Optical disk recording device which detects pre-pit...

Details Optical disk recording device which detects pre-pit... Optical disk recording device which detects pre-pit...

2007-06-15

2011-11-22

Agustin, Peter Vincent (Department: 2627)

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal detecting using a clock signal

C369S059200

Reexamination Certificate

active

08064310

ABSTRACT:
An optical disk recording device that detects a shift of the recording position with respect to an optical disk, has a pre-pit distribution detecting circuit that detects the distribution of pre-pits for a plurality of wobbles based on binarized pre-pit signals obtained by binarizing pre-pit signals corresponding to pre-pits on said optical disk and a wobble counter value obtained by counting said binarized pre-pit signals in synchronization with a locked wobble, which is a wobble signal having a period corresponding to a wobble on said optical disk and fixed in phase; and a wobble slip determining circuit that compares the distribution of said pre-pits detected by said pre-pit distribution detecting circuit and a reference pre-pit distribution corresponding to a desired recording position, thereby determining the shift amount of the recording position with respect to said desired recording position for each wobble.

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patent: 2001-357620 (2001-12-01), None

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