  Naoki Satoh ,  Terumi Takashi ,  Atsushi Saito

IPC分类号： G11B15/18

CPC分类号： G11B19/28 ,  G11B19/02

摘要： In a magnetic disk apparatus which is removably mounted or embedded to a host apparatus and intermittently accessed for recording/reproducing data, a RAM contained in the host apparatus is utilized for a portion or entirety of a buffer RAM for use in the intermittent access to accomplish a reduction in size and cost of the magnetic disk apparatus. In addition, the magnetic disk apparatus is controlled to rotate a magnetic disk at a variable rotational speed, and operated at a rotational speed at which the total power consumption is minimized in accordance with the capacity of the utilized buffer RAM and whether an access is made for recording or reproduction, thereby improving a power saving effect.

摘要翻译： 在可移动地安装或嵌入到主机设备中并间歇地访问用于记录/再现数据的磁盘装置中，包含在主机装置中的RAM用于间歇访问中使用的缓冲RAM的一部分或全部以完成 磁盘装置的尺寸和成本的减小。 此外，磁盘装置被控制成以可变转速旋转磁盘，并且以根据所使用的缓冲RAM的容量的总功耗最小化的转速进行操作，以及是否进行访问 用于记录或再现，从而提高节电效果。

公开(公告)号：US20050044468A1

公开(公告)日：2005-02-24

申请号：US10922227

申请日：2004-08-18

申请人： Morishi Izumita ,  Terumi Takashi ,  Hideki Sawaguchi ,  Seiichi Mita

发明人： Morishi Izumita ,  Terumi Takashi ,  Hideki Sawaguchi ,  Seiichi Mita

IPC分类号： G06F11/10 ,  G11B20/10 ,  G11B20/18 ,  H03M13/11 ,  H03M13/15 ,  H03M13/27 ,  H03M13/29 ,  H03M13/45 ,  H03M13/00 ,  G11C29/00

CPC分类号： H03M13/29 ,  G11B20/10009 ,  H03M13/1111 ,  H03M13/1191 ,  H03M13/1515 ,  H03M13/2703 ,  H03M13/3746 ,  H03M13/45 ,  H03M13/6343 ,  H03M13/6505

摘要： In one embodiment, a symbol error correction encoder effects block interleaving on recording data and thereafter performs first error correction encoding on the recording data. Next, a symbol error correction encoder performs encoding on the whole block. A reproducing processing circuit outputs likelihood information of respective bits. A first error correction decoder corrects a random error produced upon recording and reproduction, using the likelihood information. Since it is possible to make an improvement in performance with respect to the random error by repetitive decoding at this time, the post-correction data is returned to the reproducing processing circuit. After the completion of such repetitive processing, the data is digitized and subjected to an error correction in symbol unit by a hard determination, and outputted to a symbol error correction decoder.

摘要翻译： 在一个实施例中，符号纠错编码器在记录数据上实现块交错，并且此后对记录数据执行第一纠错编码。 接下来，符号纠错编码器对整个块执行编码。 再现处理电路输出各位的似然信息。 第一纠错解码器使用似然信息校正记录和再现时产生的随机误差。 由于此时可以通过重复解码对随机误差进行性能改善，所以后校正数据返回到再生处理电路。 在完成这样的重复处理之后，数据被数字化，并通过硬判断进行符号单位的纠错，并将其输出到符号纠错解码器。

公开(公告)号：US06728052B2

公开(公告)日：2004-04-27

申请号：US09888645

申请日：2001-06-26

申请人： Masaharu Kondo ,  Terumi Takashi

发明人： Masaharu Kondo ,  Terumi Takashi

IPC分类号： G11B509

CPC分类号： H03M13/132 ,  G11B5/012 ,  G11B20/1866 ,  H03M13/1515 ,  H03M13/1525 ,  H03M13/158

摘要： A recording/reproducing apparatus for recording in a recording medium the interleaved data with an error correcting code added thereto and reproducing the recorded data from the recording medium, wherein the error correcting coding process is performed using an elliptic code on a finite field GF(2m) where m is a positive integer.

摘要翻译： 一种记录/再现装置，用于在记录介质中记录具有添加到其中的纠错码的交织数据并从记录介质再现记录数据，其中使用有限域GF（2）上的椭圆码执行纠错编码处理 ）其中m是正整数。

公开(公告)号：US06400523B1

公开(公告)日：2002-06-04

申请号：US09838127

申请日：2001-04-20

申请人： Yukari Katayama ,  Hitoshi Ogawa ,  Motoyasu Tsunoda ,  Tsuneo Hirose ,  Akira Kojima ,  Eisaku Saiki ,  Yasunori Kaneda ,  Katsuhiro Tsuneta ,  Shoichi Miyazawa ,  Terumi Takashi

发明人： Yukari Katayama ,  Hitoshi Ogawa ,  Motoyasu Tsunoda ,  Tsuneo Hirose ,  Akira Kojima ,  Eisaku Saiki ,  Yasunori Kaneda ,  Katsuhiro Tsuneta ,  Shoichi Miyazawa ,  Terumi Takashi

IPC分类号： G11B5596

CPC分类号： G11B5/012 ,  G11B5/09 ,  G11B5/4886 ,  G11B19/04 ,  G11B20/1217 ,  G11B20/1833 ,  G11B27/3027 ,  G11B2020/1222 ,  G11B2020/1232 ,  G11B2020/1265 ,  G11B2020/1267 ,  G11B2020/1297 ,  G11B2220/20 ,  G11B2220/2516

摘要： A magnetic disk recording and reproducing apparatus comprising a unit for inserting an error correcting code related to control information into said control information on data; a recording control unit for recording in a plurality of sectors formed by dividing the recording area of a magnetic disk, each sector having an ID area for recording said control information and a data area, provided adjacent to and behind said ID area, for recording said data; and a error correcting unit for correcting said control information of said ID area by said error correcting code before data is read from said data area corresponding to said ID area or data is recorded in said data area corresponding to said ID area.

摘要翻译： 一种磁盘记录和再现装置，包括用于将与控制信息相关的纠错码插入到关于数据的所述控制信息中的单元; 记录控制单元，用于记录在通过划分磁盘的记录区域形成的多个扇区中，每个扇区具有用于记录所述控制信息的ID区域和与所述ID区域相邻并在其后面设置的用于记录所述控制信息的数据区域的数据区域， 数据; 以及纠错单元，用于在从与所述ID区域对应的所述数据区域读取数据之前通过所述纠错码校正所述ID区域的所述控制信息，或者将数据记录在与所述ID区域对应的所述数据区域中。

公开(公告)号：US5659309A

公开(公告)日：1997-08-19

申请号：US389773

申请日：1995-02-16

申请人： Terumi Takashi ,  Yasuhide Ouchi ,  Seiichi Mita ,  Akihiko Hirano ,  Naoki Satoh

发明人： Terumi Takashi ,  Yasuhide Ouchi ,  Seiichi Mita ,  Akihiko Hirano ,  Naoki Satoh

IPC分类号： G11B20/18 ,  G11B20/10 ,  H03M13/23 ,  H03M13/41 ,  H03M7/00

CPC分类号： H03M13/6343 ,  G11B20/10009 ,  H03M13/41

摘要： A data recording/reproducing apparatus and method therefor having a Viterbi decoder which stores operation result values of an inputted reproduced signal and the reference value when the peak value of the reproduced signal is updated, compares this value with the reproduced signal in amplitude, updates the stored value when the result satisfies the predetermined condition, detects a change in the polarity of the comparison result, controls the clock counter depending on the status of the peak value updating signal, sets 1 in the shift register at the position indicated by the counter according to the detected polarity inversion signal when the peak value is updated, and accordingly makes the updating and detecting operations independent of operations of addition and subtraction of the current reproduced signal and reference value and operations of addition and subtraction of amplitude comparison.

摘要翻译： 一种数据记录/再现装置和方法，其具有维特比解码器，其在再现信号的峰值被更新时存储输入的再现信号的运算结果值和参考值，将该值与振幅的再现信号进行比较，更新 当结果满足预定条件时，存储值检测比较结果的极性的变化，根据峰值更新信号的状态来控制时钟计数器，根据计数器指示的位置在移位寄存器中设置1 当更新峰值时检测到的极性反转信号，并且因此使得更新和检测操作与当前再现信号的加法和减法操作无关，参考值和幅度比较的相加和减法操作。

公开(公告)号：US5572157A

公开(公告)日：1996-11-05

申请号：US21854

申请日：1993-02-24

申请人： Terumi Takashi ,  Kazunori Iwabuchi ,  Minoru Kosuge ,  Hiromi Matsushige ,  Hideki Miyasaka

发明人： Terumi Takashi ,  Kazunori Iwabuchi ,  Minoru Kosuge ,  Hiromi Matsushige ,  Hideki Miyasaka

IPC分类号： H03K5/00 ,  H03L7/06 ,  H03L7/08 ,  H03L7/093 ,  H03L7/10 ,  H03L7/085

CPC分类号： H03L7/10 ,  H03L7/093

摘要： Count pulses CTP from a counter 15 are supplied to a phase detector 3 through a two-frequency-divider 17 to produce measurement data N.sub.1 representing a difference in phase from a synchronized peak pulses PK. In a subtractor 4, the measurement data N.sub.1 is compensated with error data Ne from a register 13 in order to reduce the number of steady-state phase errors. An internal phase error .DELTA.N produced by the subtractor 4 is supplied to an LPF 5, undergoing compensation processing in a digital filter 7 thereof. The LPF 5 also includes a phase compensator 6 and a period compensator 8 for compensating a control delay experience by the internal phase error .DELTA.N in the digital filter 7. An integer part OPD1 of counter oscillation period data OPD output by the LPF 5 is used for determining an oscillation period of a counter 15 whereas a fraction part OPD2 thereof is accumulated in a register 12 through an adder 11. An error accumulated in a register 12 is transferred to a register 13 and stored therein as error data Ne. Accordingly, the acquisition time is shortened and the number of steady-state errors is also reduced as well.

摘要翻译： 来自计数器15的计数脉冲CTP通过双分频器17被提供给相位检测器3，以产生表示与同步峰值脉冲PK相位相差的测量数据N1。 在减法器4中，为了减少稳态相位误差的数量，从寄存器13补偿测量数据N1的误差数据Ne。 由减法器4产生的内部相位误差DELTA N被提供给在其数字滤波器7中进行补偿处理的LPF5。 LPF5还包括相位补偿器6和周期补偿器8，用于通过数字滤波器7中的内相位误差DELTA N补偿控制延迟体验。使用由LPF 5输出的计数器振荡周期数据OPD的整数部分OPD1 用于确定计数器15的振荡周期，而其分数部分OPD2通过加法器11积累在寄存器12中。寄存器12中累积的误差被传送到寄存器13并作为误差数据Ne存储。 因此，采集时间缩短，稳态误差的数量也减少。

公开(公告)号：US08089717B1

公开(公告)日：2012-01-03

申请号：US09638607

申请日：2000-08-15

申请人： Terumi Takashi ,  Kazuhiko Satake

发明人： Terumi Takashi ,  Kazuhiko Satake

IPC分类号： G11B5/09

CPC分类号： G11B20/1217 ,  G11B20/10055 ,  G11B2020/1232 ,  G11B2020/1287 ,  G11B2020/1292 ,  G11B2220/2516

摘要： When the format control circuit detects bit synchronization information in a sector to be reproduced on a magnetic disk, the format control circuit activates a read gate signal for commanding to read out the sector from the magnetic disk. When symbol synchronization information on the magnetic disk is detected, a SYNC detection circuit produces a synchronization information detection signal. The format control circuit calculates an end position of the sector on the magnetic disk on the basis of the synchronization information detection signal to inactivate the read gate signal. The data correction circuit and the decoding circuit reproduce data and ECC in the sector read out from the magnetic disk during the period that the read gate signal is active on the basis of the synchronization information detection signal to produce the data and ECC to a data bus. The data flow control circuit processes the data and ECC on the data bus after the elapse of a reproduction delay time on the basis of the synchronization information detection circuit.

摘要翻译： 当格式控制电路检测要在磁盘上再现的扇区中的位同步信息时，格式控制电路激活用于命令从磁盘读出扇区的读门信号。 当检测到磁盘上的符号同步信息时，SYNC检测电路产生同步信息检测信号。 格式控制电路基于同步信息检测信号计算磁盘上的扇区的结束位置，以使读取门信号失活。 数据校正电路和解码电路根据同步信息检测信号，在读门信号有效期间从磁盘读出的扇区再现数据和ECC，以产生数据和ECC到数据总线 。 数据流控制电路在同步信息检测电路的基础上经过了再现延迟时间之后，在数据总线上处理数据和ECC。

公开(公告)号：US20110072232A1

公开(公告)日：2011-03-24

申请号：US12545788

申请日：2009-08-21

申请人： Yoshiju Watanabe ,  Toshio Kakihara ,  Koichi Arai ,  Terumi Takashi ,  Yuzo Nakagawa

发明人： Yoshiju Watanabe ,  Toshio Kakihara ,  Koichi Arai ,  Terumi Takashi ,  Yuzo Nakagawa

IPC分类号： G06F12/02

CPC分类号： G11B5/012 ,  G11B5/09 ,  G11B27/11 ,  G11B27/36 ,  G11B2220/2516

摘要： A method for writing data to a disk drive. The method includes: receiving a write command; and, determining whether a beginning and an end of a rewrite area specified by the write command agree with boundaries of large-sized data sectors on a disk. The method also includes: reading head and tail data sectors and making a backup of the head and tail data sectors in first and second non-volatile memory areas, respectively, if the beginning of the rewrite area does not agree with the boundaries. The method includes starting a rewrite of the rewrite area after completing backups into first and second non-volatile memory areas. Moreover, the method includes: determining a state stage by using data in first, second, third and fourth non-volatile memory areas if a power shut-down occurs during execution of the write command; and, executing a recovery process in accordance with the determined state stage.

摘要翻译： 一种将数据写入磁盘驱动器的方法。 该方法包括：接收写命令; 并且确定由写入命令指定的重写区域的开始和结束是否与盘上的大尺寸数据扇区的边界一致。 该方法还包括：如果重写区域的开始与边界不一致，则分别读取头部和尾部数据扇区并分别在第一和第二非易失性存储区域中备份头尾数据扇区。 该方法包括在完成对第一和第二非易失性存储器区域的备份之后重新开始重写区域的重写。 此外，该方法包括：如果在写入命令的执行期间发生电源关闭，则通过使用第一，第二，第三和第四非易失性存储器区域中的数据来确定状态级; 以及根据所确定的状态阶段执行恢复处理。