Optical disc and optical disc drive

Abstract

An optical disc and an optical disc drive for the optical disc are provided which are suitable for recording data with a high density. The optical disc D uses both lands and grooves as recording tracks. Each of the tracks consists of one address segment and forty five data segments. The address segment is wobbled at one side thereof. Each of the data segments is a DC groove. The address segment records an address information including a sync signal, frame address, track address and CRC, a tilt pattern and a clock mark. The clock mark is adapted to reflect laser beam in one amount before the mark and in another amount after the mark. The tilt pattern has a different track pitch from those in other areas. The data segments record data magneto-optically.

Description

technical field [0001] The present invention relates to an optical disc on which lands and grooves are formed which together form a data recording track and an optical disc drive for the optical disc. Background technique [0002] Well-known data recording media include optical discs such as magneto-optical type, phase-change type, and the like. They include read-only ROM discs, recordable discs, recordable / reproducible RAM discs, so-called partial ROM discs having a ROM area and a RAM area, etc. [0003] In addition, in order to achieve a larger data storage capacity, some so-called land / groove recording type optical discs have been proposed, which are designed to record data on both lands and grooves. [0004] In these general optical discs, recording tracks are wobbled to provide servo control information and address information (ADIP) for data recording and playback. But in ordinary optical discs, due to the amount of light change caused by the wobble and the disturbin...

AI Technical Summary

Problems solved by technology

However, for such an optical disc drive, the disc tilt detection mechanism will increase the manufacturing cost

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