发明名称 |
Land pre-pit address demodulating device |
摘要 |
In a land pre-pit address demodulating device DM for detecting land pre-pit address information during recording to a DVD-R/RW-disc, a tracking error signal TE is muted by a first reference potential V<SUB>ref1 </SUB>during a period in which the tracking error signal TE is generated from a reflected laser beam having a power for recording a mark, an RF residual component is removed from the tracking error signal TE, and the tracking error signal TE from which the RF residual component has been removed is compared with a second reference potential V<SUB>ref2</SUB>, thereby detecting a land pre-pit address signal.
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申请公布号 |
US7190643(B2) |
申请公布日期 |
2007.03.13 |
申请号 |
US20040837569 |
申请日期 |
2004.05.04 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
SHIBATA AKIHIRO;ICHIRYU DAI;SAKAI TAKAMASA |
分类号 |
G11B7/00;G11B5/09;G11B7/005;G11B7/007;G11B7/09;G11B7/125;G11B27/24 |
主分类号 |
G11B7/00 |
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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