公开(公告)号：US20040164884A1

公开(公告)日：2004-08-26

申请号：US10787141

申请日：2004-02-27

申请人： Samsung Electronics Co., Ltd.

发明人： Jae-seong Shim ,  Ki-hyun Kim ,  Hyun-soo Park ,  Kiu-hae Jung ,  Iqbal Mahboob

IPC分类号： H03M005/00

CPC分类号： G11B20/1426 ,  G11B2020/1457 ,  H03M5/145 ,  H03M7/46

摘要： A method of generating and allocating codewords includes allocating one of two selectable codewords b1 and b2 as codeword nullbnull when a preceding codeword nullanull and a following codeword nullbnull form a code stream X, in which the codewords b1 and b2 have opposite INV values which are parameters indicating whether the number of null1snull contained in a codeword is an odd number or an even number. When the code stream of the preceding codeword nullanull and the following codeword b1 is X1, and when the code stream of the preceding codeword nullanull and the following codeword b2 is X2, the codewords are allocated such that the INV values of X1 and X2 are maintained to be opposite when the preceding codeword nullanull or the following codeword b1(b2) (b1 or b2) should be replaced by another codeword in compliance with a predetermined boundary condition given between codewords. The codewords are allocated so that a DC suppression capability of the code stream can be maintained.

摘要翻译： 一种产生和分配码字的方法包括：当前一个码字“a”和随后的码字“b”形成码流X时，将两个可选码字b1和b2之一分配为码字“b”，其中码字b1和b2具有 相反的INV值，其是指示码字中包含的“1”的数目是奇数还是偶数的参数。 当前一个码字“a”的码流和随后的码字b1为X1时，当前一个码字“a”和随后的码字b2的码流为X2时，分配码字，使得X1的INV值 并且当前面的码字“a”或者随后的码字b1（b2）（b1或b2）应该被替换为符合在码字之间给定的预定边界条件的另一码字时，X2被维持为相反。 分配码字使得能够维持码流的DC抑制能力。

公开(公告)号：US20040255222A1

公开(公告)日：2004-12-16

申请号：US10765278

申请日：2004-01-28

申请人： SAMSUNG ELECTRONICS CO., LTD.

发明人： Ki-hyun Kim ,  Sung-hyu Han ,  In-sik Park ,  Yoon-woo Lee

IPC分类号： H03M013/00

CPC分类号： H03M13/1182

摘要： A method of generating parity data based on a low-density parity check matrix and an apparatus therefore. The method of generating parity data is based on a parity check matrix H having p codewords of length c, each codeword being divided in a message word of length m and parity data of length p, includes reordering columns of the parity check matrix H based on elements in each column having values of one to generate a reordered parity check matrix Hnull determining a cross-point I between a diagonal line L2 of a parity matrix part Mp in the parity check matrix Hnull and a reordered diagonal line L1 defined by a first entry of an element having a value of one in each column of the reordered parity check matrix Hnull, and, on the basis of positions of elements having a value of one in rows above a horizontal line L3 that passes through the cross-point I to perform column permutations on the reordered parity check matrix Hnull, to generate a triangular matrix T The method further includes using triangular matrix T and the message words to obtain a first part of the parity data, and using the equation Hxnull0, where x is a codeword matrix, to obtain the remaining second part of parity data.

摘要翻译： 因此，基于低密度奇偶校验矩阵产生奇偶校验数据的方法和装置。 产生奇偶校验数据的方法基于具有长度为c的p个码字的奇偶校验矩阵H，每个码字被划分成长度为m的消息字和长度为p的奇偶校验数据，包括基于奇偶校验矩阵H的重排序列 每个列中的元素具有一个值，用于生成确定奇偶校验矩阵H'中的奇偶校验矩阵部分Mp的对角线L2和由奇偶校验矩阵H'定义的重排序的对角线L1之间的交叉点I的重排序奇偶校验矩阵H' 在重新排序的奇偶校验矩阵H'的每列中具有值为1的元素的第一次入口，并且基于通过交叉点的水平线L3上方的具有一行的元素的位置 我对重排序的奇偶校验矩阵H'执行列排列，以产生三角矩阵T.该方法还包括使用三角矩阵T和消息字来获得奇偶校验数据的第一部分，并且使用等式Hx = 0，其中x是码字矩阵，以获得奇偶校验数据的剩余第二部分。

公开(公告)号：US20040199860A1

公开(公告)日：2004-10-07

申请号：US10738203

申请日：2003-12-18

申请人： Samsung Electronics Co., Ltd

发明人： Ki-hyun Kim ,  Sung-hyu Han ,  In-sik Park ,  Jae-seong Shim ,  Yoon-woo Lee

IPC分类号： G06F011/00 ,  H03M013/00

CPC分类号： H03M13/1182

摘要： A method and apparatus for generating parity information for error correction using a parity check matrix, rows of which correspond to a message word length m, columns of which correspond to a codeword length n, the number of nullonesnull included in the rows and columns is fixed, and remaining elements are all nullzerosnull, the error correction method includes obtaining a p number of parity information using the parity check matrix and predetermined message data S, wherein a matrix including a k number of columns from a (n-mnull1)-th element of the parity check matrix is created with a lower triangular matrix form, all elements within the upper triangular portion of the lower triangular form are nullzerosnull, using a column and row permutation method.

摘要翻译： 一种用于使用奇偶校验矩阵来生成用于纠错的奇偶校验信息的方法和装置，其行与字符长度m相对应的消息字长度m相应于行字列中包括的“1”的数目 并且剩余的元素全部为“0”，纠错方法包括使用奇偶校验矩阵和预定消息数据S来获得奇偶校验信息的数量，其中包括从（n-m + 1） 奇偶校验矩阵的第一个元素用下三角矩阵形式创建，使用列和行置换方法，下三角形形式的上三角形部分内的所有元素都为“零”。

公开(公告)号：US20020105884A1

公开(公告)日：2002-08-08

申请号：US09985162

申请日：2001-11-01

申请人： Samsung Electronics Co., Ltd.

发明人： Jae-Seong Shim ,  Jung-wan KO ,  Ki-hyun Kim ,  Hyun-soo Park ,  Kyung-geun Lee

IPC分类号： G11B007/0045

CPC分类号： G11B20/1426 ,  G11B7/00745 ,  G11B20/1217 ,  G11B20/18 ,  G11B27/3027 ,  G11B2020/1434 ,  G11B2220/216 ,  G11B2220/218 ,  G11B2220/2562 ,  G11B2220/2575

摘要： A method of and an apparatus for modulating data to be resistant to channel distortion. A space extending encoder performs a first code transformation to extend a run length of digitized data to a predetermined length and outputs the space-extended data. A multiplexer multiplexes the space-extended data and data transformed by a predetermined second code transformation. A format converter converts the multiplexed data into a predetermined format which is suitable for writing to a recording medium. The apparatus and method enable recorded data to be resistant to channel distortion, enable the data to be recorded with increased recording density, and enable the data written to the recording medium to be reproduced with improved reliability.

摘要翻译： 一种用于调制数据以抵抗信道失真的方法和装置。 空间扩展编码器执行第一代码变换以将数字化数据的游程长度扩展到预定长度，并输出空间扩展数据。 复用器多路复用空间扩展数据和通过预定的第二代码变换变换的数据。 格式转换器将多路复用数据转换成适合于向记录介质写入的预定格式。 该装置和方法使得记录数据能够抵抗信道失真，从而能够以增加的记录密度来记录数据，并且能够以提高的可靠性使得写入记录介质的数据被再现。

公开(公告)号：US20040028150A1

公开(公告)日：2004-02-12

申请号：US10446641

申请日：2003-05-28

申请人： Samsung Electronics Co., Ltd.

发明人： Ki-hyun Kim ,  Sung-hyu Han ,  In-sik Park ,  Jae-seong Shim

IPC分类号： H03K009/00 ,  H04L027/06

CPC分类号： H03M5/145 ,  G11B20/1488

摘要： An apparatus for and a method of signal demodulation which reduces a number of calculations required for demodulating an M-bit codeword which has been modulated from an N-bit codeword. Probability data for each bit of the M-bit codeword is tested to determine if the probability data indicates a high reliability of being either a one or a zero. Bits having the high reliability are compared with corresponding bits in each of a plurality of reference codewords and the codewords having bits which match the corresponding bits having the high reliability are used along with the probability data to calculate a probability of each bit of the N-bit codeword. As a number of bits having the high reliability increases, a number of calculations required to calculate the probability of each bit of the N-bit codeword decreases.

摘要翻译： 一种用于信号解调的装置和方法，其减少了从N比特码字调制的M位码字的解调所需的计算数量。 测试M比特码字的每个比特的概率数据，以确定概率数据是否表示是一个或一个零的高可靠性。 将具有高可靠性的比特与多个参考码字中的每一个中的相应比特进行比较，并且与概率数据一起使用具有与具有高可靠性的相应比特匹配的比特的码字，以计算N比特的每个比特的概率， 位码字。 随着具有高可靠性的多个比特数增加，计算N比特码字的每个比特的概率所需的计算量减少。

公开(公告)号：US20040201503A1

公开(公告)日：2004-10-14

申请号：US10763381

申请日：2004-01-26

申请人： Samsung Electronics Co., Ltd.

发明人： Sung-hyu Han ,  Ki-hyun Kim ,  In-sik Park ,  Yoon-woo Lee

IPC分类号： H03M001/12 ,  H03M007/00

CPC分类号： H04L1/0052 ,  G11B20/10009 ,  H04L1/0057 ,  H04L25/067

摘要： A soft demodulation method and apparatus including calculating partial sums for a unit of each predetermined number of bits of a codeword received from a channel; calculating a value of each entry of the decoding table by referring to the partial sums; and detecting a maximum among values of all entries of the decoding table and calculating a log-likelihood ratio (LLR) using the detected maximum. Accordingly, it is possible to reduce the amount of computation required to perform a soft demodulation process using run-length limited (RLL) codes and to simplify the soft demodulation process.

摘要翻译： 一种软解调方法和装置，包括对从信道接收的码字的每个预定位数的单位计算部分和; 通过参考部分和来计算解码表的每个条目的值; 并且检测解码表的所有条目的值中的最大值，并使用检测到的最大值来计算对数似然比（LLR）。 因此，可以减少使用游程长度限制（RLL）码进行软解调处理所需的计算量并简化软解调处理。

公开(公告)号：US20030025545A1

公开(公告)日：2003-02-06

申请号：US10176975

申请日：2002-06-24

申请人： Samsung Electronics Co., Ltd.

发明人： Hyun-soo Park ,  Jae-seong Shim ,  Kiu-hae Jung ,  Ki-hyun Kim

IPC分类号： G06F001/04

CPC分类号： G11B27/24 ,  G11B20/10009 ,  G11B20/10222 ,  G11B27/3027 ,  G11B2220/216 ,  G11B2220/218 ,  G11B2220/2562 ,  G11B2220/2575

摘要： A clock signal generating system using a wobble signal and a data reproducing apparatus, has a first block to detect a frequency error signal or a phase error signal from the RF signals on the recording medium and to output the detected frequency error signal or the detected phase error signal. A second block detects a wobble error signal from the wobble signals on the recording medium and outputs the detected wobble error signal. A clock generating unit generates a clock signal using the detected frequency error signal or the detected phase error signal of the second block when the RF signals have an error, and using the detected wobble error signal of the first block when the wobble signals have an error.

摘要翻译： 使用摆动信号和数据再现装置的时钟信号发生系统具有从记录介质上的RF信号检测频率误差信号或相位误差信号的第一块，并输出检测到的频率误差信号或检测相位 误差信号。 第二块检测来自记录介质上的摆动信号的摆动误差信号，并输出检测到的摆动误差信号。 当RF信号有误差时，时钟产生单元使用检测到的频率误差信号或检测到的相位误差信号产生时钟信号，并且当摆动信号具有错误时使用检测到的摆动误差信号 。

公开(公告)号：US20020060596A1

公开(公告)日：2002-05-23

申请号：US09961331

申请日：2001-09-25

申请人： Samsung Electronics Co., Ltd.

发明人： Jae-seong Shim ,  Ki-hyun Kim ,  Hyun-soo Park

IPC分类号： H03L005/00

CPC分类号： G11B20/10009

摘要： A selective disturbance compensating apparatus for use in reproduction from an optical recording medium, and a 3T-correcting method. A DC offset canceller extracts a DC offset from a reproduction signal to cancel the DC offset. An equalizer equalizes the offset-cancelled signal. A switching unit selects between the offset-canceled signal and the equalized signal according to whether distortion caused by asymmetry of the signal is above or below a predetermined reference level. A 3-T correcting unit corrects asymmetry of the selected signal. In another embodiment, a second switching unit selects between the 3-T corrected signal and a Viterbi corrected signal.

摘要翻译： 一种用于从光记录介质再现的选择性干扰补偿装置和3T校正方法。 DC偏移消除器从再现信号中提取DC偏移以抵消DC偏移。 均衡器平衡偏移消除信号。 根据由信号的不对称引起的失真是否高于或低于预定参考电平，开关单元在偏移消除信号和均衡信号之间进行选择。 3-T校正单元校正所选信号的不对称性。 在另一个实施例中，第二切换单元在3-T校正信号和维特比校正信号之间进行选择。

公开(公告)号：US20040168112A1

公开(公告)日：2004-08-26

申请号：US10680419

申请日：2003-10-08

申请人： SAMSUNG Electronics Co., Ltd.

发明人： Ki-hyun Kim ,  In-sik Park ,  Jae-seong Shim ,  Sung-hyu Han

IPC分类号： H03M013/00

CPC分类号： H03M13/11

摘要： An error correction coding apparatus includes a parity check matrix generation unit which generates a parity check matrix having a number of elements having a value of 1 in each row thereof, having a predetermined number of elements having a value of 1 in each column thereof, and having the other elements having a value of 0; a parity check matrix adjustment unit which receives the parity check matrix from the parity check matrix generation unit, searches the parity check matrix for a cycle forming group of four elements positioned at respective vertexes of a rectangle and having a value of 1, and when there is at least one cycle forming group, replaces the value of 1 of at least one element of the cycle forming group with the value 0 of another element, to output a adjusted parity check matrix without a cycle forming group therein; and an LDPC coding unit which receives the adjusted parity check matrix from the parity check matrix adjustment unit and receives an m-bit message word to perform LDPC coding.

摘要翻译： 纠错编码装置包括奇偶校验矩阵生成单元，其生成具有每行的具有值1的元素数目的数量的奇数校验矩阵，具有每列中具有值1的预定数量的元素，以及 具有值为0的其他元素; 奇偶校验矩阵调整单元，其从奇偶校验矩阵生成单元接收奇偶校验矩阵，在奇偶校验矩阵中搜索位于矩形的各个顶点的值为1的四个元素的周期形成组，并且当存在 是至少一个循环形成组，将循环形成组的至少一个元素的值1替换为另一元素的值0，以输出其中没有循环形成组的调整奇偶校验矩阵; 以及LDPC编码单元，其从奇偶校验矩阵调整单元接收经调整的奇偶校验矩阵，并接收m位消息字以执行LDPC编码。

公开(公告)号：US20040164885A1

公开(公告)日：2004-08-26

申请号：US10787156

申请日：2004-02-27

申请人： Samsung Electronics Co., Ltd.

发明人： Jae-seong Shim ,  Ki-hyun Kim ,  Hyun-soo Park ,  Kiu-hae Jung ,  Igbal Mahboob

IPC分类号： H03M007/00

CPC分类号： G11B20/1426 ,  G11B2020/1457 ,  H03M5/145 ,  H03M7/46

摘要： A method of generating and allocating codewords includes allocating one of two selectable codewords b1 and b2 as codeword nullbnull when a preceding codeword nullanull and a following codeword nullbnull form a code stream X, in which the codewords b1 and b2 have opposite INV values which are parameters indicating whether the number of null1snull contained in a codeword is an odd number or an even number. When the code stream of the preceding codeword nullanull and the following codeword b1 is X1, and when the code stream of the preceding codeword nullanull and the following codeword b2 is X2, the codewords are allocated such that the INV values of X1 and X2 are maintained to be opposite when the preceding codeword nullanull or the following codeword b1 (b2) (b1 or b2) should be replaced by another codeword in compliance with a predetermined boundary condition given between codewords. The codewords are allocated so that a DC suppression capability of the code stream can be maintained.

摘要翻译： 一种产生和分配码字的方法包括：当前一个码字“a”和随后的码字“b”形成码流X时，将两个可选码字b1和b2之一分配为码字“b”，其中码字b1和b2具有 相反的INV值，其是指示码字中包含的“1”的数目是奇数还是偶数的参数。 当前一个码字“a”的码流和随后的码字b1为X1时，当前一个码字“a”和随后的码字b2的码流为X2时，分配码字，使得X1的INV值 并且当前面的码字“a”或者随后的码字b1（b2）（b1或b2）应该被替换为符合在码字之间给定的预定边界条件的另一码字时，X2被维持为相反。 分配码字使得能够维持码流的DC抑制能力。