Method and device for controlling information signal recording

• US 6,430,291 B1
• Filed: 02/27/1998
• Issued: 08/06/2002
• Est. Priority Date: 03/06/1997
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Ikeda, Nozomu, Ogino, Akira
• Primary Examiner(s): Barron, Gilberto
• Assistant Examiner(s): JACK, TODD M
• Application Number:
  US09/031,687
• Time in Patent Office: 1,621 Days
• Field of Search: 380/203, 380/253, 360/60, 369/47, 386/94
• US Class Current: 380/203
• 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 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 20/00688 said measures preventing that a usable copy of recorded data can be made on another medium

Abstract

An anti-duplication control signal detection section detects an anti-duplication control signal added on a video signal S1 and supplies it to a system controller as a duplication prevention control information S2. A write control section of the system controller stops the duplication of the video signal in a disk if the anti-duplication control information is an information which indicates duplication inhibition. In this case, the video signal recorded in the disk is erased under the control from the erasing control section by the time the duplication prevention control corresponding to the anti-duplication control signal becomes active.

Claims

1. An information signal recording control method for controlling recording of an information signal in a recording medium according to a content of an anti-duplication control signal added on said information signal, comprising the steps:

detecting said anti-duplication control signal added on said information signal and judging said content thereof;

stopping said recording of said information signal in said recording medium when said content of said detected anti-duplication control signal is judged to be duplication-inhibited;

erasing from said recording medium said information signal that was recorded between a time when said recording of said information signal is started and a time when said recording of said information signal is stopped because said anti-duplication control signal was judged to be duplication-inhibited; and

storing a recording region information including a starting point and an ending point of said recording, wherein said recorded information signal is erased based on said recording region information, and said recorded information is one of physically erased and logically erased from said recording medium.

2. The information signal recording method as claimed in claim 1, wherein all information signals that are present in said recording medium are erased when said recording of said information signal in said recording medium is brought to a stop.

5. The information signal recording method as claimed in claim 1, wherein the anti-duplication control signal indicates one of duplication permission, an uncertain condition, and a duplication-inhibited condition for controlling duplication of said information signal.

6. The information signal recording method as claimed in claim 5, wherein said information signal is erased in the uncertain condition and in the duplication-inhibited condition when the anti-duplication control signal changes from the uncertain condition to the anti-duplication condition.

7. The information signal recording method as claimed in claim 1, further comprising the step of storing erasing completion information in a memory after said step of erasing from said recording medium is completed.

8. The information signal recording method as claimed in claim 1, wherein said starting point and ending point are stored in a memory separated from said recording medium.

9. The information signal recording method as claimed in claim 1, wherein said starting point and ending point are stored in said recording medium.

10. The information signal recording method as claimed in claim 1 wherein an information signal recorded on said recording medium before a present recording of an information signal is erased when said recording of said information signal in said recording medium is brought to a stop in said step of stopping.

3. An information signal recording control device for controlling recording of an information signal in a recording medium according to a content of an anti-duplication control signal added on an information signal, comprising:

anti-duplication control signal detection means for detecting said anti-duplication control signal added on said information signal and judging said content thereof;

recording control means for stopping said recording of said information signal in said recording medium when said content of said detected anti-duplication control signal is judged to be duplication-inhibited;

erasing means for erasing from said recording medium said information signal that was recorded between a time when said recording of said information signal is started and a time when said recording of said information signal is stopped because said anti-duplication control signal was judged to be duplication-inhibited; and

memory means for storing a recording region information including a starting point and an ending point of said recording in said recording medium where said information signal is recorded, wherein said recorded information signal is erased based on said recording region information, and said recorded information is one of physically erased and logically erased from said recording medium.

4. The information signal recording control device as claimed in claim 3, wherein said erasing means erases all information in said recording medium when said recording of said information signal in said recording medium is brought to a stop.

11. The information signal recording control device as claimed in claim 3, wherein the anti-duplication control signal indicates one of duplication permission, an uncertain condition, and a duplication-inhibited condition for controlling duplication of said information signal.

12. The information signal recording control device as claimed in claim 11, wherein said information signal is erased in the uncertain condition and in the duplication-inhibited condition when the anti-duplication control signal changes from the uncertain condition to the anti-duplication condition.

13. The information signal recording control device as claimed in claim 3, further comprising the storage means for storing erasing completion information in a memory after said erasing means completes the erasing from said recording medium.

14. The information signal recording control device as claimed in claim 3, further comprising a memory separated from said recording medium for storing said starting point and ending point.

15. The information signal recording control device as claimed in claim 3, wherein said starting point and ending point are stored in said recording medium.

16. The information signal recording method as claimed in claim 3 wherein an information signal recorded on said recording medium before a present recording process is erased when said recording of said information signal in said recording medium is brought to a stop by said recording control means.