Optical disk signal processing apparatus using modulated light source in a playback operation
    73.
    发明授权
    Optical disk signal processing apparatus using modulated light source in a playback operation 失效
    在重放操作中使用调制光源的光盘信号处理装置

    公开(公告)号:US06570830B1

    公开(公告)日:2003-05-27

    申请号:US09515596

    申请日:2000-02-29

    IPC分类号: G11B509

    摘要: An optical disk signal processing apparatus retains compatibility with the conventional continuous servo recording technique, and reduces the amount of noise included in a signal played back from the optical disk without the need to decrease the size of the area for recording data, resulting in a drastically increased signal-to-noise ratio. The optical disk signal processing apparatus has a light source, an optical system for leading a light beam generated by the light source, an optical device for converging the light beam output by the optical system and applying the converged beam to the rotating optical disk, a signal detecting optical system for detecting a signal reflected by the rotating disk through the optical device, and a light detecting instrument for converting light produced by the signal detecting optical system into an electrical signal and a data detecting circuit. The intensity of the beam radiated by the light source is modulated by a modulation circuit in synchronism with data detection timing so that a playback signal having an improved signal-to-noise ratio can be obtained by integrating a product of a response waveform signal generated by a light beam reflected from an information mark and a light-intensity modulating signal over a fixed period of time.

    摘要翻译: 光盘信号处理装置保持与传统的连续伺服记录技术的兼容性,并且减少了从光盘播放的信号中所包括的噪声量,而不需要减小用于记录数据的区域的大小,从而大大地 提高信噪比。 光盘信号处理装置具有光源,用于引导由光源产生的光束的光学系统,用于会聚由光学系统输出的光束并将会聚光束施加到旋转光盘的光学装置, 用于通过光学装置检测由旋转盘反射的信号的信号检测光学系统,以及用于将由信号检测光学系统产生的光转换成电信号和数据检测电路的光检测仪器。 由光源辐射的光束的强度由调制电路与数据检测定时同步地调制,使得具有改善的信噪比的重放信号可以通过将由 在固定时间段内从信息标记反射的光束和光强度调制信号。

    Method for reproducing information from optical medium
    76.
    发明授权
    Method for reproducing information from optical medium 有权
    从光学介质再现信息的方法

    公开(公告)号:US06430142B2

    公开(公告)日:2002-08-06

    申请号:US09918808

    申请日:2001-08-01

    IPC分类号: G11B700

    摘要: A method for reproducing information from an optical medium including a substrate with grooves and lands serving as recording tracks alternately formed on the substrate in a radial direction, the recording tracks are divided into recording units in the circumferential direction and each recording unit has a prepit area in a non-groove portion of the substrate including a first prepit representative of VFO information and a second prepit representative of address information. The first prepit and second prepit are located on both sides of a center line of one track and formed on each side of the center line of the one track so as to be shared with an adjacent track adjacent the one side of the center line of the track, and every prepit does not exist at opposing positions on both sides of the center line of one track. Information recorded on the optical medium is reproduced.

    摘要翻译: 一种用于从包括基板的光学介质再现信息的方法,所述基板具有在基板上沿径向交替形成的用作记录轨道的凹槽和凸台,所述记录磁道在圆周方向上分成记录单元,并且每个记录单元具有预凹坑区域 在所述基板的非凹槽部分中包括代表VFO信息的第一预凹坑和代表地址信息的第二预凹坑。 第一预凹坑和第二预凹坑位于一个轨道的中心线的两侧,并且形成在一个轨道的中心线的每一侧上,以便与邻近轨道的中心线的一侧相邻的轨道共享 轨迹,并且在一个轨道的中心线的两侧上的相对位置处不存在每个预凹坑。 记录在光学介质上的信息被再现。

    Method and apparatus for detecting position of alternated land and
groove of information recording medium
    77.
    发明授权
    Method and apparatus for detecting position of alternated land and groove of information recording medium 失效
    用于检测信息记录介质的交替焊盘和凹槽位置的方法和装置

    公开(公告)号:US6091678A

    公开(公告)日:2000-07-18

    申请号:US2830

    申请日:1998-01-05

    摘要: For a disk of a land/groove scheme with land tracks and grooves appearing alternately, in order to enable stable and reliable reproduction of information as recorded on a disk by stably and reliably detecting a specific position at which a land track and groove change therebetween, a technique is employed for detecting the position whereat one land track is changed to a groove, or vice versa, by utilizing an HPP signal rather than an RF signal in cases where an optical head 103 attempts to reproduce certain information at the pit formation position of a disk 101. In addition, detect the polarity--positive or negative--of a pit signal appearing in the HPP signal, and then detect the position whereat the land track and groove change therebetween based on the position at which the order or sequence thereof changes, thereby permitting effectuation of optical head's tracking control and focus control by a method suitable for its respective parts.

    摘要翻译: 对于具有交替出现的轨迹和凹槽的平台/凹槽方案的盘,为了通过稳定可靠地检测在其间的凹槽轨道和槽的变化的特定位置来使得能够稳定可靠地再现记录在盘上的信息, 在使用HPP信号而不是RF信号的情况下,采用一种技术来检测一条脊轨道改变为凹槽的位置,反之亦然。在光头103尝试在凹坑形成位置再现某些信息的情况下, 另外,检测出现在HPP信号中的凹坑信号的极性正或负,然后根据其顺序或顺序改变的位置来检测纹间和凹槽之间的位置。 从而可以通过适用于其各自部件的方法来实现光学头的跟踪控制和聚焦控制。