LDPC decoder with fractional unsatisfied check quality metric
    2.
    发明授权
    LDPC decoder with fractional unsatisfied check quality metric 有权
    具有分数不满足检验质量度量的LDPC解码器

    公开(公告)号:US08930788B2

    公开(公告)日:2015-01-06

    申请号:US13602463

    申请日:2012-09-04

    IPC分类号: H03M13/00

    摘要: An apparatus includes a low density parity check decoder operable to iteratively generate messages between a plurality of check nodes and variable nodes, and to calculate a fractional quality metric for a data block as it is decoded in the low density parity check decoder based at least in part on perceived values of data in the variable nodes. The fractional unsatisfied check quality metric is a probabilistic determination of a number of unsatisfied parity checks in the low density parity check decoder.

    摘要翻译: 一种装置包括低密度奇偶校验解码器,其可操作以在多个校验节点和可变节点之间迭代地生成消息,并且在低密度奇偶校验解码器中解码时计算数据块的分数质量度量,至少基于 部分变量节点中数据的感知值。 分数不满足的检查质量度量是低密度奇偶校验解码器中的不满足奇偶校验的数量的概率确定。

    REAL TIME CLOSE LOOP FLY HEIGHT CONTROL
    3.
    发明申请
    REAL TIME CLOSE LOOP FLY HEIGHT CONTROL 审中-公开
    实时关闭环路飞行高度控制

    公开(公告)号:US20140055882A1

    公开(公告)日:2014-02-27

    申请号:US13593682

    申请日:2012-08-24

    IPC分类号: G11B21/02

    CPC分类号: G11B5/6029 G11B5/607

    摘要: A device includes a disk drive assembly configured to store information using a platter comprising a magnetic material surface and a magnetic head disposed above the magnetic material surface. The magnetic head is configured to move across tracks formed on the platter to write information to the magnetic material surface and read information from the magnetic material surface. The device also includes a controller operatively coupled with the disk drive assembly. The controller is configured to dynamically adjust the height of the magnetic head above the magnetic material surface at each of the tracks by determining a harmonic ratio for a particular track and comparing the harmonic ratio to a reference harmonic ratio for the track. For example, the controller calculates a difference between the harmonic ratio and the reference harmonic ratio.

    摘要翻译: 一种设备包括:盘驱动器组件,其配置为使用包括磁性材料表面的盘片和设置在磁性材料表面上方的磁头来存储信息。 磁头构造成在形成在盘片上的轨道上移动以向磁性材料表面写入信息并从磁性材料表面读取信息。 该装置还包括与盘驱动器组件可操作地耦合的控制器。 控制器被配置为通过确定特定轨道的谐波比并将谐波比与轨道的基准谐波比进行比较来动态地调整磁道材料表面在每个轨道上方的高度。 例如,控制器计算谐波比和基准谐波比的差。

    Systems and methods for noise injection driven parameter selection
    7.
    发明授权
    Systems and methods for noise injection driven parameter selection 有权
    用于噪声注入驱动参数选择的系统和方法

    公开(公告)号:US08539328B2

    公开(公告)日:2013-09-17

    申请号:US13213808

    申请日:2011-08-19

    IPC分类号: G06F7/02 H03M13/00

    摘要: Various embodiments of the present invention provide systems and methods for data processing. As an example, a data processing circuit is disclosed that includes a noise injection circuit. The noise injection circuit is operable to: determine a difference between a first data output and a second data output to yield an error; and augment an interim data with a noise value corresponding to the error to yield a noise injected output. The interim data may be either the first data output or the second data output.

    摘要翻译: 本发明的各种实施例提供了用于数据处理的系统和方法。 作为示例,公开了包括噪声注入电路的数据处理电路。 噪声注入电路可操作用于:确定第一数据输出和第二数据输出之间的差异以产生误差; 并且增加具有与该误差相对应的噪声值的中间数据,以产生噪声注入输出。 中间数据可以是第一数据输出或第二数据输出。

    Method and system for symbol error rate estimation and sector quality measurement
    8.
    发明授权
    Method and system for symbol error rate estimation and sector quality measurement 有权
    符号误差率估计和扇区质量测量的方法和系统

    公开(公告)号:US08732537B2

    公开(公告)日:2014-05-20

    申请号:US13567740

    申请日:2012-08-06

    IPC分类号: G06F11/00

    CPC分类号: H03M13/114

    摘要: A probabilistic approach of symbol error estimation is disclosed. The probabilistic approach of symbol error estimation reflects the number of symbol errors more precisely than the number of unsatisfied checks. The more precise quality metric calculated in accordance with the present disclosure allows a codec system to achieve a better overall performance. In addition, many other features that previously depend on the number of unsatisfied checks as the sector quality metric may also benefit by adopting the more precise quality metric.

    摘要翻译: 公开了符号误差估计的概率方法。 符号误差估计的概率方法比不满意检查的数量更精确地反映符号错误的数量。 根据本公开计算的更精确的质量度量允许编解码器系统实现更好的整体性能。 此外,以前取决于不满足检查数量的许多其他功能作为扇区质量度量也可能通过采用更精确的质量度量而受益。

    METHOD AND SYSTEM FOR SYMBOL ERROR RATE ESTIMATION AND SECTOR QUALITY MEASUREMENT
    9.
    发明申请
    METHOD AND SYSTEM FOR SYMBOL ERROR RATE ESTIMATION AND SECTOR QUALITY MEASUREMENT 有权
    符号误差估计和部门质量测量的方法和系统

    公开(公告)号:US20140040682A1

    公开(公告)日:2014-02-06

    申请号:US13567740

    申请日:2012-08-06

    IPC分类号: G06F11/00

    CPC分类号: H03M13/114

    摘要: A probabilistic approach of symbol error estimation is disclosed. The probabilistic approach of symbol error estimation reflects the number of symbol errors more precisely than the number of unsatisfied checks. The more precise quality metric calculated in accordance with the present disclosure allows a codec system to achieve a better overall performance. In addition, many other features that previously depend on the number of unsatisfied checks as the sector quality metric may also benefit by adopting the more precise quality metric.

    摘要翻译: 公开了符号误差估计的概率方法。 符号误差估计的概率方法比不满意检查的数量更精确地反映符号错误的数量。 根据本公开计算的更精确的质量度量允许编解码器系统实现更好的整体性能。 此外,以前取决于不满足检查数量的许多其他功能作为扇区质量度量也可能通过采用更精确的质量度量而受益。

    Optimized multi-level finite state machine with redundant DC nodes
    10.
    发明授权
    Optimized multi-level finite state machine with redundant DC nodes 有权
    具有冗余DC节点的优化多级有限状态机

    公开(公告)号:US08730067B2

    公开(公告)日:2014-05-20

    申请号:US13564836

    申请日:2012-08-02

    IPC分类号: H03M5/14

    CPC分类号: H03M5/145 H04L1/22

    摘要: A method and system for eliminating/suppressing long transition runs over a communications channel is disclosed. The method may include providing modulation coding based on a multi-level finite state machine (ML-FSM) having a periodic structure, the periodic structure being defined by a predetermined number of time frames. The ML-FSM may include a plurality of penalty-free edges for connecting nodes in one time frame to nodes at the same level in a subsequent time frame and a plurality of penalty edges for connecting nodes in one time frame to nodes at an upper level in the subsequent time frame. The method may further include utilizing the ML-FSM based modulation coding to facilitate data transmission over the communications channel.

    摘要翻译: 公开了一种用于消除/抑制通过通信信道的长过渡运行的方法和系统。 该方法可以包括提供基于具有周期性结构的多级有限状态机(ML-FSM)的调制编码,周期性结构由预定数量的时间帧定义。 ML-FSM可以包括用于将一个时间帧中的节点连接到后续时间帧中的相同电平的节点的多个无罚币边缘,以及用于将一个时间帧中的节点连接到上一级节点的多个惩罚边 在随后的时间内。 该方法还可以包括利用基于ML-FSM的调制编码来促进在通信信道上的数据传输。