High-density optical disc and recording/reproducing method...

G - Physics – 11 – B

Patent

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Details

G11B 7/007 (2006.01) G11B 20/12 (2006.01) G11B 27/32 (2006.01) G11B 7/0037 (2006.01) G11B 7/005 (2006.01) G11B 7/24 (2006.01)

Patent

CA 2464221

A high-density optical disc such as BD-RE (Blu-ray Disc Rewritable) or BD-ROM, and a recording/reproducing method thereof are disclosed. Diverse additional information such as disc reflectivity information, disc layer information or disc type information is efficiently recorded in a particular information field included in a data unit recorded on the burst cutting area of a high- density optical disc or a particular 1-byte address field included in an address unit recorded on the high-density optical disc so that it can be read when the high-density optical disc is loaded in an optical disc apparatus or when a data recording or reproducing operation for the high-density optical disc is carried out. Accordingly, it is possible to achieve optimal optical power control and automatic gain control or identification of a current position, while enabling a normal data recording or reproducing operation corresponding to the type of the optical disc.

Cette invention concerne un disque optique haute densité tel qu'un BD-RE (disque ré-enregistrable Blu-ray) ou BD-ROM, ainsi qu'un procédé d'enregistrement/reproduction. Des informations supplémentaires diverses, notamment sur la réflectivité du disque, les couches de disque ou le type de disque, sont enregistrées rationnellement dans une champ d'information spécifique inclus dans une unité de données dans une zone de séparation de rafales ou dans un champ d'adresse spécifique de 1 octet d'un disque optique haute densité, et peuvent être lues lorsque ce disque optique haute densité est chargé dans un appareil pour disques optiques de ce type pendant une opération d'enregistrement ou de reproduction de données. Par voie de conséquence, ce système rend possible une commande de puissance optimale et un commande de gain automatique, ou bien l'identification de la position actuelle, tout en permettant une opération normale d'enregistrement ou de reproduction de données correspondant au type du disque optique.

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