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1. 发明授权

US07397398B2 Modulation bit added to worst case codeword 失效
标题翻译：调制位添加到最坏情况码字
公开(公告)号：US07397398B2
公开(公告)日：2008-07-08
申请号：US11431122
申请日：2006-05-09
申请人： Ming Jin , Hiauchoon Kee , Zhenyu Sun , Liu Li , Myint Ngwe
发明人： Ming Jin , Hiauchoon Kee , Zhenyu Sun , Liu Li , Myint Ngwe
IPC分类号： H03M7/00
CPC分类号： H03M5/145 , G11B20/1426 , G11B2220/2516
摘要： A data word is error correction encoded to provide a worst case codeword without bit transitions between worst case codeword bits. A modulation bit is calculated as a function of the worst case codeword. The modulation bit has a bit polarity opposite a bit polarity of the worst case codeword bits. The worst case codeword bits are added with the modulation bit to form a modulated code word.
摘要翻译：对数据字进行纠错编码，以提供最坏情况码字，而不会在最差情况码字位之间进行位转换。作为最差情况码字的函数计算调制比特。调制位具有与最坏情况码字位的位极性相反的位极性。最差情况下，码字比特与调制比特相加以形成调制码字。

2. 发明申请

US20070262888A1 Modulation bit added to worst case codeword 失效
标题翻译：调制位添加到最坏情况码字
公开(公告)号：US20070262888A1
公开(公告)日：2007-11-15
申请号：US11431122
申请日：2006-05-09
申请人： Ming Jin , Hiauchoon Kee , Zhenyu Sun , Liu Li , Myint Ngwe
发明人： Ming Jin , Hiauchoon Kee , Zhenyu Sun , Liu Li , Myint Ngwe
IPC分类号： H03M7/34
CPC分类号： H03M5/145 , G11B20/1426 , G11B2220/2516
摘要： A data word is error correction encoded to provide a worst case codeword without bit transitions between worst case codeword bits. A modulation bit is calculated as a function of the worst case codeword. The modulation bit has a bit polarity opposite a bit polarity of the worst case codeword bits. The worst case codeword bits are added with the modulation bit to form a modulated code word.
摘要翻译：对数据字进行纠错编码，以提供最坏情况码字，而不会在最差情况码字位之间进行位转换。作为最差情况码字的函数计算调制比特。调制位具有与最坏情况码字位的位极性相反的位极性。最差情况下，码字比特与调制比特相加以形成调制码字。

3. 发明授权

US07738201B2 Read error recovery using soft information 有权
标题翻译：使用软信息读取错误恢复
公开(公告)号：US07738201B2
公开(公告)日：2010-06-15
申请号：US11507063
申请日：2006-08-18
申请人： Ming Jin , Hiau Choon Kee , Myint Ngwe , Liu Li
发明人： Ming Jin , Hiau Choon Kee , Myint Ngwe , Liu Li
IPC分类号： G11B5/09 , G11B20/10
CPC分类号： G11B20/18 , G11B20/10296 , G11B2020/183 , G11B2220/2516
摘要： In general, this disclosure describes read recovery techniques for data storage devices that use soft information associated with multiple read operations to detect data. Specifically, the read recovery techniques comprise computing soft information for each bit detected during a first read operation of a data storage medium, computing soft information for each bit detected during a second read operation of the data storage medium and averaging the soft information computed during the first and second read operations to determine the value of each of the bits.
摘要翻译：通常，本公开描述了使用与多个读取操作相关联的软信息来检测数据的数据存储设备的读取恢复技术。具体地，读取恢复技术包括计算在数据存储介质的第一次读取操作期间检测到的每个位的软信息，计算在数据存储介质的第二次读取操作期间检测到的每个位的软信息，并对在第一和第二读取操作来确定每个位的值。

4. 发明申请

US20080043356A1 Read error recovery using soft information 有权
标题翻译：使用软信息读取错误恢复
公开(公告)号：US20080043356A1
公开(公告)日：2008-02-21
申请号：US11507063
申请日：2006-08-18
申请人： Ming Jin , Hiau Choon Kee , Myint Ngwe , Liu Li
发明人： Ming Jin , Hiau Choon Kee , Myint Ngwe , Liu Li
IPC分类号： G11B20/10
CPC分类号： G11B20/18 , G11B20/10296 , G11B2020/183 , G11B2220/2516
摘要： In general, this disclosure describes read recovery techniques for data storage devices that use soft information associated with multiple read operations to detect data. Specifically, the read recovery techniques comprise computing soft information for each bit detected during a first read operation of a data storage medium, computing soft information for each bit detected during a second read operation of the data storage medium and averaging the soft information computed during the first and second read operations to determine the value of each of the bits.
摘要翻译：通常，本公开描述了使用与多个读取操作相关联的软信息来检测数据的数据存储设备的读取恢复技术。具体地，读取恢复技术包括计算在数据存储介质的第一次读取操作期间检测到的每个位的软信息，计算在数据存储介质的第二次读取操作期间检测到的每个位的软信息，并对在第一和第二读取操作来确定每个位的值。

5. 发明授权

US06731442B2 Method and apparatus for detecting media defects 有权
标题翻译：用于检测介质缺陷的方法和装置
公开(公告)号：US06731442B2
公开(公告)日：2004-05-04
申请号：US10066231
申请日：2002-01-31
申请人： Ming Jin , Myint Ngwe , David Loh , Quek Leong Choo , Mingyou Hu
发明人： Ming Jin , Myint Ngwe , David Loh , Quek Leong Choo , Mingyou Hu
IPC分类号： G11B2736
CPC分类号： G11B20/1883 , G11B20/182
摘要： A method is disclosed for detecting defects in a recordable medium such as a hard disc drive based on error energy. The method may include the steps of writing test data to the medium and reading back the test data. The method may also include the steps of computing an error energy based on the square of the difference between the read back data and an ideal version of the test data and comparing the error energy with an energy threshold. The method generates a defect signal when the error energy exceeds the energy threshold. The method may also be used to identify the media defect according to its error energy profile. An apparatus for detecting defects in a recordable medium is also disclosed.
摘要翻译：公开了一种用于基于误差能量来检测诸如硬盘驱动器的可记录介质中的缺陷的方法。该方法可以包括将测试数据写入介质并读回测试数据的步骤。该方法还可以包括以下步骤：基于回读数据和测试数据的理想版本之间的差的平方来计算误差能量，并将误差能量与能量阈值进行比较。当误差能量超过能量阈值时，该方法产生缺陷信号。该方法还可以用于根据其误差能量分布来识别介质缺陷。还公开了一种用于检测可记录介质中的缺陷的装置。

6. 发明申请

US20080298197A1 CONTROLLING A HEAT RESISTIVE ELEMENT WITH A PULSE MODULATED SIGNAL 有权
标题翻译：用脉冲调制信号控制耐热元件
公开(公告)号：US20080298197A1
公开(公告)日：2008-12-04
申请号：US11756727
申请日：2007-06-01
申请人： Chee Wee Cheng , Beng Theam Ko , Liu Li , Zhen Yu Sun , Myint Ngwe
发明人： Chee Wee Cheng , Beng Theam Ko , Liu Li , Zhen Yu Sun , Myint Ngwe
IPC分类号： G11B5/76
CPC分类号： G11B33/1406 , G11B5/40
摘要： The disclosure is related to pulse width modulating a power signal to a heat resistive element of a transducer. The power signal may be a power output signal of preamplifier. The power signal may be provided to a heat resistive element in a transducer that is operable to read data from or write data to a data storage medium. The pulse width modulated power signal can allow for controlling the heating of the heat resistive element based on a thermal time constant of the heat resistive element and based on adjustable components of the pulse width modulated power signal.
摘要翻译：本公开涉及将功率信号调制到换能器的耐热元件的脉冲宽度。功率信号可以是前置放大器的功率输出信号。功率信号可以被提供给换能器中的耐热元件，其可操作以从数据存储介质读取数据或向数据存储介质写入数据。脉冲宽度调制功率信号可以允许基于耐热元件的热时间常数并且基于脉宽调制功率信号的可调组件控制加热电阻元件的加热。

7. 发明申请

US20080115038A1 Dynamic early termination of iterative decoding for turbo equalization 审中-公开
标题翻译：动态提前终止Turbo均衡的迭代解码
公开(公告)号：US20080115038A1
公开(公告)日：2008-05-15
申请号：US11589264
申请日：2006-10-26
申请人： Hiau Choon Kee , Ming Jin , Zhen Yu Sun , Myint Ngwe
发明人： Hiau Choon Kee , Ming Jin , Zhen Yu Sun , Myint Ngwe
IPC分类号： H03M13/00
CPC分类号： H03M13/2975 , H03M13/15 , H03M13/1515 , H03M13/19 , H03M13/2957 , H03M13/4146 , H03M13/6343
摘要： A method and apparatus for selectively terminating turbo equalization is disclosed. At least two iterations of turbo equalization are performed. The number of errors corrected between the first iteration and the second iteration are calculated. In one embodiment, if the sign of corresponding bits in the data block is different between the two iterations, an error was corrected. If the number of errors corrected is greater than a stopping value, a subsequent iteration of turbo equalization is performed. If the number of errors corrected is less than or equal to the stopping value, then associated values for the data are output and the turbo equalization is terminated.
摘要翻译：公开了一种用于选择性地终止turbo均衡的方法和装置。进行turbo均衡的至少两次迭代。计算第一次迭代和第二次迭代之间纠正的错误数。在一个实施例中，如果数据块中的相应位的符号在两次迭代之间是不同的，则纠正错误。如果校正的误差数大于停止值，则进行turbo均衡的后续迭代。如果纠错的数量小于或等于停止值，则输出数据的相关值，并终止turbo均衡。

8. 发明授权

US08159771B2 Controlling a heat resistive element with a pulse modulated signal 有权
标题翻译：用脉冲调制信号控制耐热元件
公开(公告)号：US08159771B2
公开(公告)日：2012-04-17
申请号：US11756727
申请日：2007-06-01
申请人： Chee Wee Cheng , Beng Theam Ko , Liu Li , Zhen Yu Sun , Myint Ngwe
发明人： Chee Wee Cheng , Beng Theam Ko , Liu Li , Zhen Yu Sun , Myint Ngwe
IPC分类号： G11B5/147
CPC分类号： G11B33/1406 , G11B5/40
摘要： The disclosure is related to pulse width modulating a power signal to a heat resistive element of a transducer. The power signal may be a power output signal of preamplifier. The power signal may be provided to a heat resistive element in a transducer that is operable to read data from or write data to a data storage medium. The pulse width modulated power signal can allow for controlling the heating of the heat resistive element based on a thermal time constant of the heat resistive element and based on adjustable components of the pulse width modulated power signal.
摘要翻译：本公开涉及将功率信号调制到换能器的耐热元件的脉冲宽度。功率信号可以是前置放大器的功率输出信号。功率信号可以被提供给换能器中的耐热元件，其可操作以从数据存储介质读取数据或向数据存储介质写入数据。脉冲宽度调制功率信号可以允许基于耐热元件的热时间常数并且基于脉宽调制功率信号的可调组件控制加热电阻元件的加热。

9. 发明授权

US06903889B2 Method and apparatus for tuning a magnetoresistive bias parameter in a data storage system 失效
标题翻译：用于调整数据存储系统中的磁阻偏置参数的方法和装置
公开(公告)号：US06903889B2
公开(公告)日：2005-06-07
申请号：US10461558
申请日：2003-06-11
申请人： Liu Li , Quek Leong Choo , Song Wee Teo , Myint Ngwe , Beng Wee Quak
发明人： Liu Li , Quek Leong Choo , Song Wee Teo , Myint Ngwe , Beng Wee Quak
IPC分类号： G11B5/00 , G11B5/012 , G11B20/10 , G11B27/36
CPC分类号： G11B20/10481 , G11B5/00 , G11B5/012 , G11B20/10009 , G11B27/36 , G11B2005/001 , G11B2005/0016 , G11B2005/0018 , G11B2220/20
摘要： A method of tuning a bias parameter for a magnetoresistive head in a data storage system includes the step of identifying, from multiple possible bias parameter values, a smallest bias parameter value for the magnetoresistive head which both maintains a bit error rate above a predetermined threshold bit error rate, and which satisfies a second criteria. The method then includes the step of setting an operational bias parameter value for the magnetoresistive head to the identified smallest bias parameter value. Also disclosed are data storage systems, or controllers which are connectable to or included with data storage systems, configured to implement the methods.
摘要翻译：调整数据存储系统中的磁阻头的偏置参数的方法包括从多个可能的偏置参数值中识别用于磁阻头的最小偏置参数值的步骤，所述最小偏置参数值都保持高于预定阈值位的误码率错误率，满足第二个标准。该方法然后包括将磁阻头的操作偏置参数值设置为所识别的最小偏置参数值的步骤。还公开了数据存储系统或可连接到数据存储系统或包括在数据存储系统中的控制器，被配置为实现这些方法。

10. 发明授权

US06952321B1 Method for sensing run-out in data fields 失效
标题翻译：用于感测数据字段中的耗尽的方法
公开(公告)号：US06952321B1
公开(公告)日：2005-10-04
申请号：US10119985
申请日：2002-04-10
申请人： EngHock Lim , BengTheam Ko , Jun Wang , MingYou Hu , Myint Ngwe
发明人： EngHock Lim , BengTheam Ko , Jun Wang , MingYou Hu , Myint Ngwe
IPC分类号： G11B5/596 , G11B21/02
CPC分类号： G11B5/59627
摘要： A method of determining run-out in a disc drive involving steps of performing a direct current erase, selecting a reference track, writing a sinusoidal signal into a first track at a first offset from the reference track, sensing a read signal along the reference track, and analyzing the read signal to extract run-out information.
摘要翻译：一种确定磁盘驱动器中的耗尽的方法，包括执行直流擦除，选择参考磁道，在与参考磁道的第一偏移处将第一磁道写入正弦信号的步骤，沿着参考磁道感测读取信号，并分析读取信号以提取耗尽信息。

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