Multilayer optical disc having a layer indication

G - Physics – 11 – B

Patent

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Details

G11B 27/19 (2006.01)

Patent

CA 2519886

A multilayer record carrier is for recording information by writing marks representing addressable blocks in a track. Each recording layer has a pre- formed recording control pattern for indicating the track, the pattern comprising physical addresses (59) that indicate the physical position of the physical address with respect to a starting point of the track. The predefined number of bits of the physical address indicates the physical position with respect to a starting point of the track. At least one address bit of the predefined number of address bits of the physical address is allocated as a layer address bit (60) that has a value indicating the recording layer. A recording device has a layer unit (34) for detecting a recording layer in dependence of the layer address bit.

Un support d'enregistrement multicouche est destiné à enregistrer des informations au moyen de l'inscription de marques représentant des blocs adressables dans une piste. Chaque couche d'enregistrement présente un motif de commande d'enregistrement préformé indiquant la piste. Ce motif comprend des adresses physiques (59) indiquant la position physique de l'adresse physique par rapport à un point de départ de la piste. Le nombre prédéterminé de bits de l'adresse physique indique la position physique par rapport à un point de départ de la piste. Au moins un bit d'adresse parmi ledit nombre prédéterminé de bits est identifié comme un bit d'adresse de couche (60) qui présente une valeur indicative de la couche d'enregistrement. Un dispositif d'enregistrement comprend une unité de détection (34) de couche d'enregistrement se basant sur le bit d'adresse de couche.

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