Controlled-access broadcast signal receiving system

• US 5,796,828 A
• Filed: 07/07/1995
• Issued: 08/18/1998
• Est. Priority Date: 07/08/1994
• Status: Expired

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Goto, Koichi, Tsukamoto, Junichi, Fukushima, Shinichi
• Primary Examiner(s): Gregory, Bernarr E.
• Application Number:
  US08/499,332
• Time in Patent Office: 1,138 Days
• Field of Search: 380/4, 380/5, 380/9, 380/10, 380/23, 380/25, 380/49, 380/50
• US Class Current: 380/203
• 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 20/00224 wherein the key is obtained from a remote server
• CPC Class Codes: G11B 20/00246 wherein the key is obtained from a local device, e.g. device key initially stored by the player or by the recorder
• CPC Class Codes: G11B 20/00478 wherein contents are decrypted and re-encrypted with a different key when being copied from/to a record carrier
• CPC Class Codes: G11B 20/00746 wherein the usage restriction can be expressed as a specific number
• 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 2005/91364 the video signal being scrambled
• CPC Class Codes: H04N 21/2543 Billing , e.g. for subscription services payment schemes, architectures or protocols G06Q20/00; e-commerce G06Q30/00; arrangements for billing for the use of broadcast information or broadcast-related information H04H60/21
• CPC Class Codes: H04N 21/4334 Recording operations recording of a television signal H04N5/76; arrangements for recording or accumulating broadcast information or broadcast-related information H04H60/27
• CPC Class Codes: H04N 21/4405 involving video stream decryption
• CPC Class Codes: H04N 21/4408 involving video stream encryption, e.g. re-encrypting a decrypted video stream for redistribution in a home network
• CPC Class Codes: H04N 21/47202 for requesting content on demand, e.g. video on demand
• CPC Class Codes: H04N 21/8355 involving usage data, e.g. number of copies or viewings allowed
• CPC Class Codes: H04N 5/76 Television signal recording
• CPC Class Codes: H04N 5/913 for scrambling ; for copy protection
• CPC Class Codes: H04N 7/163 by receiver means only
• CPC Class Codes: H04N 7/1675 Providing digital key or authorisation information for generation or regeneration of the scrambling sequence pseudo-random number generators in general G06F7/58
• CPC Class Codes: H04N 9/8042 involving data reduction
• CPC Class Codes: H04N 9/8205 : involving the multiplexing of an additional signal and the colour video signal

Abstract

An apparatus and method for transferring from a broadcaster to a receiver a limited reproduction right in data. A signal indicating the limited reproduction right is transmitted by the broadcaster and stored by the receiver with the data. The receiver reproduces and processes the data as a function of this signal.

Claims

1. Apparatus for receiving, recording, and reproducing data signals, comprising:

receiving means for receiving said data signals and an access-control signal generated by a remote provider which grants users rights to reproduce said data signals;

processing means, coupled to said receiving means, for processing said data signals to produce processed data signals;

control means for controlling said processing means in response to said access-control signal;

storage means for storing said processed data signals and for storing said access-control signal;

means for reproducing said stored processed data signals to produce reproduced data signals and for retrieving said stored access-control signal; and

reprocessing means coupled to said control means for reprocessing said reproduced data signals in response to said retrieved access-control signal.

2. Apparatus according to claim 1 wherein said data signals are digital video data signals.

3. Apparatus according to claim 1 wherein said receiving means receives said data signals and said access-control signal from a broadcasting station.

4. Apparatus according to claim 1 wherein said receiving means further comprises a tuner for receiving broadcast signals.

5. Apparatus according to claim 4 wherein said receiving means further comprises a modem for receiving said access-control signal.

6. Apparatus according to claim 1 wherein said receiving means further comprises a modem for receiving said access-control signal.

7. Apparatus according to claim 1 wherein said receiving means further comprises a user interface for receiving said access-control signal from a user.

8. Apparatus according to claim 1 wherein said processing means comprises a descrambler.

9. Apparatus according to claim 1 wherein said processing means comprises a descrambler and an encipherer and wherein said reprocessing means comprises a decipherer.

10. Apparatus according to claim 1 wherein said processing means comprises an encipherer and wherein said reprocessing means comprises a decipherer.

11. Apparatus according to claim 1 wherein said processed data signals are stored on a record medium and said access-control signal is stored in a separate storage medium.

12. Apparatus according to claim 11 wherein said record medium is a video tape.

13. Apparatus according to claim 11 wherein said separate storage medium is an integrated circuit memory.

14. Apparatus according to claim 1 wherein said processed data signals and said access-control signal both are stored on a common record medium.

15. Apparatus according to claim 1 further comprising a clock, coupled to said receiving means and to said control means, for supplying a clock signal to said control means;

wherein said data signals include a clock reference signal; and

wherein said clock signal is synchronized with said clock reference signal.

16. Apparatus according to claim 1 further comprising a decoder, coupled to said reprocessing means, for decoding said reprocessed data signals.

17. Apparatus for receiving and recording data signals, comprising:

receiving means for receiving said data signals and an access-control signal generated by a remote provider which grants users rights to reproduce said data signals;

processing means, coupled to said receiving means, for processing said data signals to produce processed data signals;

control means for controlling said processing means in response to said access-control signal; and

storage means for storing said processed data signals and said access-control signal.

18. Apparatus according to claim 17 wherein said processing means comprises a descrambler.

19. Apparatus according to claim 18 wherein said processing means further comprises an encipherer.

20. Apparatus according to claim 17 wherein said processing means comprises an encipherer.

21. Apparatus according to claim 17 wherein said storage means comprises a storage cassette.

22. Apparatus according to claim 21 wherein said storage cassette contains a record medium on which said processed data signals are recorded and an integrated circuit memory in which said access-control signal is stored.

23. Apparatus for reproducing processed data signals, comprising:

means for reproducing stored processed data signals to produce reproduced data signals and for retrieving a stored access-control signal generated by a remote provider which grants users rights to reproduce said data signals;

reprocessing means for reprocessing said reproduced data signals to produce reprocessed data signals; and

control means for controlling said reprocessing means in response to said retrieved access-control signal.

24. Apparatus according to claim 23 wherein said reprocessing means comprises a descrambler.

25. Apparatus according to claim 23 wherein said reprocessing means comprises a decipherer.

26. Apparatus according to claim 23 wherein said processed data signals and said access-control signals are stored in a storage cassette.

27. A method for transferring from a broadcaster to a receiver a limited reproduction right in data, comprising the steps of:

transmitting from said broadcaster to said receiver an access-control signal generated by a remote provider and said data, said access-control signal indicating said limited reproduction right;

receiving, at said receiver, said access-control signal and said data;

processing, at said receiver, said data in response to said access-control signal to produce processed data;

storing, at said receiver, said processed data and said access-control signal;

retrieving, at said receiver, said stored access-control signal;

reproducing, at said receiver, said stored processed data to produce reproduced data; and

reprocessing, at said receiver, said reproduced data in response to said retrieved access-control signal.

28. The method, according to claim 27, wherein said limited reproduction right is the right to reproduce said data N times.

29. The method, according to claim 27, wherein said limited reproduction right is the right to reproduce said data until date Y.

30. The method, according to claim 27, wherein said limited reproduction right is the right to reproduce said data until time T.

31. The method, according to claim 27, wherein said data is transmitted in scrambled form and said step of processing said data comprises descrambling said data.

32. The method, according to claim 31, wherein said step of processing said data further comprises enciphering said data;

and

wherein said step of reprocessing said reproduced data comprises deciphering said reproduced data.

33. The method, according to claim 27, wherein said step of processing said data comprises enciphering said data;

and

wherein said step of reprocessing said reproduced data comprises deciphering said reproduced data.

34. The method, according to claim 27, wherein said data is transmitted and stored in scrambled form, and said step of reprocessing said reproduced data comprises descrambling said reproduced data.

35. The method, according to claim 27, wherein said processed data and said access-control signal are stored on a storage cassette.

36. A method for transferring from a broadcaster to a receiver a limited reproduction right in prerecorded data, comprising the steps of:

transmitting from said broadcaster to said receiver an access-control signal generated by a remote provider, said access-control signal indicating said limited reproduction right;

receiving, at said receiver, said access-control signal;

reproducing, at said receiver, said prerecorded data; and

processing, at said receiver, said reproduced data in response to said access-control signal.

37. The method, according to claim 36, wherein said step of processing said reproduced data comprises deciphering said reproduced data.

38. The method, according to claim 36, wherein said step of processing said reproduced data comprises descrambling said reproduced data.

39. A method for reproducing prerecorded data comprising the steps of:

reproducing an access-control signal generated by a remote provider which grants users rights to reproduce said data signals from a first storage medium;

reproducing processed data from a second storage medium in response to said access-control signal to produce reproduced data; and

reprocessing said reproduced data in response to said access-control signal.

40. A method for erasing prerecorded data stored on a record medium in response to an access-control signal stored in a separate memory, comprising the steps of:

retrieving said access-control signal from said separate memory;

determining that said access-control signal is an ERASE signal; and

erasing data stored on said record medium in response to said ERASE signal.