| 摘要 |
An optical disk provided with a land region and a groove region that are formed on a substrate, the land region and groove region being used as a recording track that is the medium of the recording/playback of information signal, and a pre-pit region that is formed at the boundary part of neighboring land region and groove region and is disposed every other boundary part, the pre-pit region including specific information. characteristically, the specific information in neighboring pre-pit regions is not aligned in the radius direction of the optical disk. <IMAGE> |
