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    • 33. 发明申请
    • Adaptive Calibration of Noise Predictive Finite Impulse Response Filter
    • 噪声预测有限脉冲响应滤波器的自适应校准
    • US20130339827A1
    • 2013-12-19
    • US13525182
    • 2012-06-15
    • Yang HanShaohua YangFan ZhangZongwang LiChangyou Xu
    • Yang HanShaohua YangFan ZhangZongwang LiChangyou Xu
    • G06F11/07
    • G11B20/10046H03M13/1111H03M13/2957H03M13/6325H03M13/6343H04L25/03171H04L25/03318H04L25/067
    • Various embodiments of the present inventions are related to adaptive calibration of NPFIR filters in a data detector. For example, an apparatus for calibrating a noise predictive filter is disclosed, including a data detector operable to generate detected values for data sectors and having an embedded noise predictive finite impulse response filter. The apparatus also includes a comparator operable to determine whether a quality metric for a current one of the data sectors meets a noise threshold. The apparatus also includes a filter calibration circuit operable to adapt a number of filter coefficients for the noise predictive finite impulse response filter based on the detected values for the data sectors, and to omit the detected values for the current one of the data sectors from adaptation for one of the filter coefficients if the quality metric for the current one of the data sectors does not meet the noise threshold.
    • 本发明的各种实施例涉及数据检测器中的NPFIR滤波器的自适应校准。 例如,公开了一种用于校准噪声预测滤波器的装置,包括可操作以产生数据扇区的检测值并具有嵌入式噪声预测有限脉冲响应滤波器的数据检测器。 该装置还包括比较器,可操作以确定当前数据扇区的质量度量是否符合噪声阈值。 该装置还包括滤波器校准电路,其可操作以基于用于数据扇区的检测值来适应用于噪声预测有限脉冲响应滤波器的多个滤波器系数,并且从适配中省去当前数据扇区的检测值 对于当前一个数据扇区的质量度量不满足噪声阈值的滤波器系数之一。
    • 37. 发明申请
    • Systems and Methods for Data Addressing in a Storage Device
    • 存储设备中数据寻址的系统和方法
    • US20120300332A1
    • 2012-11-29
    • US13113219
    • 2011-05-23
    • Yang HanZongwang LiShaohua YangWu Chang
    • Yang HanZongwang LiShaohua YangWu Chang
    • G11B5/02G11B5/09
    • G11B5/012G11B5/09G11B20/1217G11B20/1833G11B20/1866G11B2020/1222G11B2020/1267G11B2020/1288G11B2220/2516
    • Various embodiments of the present invention provide systems and methods for format efficient data storage. As an example, a data storage device is described that includes: a storage medium, a read/write head assembly, and a read channel circuit. The read/write head assembly is disposed in relation to the storage medium and operable to sense information corresponding to an encoded codeword. The read channel circuit is operable to receive the encoded codeword. The read channel circuit includes a missing symbols insertion circuit, a codeword de-scramble circuit, an address insertion circuit, and a data decoder circuit. The missing symbols insertion circuit, the codeword de-scramble circuit, and the address insertion circuit together are operable to pad a derivative of the encoded codeword with a plurality of symbols, to de-scramble the derivative of the encoded codeword, and to insert address information corresponding to the derivative of the encoded codeword to yield a modified encoded codeword. The data decoder circuit is operable to apply a data decoding algorithm to the modified encoded codeword to yield a decoded output.
    • 本发明的各种实施例提供了用于格式化数据存储的系统和方法。 作为示例,描述了数据存储设备,其包括:存储介质,读/写头组件和读通道电路。 读/写头组件相对于存储介质设置并且可操作以感测与编码码字对应的信息。 读通道电路可操作以接收编码码字。 读通道电路包括缺失符号插入电路,码字解扰电路,地址插入电路和数据解码器电路。 丢失的符号插入电路,码字解扰电路和地址插入电路在一起可操作以用多个符号填充经编码的码字的导数,以解码编码码字的导数,并插入地址 对应于编码码字的导数的信息以产生经修改的编码码字。 数据解码器电路可操作以将数据解码算法应用到经修改的编码码字以产生解码输出。