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US 2011/0211430 A1Published application
Disc discrimination apparatus and method
AssigneeJ&K Car Electronics Corporation
InventorsTakahiro Komatsu, Seiichiro Fujii, Masao Ubukata
Life of this patent
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Abstract
Detection is made as to at least one of a ratio between a tracking error and a focus error, and a duty cycle of an off-track signal with respect to an optical disc. A decision is made as to whether or not the optical disc is playable on the basis of the detected at least one of the ratio and the duty cycle. The ratio is a ratio of the focus error to the tracking error or a ratio of the tracking error to the focus error.
Claims12
A disc discrimination apparatus comprising:
- a detecting section configured to detect at least one of a ratio between a tracking error and a focus error, and a duty cycle of an off-track signal with respect to an optical disc;
- and
- a deciding section configured to decide whether or not the optical disc is playable on the basis of said at least one of the ratio and the duty cycle detected by the detecting section.
A disc discrimination method comprising the steps of:
- detecting at least one of a ratio between a tracking error and a focus error, and a duty cycle of an off-track signal with respect to an optical disc;
- and
- deciding whether or not the optical disc is playable on the basis of said detected at least one of the ratio and the duty cycle.
Dependencies are inferred from the claim text.