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    • 1. 发明申请
    • Focus servo controlling method and apparatus and optical disk drive using the focus servo controlling method
    • 采用聚焦伺服控制方式对焦伺服控制方法及装置及光盘驱动器
    • US20090092020A1
    • 2009-04-09
    • US12285507
    • 2008-10-07
    • Seung-hoon KimKwan-ho Chun
    • Seung-hoon KimKwan-ho Chun
    • G11B7/00
    • G11B7/08511G11B7/0945
    • A method and apparatus for controlling a focus servo of an optical disk drive is provided. The focus servo controlling method includes the operations of, when an operating mode enters into a focus pull-in mode, detecting a period of time that satisfies a first threshold condition, the first threshold condition set to determine a duration in which a focal point of an optical signal emitted from a pickup is passing through a cover layer of a disk, the determination made by using a first signal proportional to a detected portion of an optical signal reflected by the disk, and preventing focus servo control from being performed during a detected period of time that first satisfies the first threshold condition since the operating mode entered into the focus pull-in mode.
    • 提供一种用于控制光盘驱动器的聚焦伺服的方法和装置。 聚焦伺服控制方法包括当操作模式进入聚焦拉入模式时检测满足第一阈值条件的时间段的操作,所述第一阈值条件被设置为确定焦点拉入模式的焦点的持续时间 从拾取器发射的光信号通过盘的覆盖层,通过使用与由盘反射的光信号的检测部分成比例的第一信号进行确定,并且防止在检测到的聚焦伺服控制期间执行聚焦伺服控制 从操作模式进入焦点拉入模式起首先满足第一阈值条件的时间段。
    • 3. 发明授权
    • Focus servo controlling method and apparatus and optical disk drive using the focus servo controlling method
    • 采用聚焦伺服控制方式对焦伺服控制方法及装置及光盘驱动器
    • US08085628B2
    • 2011-12-27
    • US12285507
    • 2008-10-07
    • Seung-hoon KimKwan-ho Chun
    • Seung-hoon KimKwan-ho Chun
    • G11B7/00
    • G11B7/08511G11B7/0945
    • A method and apparatus for controlling a focus servo of an optical disk drive is provided. The focus servo controlling method includes the operations of, when an operating mode enters into a focus pull-in mode, detecting a period of time that satisfies a first threshold condition, the first threshold condition set to determine a duration in which a focal point of an optical signal emitted from a pickup is passing through a cover layer of a disk, the determination made by using a first signal proportional to a detected portion of an optical signal reflected by the disk, and preventing focus servo control from being performed during a detected period of time that first satisfies the first threshold condition since the operating mode entered into the focus pull-in mode.
    • 提供一种用于控制光盘驱动器的聚焦伺服的方法和装置。 聚焦伺服控制方法包括当操作模式进入聚焦拉入模式时检测满足第一阈值条件的时间段的操作,所述第一阈值条件被设置为确定焦点拉入模式的焦点的持续时间 从拾取器发射的光信号通过盘的覆盖层,通过使用与由盘反射的光信号的检测部分成比例的第一信号进行确定,并且防止在检测到的聚焦伺服控制期间执行聚焦伺服控制 从操作模式进入焦点拉入模式起首先满足第一阈值条件的时间段。
    • 7. 发明申请
    • Method and apparatus for compensating audio/video synchronization
    • 用于补偿音频/视频同步的方法和装置
    • US20070248123A1
    • 2007-10-25
    • US11708044
    • 2007-02-20
    • Seung-hoon KimChang-yong Heo
    • Seung-hoon KimChang-yong Heo
    • H04J3/06
    • H04N21/2368H04N21/4305H04N21/4307H04N21/4341
    • An audio and video synchronization compensation method and apparatus for smoothly compensating audio and video synchronization in an audio and video system such as a DTV and a DVD player are provided. The apparatus includes a signal decoder unit which extracts time information for reproducing a video and/or audio signal and reference operation time information of a reproduction system from an input compressed stream; a signal synchronization control unit which determines the reproduction state of a signal by comparing reproduction time information of the stream with reference time information of the system, measures the difference between the reproduction time information and the reference time information in the determined signal reproduction state, and adjusts a transition speed used to approach from a signal reproduction interval to a signal synchronization interval according to a reproduction speed value of a pattern corresponding to the difference.
    • 提供了用于平滑地补偿诸如DTV和DVD播放器的音频和视频系统中的音频和视频同步的音频和视频同步补偿方法和装置。 该装置包括信号解码器单元,其从输入压缩流提取用于再现视频和/或音频信号的时间信息和再现系统的参考操作时间信息; 信号同步控制单元,其通过将流的再现时间信息与系统的参考时间信息进行比较来确定信号的再现状态,测量所确定的信号再现状态中的再现时间信息与参考时间信息之间的差异,以及 根据与差异对应的图案的再现速度值,将用于从信号再现间隔接近的转换速度调整到信号同步间隔。