公开(公告)号：US07009921B1

公开(公告)日：2006-03-07

申请号：US09563430

申请日：2000-05-03

Applicant: Tatsuhiro Otsuka ,  Seong-sin Joo ,  Chong-sam Chung ,  Young-man Ahn ,  In-sik Park ,  Hea-jung Suh ,  Byung-in Ma ,  Byoung-ho Choi

Inventor： Tatsuhiro Otsuka ,  Seong-sin Joo ,  Chong-sam Chung ,  Young-man Ahn ,  In-sik Park ,  Hea-jung Suh ,  Byung-in Ma ,  Byoung-ho Choi

IPC: G11B20/18

CPC classification number: G11B20/10009 ,  G11B7/005

Abstract: A method and circuit for providing a playback signal which is compensated for time delay. The circuit includes a time delay compensator for detecting a time difference between outputs of a photodetector and temporally matching part of the outputs of the photodetector and another part of the outputs of the photodetector, between which the time difference occurs, to compensate for time delay between different outputs of the photodetector, and an operational unit for summing the part of the outputs of the photodetector, which is compensated for the time delay, and the other part of the outputs of the photodetector to provide a playback signal. Accordingly, the circuit compensates for the time delay between the outputs of the photodetector, thereby increasing the degree of modulation of the data playback signal. In addition, the circuit maximumly suppresses the distortion or degradation of the signal and minimizes the occurrence of errors in the playback signal, thereby improving the reliability of the playback signal.

Abstract translation: 一种用于提供补偿时间延迟的重放信号的方法和电路。 该电路包括时间延迟补偿器，用于检测光电检测器的输出之间的时间差，并且在时间上匹配部分光电检测器的输出和光电检测器的输出的另一部分之间产生时差，以补偿光电检测器之间的时间延迟 光检测器的不同输出和用于对补偿了时间延迟的光电检测器的输出的一部分进行求和以及光电检测器的输出的另一部分以提供重放信号的操作单元。 因此，电路补偿光电检测器的输出之间的时间延迟，从而增加数据重放信号的调制程度。 此外，电路最大限度地抑制信号的失真或劣化，并且使重放信号中的错误的发生最小化，从而提高重放信号的可靠性。

公开(公告)号：US06977876B2

公开(公告)日：2005-12-20

申请号：US09895878

申请日：2001-07-02

Applicant: Byung-in Ma ,  In-sik Park ,  Chong-sam Chung ,  Jin-hoon Jeon ,  Tae-yong Doh ,  Byoung-ho Choi

Inventor： Byung-in Ma ,  In-sik Park ,  Chong-sam Chung ,  Jin-hoon Jeon ,  Tae-yong Doh ,  Byoung-ho Choi

IPC: G11B7/007 ,  G11B7/085 ,  G11B7/09 ,  G11B7/13 ,  G11B7/00

CPC classification number: G11B7/131 ,  G11B7/00718 ,  G11B7/08505 ,  G11B7/0901 ,  G11B7/0943

Abstract: An apparatus for and a method of detecting a defocus error signal. First, second and third light receiving regions of a photodetector are arranged in a radial direction of a recording medium to independently perform photoelectric conversion with respect to incident light which is reflected/diffracted by the recording medium. A subtractor subtracts a sum signal of detection signals from the first and third light receiving regions and a detection signal of the second light receiving region to output a defocus error signal, to detect defocus and/or a change in thickness of the recording medium. The defocus error signal and a push-pull tracking error signal are compared in a state in which a predetermined amount of defocus is applied to a light spot to detect a seek direction of the recording medium having a land/groove structure.

Abstract translation: 一种用于检测散焦误差信号的装置和方法。 首先，光电检测器的第二和第三光接收区域沿记录介质的径向布置，以独立地对由记录介质反射/衍射的入射光进行光电转换。 减法器从第一和第三光接收区域和第二光接收区域的检测信号中减去检测信号的和信号，以输出散焦误差信号，以检测记录介质的散焦和/或厚度变化。 在将预定量的散焦加到光点以检测具有岸台/槽结构的记录介质的寻道方向的状态下，比较散焦误差信号和推挽跟踪误差信号。

公开(公告)号：US20050068864A1

公开(公告)日：2005-03-31

申请号：US10991869

申请日：2004-11-19

Applicant: Byung-in Ma ,  In-sik Park ,  Joong-eon Seo ,  Jae-seong Shim

Inventor： Byung-in Ma ,  In-sik Park ,  Joong-eon Seo ,  Jae-seong Shim

IPC: G11B7/09 ,  G11B7/00

CPC classification number: G11B7/0901

Abstract: A method and apparatus for tracking error detection in an optical disk reproduction system. The tracking error detecting apparatus generates a tracking error signal as a difference signal of optical detection signals generated by more than two optical detectors positioned along a diagonal line from a track center and includes binarizers which binarize each output of the optical detectors, phase locked loops (PLLs) which generate respective clock signals synchronized with the outputs of each of the binarizers, a phase difference detector which detects a phase difference between the synchronized signals output from the PLLs, and low-pass filters which filter the output of the phase difference detector to output the result as the tracking error signal. The tracking error detecting apparatus generates a tracking error signal which is not dependent on the lengths of pits or marks recorded on an optical disk, enhancing the reliability of the tracking error signal.

公开(公告)号：US06744718B1

公开(公告)日：2004-06-01

申请号：US09704654

申请日：2000-11-03

Applicant: Jung-wan Ko ,  In-sik Park ,  Kyung-geun Lee ,  Du-seop Yoon ,  Seong-sin Joo ,  Jae-seong Shim ,  Byoung-ho Choi ,  Byung-in Ma ,  Yong-jin Ahn ,  Tatsuhiro Otsuka

Inventor： Jung-wan Ko ,  In-sik Park ,  Kyung-geun Lee ,  Du-seop Yoon ,  Seong-sin Joo ,  Jae-seong Shim ,  Byoung-ho Choi ,  Byung-in Ma ,  Yong-jin Ahn ,  Tatsuhiro Otsuka

IPC: G11B700

CPC classification number: G11B27/24 ,  G11B7/0045 ,  G11B7/005 ,  G11B7/007 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/26 ,  G11B20/1217 ,  G11B27/3027 ,  G11B2020/1239 ,  G11B2020/1268 ,  G11B2020/1278 ,  G11B2020/1279 ,  G11B2020/1287 ,  G11B2220/216 ,  G11B2220/2562 ,  G11B2220/2575

Abstract: A physical identification data (PID) addressing method using a wobble signal, a wobble address encoding circuit, a method and circuit for detecting the wobble address and a recording medium therefor. Groove tracks are classified into odd groove tracks and even groove tracks. Address information indicating physical identification information is phase modulated using wobble signals having a predetermined phase difference between two adjacent groove tracks, and recorded in each groove track so that address information modulated using the wobble signals having the phase difference of 90° between adjacent two groove tracks can be a quadrature phase shift keying (QPSK) signal. Accordingly, a larger amount of data can be recorded on the recording medium, and since an interval in which a wobble signal disappears is not caused, recovery of a wobble clock signal can be advantageously performed.

Abstract translation: 使用摆动信号的物理识别数据（PID）寻址方法，摆动地址编码电路，用于检测摆动地址的方法和电路及其记录介质。 凹槽轨道分为奇数槽轨道和均匀凹槽轨道。 指示物理识别信息的地址信息使用在两个相邻凹槽轨道之间具有预定相位差的摆动信号进行相位调制，并记录在每个凹槽轨道中，使得使用相邻两个凹槽轨道之间具有90°相位差的摆动信号调制的地址信息 可以是正交相移键控（QPSK）信号。 因此，可以在记录介质上记录更大量的数据，并且由于不会产生摆动信号消失的间隔，所以可以有利地进行摆动时钟信号的恢复。

公开(公告)号：US06584049B1

公开(公告)日：2003-06-24

申请号：US09698048

申请日：2000-10-30

Applicant: Byung-in Ma ,  In-sik Park ,  Joong-eon Seo ,  Chong-sam Chung

Inventor： Byung-in Ma ,  In-sik Park ,  Joong-eon Seo ,  Chong-sam Chung

IPC: G11B700

CPC classification number: G11B7/133 ,  G11B7/005 ,  G11B7/0901 ,  G11B7/094

Abstract: A tracking error signal detecting apparatus with improvement in offset due to gain characteristics and/or a difference in the depth between pits by providing an improved sectioning structure of an eight-sectional photodetector having inner and outer sectional plates, the radial widths of which vary along the tangential direction from the center of the photodetector, and a reproduction signal detecting apparatus with reduced crosstalk noise. The tracking error signal detecting apparatus can allow accurate tracking control in a high-density recording medium having relatively narrow tracks. Also, the reproduction signal detecting apparatus can correct signal distortion due to a difference between phase characteristics of detection signals of inner and outer sectional plates of a photodetector even during reproduction of an information signal from a high-density recording medium having relatively narrow tracks, thereby detecting an improved reproduction signal with greatly reduced crosstalk.

Abstract translation: 一种跟踪误差信号检测装置，其通过提供具有内部和外部截面板的八截面光电检测器的改进的分段结构，其由于增益特性和/或凹坑之间的深度的差异而具有偏移改善，其径向宽度沿着 来自光电检测器的中心的切线方向，以及具有降低的串扰噪声的再现信号检测装置。 跟踪误差信号检测装置可以允许在具有较窄轨迹的高密度记录介质中进行精确的跟踪控制。 此外，即使在来自具有相对窄的轨道的高密度记录介质的信息信号的再现期间，再现信号检测装置也可以校正由于光电检测器的内部和外部分段板的检测信号的相位特性之间的差异引起的信号失真，从而 检测出具有大大降低的串扰的改进的再现信号。

公开(公告)号：US6163516A

公开(公告)日：2000-12-19

申请号：US944563

申请日：1997-10-06

Applicant: Byung-In Ma

Inventor： Byung-In Ma

IPC: G11B20/14 ,  G11B7/00 ,  G11B7/005 ,  G11B19/02 ,  G11B20/10 ,  H03L7/06

CPC classification number: G11B20/10481 ,  G11B20/10009 ,  G11B20/10046 ,  G11B20/10222 ,  H03L7/06 ,  H03L7/0805

Abstract: A disc reproduction apparatus and method to reproduce an optical disc using a constant linear velocity (CLV) method. The disc reproduction apparatus includes an equalizer to receive a signal read from the optical disc and equalizing the received signal according to an equalization control signal, and a wide-capture range phase-locked loop (wide PLL) to perform a phase lock operation with regard to the received equalized signal based on a phase lock control signal. An automatic adjuster selects one of predetermined phase lock control value, according to a type of an optical disc to be used and reproduction velocity determined during initial operation, and a desired target position to read the data from the optical disc, and generates a phase lock control signal having the selected value. A correction unit selects one of a predetermined first equalization control value and a second equalization control value which is generated by the wide PLL and relates to a phase lock operation, according to the desired target position, and generates an equalization control signal having the selected equalization control value. Accordingly, the disc reproduction apparatus optimizes the characteristics of the equalizer, in the case of reproducing data from a compact disc (CD), a digital video disc (DVD), etc., at various reproduction velocities, using a constant linear velocity method and a wide-capture range phase-locked loop.

Abstract translation: 一种使用恒定线速度（CLV）方法再现光盘的盘再现装置和方法。 盘再现装置包括：均衡器，用于接收从光盘读取的信号，并根据均衡控制信号和宽捕获范围锁相环（宽PLL）对接收信号进行均衡，以执行相位锁定操作 基于相位锁定控制信号对所接收到的均衡信号。 自动调节器根据要使用的光盘的类型和在初始操作期间确定的再现速度以及从光盘读取数据的期望目标位置来选择预定的相位锁定控制值中的一个，并且产生锁相 控制信号具有所选择的值。 校正单元选择由宽PLL产生的预定的第一均衡控制值和第二均衡控制值中的一个，并且涉及根据所需目标位置的锁相操作，并产生具有所选均衡的均衡控制信号 控制值。 因此，在使用恒定的线速度法以各种再现速度从光盘（CD），数字视频盘（DVD）等再现数据的情况下，盘再现装置优化均衡器的特性， 宽捕捉范围锁相环。