Method and apparatus for controlling digital copying of digitally recorded information

• US 5,764,607 A
• Filed: 10/09/1996
• Issued: 06/09/1998
• Est. Priority Date: 10/27/1993
• Status: Expired due to Term

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Maeda, Shigemi, Akiyama, Jun, Kojima, Kunio
• Primary Examiner(s): Young, W. R.
• Application Number:
  US08/731,125
• Time in Patent Office: 608 Days
• Field of Search: 369/47-48, 369/50, 369/54, 369/58, 369/84, 369/111, 369/124, 360/15
• US Class Current: 369/47.12
• CPC Class Codes: G11B 19/02 Control of operating function, e.g. switching from recording to reproducing
• 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 20/00666 involving a step of erasing or nullifying data, e.g. data being overwritten with a random string
• CPC Class Codes: G11B 20/00768 wherein copy control information is used, e.g. for indicating whether a content may be copied freely, no more, once, or never, by setting CGMS, SCMS, or CCI flags
• CPC Class Codes: G11B 2220/218 Write-once discs
• CPC Class Codes: G11B 2220/2525 Magneto-optical [MO] discs
• CPC Class Codes: G11B 2220/2545 CDs
• CPC Class Codes: G11B 23/28 Indicating or preventing prior or unauthorised use, e.g. cassettes with sealing or locking means, write-protect devices for discs write-protect devices for tapes G11B23/042, G11B23/08714; dummy cassettes for locking in the drive G11B33/005
• CPC Class Codes: G11B 27/034 on discs G11B27/036, G11B27/038 take precedence
• CPC Class Codes: G11B 27/11 by using information not detectable on the record carrier
• CPC Class Codes: G11B 27/329 on a disc [VTOC]
• CPC Class Codes: G11B 7/28 Re-recording, i.e. transcribing information from one optical record carrier on to one or more similar or dissimilar record carriers

Abstract

An information recording and reproduction apparatus uses a recording medium that contains information which prohibits digital copying. A reproduction section reproduces the desired informatiion stored on a first recording medium. A recording section records the reproduced output at a desired position on a second recording medium. However, an erasing section erases the information from the first recording medium during the process of recording that information on the second recording medium. The first and/or second recording medium cannot be removed from the information recording and reproduction apparatus until the erasing operation is completed.

Claims

1. An information recording and reproduction apparatus using a recording medium containing information to prohibit digital copying, comprising:

a reproduction means for reproducing desired information on a first recording medium;

a recording means for recording said desired information reproduced by said reproduction means at a desired position on a second recording medium; and

an erasing means for erasing only said desired information on said first recording medium after the reproduction of said desired information on said first recording medium and the recording of said desired information on said second recording medium are completed, so as to prevent existence of said desired information on both of said first recording medium and said second recording medium.

2. An information recording and reproduction apparatus according to claim 1, wherein said first and second recording medium consist of a main information area including audio and/or video data, and a management information area including information on the position for the recording of each item of main information and information for prohibiting digital copying.

3. An information recording and reproduction apparatus according to claim 1, further comprising a means for prohibiting the discharge of said first recording medium and/or second recording medium from the information recording and reproduction apparatus until the erasing operation by said erasing means has been completed.

4. An information recording and reproduction apparatus according to claim 2, wherein said first and second recording medium are optical disks.

5. An information recording and reproduction apparatus according to claim 2, wherein said erasing means erases the main information on said first recording medium corresponding to the information recorded on said second recording medium from said first recording medium.

6. An information recording and reproduction apparatus according to claim 2, wherein said erasing means erases the management information on said first recording medium corresponding to the information recorded on said second recording medium from said first recording medium.

7. An information recording and reproduction apparatus according to claim 2, wherein said erasing means comprises an updating means for updating the management information recorded on said first and second recording medium according to the information recorded on said second recording medium from said first recording medium.

8. An information recording and reproduction apparatus according to claim 7, wherein said erasing means further comprises a first management information memory for storing the management information on said first recording medium and a second management information memory for storing the management information on said second recording medium, and said updating means updates the contents in each management information memory according to the information recorded on said second recording medium from said first recording medium and then updates the management information on said first and second recording medium.

9. An information recording and reproduction apparatus according to claim 7, wherein said updating means updates the management information on said first and second recording medium after recording of the information on said second recording medium from said first recording medium.

10. An information recording and reproduction apparatus according to claim 7, wherein said updating means updates the management information on said first recording medium before recording on said second recording medium from said first recording medium and updates the management information on said second recording medium after the recording of said information.

11. A method for recording and reproducing information using an information recording and reproducing apparatus, comprising the steps of:

reproducing desired information recorded on a first recording medium;

recording the reproduced desired information at a desired position on a second recording medium; and

erasing only the desired information on the first recording medium after the reproducing step of the desired information on said first recording medium and the recording step of the desired information on said second recording medium are completed, so as to prevent existence of the desired information on both of said first recording medium and said second recording medium.

12. The method according to claim 11, wherein the first and second recording medium have a main information area where audio and/or image information is recorded, and a management information area where a recording position for each item of main information and information for prohibiting digital copying are recorded.

13. The method according to claim 11, further comprising:

prohibiting removal of the first recording medium or second recording medium from the information recording and reproduction apparatus until the erasing step is completed.

14. The method according to claim 12, wherein the erasing step includes:

erasing the main information on the first recording medium that is recorded on the second recording medium.

15. The method according to claim 12, wherein the erasing step includes:

erasing the management information on the first recording medium that is recorded on the second recording medium.

16. The method according to claim 12, further comprising:

updating the management information recorded on the first and second recording mediums to reflect the information recorded on the second recording medium from the first recording medium.