System for copy protection of recorded information

• US 20030185130A1
• Filed: 04/25/2003
• Published: 10/02/2003
• Est. Priority Date: 10/05/1998
• Status: Active Grant

• Current Assignee: Antonius A.M. Staring, Franciscus L.A.J. Kamperman
• Original Assignee: Antonius A.M. Staring, Franciscus L.A.J. Kamperman
• Inventors: Kamperman, Franciscus L.A.J., Staring, Antonius A.M.
• Granted Patent: US 7,792,001 B2
• Time in Patent Office: Days
• US Class Current: 369/59.25
• CPC Class Codes: G11B 19/04 Arrangements for preventing, inhibiting, or warning against double recording on the same blank or against other recording or reproducing malfunctions
• CPC Class Codes: G11B 19/12 by sensing distinguishing features of or on records, e.g. diameter end mark
• CPC Class Codes: G11B 20/00086 Circuits for prevention of unauthorised reproduction or copying, e.g. piracy indicating unauthorised use of record carriers in general G11B23/28; scrambling for television signal recording H04N5/913; network architectures or network protocols for network security H04L63/00; cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
• CPC Class Codes: G11B 20/00615 said format change concerning the logical format of the recording medium, e.g. the structure of sectors, blocks, or frames
• CPC Class Codes: G11B 20/00884 involving a watermark, i.e. a barely perceptible transformation of the original data which can nevertheless be recognised by an algorithm

Abstract

An information carrier, e.g. an optical disc, comprises information arranged according to a recording format. The information includes format information indicative of parameters of the recording format such as start and stop addresses of user information. The information is recorded according to predefined encoding rules, which correspond to rules of a different recording format, e.g. CD-ROM or DVD, that prescribes a predefined location (12) on the information carrier for recording the format information. However the predefined location (12) comprises a confusion pattern (CON) and the format information is recorded at a second location (CPS1) different from the predefined location. A non-compliant player is unable to read or copy the information carrier because the reading is disturbed by the wrong parameters of the recording format. According to the invention a recorder is arranged for recording said confusion pattern and relocating said format information, whereas a player is arranged to retrieve the relocated format information.

Claims

1. Information carrier comprising information arranged according to a recording format, the information being recorded according to predefined encoding rules and including format information indicative of parameters of the recording format,

characterized in that, while said encoding rules correspond to rules of a different recording format that prescribes a predefined location on the information carrier for recording the format information, the predefined location comprises a confusion pattern and in that the format information is recorded at a second location different from the predefined location.

2. Information carrier as claimed in claim 1, characterized in that the second location is variably selected within a predefined area of the information carrier.

3. Information carrier as claimed in claim 1 or 2, characterized in that the information carrier comprises access information indicative of the location of the format information.

4. Information carrier as claimed in claim 1, 2 or 3, characterized in that the format information located at said second location is encrypted using an encryption key.

5. Information carrier as claimed in claim 4, characterized in that the information carrier comprises key information for decrypting said encrypted information.

6. Information carrier as claimed in any of the claims 1 to 5, characterized in that, while the format information comprises address information indicative of a user information area, the confusion pattern comprises fake address information indicative of an area different from the user information area.

7. Information carrier as claimed in claims 6, characterized in that the fake address information is indicative of an area comprising information recorded according to said different recording format.

8. Information carrier as claimed in any of the claims 1 to 7, characterized in that the format information comprises user key information for processing user information.

9. Player for reproducing information from the information carrier claimed in any of the claims 1 to 8, the player comprising format means for providing parameters of the recording format, and reading means for retrieving the information in dependence on the parameters of the recording format, characterized in that the format means are arranged for detecting the recording format of the information carrier, and in that the format means are arranged for supplying predefined parameters or for retrieving the format information from the second location when said recording format is detected.

10. Player as claimed in claim 9, characterized in that format means are arranged for detecting the recording format by detecting the confusion pattern from said predefined location and/or the access information.

11. Player as claimed in claim 9 or 10 for reproducing information from the information carrier claimed in any of the claims 3 to 8, characterized in that the format means are arranged for retrieving the format information from the second location in dependence on the access information and/or the key information.

12. Recorder for recording information arranged according to a recording format on an information carrier, the recorder comprising recording means for recording the information according to predefined encoding rules and for including format information indicative of parameters of the recording format,

characterized in that, while said encoding rules correspond to rules of a different recording format that prescribes a predefined location on the information carrier for recording the format information, the recording means are arranged for recording a confusion pattern at the predefined location and for recording the format information at a second location different from the predefined location.

13. Method for recording information arranged according to a recording format on an information carrier, in which method the information is recorded according to predefined encoding rules, and format information is included indicative of parameters of the recording format,

characterized in that, while said encoding rules correspond to rules of a different recording format that prescribes a predefined location on the information carrier for recording the format information, the method comprises recording a confusion pattern at the predefined location and recording the format information at a second location different from the predefined location.