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21. 发明授权

US5329535A Variable block lengths on-the-fly error correcting decoder 失效
标题翻译：可变块长度即时纠错解码器
公开(公告)号：US5329535A
公开(公告)日：1994-07-12
申请号：US876593
申请日：1992-04-30
申请人： Jonathan D. Coker
发明人： Jonathan D. Coker
IPC分类号： G11B20/18 , H03M13/15 , H03M13/22
CPC分类号： G11B20/1833 , H03M13/15
摘要： An ECC decoder is provided for use with variable block lengths of Reed-Solomon (RS) code for on-the-fly detecting of multiple errors and correction of one error byte per interleave in data recorded on a storage medium in blocks. Each data block includes variable length data subblocks equal to N*L, where N equals a variable number of bytes per interleave and L equals the interleave degree. The ECC decoder includes a delay register for sequentially receiving consecutive N*L data bytes of the data subblocks at a delay register data input and for sequentially transferring the consecutive N*L data bytes of data subblocks to a delay register data output. Each subblock contains a predetermined number of error check bytes M. Multiple M partial syndrome generators sequentially receive the consecutive subblocks of data and generate partial syndromes. The generated partial syndromes are compared to identify agreement. A first one of the multiple M partial syndrome generators is coupled to the delay register data output for selectively adding an error pattern to the transferred data subblock responsive to identified agreement of the partial syndromes.
摘要翻译：提供ECC解码器，用于使用Reed-Solomon（RS）码的可变块长度，用于在块中的记录在存储介质上的数据中的多个错误的动态检测和每个交织的一个错误字节的校正。每个数据块包括等于N * L的可变长度数据子块，其中N等于每个交织的可变字节数，L等于交织度。 ECC解码器包括延迟寄存器，用于在延迟寄存器数据输入处顺序接收数据子块的连续N * L个数据字节，并将数据子块的连续N * L个数据字节依次传送到延迟寄存器数据输出。每个子块包含预定数量的错误校验字节M.多个M部分校正子发生器顺序地接收连续的数据子块并产生部分校正子。将产生的部分综合征进行比较以确定协议。多个M部分校正子发生器中的第一个被耦合到延迟寄存器数据输出端，用于响应于所识别出的部分综合征的一致性，有选择地将错误模式添加到传送的数据子块中。

22. 发明授权

US4821125A Compensation of write current adn delta-V for recording component and radial position 失效
标题翻译：用于记录组件和径向位置的写入电流adn delta-V的补偿
公开(公告)号：US4821125A
公开(公告)日：1989-04-11
申请号：US872793
申请日：1986-06-11
申请人： Thomas C. Christensen , Jonathan D. Coker , Earl A. Cunningham , Richard C. Jaworski , Gregory J. Kerwin , Dean C. Palmer , Jeffrey R. Roepke
发明人： Thomas C. Christensen , Jonathan D. Coker , Earl A. Cunningham , Richard C. Jaworski , Gregory J. Kerwin , Dean C. Palmer , Jeffrey R. Roepke
IPC分类号： G11B5/09 , G11B5/00 , G11B5/012 , G11B5/035 , G11B5/455 , G11B20/18 , G11B27/36
CPC分类号： G11B20/10481 , G11B20/1816 , G11B27/36 , G11B5/012 , G11B5/455 , G11B2005/0013 , G11B2020/183 , G11B5/035
摘要： A magnetic disk drive channel circuitry is shown and described that generates eight incremental values of write current and eight incremental values of delta-V (the minimum voltage change per unit time which tests signals to discriminate between data and noise). Each of these variable parameter values may be program selected by a three bit bus signal. This variability testing of an adaptation to the optimum parameter value for each head media combination and by grouping tracks in contiguous data bands, the parameters may be optimized for tracks near the inner diameter, the outer diameter and in the middle band. The variable delta-V can also be used as an additional data recovery tool wherein re-reading with a lower value enhances recovery of missing bit errors and re-reading with an increased value can assist recovery from an extra bit error.
摘要翻译：显示和描述了磁盘驱动器通道电路，其产生写入电流的八个增量值和delta-V的八个增量值（每单位时间的最小电压变化，其测试信号以区分数据和噪声）。这些可变参数值中的每一个可以由三位总线信号来选择程序。对于每个头部介质组合的最佳参数值的适应性以及通过对连续的数据带中的轨道进行分组的这种可变性测试，可以针对靠近内径，外径和中间带的轨迹优化参数。变量delta-V也可以用作额外的数据恢复工具，其中用较低值重新读取增强了丢失位错误的恢复，并且用增加的值重新读取可以帮助从额外的位错误中恢复。

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