Patent ID: 7721338
Filing Date: 2010-05-18
Classification: G11B

Abstract:
1. A method of copying a copy protected optical disc, the copy protected optical disc carrying content and control data in a data area, the content being arranged in one or more content files, and the control data providing access to the content, wherein at least one region of the content which contains subversive data is provided within the data area, and navigation is provided for normal playback of the copy protected optical disc, the navigation comprising navigation paths defined by said control data which can be used for access to the content on the copy protected optical disc, and wherein during normal playback of the content on the copy protected optical disc utilizing the navigation paths, access to the at least one region of subversive data is prevented, the method comprising: mapping the navigation paths to identify regions of the data area which are not accessed by the navigation paths, accessing the content on the copy protected optical disc by navigating to the content utilizing the navigation paths provided for normal playback of the copy protected optical disc, but avoiding accessing any region identified as not accessed by the navigation paths, storing the accessed content in a corresponding data area, and storing arbitrary data into any regions of the corresponding data area which correspond to any region identified as not accessed by the navigation paths.