发明申请
- 专利标题: OPTICAL DISC APPARATUS AND OPTICAL DISC REPRODUCTION METHOD
- 专利标题(中): 光盘设备和光盘再现方法
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申请号: US12116880申请日: 2008-05-07
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公开(公告)号: US20080285406A1公开(公告)日: 2008-11-20
- 发明人: Hiroyuki Moro , Yasuhiro Kanishima , Hideyuki Yamakawa , Tatsuji Ashitani
- 申请人: Hiroyuki Moro , Yasuhiro Kanishima , Hideyuki Yamakawa , Tatsuji Ashitani
- 申请人地址: JP Tokyo
- 专利权人: KABUSHIKI KAISHA TOSHIBA
- 当前专利权人: KABUSHIKI KAISHA TOSHIBA
- 当前专利权人地址: JP Tokyo
- 优先权: JP2007-128283 20070514
- 主分类号: G11B20/10
- IPC分类号: G11B20/10
摘要:
Provided is an optical disc apparatus which reproduces with use of a PRML method an optical disc having data recorded in a plurality of code lengths, the optical disc apparatus including: an AD conversion unit adapted to convert a reproduction signal of the optical disc into a multi-value digital signal; a waveform equalization unit adapted to perform waveform equalization on the multi-value digital signal on the basis of a predetermined partial response to generate an equalized reproduction signal; a decoding unit adapted to generate decoded data corresponding to data recorded on the optical disc from the equalized reproduction signal; and a crest value extraction unit adapted to extract a crest value for each of the code lengths on the basis of the decoded data and a type of the predetermined partial response.