Method of and apparatus for differentiating between writable disc types
A plurality of types of writable discs (201) on which wobbles having a predetermined frequency containing absolute addresses and/or various pieces of information on the writable discs (201) can be discriminated by controlling only focusing and using an amplitude of a wobble signal or a wobble PLL lo...
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| Format: | Patent |
| Sprache: | eng ; fre ; ger |
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| Zusammenfassung: | A plurality of types of writable discs (201) on which wobbles having a predetermined frequency containing absolute addresses and/or various pieces of information on the writable discs (201) can be discriminated by controlling only focusing and using an amplitude of a wobble signal or a wobble PLL lock signal that has passed through a phase locked loop. Accordingly, a discrimination time can be reduced and a disc (201) in an unrecorded state can also be discriminated. |
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