Improvements in or relating to the copy protection of...

G - Physics – 11 – B

Patent

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G11B 20/00 (2006.01) G11B 7/007 (2006.01) G11B 20/10 (2006.01)

Patent

CA 2496137

Generally the more effective is the copy protection provided on an optical disc, such as a DVD, the greater is the likelihood that the copy protection will adversely interfere with legitimate uses of the optical disc. It is therefore proposed to include at least one region of subversive data within the content in the data area of an optical disc, and then to prevent access to each such region of subversive data during normal playback of the disc. For a DVD, the subversive data may be incorporated within video objects and/or may be in gaps between files in the DVD_Video zone. It is arranged that there are no navigable paths to the regions of subversive data.

En général, plus la protection de la copie est efficace sur un disque optique, comme un DVD, plus élevée est la probabilité d'altération malencontreuse de protection de la copie des applications légitimes des disques optiques. Il est donc proposé d'inclure au moins une zone de données subversives dans le contenu de la zone de données d'un disque optique et d'empêcher l'accès à chaque zone de données subversives, lors de la lecture normale du disque. Pour un DVD, les données subversives peuvent être incorporées dans des objets vidéo et/ou peuvent résider dans des trous entre fichiers, dans la zone vidéo du DVD. Il n'est prévu aucun chemin navigable vers les régions de données subversives.

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