Invention Grant
- Patent Title: Recording state evaluation method, recording compensation method, and information recording/playback device
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Application No.: US17487303Application Date: 2021-09-28
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Publication No.: US11475918B2Publication Date: 2022-10-18
- Inventor: Yasushi Kobayashi , Kohei Nakata , Yasumori Hino
- Applicant: Panasonic Intellectual Property Management Co., Ltd.
- Applicant Address: JP Osaka
- Assignee: Panasonic Intellectual Property Management Co., Ltd.
- Current Assignee: Panasonic Intellectual Property Management Co., Ltd.
- Current Assignee Address: JP Osaka
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JPJP2019-066587 20190329
- Main IPC: G11B27/24
- IPC: G11B27/24 ; G11B20/10 ; G11B7/0045
Abstract:
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.
Public/Granted literature
Information query
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