发明公开
EP1139338A2 Optical disk and method and apparatus for recording and then playing information back from that disc
失效
基本信息:
- 专利标题： Optical disk and method and apparatus for recording and then playing information back from that disc
- 专利标题（中）：光盘和用于该板的记录和再现的方法和装置
- 申请号：EP01110862.8 申请日：1995-03-17
- 公开(公告)号：EP1139338A2 公开(公告)日：2001-10-04
- 发明人： Yonemitsu, Jun , Iwamura, Ryuichi , Yoshimura, Shunji , Kawamura, Makoto
- 申请人： SONY CORPORATION
- 申请人地址： 7-35, Kitashinagawa 6-chome Shinagawa-ku Tokyo JP
- 专利权人： SONY CORPORATION
- 当前专利权人： SONY CORPORATION
- 当前专利权人地址： 7-35, Kitashinagawa 6-chome Shinagawa-ku Tokyo JP
- 代理机构： Melzer, Wolfgang, Dipl.-Ing.
- 优先权： JP7444494 19940319
- 主分类号： G11B7/125
- IPC分类号： G11B7/125 ; G11B7/007 ; G11B20/18
摘要：
A method of reproducing data from an optical disk having a diameter less than 140mm, a thickness of 1,2mm and a recording area divided into a lead-in area, and a program area, and wherein said data is recorded as pits representing modulated, error-correction encoded user information in sectors in user tracks in said program area and representing modulated, error-correcting encoded control information in sectors in one of said lead-in area or said program area, with said control information including addresses of respective user tracks, the tracks having a track pitch in the range of 0.646µm to 1.05µm, said method comprising the steps of rotating said disk to obtain a constant linear velocity;
projecting a pickup light beam through a lens for optically reading the rotating disk, said pickup light beam having a spatial frequency I=λ/2NA, where the spatial frequency I is less than the track pitch, λ is the wavelength of the pickup light beam and NA is the numerical aperture of the lens;
demodulating the data read from said disk;
error correcting the demodulated data;
separating the error corrected data into control information and user information; and
using said control information to access and read selected user tracks in response to access instructions from a user.
摘要（中）：
projecting a pickup light beam through a lens for optically reading the rotating disk, said pickup light beam having a spatial frequency I=λ/2NA, where the spatial frequency I is less than the track pitch, λ is the wavelength of the pickup light beam and NA is the numerical aperture of the lens;
demodulating the data read from said disk;
error correcting the demodulated data;
separating the error corrected data into control information and user information; and
using said control information to access and read selected user tracks in response to access instructions from a user.
从直径小于140毫米光盘上再现数据的方法，厚度为1.2毫米，记录区分成引入区，和节目区，和所述worin数据被记录为表示调制坑， 在在所述节目区的用户轨迹扇区的纠错编码的用户信息和表示调制，纠错在所述引入区或所述节目区中的一个扇区的编码的控制信息，与所述控制信息包括respectivement用户轨迹的地址 中，具有在0.646μm至1.05μm的范围中的轨道间距的导轨，所述方法包括转动所述盘以获得恒定线速度的步骤; 通过透镜投射一拾取光束，用于光学读取旋转盘，所述具有空间频率我拾取光束=“/ 2NA，其中空间频率I小于磁道间距，”是拾取光束的波长 和NA是透镜的数值孔径; 解调从光盘读出的数据与所述; 纠错解调数据; 分离误差校正后的数据到控制信息和用户信息; 并使用所述控制信息来访问，并响应读出所选的用户轨迹，以从用户访问的指令。