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公开(公告)号：US20080235562A1
公开(公告)日：2008-09-25
申请号：US11690635
申请日：2007-03-23
IPC分类号： H03M13/00
CPC分类号： G11B20/1426 , G11B20/1833 , G11B2020/1446 , G11B2220/2516 , G11B2220/90
摘要： Method and computer program product are provided to encode data for recording onto media whereby modulation and linear constraints from a concatenated code or product code are imposed. A first array of unencoded user data is generated. Each row is modulation encoded to enforce a first modulation constraint; the array is transformed into a second array which is transformed into a third array having predetermined empty locations in each column interleaved with the modulated data. A C2-parity byte is computed for at least some of the empty locations of the third array and a fourth array is generated. C1-parity symbols in each row are computed, generating a fifth array. A second modulation constraint is enforced on each C1-parity symbol in each row of the fifth array, generating a sixth array. The rows of the sixth array are assembled with header and sync fields for recording onto a recording media.
摘要翻译： 提供方法和计算机程序产品以对用于记录到介质上的数据进行编码，从而施加来自级联代码或产品代码的调制和线性约束。 生成第一组未编码的用户数据。 每行被调制编码以执行第一调制约束; 该阵列被变换成第二阵列，该第二阵列被转换成具有与调制数据交错的每列中的预定空位置的第三阵列。 对于第三阵列的至少一些空位置计算C2奇偶校验字节，并且生成第四阵列。 计算每行中的C1奇偶校验符号，生成第五个数组。 在第五阵列的每行中的每个C1奇偶校验符号上强制执行第二调制约束，产生第六阵列。 第六阵列的行与标题和同步字段组合，用于记录到记录介质上。
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公开(公告)号：US20080235556A1
公开(公告)日：2008-09-25
申请号：US11690619
申请日：2007-03-23
IPC分类号： H03M13/00
CPC分类号： H03M13/15 , G11B20/1426 , H03M13/2707 , H03M13/2721 , H03M13/275 , H03M13/2792 , H03M13/2909 , H03M13/53
摘要： A system is provided to encode data for recording onto media whereby modulation and linear constraints from a concatenated code or product code are imposed. A first array of unencoded user data is generated. Each row is modulation encoded to enforce a first modulation constraint; the array is transformed into a second array which is transformed into a third array having predetermined empty locations in each column interleaved with the modulated data. A C2-parity byte is computed for at least some of the empty locations of the third array and a fourth array is generated. C1-parity symbols in each row are computed, generating a fifth array. A second modulation constraint is enforced on each C1-parity symbol in each row of the fifth array, generating a sixth array. The rows of the sixth array are assembled with header and sync fields for recording onto a recording media.
摘要翻译： 提供了一种系统来编码用于记录到介质上的数据，由此施加来自级联代码或产品代码的调制和线性约束。 生成第一组未编码的用户数据。 每行被调制编码以执行第一调制约束; 该阵列被变换成第二阵列，该第二阵列被转换成具有与调制数据交错的每列中的预定空位置的第三阵列。 对于第三阵列的至少一些空位置计算C2奇偶校验字节，并且生成第四阵列。 计算每行中的C1奇偶校验符号，生成第五个数组。 在第五阵列的每行中的每个C1奇偶校验符号上强制执行第二调制约束，产生第六阵列。 第六阵列的行与标题和同步字段组合，用于记录到记录介质上。
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公开(公告)号：US07877662B2
公开(公告)日：2011-01-25
申请号：US11690619
申请日：2007-03-23
IPC分类号： H03M13/00
CPC分类号： H03M13/15 , G11B20/1426 , H03M13/2707 , H03M13/2721 , H03M13/275 , H03M13/2792 , H03M13/2909 , H03M13/53
摘要： A system is provided to encode data for recording onto media whereby modulation and linear constraints from a concatenated code or product code are imposed. A first array of unencoded user data is generated. Each row is modulation encoded to enforce a first modulation constraint; the array is transformed into a second array which is transformed into a third array having predetermined empty locations in each column interleaved with the modulated data. A C2-parity byte is computed for at least some of the empty locations of the third array and a fourth array is generated. C1-parity symbols in each row are computed, generating a fifth array. A second modulation constraint is enforced on each C1-parity symbol in each row of the fifth array, generating a sixth array. The rows of the sixth array are assembled with header and sync fields for recording onto a recording media.
摘要翻译： 提供了一种系统来编码用于记录到介质上的数据，由此施加来自级联代码或产品代码的调制和线性约束。 生成第一组未编码的用户数据。 每行被调制编码以执行第一调制约束; 该阵列被变换成第二阵列，该第二阵列被转换成具有与调制数据交错的每列中的预定空位置的第三阵列。 对于第三阵列的至少一些空位置计算C2奇偶校验字节，并且生成第四阵列。 计算每行中的C1奇偶校验符号，生成第五个数组。 在第五阵列的每行中的每个C1奇偶校验符号上强制执行第二调制约束，产生第六阵列。 第六阵列的行与标题和同步字段组合，用于记录到记录介质上。
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公开(公告)号：US07873894B2
公开(公告)日：2011-01-18
申请号：US11690635
申请日：2007-03-23
IPC分类号： H03M13/00
CPC分类号： G11B20/1426 , G11B20/1833 , G11B2020/1446 , G11B2220/2516 , G11B2220/90
摘要： Method and computer program product are provided to encode data for recording onto media whereby modulation and linear constraints from a concatenated code or product code are imposed. A first array of unencoded user data is generated. Each row is modulation encoded to enforce a first modulation constraint; the array is transformed into a second array which is transformed into a third array having predetermined empty locations in each column interleaved with the modulated data. A C2-parity byte is computed for at least some of the empty locations of the third array and a fourth array is generated. C1-parity symbols in each row are computed, generating a fifth array. A second modulation constraint is enforced on each C1-parity symbol in each row of the fifth array, generating a sixth array. The rows of the sixth array are assembled with header and sync fields for recording onto a recording media.
摘要翻译： 提供方法和计算机程序产品以对用于记录到介质上的数据进行编码，从而施加来自级联代码或产品代码的调制和线性约束。 生成第一组未编码的用户数据。 每行被调制编码以执行第一调制约束; 该阵列被变换成第二阵列，该第二阵列被转换成具有与调制数据交错的每列中的预定空位置的第三阵列。 对于第三阵列的至少一些空位置计算C2奇偶校验字节，并且生成第四阵列。 计算每行中的C1奇偶校验符号，生成第五个数组。 在第五阵列的每行中的每个C1奇偶校验符号上强制执行第二调制约束，产生第六阵列。 第六阵列的行与标题和同步字段组合，用于记录到记录介质上。
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公开(公告)号：US20090027242A1
公开(公告)日：2009-01-29
申请号：US12185095
申请日：2008-08-03
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) precoding. 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子块中的至少一个在1 /（1 + D2）预编码之后产生至少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。
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公开(公告)号：US08276045B2
公开(公告)日：2012-09-25
申请号：US12351738
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： G11C29/00
CPC分类号： H03M13/2909 , G11B20/1202 , G11B20/1833 , G11B20/1866 , G11B2020/1836 , G11B2020/1853 , G11B2220/93 , H03M13/15 , H03M13/1515
摘要： Conventional C2 coding and interleaving for multi-track data tape in LTO-3/4 do not support recording data onto a number of concurrent tracks which is not a power of two. Higher-rate longer C2 codes, which do not degrade error rate performance, are provided. An adjustable format and interleaving scheme accommodates future tape drives in which the number of concurrent tracks is not necessarily a power of two. A data set is segmented into a plurality of unencoded subdata sets and parity bytes are generated for each row and column. The parameters of the C2 code include N2 as the least common multiple of the number of possible tracks to which codeword objects are to be written. COs are formed from N2 C1 codewords, mapped onto a logical data track according to information within headers of the CO and modulation encoded into synchronized COs which are written to the tape.
摘要翻译： LTO-3/4中的多轨数据磁带的常规C2编码和交织不支持将数据记录到不是2的幂的多个并发磁道上。 提供了更高速率的更长的C2代码，这不会降低错误率性能。 可调格式和交错方案适应将来的磁带驱动器，其中并发轨道的数量不一定是二的幂。 将数据集分割为多个未编码的子数据集，并为每行和列生成奇偶校验字节。 C2码的参数包括N2作为要写入码字对象的可能轨道数的最小公倍数。 CO由N 2 C1码字形成，根据被写入到磁带的编码到同步的CO中的CO和报头中的信息映射到逻辑数据轨道。
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7.发明授权Rewrite-efficient ECC/interleaving for multi-track recording on magnetic tape 有权在磁带上进行多轨录音的高效ECC /交错公开(公告)号：US07876516B2
公开(公告)日：2011-01-25
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
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。
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公开(公告)号：US07679535B2
公开(公告)日：2010-03-16
申请号：US12185095
申请日：2008-08-03
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： H03M5/00
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) precoding. 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子块中的至少一个在1 /（1 + D2）预编码之后产生至少Q1个转换。 将第n + 1编码比特的第二组划分为P3编码子块，并且在（m-n）/ s个未编码符号之间交织P3编码子块，以形成第（m + 1）比特的输出序列码字 存储在数据存储介质上。
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公开(公告)号：US07486208B2
公开(公告)日：2009-02-03
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： H03M5/00
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) precoding. 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子块中的至少一个在1 /（1 + D2）预编码之后产生至少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。
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公开(公告)号：US20100180180A1
公开(公告)日：2010-07-15
申请号：US12351738
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
CPC分类号： H03M13/2909 , G11B20/1202 , G11B20/1833 , G11B20/1866 , G11B2020/1836 , G11B2020/1853 , G11B2220/93 , H03M13/15 , H03M13/1515
摘要： Conventional C2 coding and interleaving for multi-track data tape in LTO-¾ do not support recording data onto a number of concurrent tracks which is not a power of two. Higher-rate longer C2 codes, which do not degrade error rate performance, are provided. An adjustable format and interleaving scheme accommodates future tape drives in which the number of concurrent tracks is not necessarily a power of two. A data set is segmented into a plurality of unencoded subdata sets and parity bytes are generated for each row and column. The parameters of the C2 code include N2 as the least common multiple of the number of possible tracks to which codeword objects are to be written. COs are formed from N2 C1 codewords, mapped onto a logical data track according to information within headers of the CO and modulation encoded into synchronized COs which are written to the tape.
摘要翻译： LTO-¾中的多轨数据磁带的常规C2编码和交织不支持将数据记录到不是2的幂的多个并发轨道上。 提供了更高速率的更长的C2代码，这不会降低错误率性能。 可调格式和交错方案适应将来的磁带驱动器，其中并发轨道的数量不一定是二的幂。 将数据集分割为多个未编码的子数据集，并为每行和列生成奇偶校验字节。 C2码的参数包括N2作为要写入码字对象的可能轨道数的最小公倍数。 CO由N2 C1码字形成，根据CO的头部内的信息和被编码成被写入到磁带的同步的CO的调制信号映射到逻辑数据轨道上。
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