Recording medium identification apparatus, information reproduction apparatus and information recording apparatus
A recording-medium-identification apparatus that emits a light beam (9) onto a recording medium (1), is provided with: a light-receiving device (2) which receives the reflected light beam that is reflected from the recording medium; a first extraction device (41) which extracts a specified wobble-fr...
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| Format: | Patent |
| Sprache: | eng ; fre ; ger |
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| Zusammenfassung: | A recording-medium-identification apparatus that emits a light beam (9) onto a recording medium (1), is provided with: a light-receiving device (2) which receives the reflected light beam that is reflected from the recording medium; a first extraction device (41) which extracts a specified wobble-frequency signal from the 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 the recording media; a second extraction device (42) which extracts another wobble-frequency signal from the output received-light signal that corresponds to the wobble frequency of the recording tracks on another recording medium other than the specified recording medium from among a plurality of types of the recording media; and an identification device (6) which uses at least the specified wobble-frequency signal or the other wobble-frequency signal to identify the type of the recording medium. |
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