发明名称 |
Recording medium identification apparatus, information reproduction apparatus and information recording apparatus |
摘要 |
A recording-medium-identification apparatus that emits a light beam onto a recording medium, is provided with: a light-receiving device which receives said reflected light beam that is reflected from said recording medium; a first extraction device which extracts a specified wobble-frequency signal from said output received-light signal that corresponds to the wobble frequency of the recording tracks on a specified recording medium from among a plurality of types of said recording media; a second extraction device which extracts another wobble-frequency signal from said output received-light signal that corresponds to the wobble frequency of the recording tracks on another recording medium other than the said specified recording medium from among a plurality of types of said recording media; and an identification device which uses at least said specified wobble-frequency signal or said other wobble-frequency signal to identify the type of said recording medium.
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申请公布号 |
US2004228249(A1) |
申请公布日期 |
2004.11.18 |
申请号 |
US20040831223 |
申请日期 |
2004.04.26 |
申请人 |
PIONEER CORPORATION |
发明人 |
GOTO HIROKI;NISHIO YOSHIMICHI;HASHIZUKA YOSHIHIRO;IWANO HIDEYASU;FUKAMACHI JUNICHI |
分类号 |
G11B7/004;G11B7/0045;G11B7/005;G11B19/12;G11B27/24;(IPC1-7):G11B7/00 |
主分类号 |
G11B7/004 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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