DVD copy protection
AssigneeSONY DADC Austria AG
InventorsKlaus Holzapfel, Walter Hinterhoelzl, Guenther Kattner, Peter Meerwald
Life of this patent
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Abstract
A record carrier for storing at least one stream of linked content cells thereon, which linking is performed based on navigation data. The record carrier includes modified navigation data and/or a stream arrangement of at least one stream of linked content cells, so that an access of the at least one stream of linked content cells on the record carrier under consideration of the navigation data is not disturbed, whereas a generally linear access of the at least one stream of linked content cells on the record carrier is disturbed.
Claims41
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.
A method to provide copy protection of a non-transitory storage medium having stored thereon data representing a stream of cells, the method comprising:
- preparing the stream of cells, the cells being addressable units of the stream, the stream comprising content cells and navigation data;
- linking the content cells in accordance with the navigation data;
- inserting at least one reproduction obstructing cell 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 and at least one of said navigation data are arranged such that accessing the data on the storage medium in a copy mode, in which the data are to be copied from the storage medium onto a recordable record carrier and the content cells are not accessed in accordance with the 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 in accordance with the 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.
A method for producing at least one copy of at least a portion of data stored on a first non-transitory storage medium, the first 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 method comprising:
- linking the content cells in accordance with the navigation data, wherein to produce the at least one copy, data representing the stream of cells is accessed in accordance with the navigation data, and wherein said accessed data is transferred as a copy to a second non-transitory storage medium;
- and
- determining all reproduction obstructing cells physically stored before or after a linked content cell, and modifying or removing the determined reproduction obstructing cells such that the copy of the storage medium is not obstructed.
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, wherein the content cells and at least one of said navigation data are arranged such that accessing the data on the data carrier in a copy mode, in which the data are to be copied from the storage medium onto a recordable record carrier and the content cells are not copied in accordance with said navigation data, provides disturbed data access of reduced quality, whereas accessing the data on the data carrier in a reproduction mode, in which the content cells are accessed in accordance with said navigation data, provides undisturbed access.
A method to provide copy protection of 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 method comprising:
- linking the content cells in accordance with the navigation data, wherein the content cells and at least one of said navigation data are arranged such that accessing the data on the storage medium in a copy mode, in which the data are to be copied from the storage medium onto a recordable carrier and the content cells are not copied in accordance with 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 in accordance with said navigation data, provides undisturbed access.
Dependencies are inferred from the claim text.