Optical disk drive and sequential signal producer and information recording and reproducing method

Abstract

An optical disc drive produces read gate signals for controlling the address and data read timing, and write gate signals for controlling the timing of data writing. During the disc speed is stable, the read gate signals and write gate signals are formed using the clock signal generated by an internal oscillator. However, when the disc speed becomes unstable, the read gates and write gates are formed using the clock signal generated by the signal reproduced from the disc.

Description

technical field [0001] The present invention relates to an optical disc device for recording information to and reproducing information from an optical disc, a timing signal generating device for generating a timing signal required for recording and reproducing information in the optical disc drive of the present invention, and a device for generating An information recording and reproducing method for recording information on an optical disc and reproducing information from the optical disc. Background technique [0002] Optical discs are currently widely used as high-capacity storage media, and continue to be developed and sold as peripheral devices for computer storage and audiovisual recording devices. [0003] Optical discs generally have recording grooves (pits) formed on the surface of the disc. Information is recorded on and reproduced from the optical disc by tracking and emitting a spot of light to the recording groove with a laser beam. A recording groove is gen...

AI Technical Summary

Problems solved by technology

[0017] However, according to the ZCLV control method described above, when retrieving between zones, due to the variation of disc angular velocity from partition to partition, a certain delay is required to resolve this specific speed.

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