Information signal output control method, information signal duplication prevention method, information signal duplication prevention device, and information signal recording medium

• US 20010010756A1
• Filed: 03/30/2001
• Published: 08/02/2001
• Est. Priority Date: 01/23/1997
• Status: Abandoned Application

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Ogino, Akira
• Application Number:
  US09/820,957
• Publication Number:
  US 20010010756A1
• Time in Patent Office: Days
• US Class Current: 386/94
• 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 20/00768 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 20/00913 based on a spread spectrum technique
• CPC Class Codes: H04N 2005/91321 the copy protection signal being a copy protection control signal, e.g. a record inhibit signal
• CPC Class Codes: H04N 2005/91328 the copy protection signal being a copy management signal, e.g. a copy generation management signal [CGMS]
• CPC Class Codes: H04N 2005/9135 by superimposing the spectrally spread copy protection signal onto the video signal
• CPC Class Codes: H04N 2005/91371 the video color burst signal being modified
• CPC Class Codes: H04N 5/913 for scrambling ; for copy protection

Abstract

If only any one of a pair of an SS anti-duplication control signal S5 and copy guard signal S6 generated correlatively each other added on the video signal played back from the disk is detected, or if the specific anti-duplication control signal is not detected, the video signal recorded in the disk is judged to be an illegally duplicated video signal, and the output control signal generation section controls the output control section so as not to output the playback video signal S4.

Claims

1. An information signal output control method, a plurality of anti-duplication control signals of different types generated correlatively each other added on said information signal being detected, and output control of said information signal being performed dependently on detection condition of said plurality of anti-duplication control signals of different types.

2. An information signal output control method as claimed in

claim 1

, wherein notice information is outputted if a specific anti-duplication control signal out of said plurality of anti-duplication control signals of different types generated correlatively each other added on said information signal is missed and playback output of said information signal is not outputted.

3. An information signal output control method as claimed in

claim 1

, wherein one of said plurality of anti-duplication control signals of different types generated correlatively each other is a spectrally spread anti-duplication control signal superimposed on said information signal.

4. An information signal duplication prevention method in which when an information signal is duplicated, said information signal on which a plurality of anti-duplication control signals of different types generated correlatively each other is added is duplicated.

5. An information signal duplication prevention method as claimed in

claim 4

, wherein one of said plurality of anti-duplication control signals of different types generated correlatively each other is a spectrally spread anti-duplication control signal superimposed on said information signal.

6. An information signal duplication prevention method as claimed in

claim 4

, wherein when said plurality of anti-duplication control signals of different types added on said information signal is detected, at least any one of said plurality of anti-duplication control signals of different types added on said information signal is missed, a notice information is outputted.

7. An information signal output device comprising:

anti-duplication control signal detection means for detecting a plurality of anti-duplication control signals of different types generated correlatively each other added on the information signal, and

control means for performing output control of said information signal dependently on detection condition of said plurality of anti-duplication control signals of different types in said anti-duplication control signal detection means.

8. An information signal output device as claimed in

claim 7

, wherein said information signal output device is provided with a notice information generation means, and if a detection result of said anti-duplication control signal detection means indicates that a specific anti-duplication control signal out of said plurality of anti-duplication control signals of different types is missed and playback output of said information signal is controlled so as not to be outputted in compliance with control performed by means of said control means, a notice information generated by means of said notice information generation means is outputted.

9. An information signal output device as claimed in

claim 7

, wherein one of said plurality of anti-duplication control signals of different types generated correlatively each other is a spectrally spread anti-duplication control signal added on said information signal.

10. An information signal recording device comprising:

first anti-duplication control signal generation means for generating an anti-duplication control signal,

second anti-duplication control signal generation means for generating one or more anti-duplication control signals of different types correlatively generated with the first anti-duplication control signal generated by said first anti-duplication control signal generation means, and

recording means for recording an information signal on which said first anti-duplication control signal generated by said first anti-duplication control signal generation means and the second anti-duplication control signal generated by said second anti-duplication control signal are added in a recording medium.

11. An information signal recording device as claimed in

claim 10

, wherein said information signal recording device is provided with;

anti-duplication control signal detection means for detecting the plurality of anti-duplication control signals of different types added on an information signal, and

recording control means for performing recording control of said information signal based on said anti-duplication control signal detected by said anti-duplication control signal detection means.

12. An information signal recording device as claimed in

claim 11

, wherein said information signal recording device is provided with a notice information generation means, and if a detection result of said anti-duplication control signal detection means indicates that a specific anti-duplication control signal out of said plurality of anti-duplication control signals of different types is missed and said information signal is not outputted, a notice information generated by means of said notice information generation means is outputted.

13. An information signal recording device as claimed in

claim 10

, wherein one of the plurality of anti-duplication control signals added on said information signal recorded in said recording medium by said recording means is a spectrally spread anti-duplication control signal.

14. An information signal recording medium in which an information signal containing a plurality of anti-duplication control signals of different types generated correlatively each other added thereon is recorded.

15. An information signal recording medium as claimed in

claim 14

, wherein one of the plurality of anti-duplication control signals added on said information signal recorded in said recording medium by said recording means is a spectrally spread anti-duplication control signal.