发明名称 |
Multi-level optical recording medium reproducing method and reproducing device |
摘要 |
A reproduction method for a multi-level optical recording medium according to the present invention rotates an optical recording medium, on which recording data has been recorded according to a multi-level recording method which sets several levels for light reflectivity of virtual recording cells, emits a reproduction laser beam towards the optical recording medium, and reproduces the recording data based on an electric signal generated in accordance with a received level of reflected light, the method setting the emission power of the reproduction laser beam in a range of 1.0 mW to 2.5 mW inclusive when the optical recording medium is rotated at a linear velocity in a range of 9 m/s to 25 m/s inclusive. By doing so, it is possible to improve the read accuracy for recording data while suppressing the reproduction deterioration of the optical recording medium to a level where deterioration effectively does not occur.
|
申请公布号 |
US2004240340(A1) |
申请公布日期 |
2004.12.02 |
申请号 |
US20040488109 |
申请日期 |
2004.03.10 |
申请人 |
TSUKAMOTO SYUJI;ARIOKA HIROYUKI;FUKUZAWA NARUTOSHI;HORAI TAKASHI;TAKE HIROSHI;INOUE MOTOHIRO |
发明人 |
TSUKAMOTO SYUJI;ARIOKA HIROYUKI;FUKUZAWA NARUTOSHI;HORAI TAKASHI;TAKE HIROSHI;INOUE MOTOHIRO |
分类号 |
G11B7/0045;G11B7/005;G11B7/013;G11B7/125;(IPC1-7):G11B7/00 |
主分类号 |
G11B7/0045 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|