公开(公告)号：US20100177422A1

公开(公告)日：2010-07-15

申请号：US12351747

申请日：2009-01-09

申请人： Roy D. Cideciyan ,  Evangelos S. Eleftheriou ,  Hisato Matsuo ,  Thomas Mittelholzer ,  Paul J. Seger ,  Keisuke Tanaka

发明人： Roy D. Cideciyan ,  Evangelos S. Eleftheriou ,  Hisato Matsuo ,  Thomas Mittelholzer ,  Paul J. Seger ,  Keisuke Tanaka

IPC分类号： G11B5/09 ,  G11B5/78

CPC分类号： G11B20/1833 ,  G11B20/1201 ,  G11B20/1866 ,  G11B2020/1287 ,  G11B2020/1289 ,  G11B2020/1446 ,  G11B2020/1836 ,  G11B2220/93 ,  H03M13/27 ,  H03M13/271

摘要： For writing data to multi-track tape, a received data set is received and segmented into unencoded subdata sets, each comprising an array having K2 rows and K1 columns. For each unencoded subdata set, N1−K1 C1-parity bytes are generated for each row and N2−K2 C2-parity bytes are generated for each column. The C1 and C2 parity bytes are appended to the ends of the row and column, respectively, to form encoded C1 and C2 codewords, respectively. All of the C1 codewords per data set are endowed with a specific codeword header to form a plurality of partial codeword objects (PCOs). Each PCO is mapped onto a logical data track according to information within the header. On each logical data track, adjacent PCOs are merged to form COs which are modulation encoded and mapped into synchronized COs. Then T synchronized COs are written simultaneously to the data tape where T is the number of concurrent active tracks on the data tape.

摘要翻译： 为了将数据写入多轨磁带，接收到的数据集并被分割成未编码的子数据集，每个子​​集包括具有K2行和K1列的阵列。 对于每个未编码的子数据集，为每行生成N1-K1 C1-奇偶校验字节，并为每列生成N2-K2 C2-奇偶校验字节。 C1和C2奇偶校验字节分别附加到行和列的末端，分别形成编码的C1和C2码字。 每个数据集的所有C1码字都具有特定的码字头以形成多个部分码字对象（PCO）。 每个PCO根据标题内的信息被映射到逻辑数据轨道上。 在每个逻辑数据轨道上，相邻的PCO被合并以形成被调制编码并被映射到同步的CO中的CO。 然后将T同步的CO同时写入数据磁带，其中T是数据磁带上的并发活动磁道的数量。

公开(公告)号：US20080284624A1

公开(公告)日：2008-11-20

申请号：US11749711

申请日：2007-05-16

申请人： Roy D. Cideciyan ,  Evangelos S. Eleftheriou ,  Thomas Mittelholzer ,  Paul J. Seger ,  Keisuke Tanaka

发明人： Roy D. Cideciyan ,  Evangelos S. Eleftheriou ,  Thomas Mittelholzer ,  Paul J. Seger ,  Keisuke Tanaka

IPC分类号： H03M7/00

CPC分类号： H03M5/145 ,  G11B20/1426 ,  G11B2020/1446 ,  G11B2020/1473 ,  G11B2220/90 ,  G11B2220/956

摘要： An unencoded m-bit data input sequence is divided into a block of n bits and a block of m−n bits. The block of n bits is divided into a first set of n+1 encoded bits, wherein at least one of P1 subblocks of the first set satisfies a G, M and I constraints. The first set of n+1 encoded bits is mapped into a second set of n+1 encoded bits wherein at least one of P2 subblocks of the second set gives rise to at least Q1 transitions after 1/(1+D2) preceding. A second set of n+1 encoded bits is divided into P3 encoded subblocks and the P3 encoded subblocks are interleaved among (m−n)/s unencoded symbols so as to form a (m+1)-bit output sequence codeword which is then stored on a data storage medium.

摘要翻译： 未编码的m位数据输入序列被分成n位块和m-n位块。 n位的块被划分为第一组n + 1个编码比特，其中第一组的P1个子块中的至少一个满足G，M和I约束。 第一组n + 1个编码比特被映射到n + 1编码比特的第二组，其中第二组的P2个子块中的至少一个在1 /（1 + D 2）之后产生至少Q1个转换 ）。 第二组n + 1编码比特被分成P3编码子块，并且P3编码子块在（mn）/ s个未编码符号之间进行交织，以形成第（m + 1）比特的输出序列码字，然后存储在 数据存储介质。

公开(公告)号：US07813070B2

公开(公告)日：2010-10-12

申请号：US12033440

申请日：2008-02-19

申请人： Roy D. Cideciyan ,  Evangelos S. Eleftheriou ,  Paul J. Seger

发明人： Roy D. Cideciyan ,  Evangelos S. Eleftheriou ,  Paul J. Seger

IPC分类号： G11B5/09

CPC分类号： G11B20/1201 ,  G11B5/584 ,  G11B20/14 ,  G11B20/1833 ,  G11B2020/1281 ,  G11B2020/1284 ,  G11B2020/1287 ,  G11B2020/1484 ,  G11B2220/90 ,  G11B2220/93 ,  G11B2220/95

摘要： A longitudinal position (LPOS) word L(n) is encoded with error correction capability. The LPOS word includes a plurality of LPOS symbols L0(n) through Lk(n) calculated as L ⁡ ( n ) = ∑ i = 0 5 ⁢ L i ⁡ ( n ) ⁢ 14 i and representing a longitudinal position of a magnetic tape relative to a tape head in a tape storage system. A word type is determined in response to at least one of the plurality of LPOS symbols and, in response to the determined word type, at least one formatted symbol F(n) is generated from the plurality of LPOS symbols L(n). At least one parity symbol P(n) is generated from the formatted symbol F(n). The formatted and parity symbols are communicated to a servo channel of the tape storage system to be recorded onto a servo track of the magnetic tape. Adding redundancy to LPOS words provides the capability of correcting multiple bit errors without increasing the LPOS word length.

摘要翻译： 纵向位置（LPOS）字L（n）被编码具有纠错能力。 LPOS字包括计算为L⁡（n）=Σi = 0 5 L i⁡（n）14 i的多个LPOS符号L0（n）至Lk（n），并表示磁带的纵向位置 相对于磁带存储系统中的磁带头。 响应于多个LPOS符号中的至少一个确定字类型，并且响应于所确定的字类型，从多个LPOS符号L（n）生成至少一个格式化符号F（n）。 从格式化符号F（n）生成至少一个奇偶校验符号P（n）。 格式化和奇偶校验符号被传送到磁带存储系统的伺服通道以被记录在磁带的伺服轨道上。 向LPOS字添加冗余可提供校正多位错误而不增加LPOS字长度的能力。

公开(公告)号：US20080256423A1

公开(公告)日：2008-10-16

申请号：US12141962

申请日：2008-06-19

申请人： Roy D. Cideciyan ,  Evangelos S. Eleftheriou ,  Glen A. Jaquette ,  Paul J. Seger

发明人： Roy D. Cideciyan ,  Evangelos S. Eleftheriou ,  Glen A. Jaquette ,  Paul J. Seger

IPC分类号： H03M13/13 ,  G06F11/10

CPC分类号： G11B20/1201 ,  G11B20/18 ,  G11B20/1866 ,  G11B20/20 ,  G11B2020/1282 ,  G11B2020/1284 ,  G11B2220/90

摘要： A method and apparatus for providing error correction capability to longitudinal position data are disclosed. Initially, data are encoded via a set of even LPOS words and a set of odd LPOS words. The encoded data are then decoded by generating a set of syndrome bits for each of the LPOS words. A determination is then made as to whether or not there is an error within one of the LPOS words based on its corresponding syndrome bits.

摘要翻译： 公开了一种向纵向位置数据提供纠错能力的方法和装置。 最初，通过一组偶数LPOS字和一组奇数LPOS字对数据进行编码。 然后通过为每个LPOS字生成一组校正子位来解码编码数据。 然后，基于其对应的校正子位确定是否存在LPOS字之一内的错误。

公开(公告)号：US20090207515A1

公开(公告)日：2009-08-20

申请号：US12033440

申请日：2008-02-19

申请人： Roy D. Cideciyan ,  Evangelos S. Eleftheriou ,  Paul J. Seger

发明人： Roy D. Cideciyan ,  Evangelos S. Eleftheriou ,  Paul J. Seger

IPC分类号： G11B27/36

CPC分类号： G11B20/1201 ,  G11B5/584 ,  G11B20/14 ,  G11B20/1833 ,  G11B2020/1281 ,  G11B2020/1284 ,  G11B2020/1287 ,  G11B2020/1484 ,  G11B2220/90 ,  G11B2220/93 ,  G11B2220/95

摘要： A longitudinal position (LPOS) word L(n) is encoded with error correction capability. The LPOS word includes a plurality of LPOS symbols L0(n) through Lk(n) calculated as L  ( n ) = ∑ i = 0 5  L i  ( n )  14 i and representing a longitudinal position of a magnetic tape relative to a tape head in a tape storage system. A word type is determined in response to at least one of the plurality of LPOS symbols and, in response to the determined word type, at least one formatted symbol F(n) is generated from the plurality of LPOS symbols L(n). At least one parity symbol P(n) is generated from the formatted symbol F(n). The formatted and parity symbols are communicated to a servo channel of the tape storage system to be recorded onto a servo track of the magnetic tape. Adding redundancy to LPOS words provides the capability of correcting multiple bit errors without increasing the LPOS word length.

摘要翻译： 纵向位置（LPOS）字L（n）被编码具有纠错能力。 LPOS字包括以下计算的多个LPOS符号L0（n）至Lk（n）：