Improvement of copy protection of the optical disk or the improvement which it is related to the copy protection of the optical disk

摘要

The probability which interferes disadvantageously vis-a-vis the legitimate user of extent and the disk where the copy protection which is offered on DVD becomes effectively becomes high. Here, it is proposed to the disk where the contents are arranged within the physical sector, that the sub version territory which possesses the structure which is similar to the genuine territory is offered on the disk. Each one of the sub version territory and the genuine territory one or extending is present in the plural physical sectors. The physical sector address which matches the address of the genuine territory is offered to the sub version territory. As for the navigation data, during normality playing back the territory where it is accessed is not the sub version territory and is the genuine territory, but while the copy, you guarantee that the sub version territory hides the genuine territory effectively.