公开(公告)号：WO1997027581A1

公开(公告)日：1997-07-31

申请号：PCT/US1997001101

申请日：1997-01-24

Applicant: EXABYTE CORPORATION

Inventor： EXABYTE CORPORATION ,  AYERS, Mark, R.

IPC: G11B05/09

CPC classification number: G06F3/0601 ,  G06F3/0607 ,  G06F3/0613 ,  G06F3/0614 ,  G06F3/0619 ,  G06F3/0644 ,  G06F3/0655 ,  G06F3/0656 ,  G06F3/0682 ,  G11B5/00813 ,  G11B5/00817 ,  G11B5/0083 ,  G11B5/00878 ,  G11B5/00891 ,  G11B5/012 ,  G11B5/54 ,  G11B5/5508 ,  G11B5/584 ,  G11B5/5965 ,  G11B5/59688 ,  G11B5/78 ,  G11B5/86 ,  G11B15/026 ,  G11B15/04 ,  G11B15/05 ,  G11B15/06 ,  G11B15/087 ,  G11B15/1808 ,  G11B15/1875 ,  G11B15/52 ,  G11B20/00086 ,  G11B20/10 ,  G11B20/10527 ,  G11B20/1202 ,  G11B20/1204 ,  G11B20/1205 ,  G11B20/16 ,  G11B20/18 ,  G11B20/1879 ,  G11B20/1883 ,  G11B27/032 ,  G11B27/036 ,  G11B27/107 ,  G11B27/30 ,  G11B27/3018 ,  G11B27/3027 ,  G11B27/32 ,  G11B27/328 ,  G11B27/36 ,  G11B2020/1062 ,  G11B2020/10814 ,  G11B2020/1282 ,  G11B2220/216 ,  G11B2220/90 ,  G11B2220/916 ,  G11B2220/95 ,  H04N5/765 ,  H04N5/775 ,  H04N5/782 ,  H04N5/9261

Abstract: A magnetic tape drive (40) includes a write transfer channel and a read transfer channel which cause head(s) (100) to transduce data between the drive and a tape (32) at a transfer channel data rate. Relative motion of the tape and the head(s) occurs at a transport rate so that tracks are recorded on or reproduced from the tape. A tape speed controller (133) and variable clock controller (134) dynamically adjust the transfer channel data rate in accordance with the transport rate. Thus the recording of data on the tape and reading of data from the tape occurs at a rate which is related to the linear velocity of the tape.

Abstract translation: 磁带驱动器（40）包括写传输通道和读传输通道，其使头（100）以传送通道数据速率在驱动器和磁带（32）之间转换数据。 磁带和磁头的相对运动以传送速率发生，使得磁道被记录在磁带上或从磁带重现。 磁带速度控制器（133）和可变时钟控制器（134）根据传输速率动态地调整传输信道数据速率。 因此，磁带上的数据记录和数据从磁带的读取以与磁带的线速度相关的速率发生。

公开(公告)号：WO1997016822A1

公开(公告)日：1997-05-09

申请号：PCT/US1996016305

申请日：1996-10-11

Applicant: SYQUEST TECHNOLOGY, INC.

Inventor： SYQUEST TECHNOLOGY, INC. ,  WILSON, Rosser, S. ,  MAYO, Michael, J.

IPC: G11B05/09

CPC classification number: G11B5/59655 ,  G11B2020/1234

Abstract: A headerless, faul-tolerant sample-data servo pattern, comprising an alternating sequence of first and second servo sectors (300, 300'), with the first servo sectors each including a partial track address and circumferential orientation information (330), and the second servo sectors each including a full track address (335 and 340), provides an absolute indication of a read/write head's circumferential orientation along a given track on a magnetic disk which is robust in the presence of defects in the magnetic recording medium.

Abstract translation: 一种无头部，容错的采样数据伺服模式，包括第一和第二伺服扇区（300,300'）的交替序列，其中第一伺服扇区各自包括部分轨道地址和周向定向信息（330），并且 每个包括完整轨道地址（335和340）的第二伺服扇区提供读/写磁头的圆周方向的绝对指示，该磁头沿着在磁记录介质中存在缺陷的磁盘上的给定磁道。

公开(公告)号：WO1997015917A1

公开(公告)日：1997-05-01

申请号：PCT/US1996016084

申请日：1996-10-07

Applicant: QUANTUM CORPORATION

Inventor： QUANTUM CORPORATION ,  FISHER, Kevin, D. ,  BUCH, Bruce ,  LAU, Thomas ,  ZIPEROVICH, Pablo, O.

IPC: G11B05/09

CPC classification number: G11B20/10009 ,  G11B20/1258 ,  G11B20/1426

Abstract: The new method for overlapping block read events in a disk drive (10) having synchronously sampled data detection channels is presented. In particular, the new method is for overlapping read back processing by real-time and digital signal processing of first and second data blocks from a storage medium (12). The medium includes steps of clocking real-time (58) and digital signal processes (56) by a data transducer head, clocking the digital signal processes for the first data block by an asynchronous clock operating at a nominal data clocking rate after the first data block has passed by the data transducer head (16) and before a clock has synchronized to the second data block following the first data block, and clocking real-time signal processes for the second data block and completing clocking of the digital processes for the first data block by a clock synchronized to the second data block passing by the transducer head. The storage medium may be a magnetic hard disk, magnetic tape, or an optical disk, for example.

Abstract translation: 提出了一种在具有同步采样数据检测通道的磁盘驱动器（10）中重叠块读取事件的新方法。 特别地，新方法是通过来自存储介质（12）的第一和第二数据块的实时和数字信号处理来重叠读回处理。 介质包括通过数据传感器头对实时（58）和数字信号处理（56）​​进行计时的步骤，通过在第一数据之后以标称数据计时速率操作的异步时钟对第一数据块的数字信号处理进行计时 数据传输头（16）经过数据传输头（16）之前，时钟与第一数据块之后的第二数据块同步，并为第二数据块计时实时信号处理，并完成数字处理 数据块与通过换能器头的第二数据块同步的时钟。 存储介质可以是例如磁性硬盘，磁带或光盘。

公开(公告)号：WO1995015552A1

公开(公告)日：1995-06-08

申请号：PCT/US1994013826

申请日：1994-12-01

Applicant: MAXTOR CORPORATION

Inventor： MAXTOR CORPORATION ,  McNEIL, Michael ,  DAVIS, Andrew, W. ,  KOUDELE, Larry

IPC: G11B05/09

CPC classification number: G11B20/10481 ,  G11B5/09 ,  G11B20/10009 ,  G11B20/182 ,  G11B27/36

Abstract: Adaptive channel optimization in a disk drive is achieved by selecting a track of the recording medium and then writing a first data pattern to opposite sides of the selected track. The first data pattern (29a, 29b) is written a certain percentage of track (25a, 25b) in relation to the centerline (24) of the selected track. A second data pattern (30) is then written directly on the selected data track and the off track margin is determined as a function of how far the recording head can be positioned away from the center (24) of the selected track during reading of the second data pattern (30) while meeting a specified error rate. The off track margin test is repeated iteratively using a combination of channel variable settings in order to find a set of variable settings which provides an optimal performance criterion for the drive.

Abstract translation: 磁盘驱动器中的自适应信道优化通过选择记录介质的轨道然后将第一数据模式写入所选轨道的相对侧来实现。 第一数据图形（29a，29b）相对于所选择的轨道的中心线（24）写入一定百分比的轨道（25a，25b）。 然后将第二数据图形（30）直接写入所选择的数据轨道，并且取消跟踪余量作为在读取期间记录头可远离所选轨道的中心（24）的距离的函数 第二数据模式（30），同时满足指定的错误率。 使用通道变量设置的组合迭代地重复偏离轨道余量测试，以便找到为驱动器提供最佳性能标准的可变设置集合。

公开(公告)号：WO1994029854A1

公开(公告)日：1994-12-22

申请号：PCT/JP1994000914

申请日：1994-06-07

Applicant: SONY CORPORATION ,  INOUE, Hajime ,  SHIMA, Hisato ,  KANOTA, Keiji ,  KUBOTA, Yukio ,  SHIMAZU, Akira

Inventor： SONY CORPORATION

IPC: G11B05/09

CPC classification number: H04N9/8047 ,  G11B5/0086 ,  G11B5/09 ,  G11B15/02 ,  G11B15/087 ,  G11B15/125 ,  G11B15/1875 ,  G11B15/4671 ,  G11B15/4673 ,  G11B15/4731 ,  G11B20/00007 ,  G11B20/10527 ,  H04N5/77 ,  H04N5/775 ,  H04N5/78263 ,  H04N5/78266 ,  H04N5/919 ,  H04N9/8042 ,  H04N9/877

Abstract: A recording and reproducing device provided with at least a pair of rotary heads having different azimuths, running control means which controls the running of a magnetic tape, and recording timing control means which controls the recording by the rotary heads so that the recording can be performed in a first period when digital data having a first data rate are inputted, whereby the digital data can be recorded on the magnetic tape at the recording timing of the recording timing control means. In addition, the recording and reproducing device is also provided with a memory means which temporarily stores digital data supplied from the outside, reading means which reads out the digital data stored in the memory means, and signal processing means which performs a prescribed process of the digital data read out from the memory means. When digital data having a second data rate which is different from the first data rate are inputted, the recording timing control means and reading-out means perform processes at a speed based on the ratio between the two data rates and, at the same time, the running control means controls the running speed of the magnetic tape based on the data rate ratio.

Abstract translation: 具有至少一对具有不同方位角的旋转头的记录和再现装置，控制磁带运行的运行控制装置，以及控制旋转磁头进行记录的记录定时控制装置，以便能够进行记录 在具有第一数据速率的数字数据被输入的第一时段中，由此可以在记录定时控制装置的记录定时将数字数据记录在磁带上。 此外，记录和再现装置还具有临时存储从外部提供的数字数据的存储装置，读出存储在存储装置中的数字数据的读取装置和执行存储在存储装置中的数字数据的信号处理装置， 从存储装置读出数字数据。 当输入具有与第一数据速率不同的第二数据速率的数字数据时，记录定时控制装置和读出装置以基于两个数据速率之间的比率的速度执行处理，同时， 运行控制装置根据数据速率比来控制磁带的运行速度。

公开(公告)号：WO1994028543A1

公开(公告)日：1994-12-08

申请号：PCT/US1994006212

申请日：1994-06-02

Applicant: VIMAK CORPORATION

Inventor： VIMAK CORPORATION ,  KOULOPOULOS, Michael, A. ,  JAIN, Praduman ,  JAYASIMHA, Sriram

IPC: G11B05/09

CPC classification number: G11B20/1876

Abstract: An improved method for correcting errors in a sequence of digital audio data for use in a system having a compact disc player device and a digital signal processor. A compact disc player device reads a compact disc and outputs digital audio data as a series of digitized samples and detects erroneous samples. An error correction apparatus implements a finite impulse response filter (10). The method achieves a low level of interpolation error within the corrected output of the finite impulse response filter (10) by assigning zero-valued filter coefficients (H1 21 - Hn 24) to digital audio samples that are likely to be erroneous due to their proximity to a known erroneous digital audio sample.

Abstract translation: 一种改进的用于在具有光盘播放器设备和数字信号处理器的系统中使用的数字音频数据序列中的错误的方法。 光盘播放器装置读取光盘并将数字音频数据作为一系列数字化样本输出，并检测错误的样本。 纠错装置实现有限脉冲响应滤波器（10）。 该方法通过将零值滤波器系数（H1-21-Hn24）分配给由于它们的接近可能是错误的数字音频样本而在有限脉冲响应滤波器（10）的校正输出内实现低水平的内插误差 到已知的错误的数字音频样本。

公开(公告)号：WO1994020954A1

公开(公告)日：1994-09-15

申请号：PCT/JP1994000350

申请日：1994-03-04

Applicant: SONY CORPORATION ,  WATANABE, Kenjiro ,  TAKEDA, Toru ,  SEKO, Satoru ,  KAWAZOE, Kazushige ,  MUTO, Takayasu ,  MORITA, Osamu ,  HAYASHI, Nobuhiro ,  ISHIDA, Takehisa ,  ISHIOKA, Hideaki ,  YAMAKOSHI, Takamichi

Inventor： SONY CORPORATION

IPC: G11B05/09

CPC classification number: G11B20/1833 ,  G11B5/0086 ,  G11B5/012 ,  G11B5/5526 ,  G11B5/553 ,  G11B5/59605 ,  G11B5/59627 ,  G11B5/59633 ,  G11B5/82 ,  G11B20/10009 ,  G11B20/10194 ,  G11B20/1252 ,  G11B20/1258 ,  G11B25/043 ,  G11B27/19 ,  G11B27/3027 ,  G11B33/1486 ,  G11B2020/1277 ,  G11B2020/1292 ,  G11B2220/20

Abstract: A magnetic disk apparatus suitable for use as a hard disk apparatus in a computer system. The apparatus includes a disk-like medium having a magnetic film formed on a surface, which information is recorded on or reproduced from; and magnetic heads (20 - 31) for recording on or reproducing from the information the disk-like medium. The disk-like medium has data recording regions (20 - 41D) and control signal recording regions (20 - 40), (20 - 41H). In the data recording regions, data tracks are raised and adjacent data tracks are separated by recessing guard bands (20 - 20). In the control signal recording region, on the other hand, tracking marks (20 - 12), (20 - 13) for tracking control of the magnetic heads, track number marks (20 - 71) for stipulating the tracks , track numbers (20 - 41b1), (20 - 41b2) and clock marks (20 - 11) for equidistantly dividing a circumference are formed in projections and recesses along the paths (21 - 21) of the magnetic heads. In this apparatus, the guard band is recessed with respect to the track. Accordingly, the guard band needs not be expanded so as to reduce cross-talk, and a recording capacity can be increased by reducing the track pitch. Because the tracking mark and the track number mark or the clock mark are formed in projections and recesses along the paths of the magnetic heads, accurate access becomes possible even when the track pitch is reduced.

Abstract translation: 适用于计算机系统中的硬盘装置的磁盘装置。 该装置包括具有形成在表面上的磁性膜的盘状介质，该信息被记录在其上或从其再现; 以及用于在信息盘上记录或从盘状介质再现信息的磁头（20-31）。 盘状介质具有数据记录区（20〜41D）和控制信号记录区（20-40），（20-41H）。 在数据记录区域中，数据轨道被升高，并且相邻数据轨道被凹陷保护带（20-20）分开。 另一方面，在控制信号记录区域中，用于跟踪磁头的跟踪的跟踪标记（20-12），（20-13），用于规定轨道的轨道号码（20〜71），轨道号（20〜 - 41b1），（20-4lb2）和用于等距分割圆周的时钟标记（20-11）形成在沿着磁头的路径（21-21）的突起和凹陷中。 在该装置中，保护带相对于轨道凹陷。 因此，不需要扩大保护频带以减少串扰，并且可以通过减小音高来提高记录容量。 由于跟踪标记和轨道号标记或时钟标记沿着磁头的路径形成在凸起和凹槽中，所以即使当轨道间距减小时也能够进行准确的访问。

公开(公告)号：WO1993014494A1

公开(公告)日：1993-07-22

申请号：PCT/US1993000458

申请日：1993-01-15

Applicant: ALESIS

Inventor： ALESIS ,  BARR, Keith ,  ZAK, Alan ,  RYLE, Marcus

IPC: G11B05/09

CPC classification number: G11B27/036 ,  G11B5/0086 ,  G11B20/1208 ,  G11B27/032 ,  G11B27/3027 ,  G11B27/3036 ,  G11B2020/10592 ,  G11B2220/90 ,  G11B2220/913

Abstract: A method and apparatus for recording multiple channels (305) of digital audio data onto one-half inch tape using a rotary head recorder. The tape format includes sector spaces (306) and a write timing sector (308) to provide reduced susceptibility to errors arising from head misalignment, provides improved punch-in and punch-out capabilities using overdub identification values (415) recorded within each channel of audio information, and provides a unique time code word (420) that facilitates accurate high-speed scan and search operations, as well as multiple device synchronization. Each pair of audio tracks (203) terminates with a write timing sector that serves as an absolute location marker for the rotary head, and allows the digital audio system to determine precise head location with respect to the tape.

Abstract translation: 一种使用旋转磁头记录器将数字音频数据的多个通道（305）记录到半英寸磁带上的方法和装置。 磁带格式包括扇区空间（306）和写定时扇区（308），以提供对由头部未对准引起的错误的敏感度降低，使用记录在每个通道的每个通道内的过量标识值（415）提供改进的穿透和打孔能力 音频信息，并且提供有助于精确的高速扫描和搜索操作以及多个设备同步的唯一时间码字（420）。 每对音轨（203）终止于用作旋转磁头的绝对位置标记的写定时扇区，并且允许数字音频系统确定相对于磁带的精确磁头位置。

公开(公告)号：WO1991020079A1

公开(公告)日：1991-12-26

申请号：PCT/US1991004476

申请日：1991-06-20

Applicant: MAXTOR CORPORATION

Inventor： MAXTOR CORPORATION ,  HUBER, William, D.

IPC: G11B05/09

CPC classification number: G11B20/10046 ,  G09G3/3681 ,  G11B5/09 ,  G11B20/10009 ,  G11B20/1426

Abstract: A read channel detector circuit for recovery of digital data from a readback waveform produced by a magnetic recording head is disclosed. The detector circuit includes a forward filter (20) for slimming the rising edge and slurring the falling edge of an isolated input magnetic pulse. Quantized feedback techniques (23) are then used to produce a compensating waveform which is substantially complementary to the portion of the filtered waveform occurring after Tmin. The complementary waveform is then added (21) to the forward filter output to produce a waveform which is substantially a step function. This step function corresponds to a single digital transition, either positive-going or negative-going in a digital output sequence. The equalized waveform is then limited by a comparator (22) to produce the desired digital output sequence. By slimming only the rising edge of the input magnetic pulse and by using quantized feedback techniques, the overall bandwidth of the system is conserved resulting in an increased binary signalling capability without substantial intersymbol interference.

Abstract translation: 公开了一种用于从由磁记录头产生的回读波形恢复数字数据的读通道检测器电路。 检测器电路包括用于使上升沿减弱并阻断隔离输入磁脉冲的下降沿的正向滤波器（20）。 然后使用量化反馈技术（23）来产生与在Tmin之后发生的滤波波形的部分基本互补的补偿波形。 然后将互补波形（21）添加到正向滤波器输出，以产生基本上是阶梯函数的波形。 该步骤功能对应于数字输出序列中的单次数字转换，正向或负向。 然后，均衡波形被比较器（22）限制以产生所需的数字输出序列。 通过仅减少输入磁脉冲的上升沿并通过使用量化反馈技术，系统的总体带宽被保守，导致增加的二进制信令能力而没有实质的符号间干扰。

公开(公告)号：WO1990013892A1

公开(公告)日：1990-11-15

申请号：PCT/US1990002625

申请日：1990-05-10

Applicant: GSE, INCORPORATED

Inventor： GSE, INCORPORATED ,  ROGGENDORF, Peter

IPC: G11B05/09

CPC classification number: G11B27/107 ,  G11B27/024 ,  G11B27/324 ,  G11B2220/91

Abstract: An editing device for half-inch video tape applies pulse-width modulation to prerecorded synchronizing pulses in predetermined intervals. The inverval starts with an eleven-bit header (44) compatible with the VASS system. Pulse-width modulated time codes (48) identify the recording session and the elapsed time are then added. A check code (60) completes the modulation for fifty-hz systems, e.g. PAL and SECAM. For sixty-hz systems, e.g. NTSC, a ten-bit dummy code (62) is added to complete the interval. The code is entered without writing over the leading edge of the prerecorded synchronizing pulse, allowing the timing of those pulses to continue without interruption. An editor can locate any desired interval and can then locate an individual frame within that interval by counting synchronizing pulses.