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1. 发明申请

WO2008138707A1 RLL ENCODING 审中-公开
标题翻译： RLL编码
公开(公告)号：WO2008138707A1
公开(公告)日：2008-11-20
申请号：PCT/EP2008/054827
申请日：2008-04-21
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION , IBM UNITED KINGDOM LIMITED , CIDECIYAN, Roy, Daron , ELEFTHERIOU, Evangelos , MITTELHOLZER, Thomas , SEGER, Paul , TANAKA, Keisuke
发明人： CIDECIYAN, Roy, Daron , ELEFTHERIOU, Evangelos , MITTELHOLZER, Thomas , SEGER, Paul , TANAKA, Keisuke
IPC分类号： H03M5/14 , G11B20/14
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 P 1subblocks 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 P 2 subblocks of the second set gives rise to at least Q 1 transitions after 1/(1+ D 2 ) precoding. A second set of n +1 encoded bits is divided into P 3 encoded subblocks and the P 3 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位的块被分成第一组n + 1个编码比特，其中第一组的P1块中的至少一个满足G，M和I约束。第一组n + 1编码比特被映射到第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 + D）之后产生至少Q1个转换

2. 发明申请

WO1998006181A1 SYSTEM FOR IMPLEMENTING RUN LENGTH LIMITED CODES 审中-公开
标题翻译：执行运行长度有限编码的系统
公开(公告)号：WO1998006181A1
公开(公告)日：1998-02-12
申请号：PCT/US1997013650
申请日：1997-08-05
申请人： SEAGATE TECHNOLOGY, INC.
发明人： SEAGATE TECHNOLOGY, INC. , TSANG, Kinhing, Paul
IPC分类号： H03M07/46
CPC分类号： G11B20/1426 , G06T9/005 , G11B2020/1446 , H03M5/145
摘要： An apparatus encodes data blocks into code blocks, each code block containing more symbols than its respective data block. The apparatus includes a data block latch (30) for receiving individual data blocks and for dividing each data block into two sub-blocks. An encoder (32) receives one of the data sub-blocks and encodes the first data sub-block as a code sub-block. An interleaver (34, 36), coupled to the encoder (32) and the data block latch (30), combines the code sub-block with the second data sub-block to produce a code block, such that when the code blocks are concatenated with each other to produce a string of code symbols no more than five consecutive occurrences of a particular code symbol are present in the string of code symbols.
摘要翻译：一种装置将数据块编码为码块，每个码块包含比其相应数据块更多的码元。该装置包括用于接收各个数据块并用于将每个数据块划分成两个子块的数据块锁存器（30）。编码器（32）接收数据子块中的一个，并将第一数据子块编码为码子块。耦合到编码器（32）和数据块锁存器（30）的交织器（34,36）将代码子块与第二数据子块组合以产生代码块，使得当代码块为相互串联以产生一串代码符号，在代码符号串中不存在不超过五个特定代码符号的连续出现次数。

3. 发明申请

WO2003056557A2 METHOD, SYSTEM, AND PROGRAM FOR SYNCHRONIZATION AND RESYNCHRONIZATION OF A DATA STREAM 审中-公开
标题翻译：方法，系统和程序，用于数据流的同步和重新生成
公开(公告)号：WO2003056557A2
公开(公告)日：2003-07-10
申请号：PCT/EP2002/014563
申请日：2002-12-19
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION , IBM DEUTSCHLAND GMBH
发明人： BLAUM, Mario , JAQUETTE, Glen, Alan , MARCUS, Brian, Harry , MELAS, Constantin, Michael
IPC分类号： G11B20/00
CPC分类号： G11B20/1426 , G11B27/3027 , G11B2020/1446
摘要： Provided is a method, system, and program for providing synchronization in a binary data stream. A binary data stream is received. A synchronization mark having at least one isolated peak is generated into at least one point in the data stream. An encoded data stream is formed by concatenating the synchronization mark with the received binary data. During decoding, the synchronization mark is detected based on error propagation occurring adjacent to the at least one isolated peak of the synchronization mark.
摘要翻译：提供了一种用于在二进制数据流中提供同步的方法，系统和程序。接收二进制数据流。具有至少一个孤立峰值的同步标记被生成到数据流中的至少一个点。编码数据流是通过将同步标记与接收的二进制数据相连而形成的。在解码期间，基于与同步标记的至少一个孤立峰相邻出现的误差传播来检测同步标记。

4. 发明申请

WO1998029872A1 A RATE 24/25 MODULATION CODE FOR PRML RECORDING CHANNELS 审中-公开
标题翻译：用于PRML记录通道的速率24/25调制码
公开(公告)号：WO1998029872A1
公开(公告)日：1998-07-09
申请号：PCT/US1997024004
申请日：1997-12-31
申请人： QUANTUM CORPORATION
发明人： QUANTUM CORPORATION , FISHER, Kevin, D. , FITZPATRICK, James
IPC分类号： G11B20/14
CPC分类号： H03M5/145 , G11B20/1426 , G11B2020/1434 , G11B2020/1446 , G11B2020/1449
摘要： Rate 24/25 modulation encoding methods and apparatus improve efficiency in a PRML magnetic recording channel. The rate 24/25 code word uses rate 8/9 RLL endocing of one byte of user data, combined with interleaved unencoded bytes to achieve improved code rates with reasonable global run length constraint. Use of the rate 8/9 RLL (0,3) subcode results in a rate 24/25 RLL (0,11) code, while a rate 8/9 (0,6/5) subcode results in a rate 24/25 RLL (0,14/13) code.
摘要翻译：速率24/25调制编码方法和设备提高了PRML磁记录通道的效率。速率24/25码字使用一个字节的用户数据的速率8/9 RLL内联，并结合交织的未编码字节，以合理的全局运行长度约束来实现改进的码率。速率8/9 RLL（0,3）子码的使用导致速率为24/25 RLL（0,11）码，而速率为8/9（0,6 / 5）的子码导致速率为24/25 RLL（0,14 / 13）代码。

5. 发明申请

WO9917456A9 METHOD AND APPARATUS FOR ENCODING A BINARY SIGNAL 审中-公开
标题翻译：用于编码二进制信号的方法和设备
公开(公告)号：WO9917456A9
公开(公告)日：1999-06-17
申请号：PCT/US9820360
申请日：1998-09-28
申请人： DATAPATH SYSTEMS INC , SHIH MING SHIH , THAPAR HEMANT
发明人： SHIH-MING SHIH , THAPAR HEMANT
IPC分类号： G06F11/10 , G11B20/10 , G11B20/14 , G11B20/18 , H03M5/14 , H03M13/31 , H03M13/41 , H03M13/12
CPC分类号： G11B20/1426 , G11B20/10009 , G11B2020/1434 , G11B2020/1446 , H03M5/145 , H03M13/31
摘要： A system and method for avoiding catastophic error sequences in a media code sequence of symbols for data storage on a storage medium according to EPRML. The system and method include modulation encoding user data which is to be stored on the storage medium using a modulation encoder (602). The modulation encoder (602) outputs a channel code modulation output symbol sequence. The modulation code is defined according to a modulation criteria wherein the set of all possible modulation output symbol sequences is constrained in a manner which excludes certain excluded modulation output symbol sequences. A precoder (604) precodes the channel code modulation output symbol sequence to a precoding transfer function. The precoding transfer function transforms the channel code modulation output symbol sequence into a media code sequence of symboles and the precoding transfer function is defined so that when modulation encoding is performed according to the modulation criteria, the media code sequence of symbols is constrained to exclude EPRML catastrophic error sequeces of greater than a determined length.
摘要翻译：一种用于根据EPRML避免用于存储介质上的数据存储的符号的媒体码序列中的突变错误序列的系统和方法。该系统和方法包括使用调制编码器对要存储在存储介质上的用户数据进行调制编码（602）。调制编码器（602）输出信道码调制输出码元序列。根据调制准则来定义调制码，其中所有可能的调制输出码元序列的集合以排除某些排除的调制输出码元序列的方式被约束。预编码器（604）将信道编码调制输出符号序列预编码为预编码传递函数。预编码传递函数将信道码调制输出码元序列变换为码元的媒体码序列，并且定义预编码传递函数，使得当根据调制准则执行调制编码时，码元的媒体码序列被约束以排除EPRML 大于确定长度的灾难性错误后果。

6. 发明申请

WO99008264A1 DATA STORAGE SYSTEM HAVING EFFICIENT BLOCK CODE IMPLEMENTATION 审中-公开
标题翻译：具有有效的块代码实现的数据存储系统
公开(公告)号：WO99008264A1
公开(公告)日：1999-02-18
申请号：PCT/US1998/009814
申请日：1998-05-14
IPC分类号： G11B5/012 , G11B5/09 , G11B20/14 , H03M7/14 , H04L25/49 , G06F13/32 , G11B5/02 , H03M7/06
CPC分类号： G11B5/012 , G11B5/09 , G11B20/1426 , G11B2020/1446
摘要： A storage device (100) includes a storage medium (102), write element (108) and a data input (112). A first encoder (152) provides an encoded data output as a function of a first portion of the data input (112). The first encoder (152) also provides a state output (156). A second encoder (154) provides a second encoded data output as a function of a portion of data input (112) and as a function of the state output (156). The first and second data outputs are coupled to the write element (108) for writing information onto the storage medium (102). In addition, a similar technique is used for a block decoder (134).
摘要翻译：存储设备（100）包括存储介质（102），写入元件（108）和数据输入（112）。第一编码器（152）提供作为数据输入（112）的第一部分的函数的编码数据输出。第一编码器（152）还提供状态输出（156）。第二编码器（154）提供作为数据输入（112）的一部分并且作为状态输出（156）的函数的函数的第二编码数据输出。第一和第二数据输出耦合到写元件（108），用于将信息写入存储介质（102）。此外，类似的技术用于块解码器（134）。

7. 发明申请

WO2010088977A1 REWRITE-EFFICIENT ECC/INTERLEAVING FOR MULTI-TRACK RECORDING ON MAGNETIC TAPE 审中-公开
标题翻译：有效的ECC /用于磁带上的多轨跟踪记录
公开(公告)号：WO2010088977A1
公开(公告)日：2010-08-12
申请号：PCT/EP2009/065849
申请日：2009-11-25
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION , MITTELHOLZER, Thomas , CIDECIYAN, Roy, Daron , ELEFTHERIOU, Evangelos , TANAKA, Keisuke , MATSUO, Hisato , SEGER, Paul
发明人： MITTELHOLZER, Thomas , CIDECIYAN, Roy, Daron , ELEFTHERIOU, Evangelos , TANAKA, Keisuke , MATSUO, Hisato , SEGER, Paul
IPC分类号： G11B20/12 , G11B20/18 , H03M13/27
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 K 2 rows and K 1 columns. For each unencoded subdata set, N 1 -K 1 C1-parity bytes are generated for each row and N 2 -K 2 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 arc 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。

8. 发明申请

WO2008116725A1 REVERSE CONCATENATION FOR PRODUCT CODES 审中-公开
标题翻译：产品代码的反向限定
公开(公告)号：WO2008116725A1
公开(公告)日：2008-10-02
申请号：PCT/EP2008/052510
申请日：2008-02-29
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION , IBM UNITED KINGDOM LIMITED , ELEFTHERIOU, Evangelos , HUTCHINS, Robert , MITTELHOLZER, Thomas , SEGER, Paul
发明人： ELEFTHERIOU, Evangelos , HUTCHINS, Robert , MITTELHOLZER, Thomas , SEGER, Paul
IPC分类号： G11B20/18
CPC分类号： G11B20/1866 , G11B20/1426 , G11B20/1803 , G11B2020/1287 , G11B2020/1446 , G11B2020/1836 , G11B2220/2516 , G11B2220/2537 , G11B2220/90 , H03M5/145 , H03M13/1515 , H03M13/2707 , H03M13/2721 , H03M13/275 , H03M13/2792 , H03M13/2909 , H03M13/53 , H03M13/6343
摘要： A system, 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：提供了一种系统，方法和计算机程序产品，用于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。

9. 发明申请

WO2004029955A1 HIGH RATE CODING FOR MEDIA NOISE 审中-公开
标题翻译：媒体噪声的高速编码
公开(公告)号：WO2004029955A1
公开(公告)日：2004-04-08
申请号：PCT/EP2003/010635
申请日：2003-09-24
申请人： INFINEON TECHNOLOGIES AG
发明人： BLISS, William, G. , KARABED, Razmik , VITYAEV, Andrei
IPC分类号： G11B20/10
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, b3 . . . 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b1，b2，b3。。。 bk到编码序列c0，c1，c2。。。 CQ。选择电路以编码序列c0，c1，c2选择c0。。。 cq，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b1，b2，b3的编码器电路。。。 bk到序列c1，c2。。。 cq，以及将c0加到序列c1，c2的转移最小化电路。。。 CQ。该装置可以具有向编码序列c0，c1，c2添加至少一个附加位（可以是奇偶校验位）的电路。。。 CQ。

10. 发明申请

WO01003304A1 PARTIAL RESPONSE CHANNEL HAVING COMBINED MTR AND PARITY CONSTRAINTS 审中-公开
标题翻译：具有组合地铁和部分限制的部分响应通道
公开(公告)号：WO01003304A1
公开(公告)日：2001-01-11
申请号：PCT/US1999/031199
申请日：1999-12-31
IPC分类号： G11B20/10 , G11B20/14 , H03M5/14 , H03M7/14 , H03M13/09 , H03M13/31 , H03M13/41
CPC分类号： G11B20/10055 , G11B20/10009 , G11B20/1426 , G11B2020/1446 , H03M5/145 , H03M13/31 , H03M13/41 , H03M13/4107 , H03M13/6331 , H03M13/6343
摘要： A data storage channel encoder (150) includes a data word input (152), a code word output (153) and an encoder. The encoder (150) is coupled between the data word input (152) and the code word output (153) and is adapted to encode successive data words (Xm) received on the data word input (152) into sucessive code words (Yn) on the code word output (153) according to a selected code having combined maximum transition run and parity constraints. The maximum transition run constraint constrains the successive code words (Yn) such that, when the successive code words (Yn) are concatenated to form an encoded bit stream (260), the encoded bit stream (260) has a maximum of one consecutive transition beginning at either odd or even indexed bit positions (268) in the encoded bit stream (260) and a maximum of two consecutive transitions beginning at the other of the odd or even indexed bit positions (268).
摘要翻译：数据存储通道编码器（150）包括数据字输入（152），代码字输出（153）和编码器。编码器（150）耦合在数据字输入（152）和代码字输出（153）之间，并且适于将在数据字输入（152）上接收的连续数据字（Xm）编码为成功的代码字（Yn）根据具有组合的最大转换运行和奇偶校验约束的所选代码，在码字输出（153）上。最大过渡运行约束约束连续码字（Yn），使得当连续码字（Yn）被级联以形成编码比特流（260）时，编码比特流（260）具有最大一个连续转换在编码比特流（260）中的奇数或偶数索引比特位置（268）开始，并且从奇数或偶数索引比特位置（268）中的另一个开始的最大两个连续转换开始。

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