Back to results
US 2001/0026519 A1Published application
Glitch protection method in optical storage device
AssigneeVIA Technologies, Inc.
InventorMeng-Fu Lin
Life of this patent
Estimating the term…
Abstract
A track seeking and track locking method in an optical storage device capable of computing protection intervals such that any state transition of the TEZC signal and the RFZC signal within the computed protection interval is prohibited. The method is also capable of preventing the interference of the TEZC and the RFZC signal due to glitches in the TE signal and the RFRP signal, thus reducing track errors and speed computational errors.
Claims20
A track seeking and track locking method in an optical storage device, comprising steps of:
- providing a first track-cross signal and a second track-cross signals, wherein a phase difference exists between the first and the second track-cross signals;
- providing a third track-cross signal, wherein a first protection interval and a second protection interval are obtained according to a state change of the third track-cross signal;
- providing a fourth track-cross signal, wherein a third protection interval and a fourth protection interval are obtained according to a state change of the fourth track-cross signal;
- maintaining the current state of the third track-cross signal within the first and the third protection intervals;
- making the state of the third track-cross signal referring to the first track-cross signal during other than the first and the third protection intervals;
- maintaining the current state of the fourth track-cross signal within the second and the fourth protection intervals;
- and
- making the state of the fourth track-cross signal referring to the second track-cross signal during other than the second and the protection intervals.
5 more elements
A track seeking and track locking method in an optical storage device, comprising steps of:
- providing a first signal and a second track-cross signals, wherein a phase difference exists between the first and the second track-cross signals;
- setting a first and a second protection windows in response to a state change in the first track-cross signal;
- setting a third and a fourth protection windows in response to a state change in the second track-cross signal;
- generating a third and a fourth track-cross signals according to the first and the second track-cross signals, and the first, the second, the third and the fourth protection windows, wherein during the first and the third protection windows, the state of the third track-cross signal keeps;
- otherwise, the third track-cross signal is related to the first track-cross signal;
- and during the second and the fourth protection windows, the state of the fourth track-cross signals keeps;
- otherwise, the fourth track-cross signal is related to the second track-cross signal.
4 more elements
Dependencies are inferred from the claim text.