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    • 3. 发明授权
    • Method and apparatus for tracking error detection in optical disk driver
    • 用于跟踪光盘驱动器中的错误检测的方法和装置
    • US07102967B1
    • 2006-09-05
    • US09613695
    • 2000-07-10
    • Byung-in MaIn-sik ParkJoong-eon SeoJae-seong Shim
    • Byung-in MaIn-sik ParkJoong-eon SeoJae-seong Shim
    • G11B7/00
    • G11B7/0906
    • 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.
    • 一种用于跟踪光盘再现系统中的错误检测的方法和装置。 跟踪误差检测装置产生跟踪误差信号,作为由沿着轨道中心的对角线定位的两个以上的光学检测器产生的光学检测信号的差分信号,并且包括将光学检测器的每个输出二值化的二进制化,锁相环( PLL),其产生与每个二进制数器的输出同步的相应时钟信号;相位差检测器,其检测从PLL输出的同步信号之间的相位差;以及低通滤波器,其将相位差检测器的输出过滤到 输出结果作为跟踪误差信号。 跟踪误差检测装置产生不依赖于记录在光盘上的凹坑或标记的长度的跟踪误差信号,增强跟踪误差信号的可靠性。
    • 6. 发明授权
    • Device for reducing cross talk in signal detecting apparatus used in an optical pickup device
    • 用于在光学拾取装置中使用的信号检测装置中减少串扰的装置
    • US06584049B1
    • 2003-06-24
    • US09698048
    • 2000-10-30
    • Byung-in MaIn-sik ParkJoong-eon SeoChong-sam Chung
    • Byung-in MaIn-sik ParkJoong-eon SeoChong-sam Chung
    • G11B700
    • G11B7/133G11B7/005G11B7/0901G11B7/094
    • 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.
    • 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。