Patent ID: 8356355

Claim:
A non-transitory storage medium having stored thereon data representing a stream of cells, the cells being addressable units of the stream, the stream comprising content cells and navigation data, the content cells being linked in accordance with the navigation data, at least one of the cells of the stream being a reproduction obstructing cell physically stored before or after a linked content cell, said at least one reproduction obstructing cell forming part of said cells of the stream, wherein the content cells, at least one of said navigation data, and the at least one reproduction obstructing cell are arranged such that accessing the data on the storage medium in a copy mode, in which the content cells, the navigation data, and the at least one reproduction obstructing cell are to be copied from the storage medium onto a recordable record carrier and the content cells are not accessed according to said navigation data, provides disturbed data access of reduced quality, whereas accessing the data on the storage medium in a reproduction mode, in which the content cells are accessed according to said navigation data, provides undisturbed access, wherein said at least one reproduction obstructing cell is arranged such that access in said reproduction mode includes navigating around said at least one reproduction obstructing cell when linked content cells are accessed, whereas access in said copy mode includes accessing linked content cells in addition to said at least one reproduction obstructing cell.