Disc apparatus
AssigneeSanyo Electric Co., Ltd.
InventorYasuhiro Muraoka
Life of this patent
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Abstract
A disc apparatus is disclosed that includes a jitter-value detection unit configured to detect a jitter value based on a signal to be read from a medium. A detrack-value setting unit is configured to set a detrack value for focusing an objective lens in the medium based on the jitter value. A detrack-value adjusting unit is configured to detect the jitter value every time the detrack value is changed stepwise within a predetermined range of the detrack value including a reference value of the detrack value, to obtain an optimum detrack value to be set in the detrack-value setting unit, based on a maximum jitter value and a minimum jitter value of the detected jitter values.
Claims18
A disc apparatus comprising:
- a jitter-value detection unit configured to detect a jitter value based on a signal to be read from a medium;
- a detrack-value setting unit configured to set a detrack value for focusing an objective lens in the medium based on the jitter value;
- and
- a detrack-value adjusting unit configured to detect the jitter value every time the detrack value is changed stepwise within a predetermined range of the detrack value including a reference value of the detrack value, to obtain an optimum detrack value to be set in the detrack-value setting unit, based on a maximum jitter value and a minimum jitter value of the detected jitter values.
A disc apparatus comprising:
- a jitter value detection unit configured to detect a jitter value based on a signal to be read from a medium;
- a tilt-value setting unit configured to set a tilt value for focusing an objective lens in the medium based on the jitter value;
- and
- a tilt-value adjusting unit configured to detect the jitter value every time the tilt value is changed stepwise within a predetermined range of the tilt value including a reference value of the tilt value, to obtain an optimum tilt value to be set in the tilt-value setting unit based on a maximum jitter value and a minimum jitter value of the detected jitter values.
Dependencies are inferred from the claim text.