- 专利标题： Recording state evaluation method, recording compensation method, and information recording/playback device
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申请号： US17487303申请日： 2021-09-28
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公开(公告)号： US11475918B2公开(公告)日： 2022-10-18
- 发明人: Yasushi Kobayashi , Kohei Nakata , Yasumori Hino
- 申请人： Panasonic Intellectual Property Management Co., Ltd.
- 申请人地址： JP Osaka
- 专利权人： Panasonic Intellectual Property Management Co., Ltd.
- 当前专利权人： Panasonic Intellectual Property Management Co., Ltd.
- 当前专利权人地址： JP Osaka
- 代理机构： Wenderoth, Lind & Ponack, L.L.P.
- 优先权： JPJP2019-066587 20190329
- 主分类号： G11B27/24
- IPC分类号： G11B27/24 ; G11B20/10 ; G11B7/0045
摘要：
A recording mark is formed on a recording medium by a predetermined recording signal, a playback signal of the recording mark formed on the recording medium is obtained, and an expected value signal of the playback signal based on the recording signal is generated. Based on an amplitude error between the playback signal and the expected value signal, and for each predetermined unit of the recording signal, a deviation amount of a mark shape of the recording mark from which the playback signal is obtained with respect to a mark shape of an ideal recording mark is calculated, and a mark shape of the recording mark formed on the recording medium is estimated. Based on the deviation amount of the mark shape of the recording mark, a correction amount is calculated for each predetermined unit of the recording signal, and a level of the recording signal is adjusted.
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