Method for reproducing information recorded on an optical record

Details Method for reproducing information recorded on an optical record Method for reproducing information recorded on an optical record

1993-02-25

1999-09-07

Huber, Paul W.

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

G11B 509

Patent

active

059497467

ABSTRACT:
In an optical recording medium on which the main information is recorded on a pre-formed recording track along the track direction and in which the recorded data are read out by optical means, frame sync signals based on the same format as the format for the main information are pre-recorded by offsetting the recording track itself along its width for each frame as an information recording unit, for facilitating frame synchronization and simplifying the construction through the use of a sole common synchronizing circuit. The information pre-recorded by offsetting the track itself along its width includes not only the frame sync signals but also any reproduce-only information for increasing the disc recording capacity. The reproducing circuit for reproducing the frame sync signals of the main information recorded along the track direction of the recording track, and the reproducing circuit for reproducing the frame sync signals having the same format as the main information among the information recorded by offsetting the track along its width, are formed as a common circuit for simplifying the circuit construction.

REFERENCES:
patent: 4375088 (1983-02-01), De Haan et al.
patent: 4464714 (1984-08-01), Huijser et al.
patent: 5077721 (1991-12-01), Sako et al.
patent: 5185732 (1993-02-01), Ogawa et al.
patent: 5297125 (1994-03-01), Yamagami et al.
patent: 5497367 (1996-03-01), Yamagami et al.

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