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    Method of generating run length limited (RLL) code having improved DC suppression capability and modulation/demodulation method of the generated RLL code
    61.
    发明授权
    Method of generating run length limited (RLL) code having improved DC suppression capability and modulation/demodulation method of the generated RLL code 有权
    产生具有改善的DC抑制能力的行程限制（RLL）码和生成的RLL码的调制/解调方法的方法

    公开(公告)号：US06268810B1

    公开(公告)日：2001-07-31

    申请号：US09522446

    申请日：2000-03-09

    申请人： Jae-seong Shim ,  Yong-kwang Won

    发明人： Jae-seong Shim ,  Yong-kwang Won

    IPC分类号： H03M700

    CPC分类号： G11B20/1426 ,  H03M5/14 ,  H03M7/46

    摘要： A method of generating a run length limited (RLL) code having improved direct current (DC) suppression capability and modulation and demodulation methods of the generated RLL code. According to the method of generating the RLL codes, code words that satisfy a (d, k) run length constraint are generated. By allocating main code groups, in which a code word can be duplicated depending on the characteristics of the generated codeword and code words of each main code group are allocated in consideration of a code word sum value (CSV) parameter, which represents the DC value in a code word, and an inverse characteristic of an INV parameter, which predicts the transition direction of digital sum value (DSV) of the next code word, and allocating decision groups for differentiating the duplicated code words, by using some of the code words, which are already used in main code group, as code words for DSV groups for the DC suppression, the number of code word bits can be reduced and the recording density increases, while improving the DC suppression capability.

    摘要翻译： 一种生成具有改进的直流（DC）抑制能力和生成的RLL码的调制和解调方法的游程长度限制（RLL）码的方法。 根据生成RLL码的方法，生成满足（d，k）游程长度约束的码字。 通过分配主代码组，其中可以根据所生成的代码字的特性和每个主代码组的代码字来复制代码字，这是考虑到代码字总和值（CSV）参数来分配的，其代表DC值 在代码字中，以及INV参数的逆特性，其预测下一个代码字的数字和值（DSV）的转换方向，并且通过使用一些代码字来分配用于区分重复的代码字的决定组 已经在主代码组中使用，作为用于DC抑制的DSV组的代码字，可以减少代码字比特的数量并且记录密度增加，同时提高DC抑制能力。

    Method and apparatus for controlling rotation of an optical disk
    62.
    发明授权
    Method and apparatus for controlling rotation of an optical disk 失效
    用于控制光盘旋转的方法和装置

    公开(公告)号：US5528573A

    公开(公告)日：1996-06-18

    申请号：US234365

    申请日：1994-04-28

    申请人： Jae-seong Shim

    发明人： Jae-seong Shim

    IPC分类号： G11B19/02 ,  G11B19/247 ,  G11B19/28 ,  G11B7/00

    CPC分类号： G11B19/28 ,  G11B19/247

    摘要： A method and apparatus is disclosed for controlling the rotation of an optical disk of the type which has pre-grooves therein. The pre-grooves store wobble signals modulated by data. A first rotation control signal is generated by comparing the phases of the wobble signal reproduced from the optical disk and a reference signal. A second rotation control signal is also generated. This signal is an accelerating control signal for a next given period if the pulse width of the wobble signal is greater than a predetermined reference value when comparing the pulse width of the wobble signal and the predetermined reference value every period of the reference signal. The second signal is a moderating control signal for a next given period if the pulse width of the wobble signal is less than the predetermined reference value. The system and method selectively outputs the second rotation control signal if an error is produced at the time of demodulating the data from the reproduced wobble signal and the first rotation control signal if the data is demodulated normally. Accordingly, an unstable state caused by an operational abnormality during the phase control of a spindle servo system using a wobble signal can be stabilized quickly.

    摘要翻译： 公开了一种用于控制其中具有预凹槽的类型的光盘的旋转的方法和装置。 预凹槽存储由数据调制的摆动信号。 通过比较从光盘再现的摆动信号的相位和参考信号来生成第一旋转控制信号。 也产生第二旋转控制信号。 如果在参考信号的每个周期比较摆动信号的脉冲宽度和预定参考值时，如果摆动信号的脉冲宽度大于预定参考值，则该信号是下一给定周期的加速控制信号。 如果摆动信号的脉冲宽度小于预定的参考值，则第二信号是用于下一给定周期的调节控制信号。 如果在正常地解调数据时，如果在再现摆动信号和第一旋转控制信号解调数据时产生错误，则系统和方法选择性地输出第二旋转控制信号。 因此，能够快速稳定由使用摆动信号的主轴伺服系统进行相位控制时的运转异常引起的不稳定状态。

    Error correction method for high density disc
    67.
    发明授权
    Error correction method for high density disc 失效
    高密度光盘纠错方法

    公开(公告)号：US07739582B2

    公开(公告)日：2010-06-15

    申请号：US11429340

    申请日：2006-05-08

    申请人： Jae-seong Shim ,  Myoung-june Kim ,  In-sik Park

    发明人： Jae-seong Shim ,  Myoung-june Kim ,  In-sik Park

    IPC分类号： G06F11/00 ,  H03M13/00

    CPC分类号： H03M13/1515 ,  G11B20/10527 ,  G11B20/1217 ,  G11B20/18 ,  G11B20/1833 ,  G11B27/00 ,  G11B2220/2562 ,  G11B2220/2579 ,  H03M13/15 ,  H03M13/27 ,  H03M13/2703 ,  H03M13/29 ,  H03M13/2903 ,  H03M13/2906 ,  H03M13/2909 ,  H04L1/0057 ,  H04L1/0065 ,  H04L1/0071

    摘要： An error correction method for optical discs, and more particularly, an error correction method appropriate to high density discs is provided. The error correction method adds inner parity and outer parity to an error correction block of size n byte x m x o. The method comprises the steps of obtaining a plurality of inner parity blocks (PI blocks) by segmenting the error correction block in the inner parity (PI) direction into x segments; generating e-byte PI for each of the plurality of PI blocks generated by segmenting, and adding the e-bytes to the PI blocks PIs to the PI direction; and generating f-byte outer parity (PO) in the PO direction of the error correction block, and adding the POs to the PO direction. The error correction method enhances error correction capability while maintaining a redundancy of parity signal on a level similar to conventional DVDs.

    摘要翻译： 提供了一种光盘的纠错方法，特别是适用于高密度盘的纠错方法。 误差校正方法将内奇偶校验和外奇偶校验添加到大小为n字节×m×o的纠错块。 该方法包括以下步骤：通过将内部奇偶校验（PI）方向上的纠错块分割成x段来获得多个内部奇偶校验块（PI块）; 对通过分割生成的多个PI块中的每一个产生e字节PI，并将e字节添加到PI块PI到PI方向; 以及在纠错块的PO方向上产生f字节外部奇偶校验（PO），并将PO添加到PO方向。 误差校正方法提高了纠错能力，同时保持奇偶校验信号的冗余度与常规DVD类似。

    Error correction method for high density disc
    68.
    发明授权
    Error correction method for high density disc 有权
    高密度光盘纠错方法

    公开(公告)号：US07383491B2

    公开(公告)日：2008-06-03

    申请号：US11429307

    申请日：2006-05-08

    申请人： Jae-seong Shim ,  Myoung-june Kim ,  In-sik Park

    发明人： Jae-seong Shim ,  Myoung-june Kim ,  In-sik Park

    IPC分类号： G06F11/00 ,  H03M13/00

    CPC分类号： H03M13/1515 ,  G11B20/10527 ,  G11B20/1217 ,  G11B20/18 ,  G11B20/1833 ,  G11B27/00 ,  G11B2220/2562 ,  G11B2220/2579 ,  H03M13/15 ,  H03M13/27 ,  H03M13/2703 ,  H03M13/29 ,  H03M13/2903 ,  H03M13/2906 ,  H03M13/2909 ,  H04L1/0057 ,  H04L1/0065 ,  H04L1/0071

    摘要： An error correction method for optical discs, and more particularly, an error correction method appropriate to high density discs is provided. The error correction method adds inner parity and outer parity to an error correction block of size n byte x m x o. The method comprises the steps of obtaining a plurality of inner parity blocks (PI blocks) by segmenting the error correction block in the inner parity (PI) direction into x segments; generating e-byte PI for each of the plurality of PI blocks generated by segmenting, and adding the e-bytes to the PI blocks PIs to the PI direction; and generating f-byte outer parity (PO) in the PO direction of the error correction block, and adding the POs to the PO direction. The error correction method enhances error correction capability while maintaining a redundancy of parity signal on a level similar to conventional DVDs.

    摘要翻译： 提供了一种光盘的纠错方法，特别是适用于高密度盘的纠错方法。 误差校正方法将内奇偶校验和外奇偶校验添加到大小为n字节×m×o的纠错块。 该方法包括以下步骤：通过将内部奇偶校验（PI）方向上的纠错块分割成x段来获得多个内部奇偶校验块（PI块）; 对通过分割生成的多个PI块中的每一个产生e字节PI，并将e字节添加到PI块PI到PI方向; 以及在纠错块的PO方向上产生f字节外部奇偶校验（PO），并将PO添加到PO方向。 误差校正方法提高了纠错能力，同时保持奇偶校验信号的冗余度与常规DVD类似。