Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Mechanism control by the control signal
Patent
1998-04-08
2000-09-26
Psitos, Aristotelis M.
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Mechanism control by the control signal
369 50, G11B 509
Patent
active
061250899
ABSTRACT:
An ATIP decoder detects an ATIP synchronization signal from a wobble signal which was recorded on an optical disk as a wobble of pregrooves formed on the optical disk. A CD encoder performs EFM modulation on information to be recorded, inserting a subcode frame synchronization signal into the information to be recorded at a predetermined position, and outputting an EFM pattern to be recorded. The CD encoder includes an EFM outputting timing control circuit which controls a timing at which the EFM pattern is output. The EFM outputting timing control circuit performs information recording timing initialization, before the EFM pattern is actually recorded on the optical disk, in which initialization the phase between a timing at which the ATIP synchronization signal is detected from the optical disk and a timing at which the subcode frame synchronization signal is recorded on the optical disk is adjustable.
REFERENCES:
patent: 5335215 (1994-08-01), Yoshiyama
patent: 5553042 (1996-09-01), Usui
patent: 5737289 (1998-04-01), Udaagawa
Psitos Aristotelis M.
Ricoh & Company, Ltd.
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