发明名称 |
Information recording/reproducing apparatus, and pre-pit detecting method |
摘要 |
An information recording/reproducing apparatus (S) irradiates a light beam (B) on an optical disc (31) on which pre-pits (34) are formed, and performs recording and/or reproduction of information with respect to the optical disc according to a recording clock produced based on a wobble signal and a pre-pit signal. When recording information onto the optical disc having the pre-pits, a light beam is radiated to thereby extract the wobble signal and pre-pit signal. Then, according to the wobble signal and the pre-pit signal, a recording clock signal is produced, and information is recorded based on the recording clock signal. When producing a pre-pit signal, a push-pull signal is produced from the reflected light from the optical disc, and this signal is compared with a reference level (Vrp) to thereby detect a pre-pit. Here, when a pre-pit is not detected, the reference level is changed and the detection processing of the pre-pits is executed again. <IMAGE>
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申请公布号 |
EP1465166(A2) |
申请公布日期 |
2004.10.06 |
申请号 |
EP20040008753 |
申请日期 |
2002.07.24 |
申请人 |
PIONEER CORPORATION |
发明人 |
YANAGAWA, NAOHARU,;TANAKA, JUNJI,;AKABANE, SHIN,;SUGIYAMA, TAKAKAZU, |
分类号 |
G11B7/005;G11B7/007;G11B20/12;G11B20/14;G11B27/19;G11B27/24;(IPC1-7):G11B7/00;G11B7/08;G11B7/12 |
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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