Disc having at least one servo area pit formed out of phase for

Details Disc having at least one servo area pit formed out of phase for Disc having at least one servo area pit formed out of phase for

1997-09-11

1999-05-11

Hindi, Nabil

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal gain processing

369 48, G11B7/00

Patent

active

059035331

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 converter 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 converter for converting the output RF signal of the photoelectric converter into a binary signal corresponding to the pit formed on the recording medium; and a detector 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 teh detector.

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