发明名称 |
Data recorder with segment synchronization. |
摘要 |
<p>The beginning of a segment within a track of a record carrier, having a plurality of frames in each segment, is identified by detecting the presence of a control mark at a given position near the beginning of a frame, and the absence of a control mark at an adjoining position at which a control mark will be found in all other frames of the segment. The other frames of each segment are free from a mark at the given position. The next bit position containing a mark, after the given position and its adjoining position, is the clock bit position used for bit clock synchronization. An apparatus for reading these marks may include a qualification circuit for evaluating the magnitude of the difference in detector output at the given bit position and the adjoining bit position.</p> |
申请公布号 |
EP0603949(A1) |
申请公布日期 |
1994.06.29 |
申请号 |
EP19930203543 |
申请日期 |
1993.12.15 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
VERBOOM, JOHANNES, INT. OCTROOIBUREAU B.V.;WABLE, FRED |
分类号 |
G11B20/10;G11B7/007;G11B20/12;G11B27/10;G11B27/19;G11B27/24;G11B27/30;G11B27/36;(IPC1-7):G11B7/007 |
主分类号 |
G11B20/10 |
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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