Multilayer optical disc having disc information

摘要

A multi-layer record carrier is for recording information by writing marks in a track. The record carrier has a first recording layer ( 40 ) and a second recording layer ( 41 ), and each recording layer has a pregroove ( 14 ) indicating the position of the track according to an opposite track path. The pregroove exhibits a modulated wobble for representing control information. A lead-in part of the pregroove has first control information for the first recording layer, and the lead-out part on the second recording layer has second control information including recording parameters for the second recording layer. The device the device has a head ( 22 ) for providing the beam and wobble detection means ( 32 ) for retrieving control information from each layer.