发明名称 |
Method and apparatus for performing a memory operation on a fixed length block of data on a memory disk |
摘要 |
An optical disk apparatus has an optical head for recording information on or reproducing information from an optical disk. The optical disk has a number of spiral or concentric tracks and a number of sectors formed along the circumferential direction of the disk. The sectors are divided into a plurality of sector blocks along the circumferential direction of the disk. Each sector block includes a different number of sectors which are continuous along the circumferential direction and which have a substantially constant linear length. A memory stores at least the speed data for maintaining a constant relative speed between the optical head and optical disk and is determined for each block group having a predetermined number of blocks. Speed data corresponding to the designated sector block is read out from the memory and is supplied to a velocity control circuit. A motor is driven to maintain a constant linear velocity between the optical head and the tracks of the optical disk. |
申请公布号 |
US4641294(A) |
申请公布日期 |
1987.02.03 |
申请号 |
US19840625365 |
申请日期 |
1984.06.27 |
申请人 |
KABUSHIKI KAISHA TOSHIBA |
发明人 |
YOSHIMARU, TOMOHISA |
分类号 |
G11B7/00;G11B7/002;G11B7/004;G11B7/007;G11B19/20;G11B19/24;G11B20/12;G11B21/08;G11B27/10;G11B27/30;(IPC1-7):G11B7/007 |
主分类号 |
G11B7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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