Method of managing copy protection information of a recording medium, recording medium with copy protection information for contents recorded thereon, and reproducing method for the recording medium
AssigneeLG Electronics Inc.
InventorsSang Suh, Jin Kim
Life of this patent
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Abstract
The present invention relates to a method of managing CPI (Copy Protection Information) for preventing unauthorized copy of encrypted content recorded on a high-density recording medium such as a BD-ROM (Blu-ray Disc ROM). In the present method, when main content data is recorded in encrypted manner, CPI that is necessary to decrypt the encrypted main content data is written in a predetermined PIC area and is also copied at least once in an area other than the PIC area.
Claims39
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A method of recording data on a recording medium, comprising:
- (a) generating a control information unit to control a recording or reproducing of data, wherein the control information unit includes an identifier to indicate where a copy protection information is recorded, the copy protection information is required for generating and/or processing a copy-protected data;
- and
- (b) recording the control information unit at a specific area of the recording medium.
A recording medium, comprising:
- a control data area including a control information unit to control a recording or reproducing of data, wherein the control information unit includes an identifier to indicate where a copy protection information is recorded, the copy protection information is required for generating and/or processing a copy-protected data;
- and
- a main data area where data is recorded or to be recorded.
Dependencies are inferred from the claim text.