Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1997-01-24
1998-03-17
Hindi, Nabil
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369 60, G11B 700
Patent
active
057295239
ABSTRACT:
A recording medium such as an optical or magneto-optical disk divided into servo areas and data areas, wherein at least one of pits in each servo area is formed with a phase deviation. There are also disclosed a method of recording pits on such a recording medium, and an apparatus for recording data on and/or reproducing the same from the recording medium. The apparatus comprises a light source for irradiating a light output to the recording medium; a photoelectric conversion means for receiving the light emitted from the light source and reflected from or transmitted through the recording medium, and converting the received light into an RF signal; a signal conversion means for converting the output RF signal of the photoelectric conversion means into a binary signal corresponding to the pit formed on the recording medium; and a detection means for detecting the servo area on the recording medium on the basis of the phase deviation of the binary signal outputted from the signal conversion means; wherein data is recorded or reproduced while a servo action is executed in accordance with the servo byte in the servo area detected by the detection means. The servo area is detectable with facility, and data of any pit pattern can be recorded and/or reproduced properly.
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Hindi Nabil
Sony Corporation
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