发明名称 |
OPTICAL RECORDING AND REPRODUCING DISC |
摘要 |
The disclosure is directed to an optical recording and reproducing disc in which each track circumference of guide tracks formed into a concentric or spiral configuration is divided into a plurality of sectors for selective recording and reproduction of information in any desired sectors. Sector separating zones of predetermined configuration are provided at starting portions of the respective sectors, while predetermined sector marks indicating the sector separating zones are formed on an index track provided at an outer or inner periphery of the disc in positions corresponding to the sector separating zones so that, during selection of the sectors at recording and reproduction, reproduction signals by the sector marks are used for selection of the sectors, while starting of the recording and reproduction is effected by the reproduced information of the sector separating zones. |
申请公布号 |
DE3277512(D1) |
申请公布日期 |
1987.11.26 |
申请号 |
DE19823277512 |
申请日期 |
1982.11.24 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
SATOH, ISAO;YOSHIDA, TOMIO;OHARA, SHUNJI;KOISHI, KENJI |
分类号 |
G11B7/007;G11B7/013;G11B7/085;G11B27/19;G11B27/24;G11B27/30;G11B27/32;(IPC1-7):G11B7/00;G11B7/08 |
主分类号 |
G11B7/007 |
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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