利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

77 条记录 (耗时 0.022 秒)

    Optical disc and optical disc driving apparatus
    2.
    发明公开
    Optical disc and optical disc driving apparatus 失效
    Optische Platte und Laufwerkdafür

    公开(公告)号：EP1202257A2

    公开(公告)日：2002-05-02

    申请号：EP02000428.9

    申请日：1997-06-24

    申请人： MITSUBISHI DENKI KABUSHIKI KAISHA ,  MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Nakane, Kazuhiro ,  Ohata, Hiroyuki ,  Nagasawa, Masato ,  Gotoh, Kenji ,  Ishida, Yoshinobu ,  Satoh, Isao ,  Ohara, Shunji ,  Ishida, Takashi ,  Takemura, Yoshinari

    IPC分类号： G11B7/007 ,  G11B7/09

    CPC分类号： G11B7/00718 ,  G11B7/00745 ,  G11B7/0901 ,  G11B7/0938 ,  G11B7/094 ,  G11B27/19 ,  G11B27/24 ,  G11B27/3027

    摘要： An optical disc using a single-spiral land and groove track format enabling accurate tracking offset correction and reliable detection of the transition point between a land track and a groove track, and a driving apparatus therefor, are disclosed. Four physical address areas PID1, PID2, PID3, and PID4 are recorded to a header area such that PID1 and PID2 are offset one-half track pitch toward the outside circumference of the disc from the groove track center, and PID3 and PID4 are offset one-half track pitch toward the inside circumference of the disc from the groove track center, and the physical address areas PID1 - PID4 can be detected by means of a difference signal in the radial direction. The single frequency pattern area VFO at the beginning of each PID is lengthened by PID1 and PID3, thereby enabling tracking offset correction using a sum signal, and detection of the land-groove transition point using a difference signal obtained from the PID offset. The frequency of the VFO pattern may be set lower than the highest frequency of the channel bit sequences of the modulation method used on the disc. Address marks may employ a channel bit pattern which includes two sequenses which are longer than the longest mark length of the modulation method.

    摘要翻译： 公开了一种使用单螺旋纹脊和凹槽轨道格式的光盘，其能够进行轨迹和凹槽轨道之间的转变点的精确的跟踪偏移校正和可靠的检测，以及其驱动装置。 四个物理地址区域PID1，PID2，PID3和PID4被记录到标题区域，使得PID1和PID2从凹槽轨道中心向盘的外圆周偏移二分之一的轨道间距，并且PID3和PID4偏移一个 从槽轨道中心朝向盘的内圆周方向的轨道间距，并且物理地址区域PID1-PID4可以通过径向方向上的差分信号来检测。 每个PID开始时的单频模式区域VFO由PID1和PID3延长，从而使用和信号进行跟踪偏移校正，并使用从PID偏移获得的差分信号来检测纹槽转换点。 VFO模式的频率可以被设置为低于在盘上使用的调制方法的信道位序列的最高频率。 地址标记可以采用包括比调制方法的最长标记长度更长的两个序列的信道位模式。

    Reproduction apparatus for optical disk
    7.
    发明公开
    Reproduction apparatus for optical disk 失效
    用于光盘再现装置

    公开(公告)号：EP1049078A2

    公开(公告)日：2000-11-02

    申请号：EP00113179.6

    申请日：1997-04-09

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Koishi, Kenji ,  Ohara, Shunji ,  Ishida, Takashi ,  Satoh, Isao ,  Takemura, Yoshinari ,  Gushima, Toyoji ,  Deguchi, Hironori ,  Mitui, Yoshitaka

    IPC分类号： G11B7/00 ,  G11B7/007

    CPC分类号： G11B7/24085 ,  G11B7/0053 ,  G11B7/00718 ,  G11B7/00745 ,  G11B7/0079 ,  G11B7/0906 ,  G11B20/1426 ,  G11B27/19 ,  G11B27/24 ,  G11B27/3027 ,  G11B2020/1259 ,  G11B2220/2562

    摘要： An optical disk has a rewritable first recording area and a read-only second recording area. The first recording area includes first tracks composed of groove tracks and land tracks formed on an optical disk substrate alternately in a spiral or concentric shape. Each of the first tracks is divided into a plurality of first sectors, and each of the first sectors includes a first header region having identification data for identifying the first sector and a first data region for recording user data by forming recording marks by changing optical characteristics of a recording surface. The second data recording area includes second tracks formed with physical concave and convex shaped pit rows arranged on the optical disk substrate in a spiral or concentric shape. Each of the second tracks is divided into a plurality of second sectors, and each of the second sectors includes a second header region having identification data for identifying the second sector and a second data region having read-only data recorded as the pit rows. The first header region includes a physical concave and convex shaped first pit row. Each pit of the first pit row has a width in a radial direction of the optical disk substantially equal to a width of the groove track and is wobbled outward or inward from a center line of the groove track by about a quarter of a pitch of the groove track. The second header region includes a physical concave and convex shaped second pit row. Each pit of the second pit row has a width in the radial direction of the optical disk smaller than the width of the groove track and is formed substantially along the center line of the second track.

    High density disk apparatus
    10.
    发明公开
    High density disk apparatus 失效
    Plattengerätvon hoher Dichte。

    公开(公告)号：EP0487296A2

    公开(公告)日：1992-05-27

    申请号：EP91310641.5

    申请日：1991-11-19

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Honjo, Masahiro ,  Takemura, Yoshinari

    IPC分类号： G11B20/10 ,  G11B21/00

    CPC分类号： G11B21/003 ,  G11B7/08529 ,  G11B7/14 ,  G11B20/10 ,  G11B20/1258

    摘要： A rotating disk-shape recording medium (1) has, on each of its opposite sides, a recording area which is divided in a radial direction into n recording zones (a₁,a₂,b₁,b₂). A disk apparatus for reproducing information from and/or reproducing information from the recording medium has a first group of n heads (A₁,A₂) disposed to respectively oppose to the n recording zones on one side of the recording medium, and a second group of n heads (B₁,B₂) disposed to respectively oppose to the n recording zones on the other side of the recording medium, each head being movable to scan its corresponding recording zone. A head drive unit (4) causes each of the first group of n heads to move within its corresponding recording zone in a direction from an outer circumference to an inner circumference of the zone and each of the first group of n heads to move within its corresponding recording zone in a direction from an inner circumference to an outer circumference of the zone so that a sum of linear velocities of the first and second groups of n heads is substantially constant. Further, the first group of n heads and the second group of n heads respectively constitute n pairs of heads each being consituted by an i-th head from an outermost head of the first group and an i-th head from an innermost head of the second group ( i = 1 through n) such that a sum of linear velocities of each pair of heads is substantially constant and equal to a sum of linear velocities of another pair of heads.

    摘要翻译： 旋转盘状记录介质在其每个相对侧上具有沿径向被划分为n个记录区（n> / = 2）的记录区域。 用于从记录介质再现信息和/或再现信息的盘装置具有第一组n个头，分别与记录介质的一侧上的n个记录区分别对置，并且分别设置在第二组n个头 与记录介质另一侧的n个记录区相对，每个磁头可移动以扫描其对应的记录区。 头驱动单元使得第一组n个头中的每一个在其相应的记录区域内沿着从该区域的外周到内周的方向移动，并且第一组n个头中的每一个在其对应的记录区域内移动 在从该区域的内周到外周的方向上，使得第一组和第二组n个磁头的线速度之和基本上恒定。 此外，n个头部和第二组n个头部的第一组分别构成n对头部，每个头部由第一组的最外侧头部的第i个头部和从第一组件的最内侧头部的第i个头部 第二组（i = 1至n），使得每对头的线速度之和基本上恒定，并且等于另一对头的线速度之和。