Optical recording medium, and method of manufacturing optical re

Details Optical recording medium, and method of manufacturing optical re Optical recording medium, and method of manufacturing optical re

1998-07-24

2000-12-12

Huber, Paul W.

Dynamic information storage or retrieval

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

Mechanism control by the control signal

3692754, G11B 509

Patent

active

061607762

ABSTRACT:
Accurate detection of a clock synchronization mark represented by wobbles of a track is realized. A track is wobbled by a synchronization mark signal which has a waveform such that the differential value near the leading portion and the trailing portion of the waveform is a value smaller than that of a rectangular wave, thereby wobbled portions corresponding to synchronization marks are formed. For example, a synchronization mark signal is a signal of a waveform such that both end portions of the waveform are almost linear, in which level variations are moderate, and the center of the waveform has sharp level variations.

REFERENCES:
patent: 5930228 (1999-07-01), Miyamoto et al.
patent: 5933411 (1999-08-01), Inui et al.
patent: 5943313 (1999-08-01), Ando et al.

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