Method and apparatus for storing scrambled digital programs by filtering product identifier

• US 7,010,685 B1
• Filed: 11/09/1999
• Issued: 03/07/2006
• Est. Priority Date: 11/09/1999
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.), Sony Electronics Inc. (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.), Sony Electronics Inc. (Sony Group Corp.)
• Inventors: Candelore, Brant L.
• Primary Examiner(s): Moise, Emmanuel L.
• Assistant Examiner(s): Fields, Courtney D.
• Application Number:
  US09/437,345
• Time in Patent Office: 2,310 Days
• Field of Search: 713/154, 713/201, 713/164, 713/200, 380/200, 380/201, 380/210, 380/239, 380/277, 380/242, 380/280, 380/281
• US Class Current: 713/164
• CPC Class Codes: H04K 1/00 Secret communication
• CPC Class Codes: H04N 21/235 Processing of additional data, e.g. scrambling of additional data or processing content descriptors
• CPC Class Codes: H04N 21/4147 PVR [Personal Video Recorder] H04N5/76 takes precedence ; arrangements for broadcast with accumulation-type receivers H04H20/40
• CPC Class Codes: H04N 21/4348 Demultiplexing of additional data and video streams
• CPC Class Codes: H04N 21/435 Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
• 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 21/4623 Processing of entitlement messages, e.g. ECM [Entitlement Control Message] or EMM [Entitlement Management Message] arrangements for conditional access to broadcast information or to broadcast-related services H04H60/14
• CPC Class Codes: H04N 21/4627 Rights management associated to the content security in data switching network management H04L41/28; security management or policies for network security H04L63/20; access security in wireless networks H04W12/08
• CPC Class Codes: H04N 21/63345 by transmitting keys key distribution for secret or secure communication H04L9/08; network support of key management H04L63/06
• CPC Class Codes: H04N 21/8355 involving usage data, e.g. number of copies or viewings allowed
• 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

Abstract

In accordance with one embodiment, a method for storing a normal scrambled digital program is provided. The method includes receiving a scrambled program, and receiving a plurality of access requirements. Each access requirement can descramble the scrambled program. The method also includes selecting at least one of the access requirements, and storing the scrambled program and the selected requirement.

Claims

1. A copy management method for controlling the recording and reproduction of digital content comprising:

receiving a digital bitstream including program data, said program data including system information and said digital content in a scrambled format;

descrambling said digital content in a scrambled format to provide a first output including said digital content in a descrambled format, said descrambling being carried out in a first conditional access unit;

re-scrambling said digital content in a descrambled format to provide a second output including said digital content in a re-scrambled format, said re-scrambling being carried out in a second conditional access unit; and

outputting said first output including said digital content in a descrambled format and a second output including said digital content in a re-scrambled format.

2. The copy management method of claim 1, further comprising receiving and recording said digital content of said second output in a scrambled format.

3. The copy management method of claim 1, further comprising:

demultiplexing said digital content from said program data; and

decompressing said digital content in a descrambled format to a decompressed state.

4. The copy management method of claim 1, wherein said second conditional access unit is different than said first conditional access unit and implemented with a single digital receiver.

5. The copy management method of claim 1, wherein said digital content is content contained in digital television transmissions.

6. The copy management method of claim 1, wherein said digital content is content downloaded from the Internet.

7. The copy management method of claim 1, wherein said descrambling and re-scrambling steps are carried out in a first conditional access unit.

8. The copy management system of claim 1 further comprising:

receiving a plurality of access requirements;

selecting at least one of the access requirements; and

storing said scrambled program data along with said selected at least one access requirement.

9. The copy management system of claim 1, wherein said descrambling comprises:

extracting a descrambling key included in said program data; and

applying said descrambling key to said digital content in a scrambled format to provide said digital content in a descrambled format.

10. The copy management system of claim 1, wherein said descrambling of said digital content being conducted using a key also used to re-scramble said digital content.

11. A copy management system for controlling the recording and reproduction of digital content comprising:

means for receiving a digital bitstream including program data, said program data including system information and said digital content in a scrambled format;

means for descrambling said digital content in a scrambled format to provide a first output including said digital content in a descrambled format, said means for descrambling being deployed in a first conditional access unit;

means for re-scrambling said digital content in a descrambled format to provide a second output including said digital content in a re-scrambled format, said means for re-scrambling being deployed in a second conditional access unit; and

means for outputting said first output including said digital content in a descrambled format and a second output including said digital content in a re-scrambled format.

12. The copy management system of claim 11, further comprising means for receiving and recording said digital content of said second output in a scrambled format along with an access requirement associated with said digital content.

13. The copy management system of claim 11, further comprising:

demultiplexing said digital content from said program data; and

decompressing said digital content in a descrambled format to a decompressed state.

14. The copy management system of claim 11, wherein said first conditional access unit is different than said second conditional access unit and is implemented with a single digital received.

15. The copy management system of claim 11, wherein said digital content is content contained in digital television transmissions.

16. The copy management system of claim 11, wherein said digital content is content downloaded from the Internet.

17. The copy management system of claim 11, wherein said means for descrambling comprises:

means for extracting a descrambling key included in said program data; and

means for applying said descrambling key to said digital content in a scrambled format to provide said digital content in a descrambled format.

18. The copy management system of claim 11, wherein said descrambling is conducted using a key also used to re-scramble said digital content.