发明名称 |
Optical disc apparatus and method of reproducing a wobble signal |
摘要 |
An optical disc apparatus and a wobble signal detection method in which a light beam projected onto an optical disc and reflected by the optical disc is divided into at least four light regions in the direction corresponding to the radial direction of the optical disc to detect the light regions, and a wobble signal is detected by performing a subtraction on first and second difference signals, the first difference signal obtained by performing a subtraction on detection signals for the inner light regions of the divided and/or detected light beam and the second difference signal obtained by performing a subtraction on detection signals for the outer light regions of the divided and/or detected light beam. Accordingly, when a wobble signal is reproduced from an optical disc manufactured by a wobble modulation manner, a wobble signal is prevented from being degraded due to the interference (cross talk) from the wobbles of adjacent tracks, even though the track pitch of the optical disc is reduced to improve the recording density.
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申请公布号 |
US7266074(B2) |
申请公布日期 |
2007.09.04 |
申请号 |
US20020183969 |
申请日期 |
2002.06.28 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
KIM TAE-KYUNG;AHN YOUNG-MAN;KIM JONG-BAE;LEE JIN-KYUNG;CHUNG CHONG-SAM |
分类号 |
G11B7/005;G11B19/02;G11B7/007;G11B7/13;G11B7/135;G11B20/14;G11B27/19;G11B27/24;G11B27/30 |
主分类号 |
G11B7/005 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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