| 摘要 |
PURPOSE To make it possible to record data such as user definable index information accompanying user data such as content data while keeping it possible to perform playback from an information recording medium also according to the conventional standard. CONFIGURATION The controller 19 records content data in the contents area of the user recordable area of the recording area of the optical disk 7, generates index information for referring to the contents of the content data, and records the index information in the Lead-Out area disposed outside the user recordable area of the optical disk.
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