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US 2012/0134249 A1Published application
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.
Claims18
A method for copy protection of an optical record carrier, comprising:
- determining program instructions to be stored on the optical record carrier, wherein a portion of the program instructions, when executed on a playback device, cause the playback device to check, in a first step, if encryption characteristics are present on the optical record carrier, and if encryption characteristics are deemed to exist, to verify, in a second step, the integrity of the encryption characteristics, wherein the program instructions initiate playback of genuine audiovisual or audio content stored on the optical record carrier in genuine quality only if, in the first step, it has been determined that the encryption characteristics are present on the optical record carrier, and if, in the second step, integrity has been verified.
A copy of an original record carrier, comprising:
- audiovisual or audio content, wherein the audiovisual or audio content is not copy protected, and wherein the copy does not comprise encryption characteristics of a standard used for copy protection of the original record carrier or the copy comprises corrupted encryption characteristics;
- program instructions, wherein a portion of the program instructions cause a playback device for playback of the audiovisual or audio content to check, in a first step, if encryption characteristics are present on the optical record carrier, and if this is the case to detect, in a second step, the corrupted encryption characteristics based on an integrity check, wherein the program instructions prevent playing back the audiovisual or audio content if, in the first step, it has been determined that the encryption characteristics are not present on the optical record carrier, or if, in the second step, corrupted encryption characteristics are detected.
A pre-recorded record carrier, comprising:
- audiovisual or audio content that is copy protected according to an encryption standard used for copy protection of the pre-recorded record carrier;
- encryption characteristics of the encryption standard;
- program instructions, wherein a portion of the program instructions cause a playback device for the pre-recorded record carrier to check, in a first step, that the encryption characteristics are present on the pre-recorded record carrier, and if this is the case to perform, in a second step, an integrity check of the encryption characteristics, wherein the encryption characteristics at least partly depend on the audiovisual or audio content and have been determined in accordance with the encryption standard for copy protection of the audiovisual or audio content at the time of manufacturing the pre-recorded record carrier, wherein the program instructions allow playing back the audiovisual or audio content only if, in the first step, it has been determined that the encryption characteristics are present on the optical record carrier, and if, in the second step, the integrity check was successful.
A method of manufacturing a record carrier, comprising:
- storing, on the record carrier, audiovisual or audio content;
- storing, on the record carrier, encryption characteristics that depend on the audiovisual or audio content;
- storing, on the record carrier, program instructions, wherein a portion of the program instructions cause a playback device for the record carrier to check, in a first step, that the encryption characteristics are present on the record carrier, and if this is the case to perform, in a second step, an integrity check of the encryption characteristics, wherein the program instructions prevent playing back the audiovisual or audio content in genuine quality if, in the first step, it has been determined that the encryption characteristics are not present on the optical record carrier, or if, in the second step, the integrity check was not successful.
Dependencies are inferred from the claim text.