公开(公告)号：WO1997017697A1

公开(公告)日：1997-05-15

申请号：PCT/IB1996001166

申请日：1996-10-30

Applicant: PHILIPS ELECTRONICS N.V. ,  PHILIPS NORDEN AB

Inventor： PHILIPS ELECTRONICS N.V. ,  PHILIPS NORDEN AB ,  HOOGENDOORN, Abraham ,  ROOS, Willem, Arie ,  KALFS, Johannes, Jozef, Wilhelmus

IPC: G11B05/09

CPC classification number: G11B20/10009 ,  G11B5/09

Abstract: A method and an apparatus are disclosed for recording a binary signal onto a magnetic record carrier (45). The binary signal is supplied to an input terminal (30). The apparatus comprise generators (38.1 to 38.4) for generating at least two write pulses (P1, P2) for each bit of the binary signal to be written. More specifically, the generators are adapted to (i) generate at least two write pulses of a third polarity (P1, P2) for the first bit of the first polarity in the first sequence, (ii) generating a write pulse of the third polarity and a write pulse of a fourth polarity (P3, P4) for the at least second bit of the first polarity occurring in the first sequence, the third polarity being opposite to the fourth polarity, (iii) generating at least two write pulses of the fourth polarity (P7, P8) for the first bit of the second polarity in the second sequence, (iv) generating a write pulse of the third polarity and a write pulse of the fourth polarity (P3', P4') for the at least second bit of the second polarity occurring in the second sequence.

Abstract translation: 公开了一种用于将二进制信号记录到磁记录载体（45）上的方法和装置。 二进制信号被提供给输入端（30）。 该装置包括用于为待写入的二进制信号的每一位产生至少两个写入脉冲（P1，P2）的发生器（38.1至38.4）。 更具体地，发生器适于（i）在第一序列中产生用于第一极性的第一位的第三极性（P1，P2）的至少两个写入脉冲，（ii）产生第三极性的写入脉冲 以及第一极性的至少第二位的第四极性的写入脉冲（P3，P4），第三极性与第四极性相反，（iii）产生至少两个写入脉冲 第二极性的第一极性的第四极性（P7，P8），（iv）至少产生第三极性的写入脉冲和第四极性的写入脉冲（P3'，P4'） 第二极性的第二位出现在第二序列中。

公开(公告)号：WO1997007501A1

公开(公告)日：1997-02-27

申请号：PCT/US1996013083

申请日：1996-08-08

Applicant: QUANTUM CORPORATION

Inventor： QUANTUM CORPORATION ,  ZIPEROVICH, Pablo, A.

IPC: G11B05/09

CPC classification number: H04L25/063 ,  G11B5/012 ,  G11B5/09 ,  G11B5/59627 ,  G11B20/10009 ,  G11B20/1403 ,  G11B20/1426 ,  G11B2020/1282 ,  H04L7/0334

Abstract: A power reduced digital control (46) within a feedback control loop of a sampling data detection channel controls a predetermined operating parameter of the channel in which an analog to digital converter (26) provides digital samples of information in the channel at a predetermined channel clock rate. The digital control (46) comprises a parameter error extraction circuit receiving digital samples from the analog to digital converter (26), and extracting parameter error values from the digital samples; a circuit for averaging the extracted parameter error values over an integral submultiple of the clock rate; and a parameter error processing circuit connected to the parameter error extraction circuit and clocked at the integral submultiple for generating digital control values within the feedback control loop.

Abstract translation: 在采样数据检测通道的反馈控制环路内的功率减小数字控制（46）控制信道的预定操作参数，其中模数转换器（26）以预定信道时钟在信道中提供信息的数字采样 率。 数字控制（46）包括从模数转换器（26）接收数字样本的参数误差提取电路，并从数字样本中提取参数误差值; 用于对所提取的参数误差值在时钟速率的整数倍数上进行平均的电路; 以及参数误差处理电路，连接到参数误差提取电路，并在积分微分时钟，用于在反馈控制环路内产生数字控制值。

公开(公告)号：WO1996035209A1

公开(公告)日：1996-11-07

申请号：PCT/JP1996001196

申请日：1996-05-01

Applicant: SONY CORPORATION ,  SHITARA, Teruyuki

Inventor： SONY CORPORATION

IPC: G11B05/09

CPC classification number: G11B20/1879 ,  G11B20/1209 ,  G11B27/323 ,  G11B27/328 ,  G11B27/36 ,  G11B2020/183

Abstract: Data in a management region of a tape are reliably restored by a retry processing even when a read error occurs due to scratches on the tape. A physical ID with an initial value of 4000ID from PBOT is set to -1600ID (Fig. 19A) after normal VSIT write, to -1700ID after the first retry (Fig. 19B) and to -1800ID after the second retry (Fig 19C), and it decreases by 100ID after each retry. In contrast, VSIT is always written from 0ID. In this way, in the retry processing of VSIT, the physical ID of the start position does not change, and the actual write position, that is, the distance from PBOT, can be changed. Therefore, even when the error of VSIT write occurs due to scratches of the tape, for example, the VSIT write error can be restored by this retry processing.

Abstract translation: 即使由于磁带上的划痕而发生读取错误，也可以通过重试处理可靠地恢复磁带的管理区域中的数据。 来自PBOT的初始值为4000ID的物理ID在正常VSIT写入之后被设置为-1600ID（图19A），在第一次重试之后被设置为-1700ID（图19B），并且在第二次重试之后变为-1800ID（图19C） ，每次重试后减少100ID。 相比之下，VSIT始终是从0ID写的。 以这种方式，在VSIT的重试处理中，开始位置的物理ID不改变，实际的写入位置，即与PBOT的距离可以改变。 因此，即使由于磁带的划痕而发生VSIT写入的错误，例如，可以通过该重试处理来恢复VSIT写入错误。

公开(公告)号：WO1995022821A1

公开(公告)日：1995-08-24

申请号：PCT/US1995002003

申请日：1995-02-17

Applicant: MAXTOR CORPORATION

Inventor： MAXTOR CORPORATION ,  MATHEWS, Harlan, P. ,  GERCKEN, Robert, E. ,  ADCOCK, Patrick, L.

IPC: G11B05/09

CPC classification number: G11B5/09 ,  G11B20/10009

Abstract: A differentiating qualifier channel in a hard disk drive is disclosed. The analog signal read off a magnetic disk by the transducer is amplified and filtered, then immediately differentiated (201). This differentiated waveform is used both to qualify (202) and to detect (205) the peaks of the analog read signal. Data pulses are qualified (202) by noting that the differentiated waveform always changes polarity (203) after the zero crossing of a valid peak. Positive and negative peak signals are generated whenever the differentiated waveform exceeds (203) positive and negative thresholds. From this, a polarity signal is constructed (204). The pulses, indicating where the polarity signal changes state, are used to enable a latch (208). The latch (208) is clocked by a zero crossing signal (206) which has been delayed (207) such that the zero crossings occur after the change in polarity. The output from this latch (208) gives the valid qualified data pulses.

Abstract translation: 公开了一种在硬盘驱动器中的区分限定符通道。 由传感器读出磁盘的模拟信号被放大并过滤，然后立即区分（201）。 该差分波形用于限定（202）和检测（205）模拟读取信号的峰值。 通过注意到有效峰过零后，微分波形总是改变极性（203），对数据脉冲进行限定（202）。 每当差分波形超过（203）正和负阈值时，产生正和负峰值信号。 由此构成极性信号（204）。 指示极性信号改变状态的脉冲用于启用锁存器（208）。 锁存器（208）由已被延迟（207）的过零信号（206）计时，使得在极性改变之后出现过零点。 该锁存器（208）的输出给出有效的合格数据脉冲。

公开(公告)号：WO1994027287A1

公开(公告)日：1994-11-24

申请号：PCT/JP1994000793

申请日：1994-05-17

Applicant: SONY CORPORATION ,  TANAKA, Shoji ,  TAKEDA, Toru

Inventor： SONY CORPORATION

IPC: G11B05/09

CPC classification number: G11B27/3027 ,  G11B20/10 ,  G11B20/12 ,  G11B20/1403 ,  G11B2220/20

Abstract: Clock marks for extracting clock components are made in advance at regular intervals along the track of a discoid recording medium, and clock components are extracted by detecting these clock marks at the time of rotating the discoid recording medium. Since the clock components are extracted from the definitely and periodically arranged clock marks in such a way, and interpolating clocks in sections between clock marks are generated based on the extracted clock components, highly accurate clocks can be obtained as compared with the case where clocks are extracted from reproduced codes. Therefore, the capacity of the discoid recording medium can be remarkably increased.

Abstract translation: 用于提取时钟分量的时钟标记是沿着盘状记录介质的轨道以规则的间隔预先进行的，并且在旋转盘状记录介质时检测这些时钟标记来提取时钟分量。 由于以这样的方式从明确且周期性排列的时钟标记中提取时钟分量，并且基于所提取的时钟分量来生成在时钟标记之间的部分内插时钟，与时钟是 从复制代码中提取。 因此，可以显着提高盘状记录介质的容量。

公开(公告)号：WO1994023427A1

公开(公告)日：1994-10-13

申请号：PCT/US1994003657

申请日：1994-04-04

Applicant: CIRRUS LOGIC, INC.

Inventor： CIRRUS LOGIC, INC. ,  BEHRENS, Richard, T. ,  GLOVER, Neal ,  DUDLEY, Trent, O. ,  ARMSTRONG, Alan, J. ,  ZOOK, Christopher, P. ,  BLISS, William, G.

IPC: G11B05/09

CPC classification number: H03H17/06 ,  G11B5/09 ,  G11B20/10009 ,  H03H17/02

Abstract: A filter for compensating discrete secondary pulse formations associated with a data stream of discrete main pulses produced from data read from magnetic media. The filter's impulse response comprises a center coefficient with side compensating coefficients for attenuating the secondary pulses when the input signal is convolved with the impulse response. The magnitude and delay of the compensation coefficients are programmable and are adaptively adjusted to optimize the impulse response for a given environment. In a traditional FIR embodiment, two delay lines are used to generate the two programmable delays between the center coefficient and side compensation coefficients. In the preferred embodiment, an IIR filter (378, 373, 375, 377, 390, 396, 451, 453, 455, 459) provides the two programmable delays using only one delay line (390). Also in the preferred embodiment, the data stream is interleaved into an even and odd data stream and processed in parallel by two filters in order to double the throughput.

Abstract translation: 用于补偿与从磁介质读取的数据产生的离散主脉冲的数据流相关联的离散次级脉冲形成的滤波器。 滤波器的脉冲响应包括具有侧补偿系数的中心系数，用于当输入信号与脉冲响应卷积时衰减次级脉冲。 补偿系数的幅度和延迟可编程，并进行自适应调整，以优化给定环境的脉冲响应。 在传统的FIR实施例中，使用两条延迟线来产生中心系数和侧面补偿系数之间的两个可编程延迟。 在优选实施例中，IIR滤波器（378,373,375,377,390,396,451,453,455,459）仅使用一个延迟线（390）提供两个可编程延迟。 同样在优选实施例中，数据流被交织成偶数和奇数数据流，并且由两个滤波器并行处理，以使吞吐量翻倍。

公开(公告)号：WO1993018508A1

公开(公告)日：1993-09-16

申请号：PCT/US1993001836

申请日：1993-03-04

Applicant: GRUMMAN AEROSPACE CORPORATION

Inventor： GRUMMAN AEROSPACE CORPORATION ,  CURASI, Joseph, B. ,  WRIGHT, Frank, D.

IPC: G11B05/09

CPC classification number: G11B20/10 ,  G11B15/1875 ,  G11B27/002 ,  G11B27/10 ,  G11B27/36 ,  G11B2220/90 ,  G11B2220/913

Abstract: A system capable of synchronizing and automatically resynchronizing multiple DCRSi units includes a monitor (3) for monitoring respective channels output by each unit (X, Y, Z) for frame sync words which have been simultaneously inserted (8) into each unit (X, Y, Z) during recording. If the frame sync words are not present simultaneously, the sequence and magnitude of the offset is determined (3) and synchronization of the data output is adjusted by adding additional reads to the channels that slip behind.

公开(公告)号：WO1992009073A1

公开(公告)日：1992-05-29

申请号：PCT/JP1991000755

申请日：1991-06-05

Applicant: SONY CORPORATION ,  KANOTA, Keiji ,  INOUE, Hajime ,  UETAKE, Akihiro ,  KAWAGUCHI, Moriyuki ,  KUBOTA, Yukio ,  CHIBA, Kazunobu

Inventor： SONY CORPORATION

IPC: G11B05/09

CPC classification number: H04N9/8047 ,  G11B5/0086 ,  G11B5/09

Abstract: A device for recording digital picture signals has a circuit for converting the input digital picture signals into blocks of data comprising a plurality of picture element data, an encoding circuit which encodes the output of the converting circuit in compressed data for every block, and a channel-encoding circuit which channel-encodes the encoded data outputted from the encoding circuit. The data outputted from the channel-encoding circuit is recorded on a magnetic tape by magnetic heads installed on a rotating drum. In the device, the pitch of the tracks formed on the magnetic tape by the magnetic heads is 5.5 mu m or less, the diameter of the rotating drum is 25 mm or less, and the track length per unit time is made to be a predetermined one by setting the rotating speed of the rotating drum at 150 rps or more. Thereby, long recording time is possible by a mechanism part of a small size and further, the error relative to the linearity of the track can be reduced.

Abstract translation: 用于记录数字图像信号的装置具有用于将输入的数字图像信号转换为包括多个图像元素数据的数据块的电路，对每个块的压缩数据对转换电路的输出进行编码的编码电路和通道 编码电路，对编码电路输出的编码数据进行通道编码。 从通道编码电路输出的数据通过安装在转鼓上的磁头记录在磁带上。 在该装置中，通过磁头形成在磁带上的轨道的间距为5.5μm或更小，旋转滚筒的直径为25mm或更小，并且将每单位时间的轨迹长度设定为预定的 一个通过将旋转鼓的旋转速度设置在150rps或更大。 因此，通过小尺寸的机构部分可以实现长记录时间，并且可以减少相对于轨道的线性的误差。

公开(公告)号：WO1992007353A1

公开(公告)日：1992-04-30

申请号：PCT/JP1991001427

申请日：1991-10-18

Applicant: KABUSHIKI KAISHA CSK ,  NIHON CARD CENTER KABUSHIKI KAISHA ,  IZAWA, Shigeru

Inventor： KABUSHIKI KAISHA CSK ,  NIHON CARD CENTER KABUSHIKI KAISHA

IPC: G11B05/09

CPC classification number: G11B5/09 ,  G06K1/125 ,  G06K7/0163 ,  G06K7/083

Abstract: A magnetic read/write apparatus wherein a read coil (2a), a bias application coil (2b) and a write coil (2c) are provided to a magnetic head (1). The apparatus includes a detection unit for selectively detecting data of a magnetic recording medium and a read signal of a clock, a bias application unit for applying a bias magnetic field, switching units (9, 10) for switching the read coil (2a) and the bias application coil (2b), and an oscillator (11) for generating clock signals. The detection unit and the switching units (9, 10) are operated on a time division basis by the clock signals of the oscillator (11). In response to the clock signal read from the magnetic recording medium, data are read from and written to the magnetic recording medium on the time division basis. In this manner, magnetic data having different magnetization systems can be read and written by a single magnetic head, and the size of the apparatus can be reduced.

Abstract translation: 一种磁读/写装置，其中读磁盘（2a），偏压应用线圈（2b）和写线圈（2c）设置在磁头（1）上。 该装置包括用于选择性地检测磁记录介质的数据和时钟的读取信号的检测单元，用于施加偏置磁场的偏置施加单元，用于切换读取线圈（2a）的切换单元（9,10）和 偏置应用线圈（2b）和用于产生时钟信号的振荡器（11）。 检测单元和开关单元（9,10）通过振荡器（11）的时钟信号在时分的基础上操作。 响应于从磁记录介质读取的时钟信号，数据在时分基础上被读取并写入磁记录介质。 以这种方式，可以通过单个磁头读取和写入具有不同磁化系统的磁数据，并且可以减小装置的尺寸。

公开(公告)号：WO1991007744A1

公开(公告)日：1991-05-30

申请号：PCT/US1990006321

申请日：1990-11-09

Applicant: EXABYTE CORPORATION

Inventor： EXABYTE CORPORATION ,  ZOOK, Christopher ,  BORDASCH, Robert ,  GEORGIS, Steven, P. ,  ATAI-AZIMI, Alireza ,  PISCIOTTA, Christopher ,  HAUGLAND, Steve, E. ,  HUGHES, Timothy, C.

IPC: G11B05/09

CPC classification number: G11B20/1883 ,  G11B5/00865 ,  G11B5/09 ,  G11B20/1209 ,  G11B2020/183 ,  G11B2220/90

Abstract: A dual channel helical scan recording system (30) includes a rotating drum (36) having sets of heads (W1, W2, R1, R2) mounted on its peripheral surface (56). A set of write heads (W1, W2) is situated on an opposite side of the drum (36) from a set of read heads (R1, R2). The write heads (W1, W2) simultaneously write two adjacent tracks (T1, T2), which are read for verification 180 degrees later by corresponding read heads (R1, R2). The heads (W1, W2, R1, R2) are strategically mounted on the drum (36) with respect to angular and axial placement, and have selected head widths and azimuthal angles. Should a block of data (317) written to tape (32) be determined, during readback, to be a bad block, that bad block is subsequently rewritten on the tape (32) in the course of writing good blocks and amongst other good blocks. The rewritten block is recorded at a row position on the tape which is sufficiently displaced from the row position of a previous writing to avoid media defects occurring on the tape. In addition, a block written by a first write head (W1) and perceived as having been written as a bad block must be written by a second write head (W2) before that block is rewritten a predetermined number of times.

Abstract translation: 双通道螺旋扫描记录系统（30）包括具有安装在其外周表面（56）上的一组头（W1，W2，R1，R2）的旋转鼓（36）。 一组写头（W1，W2）位于鼓（36）的与一组读头（R1，R2）相反的一侧。 写入头（W1，W2）同时写入两个相邻的磁迹（T1，T2），它们被相应的读取头（R1，R2）180度后读取。 头部（W1，W2，R1，R2）相对于角度和轴向布置策略地安装在滚筒（36）上，并且具有选择的头部宽度和方位角。 如果写入磁带（32）的数据块（317）在回读期间被确定为坏块，那么在编写好的块和其它好的块之间随后在带（32）上重写该坏块 。 重写的块被记录在磁带上的行位置，该位置从先前写入的行位置充分移位，以避免在磁带上发生介质缺陷。 此外，由第一写入头（W1）写入并且被感知为被写入坏块的块必须在该块被重写预定次数之前由第二写入头（W2）写入。