发明授权
- 专利标题: Optical disc recording apparatus, optical disc recording circuit and optical disc
- 专利标题(中): 光盘记录装置,光盘记录电路和光盘
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申请号: US12599118申请日: 2009-03-04
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公开(公告)号: US08351312B2公开(公告)日: 2013-01-08
- 发明人: Masaru Yamaoka , Yuji Takagi , Takeharu Yamamoto , Makoto Usui
- 申请人: Masaru Yamaoka , Yuji Takagi , Takeharu Yamamoto , Makoto Usui
- 申请人地址: JP Osaka
- 专利权人: Panasonic Corporation
- 当前专利权人: Panasonic Corporation
- 当前专利权人地址: JP Osaka
- 代理机构: Wenderoth, Lind & Ponack, L.L.P.
- 优先权: JP2008-062187 20080312
- 国际申请: PCT/JP2009/000967 WO 20090304
- 国际公布: WO2009/113271 WO 20090917
- 主分类号: G11B20/10
- IPC分类号: G11B20/10 ; G11B7/26
摘要:
An optical disc recording apparatus (10) is provided with a tracking servo (13) for tracking a spiral track of concave and convex marks, an analog signal processor (14) for extracting a reproduction signal corresponding to the concave and convex marks, a digital signal processor (15) for extracting a channel clock synchronized with a channel bit length of the concave and convex marks, and a sub-information recording section (30) for recording sub-information by irradiating laser light based on the tracking to the spiral track. The sub-information recording section (30) records all the sub-information by repeating a process of recording a part of the sub-information by discretely irradiating laser light at a specified interval and with a specified frequency in synchronism with a channel clock by one tracking to form recordable marks on a reflective film a plurality of times. By this construction, a tracking control to the concave and convex marks can be stably executed and the sub-information can be stably recorded.