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    Data modulation and correction methods for use with data written to and read from recording media
    3.
    发明授权
    Data modulation and correction methods for use with data written to and read from recording media 失效
    数据调制和校正方法用于写入和读取记录媒体的数据

    公开(公告)号：US06600431B1

    公开(公告)日：2003-07-29

    申请号：US09973940

    申请日：2001-10-11

    申请人： Jae-seong Shim ,  Kyung-geun Lee ,  Ki-hyun Kim ,  Hyun-soo Park

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

    IPC分类号： H03M700

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

    摘要： A data modulation method resistant to channel distortion and a method of correcting error in data coded by the modulation method. 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 a data bit length before modulation, n is a codeword bit length after modulation, and s is a space length between codewords. Further, the data modulation method provides run lengths expressed as in+1=in+s (n=1, 2, . . . ), where i1=d.

    摘要翻译： 一种抗信道失真的数据调制方法以及通过调制方法编码的数据中的误差校正方法。 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调制码用s = 2或更大的RLL（d，k，m，n，s）表示， 其中d是最小游程长度，k是最大游程长度，m是调制之前的数据比特长度，n是调制后的码字比特长度，s是码字之间的间隔长度。 此外，数据调制方法提供了在+ 1 = in + s（n = 1,2，...）中表示的运行长度，其中i1 = d。

    CODE GENERATION AND ALLOCATION METHOD
    5.
    发明申请
    CODE GENERATION AND ALLOCATION METHOD 失效
    代码生成和分配方法

    公开(公告)号：US20080150770A1

    公开(公告)日：2008-06-26

    申请号：US12027317

    申请日：2008-02-07

    申请人： Jae-Seong Shim ,  Ki-hyun Kim ,  Hyun-soo Park ,  Kiu-hae Jung ,  Igbal Mahboob

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

    IPC分类号： H03M7/00

    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 “b” when a preceding codeword “a” and a following codeword “b” form a code stream X, in which the codewords b1 and b2 have opposite INV values which are parameters indicating whether the number of ‘1s’ contained in a codeword is an odd number or an even number. When the code stream of the preceding codeword “a” and the following codeword b1 is X1, and when the code stream of the preceding codeword “a” 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 “a” 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： 一种生成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b 1和b 2之一分配为码字“b”，其中码字b 1 并且b 2具有相反的INV值，它们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”的代码流和随后的码字b 1是X 1时，并且当前一个码字“a”和随后的码字b 2的码流是X 2时，分配这些码字， 当前一码字“a”或后续码字b 1（b 2）（b 1或b 2）应由符合预定边界条件的另一码字替换时，X 1和X 2的INV值保持相反 在码字之间给出。 分配码字使得能够维持码流的DC抑制能力。

    Coding and decoding method of suppressing DC component in codestream
    8.
    发明授权
    Coding and decoding method of suppressing DC component in codestream 失效
    抑制码流中DC分量的编码和解码方法

    公开(公告)号：US06696991B2

    公开(公告)日：2004-02-24

    申请号：US10160082

    申请日：2002-06-04

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

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

    IPC分类号： H03M700

    CPC分类号： G11B20/1426 ,  G11B7/004

    摘要： A code modulation and demodulation method includes removing a DC component of a code stream to be modulated when source data is recorded on an optical information storage medium and controlling a suppression of the DC component contained in the code stream when the source data is converted into a codeword to be recorded on an optical information storage medium. The method includes determining a control timing to suppress the DC component of the code stream to which the source data are converted, performing a code conversion at each control time for the DC component so that the code stream branches into a pair of branch code streams one of which extends in a direction where a running digital sum (RDS) of the code stream increases, and another one of which extends in the direction where the RDS of the code stream decreases, and selecting the path of the code stream that has a most bounded path around RDS ‘0’ from the paths of the branch code streams each control time. By performing a regular DC suppression control when the source data is converted, and by selecting one of the branch code streams when the DC suppression control is performed, more DC components in the code stream can be effectively removed.

    摘要翻译： 代码调制和解调方法包括当源数据被记录在光学信息存储介质上时，去除要调制的码流的DC分量，并且当源数据被转换成一个时，控制对包含在码流中的DC分量的抑制 要记录在光信息存储介质上的码字。 该方法包括确定抑制源数据被转换的码流的DC分量的控制定时，在DC分量的每个控制时间执行码转换，使得码流分支成一对分支码流1 其中代码流的运行数字和（RDS）增加的方向延伸，另一个方向在代码流的RDS的方向上延伸，并且选择具有最多代码流的代码流的路径 每个控制时间从分支代码流的路径围绕RDS'0'的有界路径。 通过在源数据被转换时执行常规DC抑制控制，并且当执行DC抑制控制时通过选择一个分支代码流，可以有效地去除代码流中的更多的DC分量。

    Method for determining characteristics of signal and apparatus using the same
    9.
    发明授权
    Method for determining characteristics of signal and apparatus using the same 有权
    用于确定信号和使用其的装置的特性的方法

    公开(公告)号：US08385173B2

    公开(公告)日：2013-02-26

    申请号：US12823943

    申请日：2010-06-25

    申请人： Hyun-soo Park ,  Jae-wook Lee ,  Jae-seong Shim ,  Jung-hyun Lee ,  Eing-seob Cho ,  Eun-jin Ryu

    发明人： Hyun-soo Park ,  Jae-wook Lee ,  Jae-seong Shim ,  Jung-hyun Lee ,  Eing-seob Cho ,  Eun-jin Ryu

    IPC分类号： G11B7/00

    CPC分类号： G11B20/10009 ,  G11B2020/10555

    摘要： A method of determining characteristics of a signal and an apparatus using the method. The apparatus for determining characteristics of a signal includes: a level detector receiving sample values of a radio frequency (RF) signal and binary data obtained by binarizing the RF signal, generating selection signals based on the binary data, classifying each of the sample values of the RF signal into one of a plurality of levels using the selection signals, and outputting average values of sample values of each level; and a signal characteristics determiner determining a characteristics value that indicates the characteristics of the RF signal using the average values of the sample values belonging to each level.

    摘要翻译： 一种确定信号特性的方法和使用该方法的装置。 用于确定信号特性的装置包括：电平检测器，其接收射频（RF）信号的采样值和通过二值化RF信号获得的二进制数据，基于二进制数据产生选择信号，将每个样本值 使用所述选择信号将所述RF信号变换成多个电平之一，并输出各电平的采样值的平均值; 以及信号特性确定器，其使用属于每个级别的样本值的平均值来确定指示RF信号的特性的特性值。

    Frequency detection apparatus and method for generation of a clock signal for optical disc
    10.
    发明授权
    Frequency detection apparatus and method for generation of a clock signal for optical disc 失效
    用于产生光盘的时钟信号的频率检测装置和方法

    公开(公告)号：US08223603B2

    公开(公告)日：2012-07-17

    申请号：US10842646

    申请日：2004-05-11

    申请人： Hyun-soo Park ,  Jae-seong Shim

    发明人： Hyun-soo Park ,  Jae-seong Shim

    IPC分类号： G11B7/00

    CPC分类号： G11B20/10046 ,  G11B20/1403

    摘要： A frequency detection apparatus and method for generating a stable clock signal synchronized with an input signal and a signal boost filter used in the frequency detection apparatus and method, the frequency detection apparatus includes a signal boost filter filtering out the high frequency component of an input signal and boosting the high frequency component, and a frequency detector receiving an input signal with the boosted high frequency component and a clock signal, detecting a frequency difference between the input signal and the clock signal, and producing a control voltage corresponding to the frequency difference. Accordingly, even when there is a big difference between the frequency of the input signal and an oscillating frequency, a frequency error can be stably detected. Thus, a stable clock signal can be obtained.

    摘要翻译： 一种用于产生与在频率检测装置和方法中使用的输入信号和信号升压滤波器同步的稳定时钟信号的频率检测装置和方法，所述频率检测装置包括滤除输入信号的高频分量的信号升压滤波器 并且提高高频分量，以及频率检测器，接收具有升高的高频分量的输入信号和时钟信号，检测输入信号和时钟信号之间的频率差，并产生对应于频率差的控制电压。 因此，即使在输入信号的频率和振荡频率之间存在很大差异的情况下，也能够稳定地检测频率误差。 因此，可以获得稳定的时钟信号。