Patent ID: 7688704

Claim:
Record carrier of a writable type for recording information by writing marks in a track on a recording layer via a beam of radiation entering through an entrance face of the record carrier, the marks being detectable during scanning the track via the beam, the record carrier comprising at least a first recording layer ( 40 ) and a second recording layer ( 41 ), the first recording layer being present at a position closer to the entrance face ( 47 ) than the second recording layer, and a transparent spacer layer ( 42 ) between the recording layers, each recording layer comprising a pregroove ( 14 ) indicating the position of the track, the pregroove exhibiting a wobble constituted by displacements of the pregroove in a direction transverse to the longitudinal direction of the track, the wobble exhibiting a wobble modulation for representing control information, and the pregroove on the first recording layer ( 40 ) extending spirally in a first direction and the pregroove on the second recording layer ( 41 ) extending spirally in a second direction opposite to the first direction for constituting a multi-part recording area ( 54 , 57 ) interrupted by an intermediate zone that physically is constituted by a first intermediate part ( 55 ) located at the end of the first recording layer and a second intermediate part ( 56 ) located at the start of the second recording layer, the recording area being preceded by lead-in information ( 53 ) located at the start of the first recording layer and being followed by an ending part for lead-out information ( 58 ) or further intermediate information located at the end of the second recording layer, a lead-in part of the pregroove located at a part of the first recording layer intended for recording the lead-in information comprising said wobble modulation representing first control information including recording parameters for the first recording layer, and the ending part comprising said wobble modulation representing second control information including recording parameters for the second recording layer, wherein the recording parameters for the first recording layer are different from the recording parameters for the second recording layer.