Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
Patent
1988-03-17
1990-08-14
Stephan, Steven L.
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Mechanism control by the control signal
369 47, 369124, G11B 700, G11B 2710
Patent
active
049493256
ABSTRACT:
In a method of recording/reproducing information associated with an apparatus and recording medium, the medium has an alternate formation including tracks of first regions wherein at least an optical record of preformatted pits at a constant time interval is recorded and second regions in which information is recorded so that optical retrieval can be achieved. A clock signal is generated based on the readout signal of the preformatted pits to record an information signal in the second regions, and the clock signal is retarded and used to read out data pits that are the record of the information in the second regions.
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Sector Servo Data File Optical Disk Memory, Yonezawa et al., SPIE, vol. 529, 1985.
Servo and Clock Sampling in the Optimem 1000, Miller et al., SPIE, vol. 529, 1985.
Ohtake Masatoshi
Saitoh Tadashi
Takasugi Wasao
Takeuchi Takashi
Tsuyoshi Toshiaki
Hitachi , Ltd.
Stephan Steven L.
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