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US 9,013,970 B2Granted
Method for copy protection
AssigneeSONY DADC Austria AG
InventorsMarkus Spitzlinger, Andreas Winter, Walter Hinterhoelzl, Peter Eisenmann, Klaus Holzapfel, Dominik Engel, Juergen Gruenberger
Life of this patent
Estimating the term…
Abstract
A method for copy protection in which an audiovisual or audio data is divided into a plurality of portions. The plurality of portions is at least partly scrambled and prepared so as to be stored on a record carrier in the scrambled order. This is done so that a physical position on the record carrier, e.g., a sector of the record carrier, where a respective portions of the divided data is stored depends on the scrambled order.
Claims21
A method for copy protection, comprising:
- providing audiovisual data or audio data having a genuine playback sequence defined by the content of the audiovisual data or audio data;
- dividing the audiovisual data or audio data into a plurality of portions, the portions having a first order, wherein when the portions are reproduced in the first order the content is reproduced in the genuine playback sequence;
- determining a second order for a subset of the portions, the second order being different than the first order;
- determining a physical position where, on a record carrier, a respective portion of the plurality of portions is to be stored dependent on the second order;
- storing a plurality of further first orders on the record carrier, the further first orders being different from the first order;
- and
- storing program instructions on the record carrier, the program instructions, when executed on a reading device configured to playback the record carrier, extract characteristic parameters of the record carrier, the first order being discriminable from the further first orders based on the characteristic parameters,
- wherein for a plurality of portions a copy of the respective portion is provided to be stored on the record carrier.
5 more elements
A method for reproducing content stored on a copy protected record carrier, the record carrier comprising a plurality of portions stored thereon, a subset of the plurality of portions being stored in a second order, and a copy of a subset of the plurality of portions being stored on the record carrier, the method comprising:
- determining a first order for the portions, the first order being different from the second order, wherein when the portions are reproduced in the first order the content is reproduced in a genuine playback sequence and/or genuine quality;
- reproducing at least a part of the portions consecutively according to the first order, the first order being determined from at least one characteristic parameter derived from the record carrier.
A device adapted to reproduce content stored on a copy protected record carrier, the record carrier comprising a plurality of portions stored thereon, a subset of the portions being stored in a second order, and a copy of a subset of the plurality of portions being stored on the record carrier, the device comprising:
- a processor adapted to determine a first order for the portions, the first order being different from the second order;
- a decoding unit adapted to reproduce at least a part of the portions consecutively according to the first order,
- the device further being configured to extract characteristic parameters of the record carrier, wherein based on the characteristic parameters the processor is configured to discriminate the first order from the further first orders.
A system comprising:
- a device adapted to reproduce content stored on a copy protected record carrier, the record carrier comprising a plurality of portions stored thereon, a subset of the portions being stored in a scrambled order, a copy of a subset of the plurality of portions being stored on the record carrier, the device including an interface adapted to receive via a network data representing a first order for the portions, the first order being different from the second order, and further including a decoding unit adapted to reproduce at least a part of the portions consecutively according to the first order,
- the device being further configured to extract characteristic parameters of the record carrier, wherein based on the characteristic parameters a processor of the device is configured to discriminate the first order from further first orders;
- and
- a server adapted to provide the first order for download by the device.
1 more element
A device adapted to manufacture a copy protected record carrier, comprising:
- a receiving unit adapted to receive audiovisual data or audio data having a genuine playback sequence defined by the content of the audiovisual data or audio data;
- a data processor adapted to divide the audiovisual data or audio data into a plurality of portions, the portions having a first order, wherein when the portions are reproduced in the first order the content is reproduced in the genuine playback sequence and/or in a genuine quality, wherein the processor is further adapted to determine a second order for a subset of the portions, the second order being different from the first order, and to provide a plurality of further first orders, and a copy of a subset of the plurality of portions, the data processor further being configured to determine program instructions on the record carrier, the program instructions, when executed on a reading device configured to playback the record carrier, extract characteristic parameters of the record carrier, the first order being discriminable from the further first orders based on the characteristic parameters;
- a writing unit adapted to write at least a part of the portions onto the record carrier in the second order, to store the further first orders and the program instructions on the record carrier, and to store the copy of the subset of the plurality of portions.
A record carrier, comprising:
- genuine audiovisual content or audio content stored in a plurality of portions on the record carrier, a subset of the plurality of portions being stored in a scrambled order and a copy of a subset of the plurality of portions stored on the record carrier, wherein when the subset of portions is reproduced in the scrambled order, the genuine audiovisual content or genuine audio is not reproduced in its genuine playback sequence;
- and
- program instructions executable on a playback device for the record carrier, wherein the program instructions when executed by the playback device cause the playback device to determine a first order for the portions, wherein when the portions are played back in the first order the genuine audiovisual or audio content is reproduced in its genuine playback sequence.
A method for copy protection of AV content to be stored on a record carrier, comprising:
- dividing the AV content into a plurality of portions;
- determining an order for a subset of the portions, when subset of the portions is reproduced in the order at least a part of the AV content is reproduced in a manner that is different to a genuine first order, and determining a subset of the plurality of portions to be stored as a copy;
- providing all of the portions so as to be stored on the record carrier, the subset of the portions being stored in the order;
- storing a plurality of further first orders on the record carrier, the further first orders being different from the first order;
- storing the copy of the subset of the plurality of portions;
- and
- storing program instructions on the record carrier, the program instructions, when executed on a reading device configured to playback the record carrier, extract characteristic parameters of the record carrier, the first order being discriminable from the further first orders based on the characteristic parameters.
4 more elements
Dependencies are inferred from the claim text.