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    Method and apparatus for recording a digital information signal
    12.
    发明授权
    Method and apparatus for recording a digital information signal 失效
    用于记录数字信息信号的方法和装置

    公开(公告)号：US4697212A

    公开(公告)日：1987-09-29

    申请号：US705331

    申请日：1985-02-15

    Applicant: Eiichi Osawa ,  Masato Tanaka ,  Mamoru Yoshizawa ,  Jun Nakai ,  Yuichi Kojima

    Inventor： Eiichi Osawa ,  Masato Tanaka ,  Mamoru Yoshizawa ,  Jun Nakai ,  Yuichi Kojima

    IPC: G11B5/008 ,  G11B5/09 ,  G11B20/12 ,  G11B20/18 ,  G11B5/00

    CPC classification number: G11B20/1866 ,  G11B20/1204 ,  G11B20/1809 ,  G11B5/0083 ,  G11B5/00878 ,  G11B5/00891 ,  G11B20/1202 ,  G11B2020/10546 ,  G11B2020/1087 ,  G11B2020/10879 ,  G11B2220/90

    Abstract: A method of recording a digital data signal, such as an audio PCM signal, onto a recording medium in the longitudinal direction thereof, together with an apparatus which is suitable for this recording method. Even-numbered words and odd-numbered words in a digital data signal are recorded on a first track group and a second track group, respectively, which are separated from each other in the widthwise direction of a recording medium, to prevent a series of words becoming error words because of, for example, a flaw in the recording medium in the longitudinal direction thereof. The data format is changed at the input and output of a recording encoder to enable an error correction code and a recording circuit to be used in common for digital tape recorders which have different numbers of tracks, e.g., n tracks and 2n tracks. When an error correction code is recorded in such a manner that one word in the digital data signal is divided into a plurality of symbols which are formed into an error correction code, a plurality of symbols of the same word are recorded at a position at which error correlation is strong, making effective use of the error correction capacity of the error correction code.

    Abstract translation: PCT No.PCT / JP84 / 00313 Sec。 371日期1985年2月15日 102（e）日期1985年2月15日PCT Filed 1984年6月15日PCT公布。 出版物WO85 / 00068 1985年1月3日。一种将数字数据信号（诸如音频PCM信号）沿其纵向方向记录到记录介质上的方法以及适用于该记录方法的装置。 数字数据信号中的偶数字和奇数字分别记录在在记录介质的宽度方向上彼此分离的第一轨道组和第二轨道组上，以防止一系列单词 由于例如记录介质在其纵向方向上的缺陷而成为错误词。 数据格式在记录编码器的输入和输出处被改变，以使纠错码和记录电路能够被共同地用于具有不同数目的磁道，例如n个磁道和2n个磁道的数字磁带记录器。 当以使数字数据信号中的一个字被分成形成为纠错码的多个符号的方式记录纠错码时，同一个字的多个符号被记录在 误差相关性较强，有效利用纠错码的纠错能力。

    Apparatus and method for multi-track recording of a digital signal
    13.
    发明授权
    Apparatus and method for multi-track recording of a digital signal 失效
    用于多轨记录数字信号的装置和方法

    公开(公告)号：US4424541A

    公开(公告)日：1984-01-03

    申请号：US238099

    申请日：1981-02-25

    Applicant: Kazuo Koinuma ,  Masami Yamazaki

    Inventor： Kazuo Koinuma ,  Masami Yamazaki

    IPC: G11B5/02 ,  G11B5/008 ,  G11B5/48 ,  G11B5/55 ,  G11B5/56 ,  G11B15/06 ,  G11B20/12 ,  G11B21/02

    CPC classification number: G11B5/4893 ,  G11B15/06 ,  G11B5/0083 ,  G11B5/5504 ,  G11B5/56

    Abstract: A single multi-track head having a plurality of head gaps aligned on a center axis thereof is arranged to assume respectively first and second inclined positions with respect to a transverse axis of a magnetic recording tape. The number of the head gaps equals a half of the total number of tracks to be formed on the tape, and the head gaps are equidistantly spaced so that only odd tracks are formed to record a digital signal when the tape runs in one direction with the multi-track head in one of the first and second inclined positions. When the tape has come to the end, the tape is turned upside down to continuously record the digital signal on even tracks. Before forming the even tracks, the multi-track head is manually or automatically operated to assume the other inclined position. With this operation, the odd and even tracks have different azimuths from each other preventing cross-talk between adjacent tracks. An electrical circuit for detecting which side of the tape is at the top, and a mechanism for rotating the multi-track head either clockwise or counterclockwise may be employed for automatically placing the multi-track head in one of the first and second inclined positions.

    Abstract translation: 具有在其中心轴上对准的多个头部间隙的单个多轨道头部被设置成相对于磁记录带的横轴分别呈现第一和第二倾斜位置。 磁头间隙的数量等于要在磁带上形成的磁道总数的一半，并且磁头间隙等距间隔开，以便只有奇数磁迹形成为当磁带沿着一个方向运行时记录数字信号 多轨头在第一和第二倾斜位置之一。 当磁带到达结束时，磁带被颠倒，以在数字信号上连续记录数字信号。 在形成偶数轨道之前，多轨头被手动或自动地操作以呈现另一倾斜位置。 通过该操作，奇数和偶数轨道彼此具有不同的方位角，从而防止相邻轨道之间的串扰。 用于检测磁带的哪一侧位于顶部的电路以及用于顺时针或逆时针转动多磁道头的机构可用于将多磁道头自动放置在第一和第二倾斜位置之一中。

    Closed loop control of tape media positioning within tape drive using position error signal feedback
    16.
    发明授权
    Closed loop control of tape media positioning within tape drive using position error signal feedback 有权
    使用位置误差信号反馈在磁带驱动器内磁带介质定位的闭环控制

    公开(公告)号：US08982493B2

    公开(公告)日：2015-03-17

    申请号：US14482815

    申请日：2014-09-10

    Applicant: Oracle International Corporation

    Inventor： Daniel W. Underkofler

    IPC: G11B5/584 ,  G11B15/60 ,  G11B5/008

    CPC classification number: G11B5/584 ,  G11B5/00817 ,  G11B5/0083 ,  G11B15/602

    Abstract: A control system for a tape drive that uses position error signals (PESs) generated by a tape head assembly of the tape drive during longitudinal movement of a tape through the drive to dynamically adjust a lateral and/or angular position of tape to enhance tape drive performance (e.g., the ability of a tape head assembly to precisely follow one or more data and/or servo tracks on the tape). In one arrangement, the PESs and/or PES metrics are used as feedback into the system to steer the tape by moving one or more tape path guides until subsequently generated PESs or PES metrics have been optimized or have at least moved back into an acceptable range or to acceptable levels. The disclosed control system facilitates achieving increased stringencies on PES minimization that come with increased tape drive magnetic track densities.

    Abstract translation: 一种用于磁带驱动器的控制系统，其利用由带驱动器的磁头组件产生的位置误差信号（PES），该磁带驱动器在磁带通过驱动器的纵向运动期间动态地调整磁带的横向和/或角度位置以增强磁带驱动 性能（例如，磁头组件精确地跟随磁带上的一个或多个数据和/或伺服磁道的能力）。 在一种布置中，PES和/或PES度量用作系统的反馈，以通过移动一个或多个磁带路径引导件来引导磁带，直到随后生成的PES或PES度量已经被优化或至少被移回到可接受的范围内 或达到可接受的水平。 所公开的控制系统有助于实现随着磁带驱动磁道密度增加而带来的PES最小化的增加的严格性。

    TAPE FRICTION MEASUREMENT
    17.
    发明申请
    TAPE FRICTION MEASUREMENT 有权
    胶带摩擦测量

    公开(公告)号：US20140063640A1

    公开(公告)日：2014-03-06

    申请号：US13600094

    申请日：2012-08-30

    Applicant: Reed A. Hancock ,  Randy C. Inch ,  Eiji Ogura

    Inventor： Reed A. Hancock ,  Randy C. Inch ,  Eiji Ogura

    IPC: G11B27/36 ,  G11B15/46

    CPC classification number: G11B15/46 ,  G11B5/00813 ,  G11B5/0083 ,  G11B5/40 ,  G11B5/60 ,  G11B15/467 ,  G11B15/52 ,  G11B15/62

    Abstract: A method according to one embodiment includes setting a default friction value to a predetermined value, determining whether a primary velocity is valid, determining a velocity error, determining whether the velocity error is in a predetermined range, accumulating the velocity error when the velocity error is determined to be in the predetermined range, repeating, until a time period has elapsed, each of: the determining the velocity error, the determining whether the velocity error is in the predetermined range, and the accumulating the velocity error when the velocity error is determined to be in the predetermined range, and calculating a new friction value based on the accumulated velocity error.

    Abstract translation: 根据一个实施例的方法包括将默认摩擦值设置为预定值，确定主速度是否有效，确定速度误差，确定速度误差是否在预定范围内，当速度误差为 确定为在预定范围内，重复，直到经过时间段为止：确定速度误差，确定速度误差是否在预定范围内，并且当确定速度误差时累积速度误差 处于预定范围内，并且基于累积的速度误差来计算新的摩擦值。

    VARIABLE STOPWRITE THRESHOLD WITH VARIABLE SMOOTHING FACTOR
    18.
    发明申请
    VARIABLE STOPWRITE THRESHOLD WITH VARIABLE SMOOTHING FACTOR 失效
    具有可变平滑因子的可变停止门限

    公开(公告)号：US20140022666A1

    公开(公告)日：2014-01-23

    申请号：US13554966

    申请日：2012-07-20

    Applicant: Nhan X. Bui ,  Kevin B. Judd ,  Tomoko Taketomi

    Inventor： Nhan X. Bui ,  Kevin B. Judd ,  Tomoko Taketomi

    IPC: G11B21/02

    CPC classification number: G11B5/00817 ,  G11B5/0083 ,  G11B5/09 ,  G11B5/584 ,  G11B20/10388 ,  G11B27/36

    Abstract: In one embodiment, a data storage system includes a head; a drive mechanism for passing a medium over the head; a controller electrically coupled to the head; logic encoded in or available to the controller for: periodically determining a stopwrite threshold based on a standard deviation or a variance at a current position error signal sample, wherein a smoothing factor applied to a subsequent calculation of the standard deviation or variance is altered based at least in part on a current magnitude of the standard deviation or the variance; determining whether the current position error signal sample exceeds the stopwrite threshold; disabling writing when the current position error signal sample exceeds the stopwrite threshold; and enabling writing when the current position error signal sample does not exceed the stopwrite threshold. Other systems, methods, and computer program products are described according to more embodiments.

    Abstract translation: 在一个实施例中，数据存储系统包括头部; 用于使介质通过头部的驱动机构; 控制器电耦合到头部; 编码在或可用于控制器的逻辑，用于：基于当前位置误差信号样本的标准偏差或方差周期性地确定停止写入阈值，其中应用于随后的标准偏差或方差的计算的平滑因子基于 至少部分地基于当前的标准偏差或方差的大小; 确定当前位置误差信号样本是否超过限制写入阈值; 当当前位置错误信号样本超过限制写入阈值时禁止写入; 并且当当前位置误差信号采样不超过限制写入阈值时使能写入。 根据更多实施例描述其它系统，方法和计算机程序产品。

    TRACK-DEPENDENT DATA RANDOMIZATION MITIGATING FALSE VFO DETECTION
    20.
    发明申请
    TRACK-DEPENDENT DATA RANDOMIZATION MITIGATING FALSE VFO DETECTION 有权
    跟踪依赖的数据随机化，减轻虚拟VFO检测

    公开(公告)号：US20120307393A1

    公开(公告)日：2012-12-06

    申请号：US13149905

    申请日：2011-06-01

    Applicant: Roy D. Cideciyan ,  Thomas Mittelholzer ,  Paul J. Seger ,  Keisuke Tanaka

    Inventor： Roy D. Cideciyan ,  Thomas Mittelholzer ,  Paul J. Seger ,  Keisuke Tanaka

    IPC: G11B5/09

    CPC classification number: G11B5/0083 ,  G11B5/09 ,  G11B20/10009 ,  G11B20/10222 ,  G11B20/10259 ,  G11B20/1833 ,  G11B2220/956 ,  H03M13/09 ,  H03M13/27 ,  H03M13/2909 ,  H03M13/2945 ,  H03M13/6561 ,  H04L1/0042

    Abstract: A method for randomizing data to mitigate false VFO detection is described. In one embodiment, such a method includes simultaneously receiving multiple input data streams. Each input data stream is associated with a different track on a magnetic tape medium. The input data streams are simultaneously scrambled to produce multiple randomized data streams. The input data streams are scrambled such that different bit patterns are produced in the randomized data streams even where corresponding bit patterns in the input data streams are identical. The randomized data streams are simultaneously written to their associated data tracks on the magnetic tape medium. A corresponding apparatus is also described.

    Abstract translation: 描述用于随机化数据以减轻虚假VFO检测的方法。 在一个实施例中，这种方法包括同时接收多个输入数据流。 每个输入数据流与磁带介质上的不同轨道相关联。 输入数据流被同时加扰以产生多个随机数据流。 输入数据流被加扰，使得在随机数据流中产生不同的位模式，即使输入数据流中相应的位模式是相同的。 随机数据流被同时写入到磁带介质上的相关联的数据轨道上。 还描述了相应的装置。

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