Signal reproducing/recording/transmitting method and apparatus and signal record medium

• US 6,289,103 B1
• Filed: 01/07/2000
• Issued: 09/11/2001
• Est. Priority Date: 07/21/1995
• Status: Expired due to Term

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Sako, Yoichiro, Yoneyama, Shigeyuki
• Primary Examiner(s): Swann, Tod
• Assistant Examiner(s): Smithers, Matthew
• Application Number:
  US09/479,695
• Time in Patent Office: 613 Days
• Field of Search: 380/201, 380/204, 380/213, 380/224
• US Class Current: 380/201
• 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 20/0021 involving encryption or decryption of contents recorded on or reproduced from a record carrier
• CPC Class Codes: G11B 20/00333 the key being stored in header data, e.g. in sector headers
• 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: H04N 2005/91314 the copy protection signal being a pulse signal inserted in blanking intervals of the video signal, e.g. pseudo-AGC pulses, pseudo-sync pulses
• 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 2005/91364 the video signal being scrambled
• CPC Class Codes: H04N 5/913 for scrambling ; for copy protection

Abstract

A signal reproducing apparatus for prohibiting copying or unauthorized use. The apparatus includes a copying management information decision circuit 19 for discriminating the state of the copying management information read out from each header of a data sector and within the TOC, a protect signal generating circuit 20 for generating a protect signal based on the discrimination signal and a mixing circuit 24 for mixing a protect signal in a vertical blanking period of an analog video signal D/A converted from digital video data reproduced from an optical disc D. The apparatus also includes a descrambling circuit 31 for descrambling the digital data based on the copying management information and a scrambling circuit 32 for descrambling the digital data. The apparatus enables prohibition of unauthorized analog copying and digital copying, inhibition of serial generational copying and prohibition of unauthorized analog and digital copying simultaneously.

Claims

1. A method for reproducing digital data from a signal record medium, comprising the steps of:

reading out recording control information from a playback mode control signal area of said signal record medium, said recording control information being operable to control the playback mode of said record medium; and

arraying, based on said recording control information, a combination signal of plural pseudo synchronization pulses and plural white peak signals across plural horizontal periods in a vertical blanking period of an analog video signal generated from said digital data to modify said analog video signal such that proper automatic gain control can not be implemented in a system receiving said analog video signal.

2. The method according to claim 1, wherein said combination signal of plural pseudo synchronization pulses and plural white peak signals is arrayed across five horizontal periods in said vertical blanking period.

3. The method according to claim 1, wherein said combination signal of plural pseudo synchronization pulses and plural white peak signals is arrayed between at least the twelfth and nineteenth horizontal periods in said vertical blanking period.

4. An apparatus for reproducing digital data from a signal recording medium, comprising:

means for reading out recording control information from a playback mode control signal area of said signal recording medium, said recording control information being operable to control the playback mode of said record medium; and

means for arraying, based on said recording control information, a combination signal of plural pseudo synchronization pulses and plural white peak signals across plural horizontal periods in a vertical blanking period of an analog video signal generated from said digital data to modify said analog video signal such that proper automatic gain control can not be implemented in a system receiving said analog video signal.

5. The apparatus according to claim 4, wherein said combination signal of plural pseudo synchronization pulses and plural white peak signals is arrayed across five horizontal periods in said vertical blanking period.

6. The apparatus according to claim 4, wherein said combination signal of plural pseudo synchronization pulses and plural white peak signals is arrayed between at least the twelfth and nineteenth horizontal periods in said vertical blanking period.

7. A method for reproducing a ciphered signal from a signal record medium, comprising the steps of:

reading out recording control information arrayed at a playback mode control signal area of said signal record medium;

deciphering said ciphered signal using at least a portion of said recording control information as key information for reproducing said signal to generate an analog video signal; and

arraying a combination signal of plural pseudo synchronization pulses and plural white peak signals across plural horizontal periods in a vertical blanking period of said analog video signal using at least a portion of said recording control information as key information, said arraying of said combination signal modifying said analog video signal such that proper automatic gain control can not be implemented in a system receiving said analog video signal.

8. The method according to claim 7, wherein said combination signal of plural pseudo synchronization pulses and plural white peak signals is arrayed across five horizontal periods in said vertical blanking period.

9. The method according to claim 7, wherein said combination signal of plural pseudo synchronization pulses and plural white peak signals is arrayed between at least the twelfth and nineteenth horizontal periods in said vertical blanking period.

10. A signal reproducing apparatus for reproducing a ciphered signal from a signal record medium, comprising:

readout means for reading out recording control information arrayed at a playback mode control signal area of said signal record medium, said recording control information being operable to control the playback mode of said record medium;

deciphering means for deciphering said ciphered signal using at least a portion of said recording control information as key information to generate an analog video signal; and

arraying means for arraying a combination signal of plural pseudo synchronization pulses and plural white peak signals over plural horizontal periods within a vertical blanking period of the analog video signal using at least a portion of said recording control information as key information, said arraying of said combination signal modifying said analog video signal such that proper automatic gain control can not be implemented in a system receiving said analog video signal.

11. The apparatus according to claim 10, wherein said combination signal of plural pseudo synchronization pulses and plural white peak signals is arrayed across five horizontal periods in said vertical blanking period.

12. The apparatus according to claim 10, wherein said combination signal of plural pseudo synchronization pulses and plural white peak signals is arrayed between at least the twelfth and nineteenth horizontal periods in said vertical blanking period.

13. A method for receiving and reproducing transmitted digital data, comprising the steps of:

generating transmission control information from the received digital data; and

arraying, based on said transmission control information, a combination signal of plural pseudo synchronization pulses and plural white peak signals across plural horizontal periods in a vertical blanking period of an analog video signal generated from said digital data to modify said analog video signal such that proper automatic gain control can not be implemented in a system receiving said analog video signal.

14. The method according to claim 13, wherein said combination signal of plural pseudo synchronization pulses and plural white peak signals is arrayed across five horizontal periods in said vertical blanking period.

15. The method according to claim 13, wherein said combination signal of plural pseudo synchronization pulses and plural white peak signals is arrayed between at least the twelfth and nineteenth horizontal periods in said vertical blanking period.

16. An apparatus for receiving and reproducing transmitted digital data, comprising:

means for generating transmission control information from the received digital data;

means for arraying, based on said transmission control information, a combination signal of plural pseudo synchronization pulses and plural white peak signals across plural horizontal periods in a vertical blanking period of an analog video signal generated from said digital data to modify said analog video signal such that proper automatic gain control can not be implemented in a system receiving said analog video signal; and

means for performing a pre-set conversion operation on said digital data based on said transmission control information.

17. The apparatus according to claim 16, wherein said combination signal of plural pseudo synchronization pulses and plural white peak signals is arrayed across five horizontal periods in said vertical blanking period.

18. The apparatus according to claim 16, wherein said combination signal of plural pseudo synchronization pulses and plural white peak signals is arrayed between at least the twelfth and nineteenth horizontal periods in said vertical blanking period.

19. A video signal reproducing apparatus for reproducing a digital disc medium having recorded thereon a digital video signal and a recording control code for outputting at least an analog video signal, wherein said recording control code is arrayed in a playback mode control signal area of said disc, comprising:

detection means for detecting the state of the recording control code;

means for generating a recording control signal;

D/A conversion means for converting the digital video signal reproduced from the digital disc medium into an analog video signal;

annexing means responsive to said recording control signal to array a combination signal of plural pseudo synchronization pulses and plural white peak signals across plural horizontal periods in a vertical blanking period of said analog video signal to modify said analog video signal such that proper automatic gain control can not be implemented in a system receiving said analog video signal; and

outputting means for outputting said analog video signal.

20. The apparatus according to claim 19, wherein said combination signal of plural pseudo synchronization pulses and plural white peak signals is arrayed across five horizontal periods in said vertical blanking period.

21. The apparatus according to claim 19, wherein said combination signal of plural pseudo synchronization pulses and plural white peak signals is arrayed between at least the twelfth and nineteenth horizontal periods in said vertical blanking period.

22. The video signal reproducing apparatus as claimed in claim 19, wherein said annexing means is further operable to change the phase of at least a portion of a color burst signal associated with said analog video signal.

23. The video signal reproducing apparatus as claimed in claim 19, wherein said annexing means is further operable to array plural bits in a predetermined horizontal period within said vertical blanking period.

24. The video signal reproducing apparatus as claimed in claim 23, wherein said plural bits include a generation limitation indicating a limit on the number of generations of recording permitted.

25. A method for reproducing a digital disc medium having recorded thereon a digital video signal and a recording control code for outputting at least an analog video signal, wherein said recording control code is arrayed in a playback mode control signal area of said disc, comprising the steps of:

detecting the state of the recording control code;

generating a recording control signal;

converting the digital video signal reproduced from the digital disc medium into an analog video signal;

responding to said recording control signal by arraying a combination signal of plural pseudo synchronization pulses and plural white peak signals across plural horizontal periods in a vertical blanking period of said analog video signal to modify said analog video signal such that proper automatic gain control can not be implemented in a system receiving said analog video signal; and

outputting said analog video signal having annexed thereto said recording control signal.

26. The method according to claim 25, wherein said combination signal of plural pseudo synchronization pulses and plural white peak signals is arrayed across five horizontal periods in said vertical blanking period.

27. The method according to claim 25, wherein said combination signal of plural pseudo synchronization pulses and plural white peak signals is arrayed between at least the twelfth and nineteenth horizontal periods in said vertical blanking period.

28. The video signal reproducing method as claimed in claim 25, further comprising the step of changing the phase of at least a portion of a color burst signal associated with said analog video signal.

29. The video signal reproducing method as claimed in claim 25, further comprising the step of arraying plural bits in a predetermined horizontal period within said vertical blanking period.

30. The video signal reproducing method as claimed in claim 29, wherein said plural bits include a generation limitation indicating a limit on the number of generations of recording permitted.

31. A combination apparatus of a video signal reproducing apparatus and a recording apparatus for reproducing a digital disc medium having recorded thereon a digitized video signal and a video recording control code, said combination apparatus reproducing at least an analog video signal, outputting at least the analog video signal and recording the outputted signal, wherein said video recording control code is arrayed in a playback mode control signal area of said disc, said combination apparatus comprising:

detection means for detecting the state of the recording control code arrayed in said playback mode control signal area;

means for generating a recording control signal based on a detection output of said detection means;

D/A conversion means for converting the digital video signal reproduced from the digital disc medium into an analog video signal;

annexing means responsive to said recording control signal to array a combination signal of plural pseudo synchronization pulses and plural white peak signals across plural horizontal periods in a vertical blanking period of said analog video signal to modify said analog video signal such that proper automatic gain control can not be implemented in a system receiving said analog video signal;

outputting means for outputting said analog video signal;

inputting means for inputting said analog video signal from said outputting means to said recording apparatus;

automatic amplitude adjustment means responsive to said recording control signal; and

recording means for recording said amplitude adjusted analog video signal on an analog video record medium.

32. A combination apparatus of a video signal reproducing apparatus and a recording apparatus for reproducing a digital disc medium having recorded thereon a digitized video signal and a video recording control code, said combination apparatus reproducing at least an analog video signal and recording the outputted signal, wherein said video recording control code is arrayed in a playback mode control signal area of said disc, said combination apparatus comprising:

detection means for detecting the state of the recording control code;

means for generating a recording control based on a detection output of said detection means;

D/A conversion means for converting the digital video signal reproduced from the digital disc medium into an analog video signal;

annexing means responsive to said recording control signal to array a combination signal of plural pseudo synchronization pulses and plural white peak signals across plural horizontal periods in a vertical blanking period of said analog video signal to modify said analog video signal such that proper automatic gain control can not be implemented in a system receiving said analog video signal;

outputting means for outputting said analog video signal;

inputting means for inputting said analog video signal;

video recording inhibiting means responsive to said recording control signal; and

recording means for recording said input analog video signal on a record medium;

wherein said recording may be analog or digital.

33. The combination apparatus of the video signal reproducing apparatus and the recording apparatus as claimed in claim 32, wherein said video recording inhibiting means enables a video recording state depending on a generation indicator of said recording control signal.

34. A combination method of a video signal reproducing method and a recording method for reproducing a digital disc medium having recorded thereon a digitized video signal and a video recording control code, said combination method including reproducing at least an analog video signal and recording the outputted signal, wherein said video recording control code is arrayed in a playback mode control signal area of said disc, said combination method comprising the steps of:

detecting the state of the recording control code;

generating a video recording control signal based on a detection output;

converting the digital video signal reproduced from the digital disc medium into an analog video signal;

arraying a combination signal of plural pseudo synchronization pulses and plural white peak signals across plural horizontal periods in a vertical blanking period of said analog video signal to modify said analog video signal such that proper automatic gain control can not be implemented in a system receiving said analog video signal;

outputting said analog video signal;

inputting said outputted analog video signal;

effecting automatic amplitude adjustment in in said analog video signal; and

recording said amplitude adjusted analog video signal on an analog video record medium.

35. A method for reproducing digital data from a signal record medium, comprising the steps of:

reading out recording control information from a playback mode control signal area of said signal record medium, said recording control information being operable to control the playback mode of said record medium; and

arraying, based on said recording control information, at least plural white peak signals across plural horizontal periods in a vertical blanking period of an analog video signal generated from said digital data to modify said analog video signal such that proper automatic gain control can not be implemented in a system receiving said analog video signal.

36. The method according to claim 35, wherein said plural white peak signals are arrayed across at least five horizontal periods in said vertical blanking period.

37. A method for reproducing digital data from a signal record medium, comprising the steps of:

reading out recording control information from a playback mode control signal area of said signal record medium, said recording control information being operable to control the playback mode of said record medium; and

arraying, based on said recording control information, at least plural pseudo synchronization pulses in a vertical blanking period of an analog video signal generated from said digital data to modify said analog video signal such that proper automatic gain control can not be implemented in a system receiving said analog video signal.

38. The method according to claim 37, wherein said plural pseudo synchronization pulses are arrayed across at least five horizontal periods in said vertical blanking period.

39. A method for receiving and reproducing transmitted digital data, comprising the steps of:

generating transmission control information from the received digital data; and

arraying, based on said transmission control information, at least plural white peak signals across plural horizontal periods in a vertical blanking period of an analog video signal generated from said digital data to modify said analog video signal such that proper automatic gain control can not be implemented in a system receiving said analog video signal.

40. The method according to claim 39, wherein said plural white peak signals are arrayed across at least five horizontal periods in said vertical blanking period.

41. A method for receiving and reproducing transmitted digital data, comprising the steps of:

generating transmission control information from the received digital data; and

arraying, based on said transmission control information, at least plural pseudo synchronization pulses across plural horizontal periods in a vertical blanking period of an analog video signal generated from said digital data to modify said analog video signal such that proper automatic gain control can not be implemented in a system receiving said analog video signal.

42. The method according to claim 41, wherein said plural pseudo synchronization pulses are arrayed across five horizontal periods in said vertical blanking period.

43. A method for reproducing digital data from a signal record medium, comprising the steps of:

reading out recording control information from a playback mode control signal area of said signal record medium, said recording control information being operable to control the playback mode of said record medium;

arraying, based on said recording control information, at least plural white peak signals across plural horizontal periods in a vertical blanking period of an analog video signal generated from said digital data to modify said analog video signal such that proper automatic gain control can not be implemented in a system receiving said analog video signal; and

changing the phase of at least a portion of a color burst signal associated with said analog video signal.

44. The method according to claim 43, wherein said white peak signals are arrayed at lines 1 to 17 and 273 to 280 of said vertical blanking period of said analog video signal.

45. A method for reproducing digital data from a signal record medium, comprising the steps of:

reading out recording control information from a playback mode control signal area of said signal record medium, said recording control information being operable to control the playback mode of said record medium;

arraying, based on said recording control information, at least plural pseudo synchronization pulses in a vertical blanking period of an analog video signal generated from said digital data to modify said analog video signal such that proper automatic gain control can not be implemented in a system receiving said analog video signal; and

changing the phase of at least a portion of a color burst signal associated with said analog video signal.

46. The method according to claim 45, wherein said pseudo synchronization pulses are arrayed at lines 1 to 17 and 273 to 280 of said vertical blanking period of said analog video signal.

47. A method for receiving and reproducing transmitted digital data, comprising the steps of:

generating transmission control information from the received digital data;

arraying, based on said transmission control information, at least plural white peak signals across plural horizontal periods in a vertical blanking period of an analog video signal generated from said digital data to modify said analog video signal such that proper automatic gain control can not be implemented in a system receiving said analog video signal; and

changing the phase of at least a portion of a color burst signal associated with said analog video signal.

48. The method according to claim 47, wherein said white peak signals are arrayed at lines 1 to 17 and 273 to 280 of said vertical blanking period of said analog video signal.

49. A method for receiving and reproducing transmitted digital data, comprising the steps of:

generating transmission control information from the received digital data;

arraying, based on said transmission control information, at least plural pseudo synchronization pulses across plural horizontal periods in a vertical blanking period of an analog video signal generated from said digital data to modify said analog video signal such that proper automatic gain control can not be implemented in a system receiving said analog video signal; and

changing the phase of at least a portion of a color burst signal associated with said analog video signal.

50. The method according to claim 49, wherein said pseudo synchronization pulses are arrayed at lines 1 to 17 and 273 to 280 of said vertical blanking period of said analog video signal.

51. A method for receiving and reproducing transmitted digital data, comprising the steps of:

generating transmission control information from the received digital data;

arraying, based on said transmission control information, a combination signal of plural pseudo synchronization pulses and plural white peak signals across plural horizontal periods in a vertical blanking period of an analog video signal generated from said digital data to modify said analog video signal such that proper automatic gain control can not be implemented in a system receiving said analog video signal; and

changing the phase of at least a portion of a color burst signal associated with said analog video signal.

52. The method according to claim 51, wherein said combination signal of plural pseudo synchronization pulses and plural white peak signals is arrayed at lines 1 to 17 and 273 to 280 of said vertical blanking period of said analog video signal.

53. An apparatus for receiving and reproducing transmitted digital data, comprising:

means for generating transmission control information from the received digital data;

means for arraying, based on said transmission control information, a combination signal of plural pseudo synchronization pulses and plural white peak signals across plural horizontal periods in a vertical blanking period of an analog video signal generated from said digital data to modify said analog video signal such that proper automatic gain control can not be implemented in a system receiving said analog video signal;

means for changing the phase of at least a portion of a color burst signal associated with said analog video signal; and

means for performing a pre-set conversion operation on said digital data based on said transmission control information.

54. The apparatus according to claim 53, wherein said combination signal of plural pseudo synchronization pulses and plural white peak signals is arrayed at lines 1 to 17 and 273 to 280 of said vertical blanking period of said analog video signal.

55. An apparatus for reproducing digital data from a signal recording medium, comprising:

means for reading out recording control information from a playback mode control signal area of said signal recording medium, said recording control information being operable to control the playback mode of said record medium;

means for arraying, based on said recording control information, a combination signal of plural pseudo synchronization pulses and plural white peak signals across plural horizontal periods in a vertical blanking period of an analog video signal generated from said digital data to modify said analog video signal such that proper automatic gain control can not be implemented in a system receiving said analog video signal; and

means for changing the phase of at least a portion of a color burst signal associated with said analog video signal.

56. The apparatus according to claim 55, wherein said combination signal of plural pseudo synchronization pulses and plural white peak signals is arrayed at lines 1 to 17 and 273 to 280 of said vertical blanking period of said analog video signal.