Optical disk having both constant linear and constant angular ve

Details Optical disk having both constant linear and constant angular ve Optical disk having both constant linear and constant angular ve

1996-04-08

1997-11-11

Edun, Muhammad N.

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

369 54, 369 58, 369 59, 369 47, G11B 700

Patent

active

056871481

ABSTRACT:
An optical disk having both CLV and CAV control regions is recorded by a recording system that allows moving from CLV control to CAV control without interrupting the data stream. The switching is accomplished by a switching device selecting between the output of a CAV control signal generator that is equipped with a divider which sets a certain number of frames or sectors for each single rotation of the disk and the output of a CLV control signal generator, a detector that detects whether the frequency and phase of the output of the signal generator of the drive motor and the control signal not selected by the switching device match, and the output of this detection means.

REFERENCES:
patent: 4558375 (1985-12-01), Sontheimer
patent: 4660189 (1987-04-01), Tsukamura et al.
patent: 4815063 (1989-03-01), Aoshima et al.

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