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    Apparatus and method for generating soft output of signal passing through channel
    11.
    发明公开
    Apparatus and method for generating soft output of signal passing through channel 审中-公开
    Apparat und Verfahren zur Erzeugung des“Soft-Outputs”eines den KanaldurchströmendenSignales

    公开(公告)号：EP1361662A1

    公开(公告)日：2003-11-12

    申请号：EP02258582.2

    申请日：2002-12-12

    申请人： SAMSUNG ELECTRONICS CO., LTD.

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

    IPC分类号： H03M13/45 ,  G11B20/18 ,  G11B20/10 ,  H03M13/37

    CPC分类号： G11B20/18 ,  G11B20/10

    摘要： Provided are an apparatus and method for generating a soft output of a signal. The method including inputting an input signal that is a discrete signal converted from an analog signal passing through a channel having predetermined characteristics such as a recording medium; setting a point in time, as a first reference point, at which a code of a value of the input signal is inverted, and detecting a predetermined number of inversion sections at the first reference point; setting points in time, as second reference points, when the input signal has a discrete value within the inversion section, and calculating all of error paths of target values at the each time, the target values including the values of the input signal at the second reference points and the values of signals at each time, and the error paths being a set of the target values; calculating accumulated errors for the error paths with the values of input signal within the inversion section and the values of the error paths, and calculating maximum values of the accumulated errors for the error paths at the second reference points; calculating a log likelihood relation (LLR) value using the maximum values at the second reference points; and replacing the values of the input signal within the inversion section of a predetermined range with the LLR values and outputting the LLR values. Accordingly, soft outputs of signals, which pass through a channel having predetermined characteristics, are generated for error paths of only the signals that intersect at a zero point, thereby remarkably reducing calculation time.

    摘要翻译： 提供了一种用于产生信号的软输出的装置和方法。 该方法包括输入作为从通过具有预定特征的通道的模拟信号（例如记录介质）转换的离散信号的输入信号; 将作为第一参考点的时间点设置为输入信号的值的代码反转，并且检测在第一参考点处的预定数量的反转部分; 设置时间点作为第二参考点，当输入信号在反转部分内具有离散值，并且计算每次目标值的所有误差路径时，目标值包括第二参考点处的输入信号的值 参考点和每次信号的值，并且误差路径是一组目标值; 利用反演部分内的输入信号的值和误差路径的值计算误差路径的累积误差，计算第二参考点的误差路径累积误差的最大值; 使用第二参考点处的最大值计算对数似然关系（LLR）值; 并用LLR值代替预定范围的反转部分内的输入信号的值并输出LLR值。 因此，仅通过与零点相交的信号的错误路径产生通过具有预定特性的信道的信号的软输出，从而显着地减少计算时间。

    Data modulation and correction methods
    12.
    发明公开
    Data modulation and correction methods 审中-公开
    Datenkorrekturverfahren

    公开(公告)号：EP1197967A2

    公开(公告)日：2002-04-17

    申请号：EP01307489.3

    申请日：2001-09-03

    申请人： SAMSUNG ELECTRONICS CO., LTD.

    发明人： Shim, Jae-seong ,  Lee, Kyung-geun, 122-1002 Sibeom Hanshin ,  Kim, Ki-hyun ,  Park, Hyun-soo

    IPC分类号： G11B20/14 ,  G11B20/18

    CPC分类号： H03M13/31 ,  G11B20/1426 ,  H03M5/145

    摘要： A data modulation method resistant to channel distortion and a method for correcting error in data coded by the modulation method are provided. The data modulation method uses a run length limited (RLL) modulation code applied to write data to an optical storage medium, the RLL modulation code being expressed as RLL ( d , k, m, n, s ) with s = 2 or greater, where d is minimum run length, k is maximum run length, m is the data bit length before modulation, n is the codeword bit length after modulation, and s is the space length between codewords. The data modulation and correction methods can reduce a redundancy in physical address data written to an optical storage medium with improved detection performance resistant to disturbance.

    摘要翻译： 提供了一种抵抗信道失真的数据调制方法以及用于校正通过调制方法编码的数据中的错误的方法。 数据调制方法使用用于向光存储介质写入数据的行程限制（RLL）调制码，RLL调制码表示为s = 2或更大的RLL（d，k，m，n，s） 其中d是最小游程长度，k是最大游程长度，m是调制前的数据比特长度，n是调制后的码字比特长度，s是码字之间的间隔长度。 数据调制和校正方法可以减少写入光存储介质的物理地址数据的冗余，并具有改善的抗干扰的检测性能。

    Code allocation method
    18.
    发明公开
    Code allocation method 审中-公开
    Kodeverteilverfahren

    公开(公告)号：EP1450492A2

    公开(公告)日：2004-08-25

    申请号：EP04010410.1

    申请日：2002-04-19

    申请人： Samsung Electronics Co., Ltd.

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

    IPC分类号： H03M5/14

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

    摘要： A method for allocating codewords is provided. The method includes allocating one of two selectable codewords b1 and b2 as codeword b when a preceding codeword b and a following codeword c form a code stream Y, in which codewords b1 and b2 have opposite INVs which are parameters indicating whether the number of '1s' contained in a codeword is an odd number or an even number and when the code stream of b1 and c is Y1, and the code stream of b2 and c is Y2, allocating codewords such that the INVs of Y1 and Y2 are maintained to be opposite when the codeword, b1, b2 or c should be replaced by another codeword in compliance with a predetermined boundary condition between codewords. According to the method, by using a short codeword having less bits as a main conversion codeword, high efficiency is achieved in recording density. Also, when codewords which do not satisfy the run length conditions are replaced by other codewords, the codewords are allocated so that the DC suppression capability of the code stream can be maintained, and therefore higher DC suppression capability of the code stream is provided.

    摘要翻译： 提供了一种用于分配码字的方法。 该方法包括：当前一码字b和后续码字c形成码流Y时，将两个可选码字b1和b2中的一个分配为码字b，其中码字b1和b2具有相反的INV，这些INV是指示“1” 码字中包含的数字是奇数或偶数，当b1和c的码流为Y1时，b2和c的码流为Y2，分配码字使得Y1和Y2的INV保持为 当码字b1，b2或c应该被符合码字之间的预定边界条件的另一个码字替换时相反。 根据该方法，通过使用具有较少位的短码字作为主转换码字，在记录密度方面实现高效率。 此外，当不满足游程长度条件的码字被其他码字替换时，分配码字，使得能够维持码流的直流抑制能力，因此提供码流的更高的DC抑制能力。

    Method and apparatus for encoding of low density parity check (LDPC) codes
    19.
    发明公开
    Method and apparatus for encoding of low density parity check (LDPC) codes 有权
    Verfahren und Vorrichtung zur Encodierung von Low Density Parity Check（LDPC）Codes

    公开(公告)号：EP1422829A2

    公开(公告)日：2004-05-26

    申请号：EP03256432.0

    申请日：2003-10-11

    申请人： SAMSUNG ELECTRONICS CO., LTD.

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

    IPC分类号： H03M13/00

    CPC分类号： H03M13/11

    摘要： An error correction coding apparatus includes a parity check matrix generation unit (110) 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 (130) which receives the parity check matrix from the parity check matrix generation unit (110), 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 (150) which receives the adjusted parity check matrix from the parity check matrix adjustment unit (130) 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，其生成具有每行中具有值1的元素数目的奇偶校验矩阵，其中每列具有值为1的预定数量的元素 并且具有值为0的其它元素; 从奇偶校验矩阵生成单元（110）接收奇偶校验矩阵的奇偶校验矩阵调整单元（130）在奇偶校验矩阵中搜索位于矩形的各个顶点的四个元素的周期形成组，并且具有值 1，并且当存在至少一个循环形成组时，用循环形成组的至少一个元素的值替换另一元素的值0，以在其中输出调整的奇偶校验矩阵而不具有循环形成组 ; 以及从所述奇偶校验矩阵调整单元（130）接收所述经调整的奇偶校验矩阵并接收m位消息字以执行LDPC编码的LDPC编码单元（150）。