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    Adaptive servo gap detection for timing based servo
    1.
    发明授权
    Adaptive servo gap detection for timing based servo 有权
    基于定时的伺服自适应伺服间隙检测

    公开(公告)号：US06278571B1

    公开(公告)日：2001-08-21

    申请号：US09314078

    申请日：1999-05-19

    申请人： Nhan Xuan Bui ,  Junichi Fukuda ,  Glen Alan Jaquette ,  John Alexander Koski ,  Kazuhiro Tsuruta

    发明人： Nhan Xuan Bui ,  Junichi Fukuda ,  Glen Alan Jaquette ,  John Alexander Koski ,  Kazuhiro Tsuruta

    IPC分类号： G11B5584

    CPC分类号： G11B21/103 ,  G11B5/00878 ,  G11B5/584 ,  G11B27/13 ,  G11B2220/93

    摘要： Disclosed are a method and a detector for adaptively detecting servo gaps in a timing based servo pattern prerecorded on a variable velocity media. The timing based servo pattern has groups of repeated pairs of non-parallel transition stripes arranged in bursts, the bursts separated by servo gaps whose length is variable. A servo system sensor senses the transition stripes in the longitudinal direction of the media. A group interval detector coupled to the sensor detects the timing interval between the same slope transition stripes of two sequential groups of bursts. A divider divides the detected group timing interval by a predetermined divisor to provide a divided timing interval gap detection threshold. A sequential stripe interval detector coupled to the sensor measures the timing interval between stripes, and a comparator compares the divided timing interval and the timing interval, identifying a servo gap upon the measured timing interval at least equaling the gap threshold. The detector responds to “valid” signals which indicate the validity of the detected group timing interval, repeating operation of the divider to update the gap threshold, and repeating operation of the comparator with the updated gap threshold to continue to identify the servo gaps.

    摘要翻译： 公开了一种用于在预先记录在可变速度介质上的基于定时的伺服模式中自适应地检测伺服间隙的方法和检测器。 基于定时的伺服模式具有以突发方式排列的重复的非平行过渡条带对，这些脉冲串由长度可变的伺服间隙分开。 伺服系统传感器感测介质沿纵向的过渡条纹。 耦合到传感器的组间隔检测器检测两个连续的突发组的相同斜率跃迁条之间的定时间隔。 分频器将检测到的组定时间隔除以预定的除数以提供划分的定时间隔间隙检测阈值。 耦合到传感器的顺序条带间隔检测器测量条纹之间的定时间隔，并且比较器比较划分的定时间隔和定时间隔，在测量的定时间隔上识别至少等于间隙阈值的伺服间隙。 检测器响应指示检测到的组定时间隔的有效性的“有效”信号，重复分频器的操作以更新间隙阈值，并且以更新的间隙阈值重复操作比较器以继续识别伺服间隙。

    Robust detection of data modulated into a timing based servo
    2.
    发明授权
    Robust detection of data modulated into a timing based servo 有权
    对基于定时的伺服调制的数据的鲁棒检测

    公开(公告)号：US06239939B1

    公开(公告)日：2001-05-29

    申请号：US09370256

    申请日：1999-08-09

    申请人： Nhan Xuan Bui ,  Junichi Fukuda ,  Glen Alan Jaquette ,  John Alexander Koski ,  Kazuhiro Tsuruta

    发明人： Nhan Xuan Bui ,  Junichi Fukuda ,  Glen Alan Jaquette ,  John Alexander Koski ,  Kazuhiro Tsuruta

    IPC分类号： G11B5584

    CPC分类号： G11B5/592 ,  G11B5/584

    摘要： A detector and method for detecting data modulated into a timing based servo pattern prerecorded on a media, comprising shifts of pairs of non-parallel transition stripes arranged in a frame of two bursts. Timing intervals between sequential transition stripes are detected. Interval comparison logic compares selected timing intervals and indicates whether the compared intervals represent a “0”, or a “1”. First and second counters respectively increment the number of the compared intervals representing a “0” and representing a “1” in each frame. Bit comparison logic compares, for each frame, the incremented numbers representing a “0” and a “1” to a predetermined criteria and, upon one of the numbers meeting the criteria, identifies the corresponding “0” or “1” as the bit value for the frame. The bits are data comprising longitudinal position words arranged in a linear sequence. Sequence logic calculates the next sequential position word from an immediately preceding word and determines whether the detected word is in the linear sequence as a validity check, and provides the calculated word as the output. Thus, the correct position word is provided at the output even if the detected word is invalid.

    摘要翻译： 一种检测器和方法，用于检测被调制到在介质上预先记录的基于时序的伺服模式中的数据，包括以两个脉冲串的帧布置的非平行过渡条带对的移位。 检测顺序过渡条纹之间的时序间隔。 间隔比较逻辑比较所选择的定时间隔，并指示所比较的间隔是“0”还是“1”。 第一和第二计数器分别增加表示“0”的比较间隔的数量，并在每一帧中表示“1”。 比较比较逻辑对于每个帧将对于预定标准表示“0”和“1”的递增数字进行比较，并且在符合标准的数字之一中将相应的“0”或“1”标识为位 框架的值。 位是包括以线性顺序排列的纵向位置字的数据。 顺序逻辑从紧前面的字计算下一个顺序位置字，并确定所检测的字是否在线性序列中作为有效性检查，并将计算出的字提供为输出。 因此，即使检测到的字无效，也在输出端提供正确的位置字。

    Data set to recording media registration and synchronization
    3.
    发明授权
    Data set to recording media registration and synchronization 有权
    数据设置为记录媒体注册和同步

    公开(公告)号：US06532128B1

    公开(公告)日：2003-03-11

    申请号：US09314073

    申请日：1999-05-19

    申请人： Nhan Xuan Bui ,  Glen Alan Jaquette ,  John Alexander Koski ,  Kazuhiro Tsuruta

    发明人： Nhan Xuan Bui ,  Glen Alan Jaquette ,  John Alexander Koski ,  Kazuhiro Tsuruta

    IPC分类号： G11B1548

    CPC分类号： G11B27/36 ,  G11B27/322 ,  G11B2220/90 ,  G11B2220/95

    摘要： A system and method for precisely registering and synchronizing data sets on a recording media having a prerecorded servo pattern. The recording media is subject to continuing movement for reading and/or writing the data sets, interrupted by stopping at the end of a selected data set and restarting. During the continuing movement of the recording media, a detector coupled to the servo system continuously reads linear position registration data modulated into the prerecorded servo pattern. An interpolator interpolates the prerecorded registration data to provide precision registration information for the data sets. Upon the drive stopping the recording media, then back hitching the media and the movement restarting, selected read and interpolated registration information is provided. The detector again reads and interpolates the prerecorded registration data, and a comparator compares the again read and interpolated registration information to the provided read and interpolated registration information and any predetermined offset, and indicates a comparison match. A data formatter coupled to the comparator, responsive to the comparison match indication, synchronizes the reading and/or writing of data sets on the recording media.

    摘要翻译： 一种用于在具有预先记录的伺服模式的记录介质上精确地注册和同步数据集的系统和方法。 记录介质被持续移动，用于读取和/或写入数据集，通过在所选数据集的结束处停止并重新启动而中断。 在记录介质的继续运动期间，耦合到伺服系统的检测器连续读取调制到预先记录的伺服模式中的线性位置登记数据。 内插器内插预先记录的注册数据，以提供数据集的精确注册信息。 当驱动器停止记录介质时，然后返回连接介质并重新启动移动，提供所选择的读取和插入的注册信息。 检测器再次读取并内插预先记录的注册数据，并且比较器将再次读取和内插的注册信息与所提供的读取和内插注册信息和任何预定偏移进行比较，并且指示比较匹配。 响应于比较匹配指示，耦合到比较器的数据格式化器同步数据集在记录介质上的读取和/或写入。

    Identification of laterally positioned servo bands employing differentiating characteristics of servo patterns
    5.
    发明授权
    Identification of laterally positioned servo bands employing differentiating characteristics of servo patterns 失效
    使用伺服模式的微分特性识别横向定位的伺服带

    公开(公告)号：US07002763B2

    公开(公告)日：2006-02-21

    申请号：US10638041

    申请日：2003-08-08

    申请人： Nhan Xuan Bui ,  James Howard Eaton ,  Junichi Fukuda ,  Glen Alan Jaquette ,  Eiji Ogura ,  Mark Allan Taylor ,  Kazuhiro Tsuruta

    发明人： Nhan Xuan Bui ,  James Howard Eaton ,  Junichi Fukuda ,  Glen Alan Jaquette ,  Eiji Ogura ,  Mark Allan Taylor ,  Kazuhiro Tsuruta

    IPC分类号： G11B5/09

    CPC分类号： G11B5/584 ,  G11B5/00813 ,  G11B5/78

    摘要： In a tape having separate servo bands of patterns positioned laterally across the tape, the patterns of a separate servo band have at least one differentiating characteristic with respect to patterns of another of the separate servo bands. The differentiating characteristic allows identification of the separate servo bands. For example, the patterns of a separate servo band have differing azimuthal orientations of detectable transitions with respect to another servo band, such as being laterally inverted. In another, variations in the width of gaps of patterns are made with respect to another servo band. In another, variations are made in the number of the detectable transitions of patterns with respect to the patterns of another servo band.

    摘要翻译： 在具有横向跨越带的位置的分离的图案的带的带中，单独的伺服带的图案相对于另一个分离的伺服带的图案具有至少一个微分特性。 微分特性允许识别单独的伺服带。 例如，单独的伺服带的图案具有相对于另一个伺服带的可检测转变的方位取向不同，例如横向倒置。 另一方面，相对于另一个伺服带，进行图案间隙宽度的变化。 另一方面，在相对于另一个伺服带的图案的图案的可检测转变的数量中进行变化。

    Tape servo information with superimposed data information providing servo band identification
    7.
    发明授权
    Tape servo information with superimposed data information providing servo band identification 有权
    磁带伺服信息与叠加数据信息提供伺服带识别

    公开(公告)号：US06937413B2

    公开(公告)日：2005-08-30

    申请号：US10638080

    申请日：2003-08-08

    申请人： Nhan Xuan Bui ,  James Howard Eaton ,  Junichi Fukuda ,  Glen Alan Jaquette ,  Eiji Ogura ,  Mark Allan Taylor ,  Kazuhiro Tsuruta

    发明人： Nhan Xuan Bui ,  James Howard Eaton ,  Junichi Fukuda ,  Glen Alan Jaquette ,  Eiji Ogura ,  Mark Allan Taylor ,  Kazuhiro Tsuruta

    IPC分类号： G11B5/008 ,  G11B5/584 ,  G11B5/78 ,  G11B5/09

    CPC分类号： G11B5/584 ,  G11B5/00813 ,  G11B5/78

    摘要： In magnetic tape having separate longitudinal servo bands of servo information with superimposed data information, the separate servo bands have selected different superimposed data information, to identify the separate servo bands for independent addressability. The servo information comprises non-parallel laterally extending transitions to indicate lateral positioning, and the selected different superimposed data information may comprise a lack thereof in portion(s) of the servo bands. Where the superimposed data information is longitudinal position information of the tape, the selected different superimposed data information may comprise different longitudinal position information of one or more servo band(s). The selected different superimposed data information may comprise a band identifier in the superimposed data information of one or more of the servo bands.

    摘要翻译： 在具有具有叠加数据信息的伺服信息的单独的纵向伺服带的磁带中，分离的伺服带已经选择了不同的叠加数据信息，以识别用于独立寻址能力的单独的伺服带。 伺服信息包括非平行横向延伸的转换以指示横向定位，并且所选择的不同叠加数据信息可能包括在伺服带的一部分中的缺乏。 在叠加数据信息是磁带的纵向位置信息的情况下，所选择的不同叠加数据信息可以包括一个或多个伺服带的不同纵向位置信息。 所选择的不同的叠加数据信息可以包括一个或多个伺服带的叠加数据信息中的频带标识符。

    Acquisition of highly variable data frequency by digital edge processing
    10.
    发明授权
    Acquisition of highly variable data frequency by digital edge processing 失效
    通过数字边缘处理获取高可变数据频率

    公开(公告)号：US6118745A

    公开(公告)日：2000-09-12

    申请号：US13058

    申请日：1998-01-26

    申请人： Robert Allen Hutchins ,  Glen Alan Jaquette ,  Kazuhiro Tsuruta

    发明人： Robert Allen Hutchins ,  Glen Alan Jaquette ,  Kazuhiro Tsuruta

    IPC分类号： G11B7/0037 ,  G11B7/005 ,  G11B19/28 ,  G11B20/10 ,  G11B20/14 ,  G11B7/00

    CPC分类号： G11B20/1403 ,  G11B20/10009 ,  G11B7/0037 ,  G11B7/005

    摘要： Disclosed is a digital edge processor frequency control for estimating the center frequency of a recorded signal having a known format, such as data recorded on a CLV optical disk or on magnetic tape. The read channel includes a sampling detector which samples the recorded signal at a known rate to provide edge position signals (PAT) indicating the location of recorded pulse edges. An edge pattern identifier detects whether the edge signals of the recording signal match a predetermined element of the known format. Examples of predetermined elements include a pulse of a known length and whose edges are spaced a known distance, a predetermined pulse pattern, or a pulse or pattern at a known location. An interval counter is coupled to the pattern identifier for measuring the interval length between the edges of the matching pulse or pattern in units of the sample length. A center frequency estimator calculates the period of the center frequency of the matching edges by relating the matching edge interval length to a predetermined nominal wave length for the predetermined element of the known format. The result is a Tau that is used to establish the center frequency for the digital PLL.

    摘要翻译： 公开了一种用于估计具有已知格式的记录信号的中心频率的数字边缘处理器频率控制，诸如记录在CLV光盘或磁带上的数据。 读通道包括采样检测器，其以已知的速率采样所记录的信号，以提供指示所记录的脉冲边缘位置的边缘位置信号（PAT）。 边缘图案标识符检测记录信号的边缘信号是否与已知格式的预定元素匹配。 预定元件的示例包括已知长度的脉冲，并且其边缘在已知位置处间隔已知距离，预定脉冲图案或脉冲或图案。 间隔计数器耦合到模式标识符，用于以样本长度为单位测量匹配脉冲或图案的边缘之间的间隔长度。 中心频率估计器通过将匹配边缘间隔长度与已知格式的预定元素的预定标称波长相关联来计算匹配边缘的中心频率的周期。 结果是用于建立数字PLL的中心频率的Tau。