公开(公告)号：US07272090B2

公开(公告)日：2007-09-18

申请号：US11401334

申请日：2006-04-11

申请人： Soo-yul Jung ,  Ju-wha Jin

发明人： Soo-yul Jung ,  Ju-wha Jin

IPC分类号： G11B7/095

CPC分类号： G11B20/225 ,  G11B7/0956

摘要： A tilt compensating device and method of performing normal tilt compensation in the event of a servo emergency which may occur during reproduction of data from an optical recording medium are provided. The tilt compensating device includes: an optical pickup; a tilt adjusting unit that adjusts a tilt angle of the optical pickup; a jitter detecting unit that detects an amount of jitter in a reproduction signal output from the optical pickup; and a controlling unit that monitors speed at which the optical recording medium operates using a phase-locked loop (PLL) signal generated from the reproduction signal and the degree of focus of the optical pickup, performs an operation to return to a normal state if any abnormality occurs, and controls operation of the tilt adjusting unit by comparing an amount of jitter detected at regular intervals against a reference. The present invention provides more stable tilt compensation compared to a conventional approach controlling a tilt driver in real time while monitoring jitter, thus improving disk reproduction capability.

摘要翻译： 提供了一种倾斜补偿装置以及在从光学记录介质再现数据期间可能发生的伺服紧急情况下执行正常倾斜补偿的方法。 倾斜补偿装置包括：光学拾取器; 倾斜调节单元，其调整光学拾取器的倾斜角; 抖动检测单元，其检测从所述光学拾取器输出的再现信号中的抖动量; 以及控制单元，其使用从再现信号产生的锁相环（PLL）信号和光学拾取器的焦度来监视光记录介质的运行速度，执行如果有的话返回到正常状态的操作 并且通过将以规则间隔检测到的抖动量与参考值进行比较来控制倾斜调整单元的操作。 本发明与监控抖动的传统方式相比，提供了更稳定的倾斜补偿，同时监视抖动，从而提高了磁盘再生能力。

公开(公告)号：US07224647B2

公开(公告)日：2007-05-29

申请号：US10624556

申请日：2003-07-23

申请人： Yong-seok Yoon ,  Soo-yul Jung

发明人： Yong-seok Yoon ,  Soo-yul Jung

IPC分类号： G11B7/00

CPC分类号： G11B7/0901 ,  G11B7/08541 ,  G11B7/095

摘要： A method, apparatus, and computer readable medium controlling a servo of a recording and/or reproducing apparatus, using a detected header field signal. An optical recording and/or reproducing apparatus includes a playback signal detector that detects a playback signal and a track error signal from information recorded on a DVD-RAM disc, as picked up by a pickup. A header field signal detecting circuit detects a header field signal by comparing a sampled playback signal for a signal representing the presence of a header field with a reference level and holding the comparison result for a predetermined period of time to generate the header field signal. Accordingly, a tracking servo can be stably controlled by using a tracking driving signal that is not affected by the presence of a header. Also, in a seek mode, the track error signal can be held based on the header field signal to generate a track count signal that is similarly not affected by the header. As a result, the number of tracks on the DVD-RAM disc can be accurately counted by using the track error signal.

摘要翻译： 一种使用检测到的标题字段信号来控制记录和/或再现装置的伺服的方法，装置和计算机可读介质。 光学记录和/或再现装置包括重放信号检测器，其由拾取器拾取的从记录在DVD-RAM盘上的信息中检测回放信号和轨道误差信号。 报头字段信号检测电路通过将表示标题字段的存在的信号的采样重放信号与参考电平进行比较并且将比较结果保持预定时间段来生成报头字段信号来检测报头字段信号。 因此，可以通过使用不受标题的存在影响的跟踪驱动信号来稳定地控制跟踪伺服。 此外，在搜索模式中，可以基于标题字段信号来保持轨道误差信号，以产生类似地不受报头影响的轨道计数信号。 结果，可以通过使用轨道误差信号来精确地计数DVD-RAM盘上的轨道数。