Piracy-protected recording media

• US 20060234003A1
• Filed: 04/14/2006
• Published: 10/19/2006
• Est. Priority Date: 04/18/2005
• Status: Abandoned Application

• Current Assignee: Richard H. Selinfreund
• Original Assignee: Richard H. Selinfreund
• Inventors: Selinfreund, Richard H.
• Application Number:
  US11/404,980
• Publication Number:
  US 20060234003A1
• Time in Patent Office: Days
• US Class Current: 428/64.400
• CPC Class Codes: G11B 19/122 involving the detection of an identification or authentication mark record carriers indicating unauthorised or prior use G11B23/28
• 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 20/00594 wherein the shape of recording marks is altered, e.g. the depth, width, or length of pits
• CPC Class Codes: G11B 20/00608 wherein the material that the record carrier is made of is altered, e.g. adding reactive dyes that alter the optical properties of a disc after prolonged exposure to light or air
• CPC Class Codes: G11B 2220/2504 Holographic discs; Holographic digital data storage [HDDS]
• CPC Class Codes: G11B 2220/2537 Optical discs
• CPC Class Codes: G11B 23/282 Limited play
• CPC Class Codes: G11B 7/24044 for storing optical interference patterns, e.g. holograms; for storing data in three dimensions, e.g. volume storage G11B7/24038 takes precedence
• CPC Class Codes: Y10T 428/24851 Intermediate layer is discontinuous or differential

Abstract

An optical medium piracy system employing a state-change material in association with a digital data indicia, wherein when state-change material is activated to change state, the optical medium moves from an unreadable to a readable condition, or from a less readable to more readable condition.

Claims

1. A piracy-protected recording medium comprising:

a data portion comprising indicia readable by a recording medium reader as data; and

a state-change material in association with at least a part of said data portion;

wherein the state-change material is operationally configured to interfere with the read by said reader of said data portion of said recording medium when in a first unactivated state but permits enhanced read by said reader of said data portion when in a second activated state.

2. The piracy-protected recording medium in accord with claim 1 wherein said state-change material is light activated between said first unactivated state and said second activated state.

3. A piracy-protected recording medium in accord with claim 1 wherein said state-change material changes upon activation from a first optical state to a second optical state.

4. A piracy-protected recording medium in accord with claim 1 wherein said state-change material changes upon activation from a first physical state to a second physical state.

5. A piracy-protected recording medium in accord with claim 1 wherein the state-change material is coated over the data portion.

6. A piracy-protected recording medium in accord with claim 1 wherein said indicia include nominal and non-nominal pits and/or lands.

7. A piracy-protected recording medium in accordance with claim 1 wherein the state-change material is an azo-based dye.

8. A piracy-protected recording medium in accordance with claim 1 wherein the state-change material is activated from said first inactivated state to said second activated state by sound waves.