发明名称 |
Optical disc medium, reproduction method thereof and reproduction apparatus |
摘要 |
The pit arrays on an optical disc medium are made to wobble at a frequency which is higher than the band of frequencies that a tracking servo can follow and which is lower than the band of frequencies of the reproducing signal. A wobble detection signal according to the amount of wobble is obtained from the tracking error signal and used as a reference signal for frequency acquisition. Alternatively, the pit arrays on the medium are wobbled at a frequency which is within the band of frequencies that the tracking servo can follow and which is lower than the band of frequencies of the reproducing signal. In addition, a wobble detection signal corresponding to the amount of wobble is obtained either from the output signal from a compensator included in a tracking servo system or from a tracking drive signal and is used as a reference signal for frequency acquisition.
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申请公布号 |
US8520489(B2) |
申请公布日期 |
2013.08.27 |
申请号 |
US201113182092 |
申请日期 |
2011.07.13 |
申请人 |
IIZUKA JUNYA;HITACHI-LG DATA STORAGE, INC.;HITACHI CONSUMER ELECTRONICS CO., LTD. |
发明人 |
IIZUKA JUNYA |
分类号 |
G11B7/24 |
主分类号 |
G11B7/24 |
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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