Patent ID: 7821908
Filing Date: 2010-10-26
Classification: G11B

Abstract:
1. An optical disc of a single-sided dual layer where a light transmission layer, a DVD layer as a first recording layer accessed with a red laser beam, a space layer, and a second recording layer accessed with a blue-violet laser beam are arranged in that order in the direction in which a laser beam enters, different format information being recorded on the DVD layer and the second recording layer, the optical disc comprising: an area recording density of the second recording layer being three times or more than that of the DVD layer; identification information indicating, that the second recording layer is formed, being formed with detail information related to the DVD layer on Physical format information on a control data zone in a Lead-in area of the DVD layer; and identification information indicating, that the DVD layer is formed, being formed with detail information related to the second recording layer on Physical format information on a control data zone in a Lead-in area and/or identification information indicating, that the DVD layer is formed, being formed with the detail information related to the second recording layer on Physical format information on a BCA area of the second recording layer, wherein the information in the DVD layer includes initial screen information for a menu indicating that the optical disc includes DVD content and the second recording layer's content when audio and visual works recorded in an area in the DVD layer are played back, and the information in the second recording layer includes initial screen information for a menu indicating that the optical disc includes DVD content and the second recording layer's content when audio and visual works recorded in an area in the second recording layer are played back.