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156 条记录 (耗时 0.062 秒)

    Apparatus and method for detecting binary data
    22.
    发明申请
    Apparatus and method for detecting binary data 有权
    二进制数据检测装置及方法

    公开(公告)号：US20050025261A1

    公开(公告)日：2005-02-03

    申请号：US10870445

    申请日：2004-06-18

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

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

    IPC分类号： G11B20/10 ,  G11B20/00 ,  G11B20/18 ,  H03M13/41 ,  H04B1/38

    CPC分类号： G11B20/10148 ,  G11B20/10009 ,  G11B20/10055 ,  G11B20/10101 ,  G11B20/10111 ,  G11B20/10296

    摘要： A method and apparatus detecting binary data, the apparatus includes an analog-to-digital (AD) converter converting the input analog signal into a digital signal; at least one binarization unit converting the digital signal into binary data; a viterbi decoder performing viterbi decoding to detect binary data from the digital signal; and a level detector receiving the digital signal, receiving at least two binary data from one of the viterbi decoder and the at least one binarization unit, and detecting and outputting a level value for the viterbi decoding from the digital signal when a number of the at least two binary data, which correspond to each other on a time axis and have the same values, is equal to or greater than a predetermined number. Accordingly, it is possible to more precisely detect binary data from an analog signal.

    摘要翻译： 一种检测二进制数据的方法和装置，该装置包括将输入的模拟信号转换为数字信号的模数（AD）转换器; 至少一个二进制化单元将数字信号转换为二进制数据; 维特比解码器执行维特比解码以从数字信号检测二进制数据; 以及电平检测器，接收数字信号，从维特比解码器和至少一个二进制化单元之一接收至少两个二进制数据，并且当数字信号的数量从数字信号中检测并输出维特比解码的电平值时 在时间轴上彼此对应并且具有相同值的至少两个二进制数据等于或大于预定数量。 因此，可以从模拟信号更精确地检测二进制数据。

    Method for generating land/groove switching signal from POLG type disc and apparatus therefor
    24.
    发明授权
    Method for generating land/groove switching signal from POLG type disc and apparatus therefor 失效
    用于从POLG型盘产生岸/沟切换信号的方法及其装置

    公开(公告)号：US06333902B1

    公开(公告)日：2001-12-25

    申请号：US09293891

    申请日：1999-04-19

    申请人： Jae-seong Shim

    发明人： Jae-seong Shim

    IPC分类号： G11B700

    CPC分类号： G11B7/0901 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/0938 ,  G11B20/1217 ,  G11B27/19 ,  G11B27/24 ,  G11B27/3027 ,  G11B2220/20

    摘要： A method for generating a land/groove (L/G) switching signal from pits on a land/groove (POLG) type disc and an apparatus therefor. In the method for generating an L/G switching signal from pits on a POLG type disc having tracks with wobbles, in which header information is recorded in sectors of each track, the header information including physical identification data (PID) and a peak header and a bottom header distinguished by envelopes of the peak header signal and the bottom header signal and both the peak and bottom header signals having phases according to lands or grooves, the phases of the peak header signal and the bottom header signal are compared to determine a track switching point and the sequence of sectors is determined using the physical identification data of the disc. Then, the number of sectors included in each track is counted based on the number of wobble signal cycles reproduced from the disc, to determine a track switching point and a land/groove (L/G) switching signal is generated corresponding to the results of these steps. Therefore, a L/G switching point is accurately determined using the continuity of the PID and the number of wobbles signal cycles so that precise tracking control can be achieved.

    摘要翻译： 一种用于从陆/沟（POLG）型盘上的凹坑产生平台/凹槽（L / G）切换信号的方法及其装置。 在具有摆动轨迹的POLG型盘上的凹坑生成L / G切换信号的方法中，其中标题信息被记录在每个轨道的扇区中，标题信息包括物理识别数据（PID）和峰头，以及 通过峰值头部信号和底部标题信号的包络区分的底部报头，以及具有根据平面或凹槽的相位的峰值和底部标题信号以及峰值报头信号和底部报头信号的相位进行比较以确定轨道 使用盘的物理识别数据确定切换点和扇区序列。 然后，根据从盘重放的摆动信号周期的数量，对包含在每个轨道中的扇区数进行计数，以确定轨道切换点，并根据结果生成轨迹切换点（L / G）切换信号 这些步骤。 因此，使用PID的连续性和摆动信号周期的数量来精确地确定L / G切换点，从而可以实现精确的跟踪控制。

    Method of allocating RLL code having enhanced DC suppression capability, modulation method, demodulation method, and demodulation apparatus therefor
    25.
    发明授权
    Method of allocating RLL code having enhanced DC suppression capability, modulation method, demodulation method, and demodulation apparatus therefor 有权
    分配具有增强的DC抑制能力的RLL码的方法，调制方法，解调方法及其解调装置

    公开(公告)号：US06281815B1

    公开(公告)日：2001-08-28

    申请号：US09556827

    申请日：2000-04-21

    申请人： Jae-seong Shim ,  Yong-kwang Won ,  Jung-wan Ko

    发明人： Jae-seong Shim ,  Yong-kwang Won ,  Jung-wan Ko

    IPC分类号： H03M700

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

    摘要： An allocating method of allocating a run length limited (RLL) code having enhanced direct current (DC) suppression capability, modulation and demodulation methods, and a demodulation apparatus are provided. In order to control DC suppression, a pair of code groups having suppression controlling capability are allocated, and a (1, 8, 8, 12) code having DC suppression capability, in which a code word of the pair of code groups has the sign of code word sum value (CSV) parameter, which represent DC value in a code word, and the characteristic of an INV parameter, which predicts the transition direction of digital sum value (DSV) of the succeeding code word, both opposite to those of the code word which belongs to the other code group and corresponds to the same source code, is used and is appropriate to high-density optical disc system.

    摘要翻译： 提供一种分配具有增强的直流（DC）抑制能力的游程长度限制（RLL）码，调制和解调方法以及解调装置的分配方法。 为了控制DC抑制，分配具有抑制控制能力的一对代码组，以及具有DC抑制能力的（1,8,8,12）代码，其中该代码组对中的代码字具有符号 表示代码字中的DC值的代码字和值（CSV）参数以及INV参数的特性，该参数预测后续代码字的数字和值（DSV）的转移方向，两者与 使用属于其他代码组并且对应于相同源代码的代码字，并且适用于高密度光盘系统。

    Method of generating run length limited (RLL) code having improved DC suppression capability and modulation/demodulation method of the generated RLL code
    26.
    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
    27.
    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。