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1. 发明授权

US06809894B2 Method and apparatus for handling end of data processing in a data storage device 有权
标题翻译：一种处理数据存储装置中的数据处理结束的方法和装置
公开(公告)号：US06809894B2
公开(公告)日：2004-10-26
申请号：US09896135
申请日：2001-06-29
申请人： William G. Bliss , Razmik Karabed , James W. Rae , Heiner Stockmanns , Kaichi Zhang
发明人： William G. Bliss , Razmik Karabed , James W. Rae , Heiner Stockmanns , Kaichi Zhang
IPC分类号： G11B509
CPC分类号： G11B20/1217 , G11B20/10009 , G11B2220/2516
摘要： A method and apparatus for handling end of data processing in a data storage device. The method includes receiving a plurality of user data bits at a write channel. The method further includes appending primary padding bits to user data bits if the plurality of user data bits is less than a multiple of an input block length of an encoder in the write channel and encoding the plurality of user data bits and any primary padding bits into a plurality of encoded data bytes. Additionally, the method includes appending an end of data marker to an end of the plurality of encoded data bytes, wherein the end of data marker has a length of no more than one byte, and writing the plurality of encoded data bytes and the end of data marker to the data store.
摘要翻译：一种处理数据存储装置中的数据处理结束的方法和装置。该方法包括在写入通道处接收多个用户数据位。该方法还包括：如果多个用户数据位小于写通道中编码器的输入块长度的倍数，并将多个用户数据位和任何主填充位编码为多个，则将主填充位附加到用户数据位多个编码数据字节。此外，该方法包括将数据标记的结尾附加到多个编码数据字节的末尾，其中数据标记的结尾具有不超过一个字节的长度，并写入多个编码数据字节和结束数据标记到数据存储。

2. 发明授权

US06788482B2 Method and apparatus for Viterbi detector state metric re-normalization 有权
标题翻译：维特比检测器状态度量重新归一化的方法和装置
公开(公告)号：US06788482B2
公开(公告)日：2004-09-07
申请号：US09896134
申请日：2001-06-29
申请人： William G. Bliss , Razmik Karabed , James W. Rae , Heiner Stockmanns
发明人： William G. Bliss , Razmik Karabed , James W. Rae , Heiner Stockmanns
IPC分类号： G11B509
CPC分类号： H03M13/6343 , G11B20/10009 , H03M13/3961 , H03M13/4107 , H03M13/6502 , H03M13/6583
摘要： A method and apparatus for Viterbi detector state metric re-normalization. The method includes fabricating a Viterbi detector (138) having a predetermined number of states, wherein the Viterbi detector (138) stores a state metric value and a branch metric value for each state, and wherein the Viterbi detector (138) implements a trellis diagram. The method includes constructing a Viterbi detector (138) which can support a state metric value having g+h′ number of bits. The number of bits needed to represent the branch metric value is represented by (g) and the additional number of bits needed to represent the state metric value is represented by (h′). The additional number of bits (h′) is less than the additional number of bits (h) determined using the following inequality: 2h−1−h≧K−1, wherein K represent the constraint length of the trellis diagram.
摘要翻译：一种用于维特比检测器状态度量重新归一化的方法和装置。该方法包括制造具有预定数量状态的维特比检测器（138），其中维特比检测器（138）存储每个状态的状态度量值和分支度量值，并且其中维特比检测器（138）实现格状图。该方法包括构造可支持具有g + h'比特数的状态度量值的维特比检测器（138）。表示分支量度值所需的位数由（g）表示，表示状态量度值所需的附加位数由（h'）表示。附加位数（h'）小于使用以下不等式确定的附加位数（h）：2 -h> = K-1，其中K表示网格图的约束长度。

3. 发明授权

US06771442B2 Off-track interference emulator 有权
标题翻译：离线干扰仿真器
公开(公告)号：US06771442B2
公开(公告)日：2004-08-03
申请号：US09896885
申请日：2001-06-29
申请人： William G. Bliss , James W. Rae
发明人： William G. Bliss , James W. Rae
IPC分类号： G11B509
CPC分类号： G11B20/10481 , G11B5/012 , G11B5/09 , G11B20/10009 , G11B20/1816 , G11B27/36 , G11B2220/20
摘要： An apparatus and method for adding errors to magnetic data and then detecting the errors is revealed. The method includes providing a magnetic recording channel, reading and digitizing a stored signal, introducing an error signal that emulates off-track interference, adding the error to the digitized signal, and determining an error rate. The apparatus includes a magnetic recording channel having a linear feedback shift register to generate a pseudo-random binary sequence, circuitry to convert the sequence into an error signal, and a Viterbi detector to quantify an error rate.
摘要翻译：揭示了一种用于向磁数据添加错误然后检测错误的装置和方法。该方法包括提供磁记录通道，读取和数字化存储的信号，引入模拟偏离轨道干扰的误差信号，将误差加到数字化信号上，并确定错误率。该装置包括具有线性反馈移位寄存器以产生伪随机二进制序列的磁记录通道，将该序列转换为误差信号的电路以及量化误码率的维特比检测器。

4. 发明授权

US06731443B2 Total error multiplier for optimizing read/write channel 有权
标题翻译：用于优化读/写通道的总误差乘数
公开(公告)号：US06731443B2
公开(公告)日：2004-05-04
申请号：US09896640
申请日：2001-06-29
申请人： William G. Bliss , James W. Rae
发明人： William G. Bliss , James W. Rae
IPC分类号： G11B509
CPC分类号： G11B20/1816 , G11B20/10009 , G11B20/22
摘要： A method and apparatus to optimize a bit error rate for a partial response, maximum likelihood (“PRML”) read/write channel is disclosed. A channel margining circuit that is configured to carry out an embodiment for a method of optimizing the bit error rates of a read/write channel is described. The margining circuit derives an interference signal to stress a read/write channel for optimizing the bit error rate. The signal is derived from bit errors inherent with the read/write channel. The circuit reduces the time to optimize the channel by providing an amplified interference signal that increases a bit error rate during optimization.
摘要翻译：公开了一种用于优化部分响应，最大似然（“PRML”）读/写通道的误码率的方法和装置。描述了被配置为执行用于优化读/写通道的误码率的方法的实施例的信道余量电路。边缘电路导出干扰信号，以压缩读/写通道，以优化误码率。该信号来自读/写通道固有的位错误。该电路通过提供在优化期间增加误码率的放大干扰信号来减少对信道优化的时间。

5. 发明授权

US07743314B2 Method and apparatus for a data-dependent noise predictive viterbi 有权
标题翻译：用于数据相关噪声预测维特比的方法和装置
公开(公告)号：US07743314B2
公开(公告)日：2010-06-22
申请号：US11607492
申请日：2006-12-01
申请人： Heinrich J. Stockmanns , William G. Bliss , Razmik Karabed , James W. Rae
发明人： Heinrich J. Stockmanns , William G. Bliss , Razmik Karabed , James W. Rae
IPC分类号： H03M13/03
CPC分类号： G11B20/10296 , G11B20/10009
摘要： An improved Viterbi detector is disclosed in which each branch metric is calculated based on noise statistics that depend on the signal hypothesis corresponding to the branch. Also disclosed is a method of reducing the complexity of the branch metric calculations by clustering branches corresponding to signals with similar signal-dependent noise statistics. A feature of this architecture is that the branch metrics (and their corresponding square difference operators) are clustered into multiple groups, where all the members of each group draw input from a single, shared noise predictive filter corresponding to the group. In recording technologies as practiced today, physical imperfections in the representation of recorded user data in the recording medium itself are becoming the dominate source of noise in the read back data. This noise is highly dependent on what was (intended to be) written in the medium. The disclosed Viterbi detector exploits this statistical dependence of the noise on the signal.
摘要翻译：公开了一种改进的维特比检测器，其中基于依赖于与分支对应的信号假设的噪声统计来计算每个分支度量。还公开了一种通过对与具有相似的信号相关噪声统计信号的信号进行聚类的分支来降低分支度量计算的复杂度的方法。该架构的一个特点是分支度量（及其对应的平方差运算符）被聚集成多个组，其中每个组的所有成员从与组相对应的单个共享噪声预测滤波器中绘制输入。在今天所采用的记录技术中，在记录介质本身中记录的用户数据的表示中的物理缺陷正在回读数据中成为主要的噪声源。这种噪音很大程度上取决于介质中写的内容。所公开的维特比检测器利用噪声对信号的统计依赖性。

6. 发明授权

US08015477B2 Method and apparatus for a data-dependent noise predictive viterbi 有权
标题翻译：用于数据相关噪声预测维特比的方法和装置
公开(公告)号：US08015477B2
公开(公告)日：2011-09-06
申请号：US12819993
申请日：2010-06-21
申请人： Heinrich J. Stockmanns , William G. Bliss , Razmik Karabed , James W. Rae
发明人： Heinrich J. Stockmanns , William G. Bliss , Razmik Karabed , James W. Rae
IPC分类号： H03M13/03
CPC分类号： G11B20/10296 , G11B20/10009
摘要： An improved Viterbi detector is disclosed in which each branch metric is calculated based on noise statistics that depend on the signal hypothesis corresponding to the branch. Also disclosed is a method of reducing the complexity of the branch metric calculations by clustering branches corresponding to signals with similar signal-dependent noise statistics. A feature of this architecture is that the branch metrics (and their corresponding square difference operators) are clustered into multiple groups, where all the members of each group draw input from a single, shared noise predictive filter corresponding to the group. In recording technologies as practiced today, physical imperfections in the representation of recorded user data in the recording medium itself are becoming the dominate source of noise in the read back data. This noise is highly dependent on what was (intended to be) written in the medium. The disclosed Viterbi detector exploits this statistical dependence of the noise on the signal.
摘要翻译：公开了一种改进的维特比检测器，其中基于依赖于与分支对应的信号假设的噪声统计来计算每个分支度量。还公开了一种通过对与具有相似的信号相关噪声统计信号的信号进行聚类的分支来降低分支度量计算的复杂度的方法。该架构的一个特点是分支度量（及其对应的平方差运算符）被聚集成多个组，其中每个组的所有成员从与组相对应的单个共享噪声预测滤波器中绘制输入。在今天所采用的记录技术中，在记录介质本身中记录的用户数据的表示中的物理缺陷正在回读数据中成为主要的噪声源。这种噪音很大程度上取决于介质中写的内容。所公开的维特比检测器利用噪声对信号的统计依赖性。

7. 发明申请

US20100322359A1 METHOD AND APPARATUS FOR A DATA-DEPENDENT NOISE PREDICTIVE VITERBI 有权
标题翻译：数据依赖性噪声预测VITERBI的方法和装置
公开(公告)号：US20100322359A1
公开(公告)日：2010-12-23
申请号：US12819993
申请日：2010-06-21
申请人： Heinrich J. Stockmanns , William G. Bliss , Razmik Karabed , James W. Rae
发明人： Heinrich J. Stockmanns , William G. Bliss , Razmik Karabed , James W. Rae
IPC分类号： H04L27/06
CPC分类号： G11B20/10296 , G11B20/10009
摘要： An improved Viterbi detector is disclosed in which each branch metric is calculated based on noise statistics that depend on the signal hypothesis corresponding to the branch. Also disclosed is a method of reducing the complexity of the branch metric calculations by clustering branches corresponding to signals with similar signal-dependent noise statistics. A feature of this architecture is that the branch metrics (and their corresponding square difference operators) are clustered into multiple groups, where all the members of each group draw input from a single, shared noise predictive filter corresponding to the group. In recording technologies as practiced today, physical imperfections in the representation of recorded user data in the recording medium itself are becoming the dominate source of noise in the read back data. This noise is highly dependent on what was (intended to be) written in the medium. The disclosed Viterbi detector exploits this statistical dependence of the noise on the signal.
摘要翻译：公开了一种改进的维特比检测器，其中基于依赖于与分支对应的信号假设的噪声统计来计算每个分支度量。还公开了一种通过对与具有相似的信号相关噪声统计信号的信号进行聚类的分支来降低分支度量计算的复杂度的方法。该架构的一个特点是分支度量（及其对应的平方差运算符）被聚集成多个组，其中每个组的所有成员从与组相对应的单个共享噪声预测滤波器中绘制输入。在今天所采用的记录技术中，在记录介质本身中记录的用户数据的表示中的物理缺陷正在回读数据中成为主要的噪声源。这种噪音很大程度上取决于介质中写的内容。所公开的维特比检测器利用噪声对信号的统计依赖性。

8. 发明授权

US07907359B2 Finite field based short error propagation modulation codes 有权
标题翻译：基于有限域的短误差传播调制码
公开(公告)号：US07907359B2
公开(公告)日：2011-03-15
申请号：US12345561
申请日：2008-12-29
申请人： William G. Bliss , Razmik Karabed
发明人： William G. Bliss , Razmik Karabed
IPC分类号： G11B5/02 , G11B20/06 , G11B20/08 , G11B5/09 , G11B15/52 , G11B19/02 , G11B20/00
CPC分类号： G11B20/10194 , G11B20/10009 , G11B20/1426 , G11B20/1833 , G11B2220/2516
摘要： The invention relates to a data modulation method applicable to make data streams tend to have desired properties, useful for clock recovery, making signals more distinguishable, or enforcing run-length conditions. A stream of input data and a corresponding stream of output data are grouped into elements of a finite field. Input elements of said input data are modified by a transform generating output elements of the output data, such that a current output element is a linear combination of a current input element and at least one previous output element. A multiplier applied to at least one previous output element is a non-zero and non-unity element of the finite field. A set of initial conditions inherent to the transform, is selected such that the output elements resulting from the transform tend to have the desired property.
摘要翻译：本发明涉及一种适用于使数据流倾向于具有期望属性的数据调制方法，对于时钟恢复有用，使得信号更可区分，或者执行运行长度条件。输入数据流和相应的输出数据流被分组成有限域的元素。通过产生输出数据的输出元件的变换来修改所述输入数据的输入元件，使得当前输出元件是当前输入元件和至少一个先前输出元件的线性组合。应用于至少一个先前输出元素的乘数是有限域的非零和非单位元素。选择变换固有的一组初始条件，使得由变换产生的输出元素倾向于具有期望的属性。

9. 发明授权

US07486456B2 Finite field based short error propagation modulation codes 有权
标题翻译：基于有限域的短误差传播调制码
公开(公告)号：US07486456B2
公开(公告)日：2009-02-03
申请号：US11016283
申请日：2004-12-17
申请人： William G. Bliss , Razmik Karabed
发明人： William G. Bliss , Razmik Karabed
IPC分类号： G11B5/02 , G11B20/06 , G11B20/08 , G11B5/09 , G11B15/52 , G11B19/02 , G11B20/00
CPC分类号： G11B20/10194 , G11B20/10009 , G11B20/1426 , G11B20/1833 , G11B2220/2516
摘要： The invention relates to a data modulation method applicable to make data streams tend to have desired properties, useful for clock recovery, making signals more distinguishable, or enforcing run-length conditions. A stream of input data and a corresponding stream of output data are grouped into elements of a finite field. Input elements of said input data are modified by a transform generating output elements of the output data, such that a current output element is a linear combination of a current input element and at least one previous output element. A multiplier applied to at least one previous output element is a non-zero and non-unity element of the finite field. A set of initial conditions inherent to the transform, is selected such that the output elements resulting from the transform tend to have the desired property.
摘要翻译：本发明涉及一种适用于使数据流倾向于具有期望属性的数据调制方法，对于时钟恢复有用，使得信号更可区分，或者执行运行长度条件。输入数据流和相应的输出数据流被分组成有限域的元素。通过产生输出数据的输出元件的变换来修改所述输入数据的输入元件，使得当前输出元件是当前输入元件和至少一个先前输出元件的线性组合。应用于至少一个先前输出元素的乘数是有限域的非零和非单位元素。选择变换固有的一组初始条件，使得由变换产生的输出元素倾向于具有期望的属性。

10. 发明授权

US07274312B2 High rate coding for media noise 有权
标题翻译：高速编码媒体噪声
公开(公告)号：US07274312B2
公开(公告)日：2007-09-25
申请号：US11359453
申请日：2006-04-06
申请人： William G. Bliss , Andrei Vityaev , Razmik Karabed
发明人： William G. Bliss , Andrei Vityaev , Razmik Karabed
IPC分类号： H03M7/00
CPC分类号： G11B20/1426 , G11B20/10009 , G11B20/1833 , G11B2020/1446 , H03M5/145 , H03M13/093
摘要： An apparatus has a conversion circuit, a precoder circuit, and a selection circuit. The conversion circuit converts user data b1, b2, b. . . bk to a coded sequence c0, c1, c2 . . . cq. The selection circuit selects c0 in the coded sequence c0, c1, c2 . . . cq such that the output of the precoder circuit has less than a maximum number q of transitions. The conversion circuit may include an encoder circuit to convert user data b1, b2, b3 . . . bk to a sequence c1, c2 . . . cq, and a transition minimization circuit to add c0 to the sequence c1, c2 . . . cq. The apparatus may have a circuit to add at least one additional bit, which may be a parity bit, to the coded sequence c0, c1, c2 . . . cq.
摘要翻译：一种装置具有转换电路，预编码器电路和选择电路。转换电路转换用户数据b 1，b 2，b。。。对于编码序列c 0，c 1，c 2，...，。。 c 。选择电路在编码序列c 0 0，c 1，c 2 2中选择c <0> 0 。。。使得预编码器电路的输出具有小于转换的最大数量q。转换电路可以包括用于转换用户数据b 1，b 2，b 3 3的编码器电路。。。 c 到序列c 1，c 2。。。以及向序列c 1，c 2 2加上c 0的转换最小化电路。。。 c 。该装置可以具有电路，用于将至少一个额外的位（其可以是奇偶校验位）添加到编码序列c 0，c 1，c 2 。。。 c 。

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