| 摘要 |
An optical record carrier (2) and associated methods and devices are described. The carrier (2) comprises at least one user information layer (4a ,4b) arranged to be scanned by first radiation, and at least one content information layer (3a ,3b) or label layer. The content information layer comprises representing content information and having a first transmission for said first radiation and a second, lower transmission for a different, second radiation. |
