System and method for controlling copying and playing of digital programs

• US 5,896,454 A
• Filed: 03/08/1996
• Issued: 04/20/1999
• Est. Priority Date: 03/08/1996
• Status: Expired due to Term

• Current Assignee: Warner Bros Home Entertainment Incorporated (Warner Bros. Discovery, Inc.)
• Original Assignee: Time Warner Entertainment Company LP (Charter Communications Incorporated)
• Inventors: Ostrover, Lewis S., Cookson, Christopher J.
• Primary Examiner(s): Buczinski, Stephen C.
• Application Number:
  US08/612,567
• Time in Patent Office: 1,138 Days
• Field of Search: 380/3, 380/4, 380/5
• US Class Current: 360/60
• 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 20/00094 involving measures which result in a restriction to authorised record carriers
• 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 23/284 on the record carrier
• 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 5/913 for scrambling ; for copy protection

Abstract

A system and method for preventing effective copying of digital recordings. A copy-state code accompanies each recording, one state of which represents that no copies at all are to be made of the recording. Compatible players are designed to prevent play of any writable disk which includes a "no-copy" code. It is the inconsistency between the code and the medium containing it that causes play of the medium to be inhibited.

Claims

1. A method for preventing play of digital programs copied without authorization and contained on media which are playable in compatible players, comprising the steps of:

(a) storing within the programs contained on said media indicia representing whether making copies of said programs is allowed or prohibited,

(b) enabling said players

(i) to distinguish between read-only media and writable media, and

(ii) to determine from said indicia stored within the programs contained on said media whether making copies of said programs is allowed or prohibited, and

(c) preventing said players from playing writable media containing programs whose stored indicia represent prohibitions against the making of copies.

2. A method in accordance with claim 1 wherein said programs include one or more of audio, video, audio-video, text and data.

3. A method in accordance with claim 2 wherein said indicia are in the form of digital codes.

4. A method in accordance with claim 1 wherein said indicia are in the form of digital codes.

5. A method for preventing play of digital programs copied without authorization and contained on media which are playable in compatible players, comprising the steps of:

(a) storing on said media in indicia representing copying authorization codes,

(b) enabling said players

(i) to distinguish between different types of media, and

(ii) to determine from said indicia the copying authorization codes for said media, and

(c) preventing said players from playing media whose represented copying authorization codes are inconsistent with the media themselves.

6. A method in accordance with claim 5 wherein said programs include one or more of audio, video, audio-video, text and data.

7. A method in accordance with claim 6 wherein said indicia are in the form of digital codes.

8. A method in accordance with claim 5 wherein said indicia are in the form of digital codes.

9. A system for preventing play of digital programs copied without authorization and contained on media which are playable in compatible players comprising:

(a) a plurality of media containing programs which include indicia representing whether making copies of said programs is allowed or prohibited, and

(b) a plurality of players each including means for

(i) distinguishing between read-only media and writable media,

(ii) determining from the indicia stored within the programs contained on said media whether making copies of said programs is allowed or prohibited, and

(iii) preventing play of writable media with programs whose stored indicia represent prohibitions against the making of copies.

10. A system in accordance with claim 9 wherein said programs include one or more of audio, video, audio-video, text and data.

11. A system in accordance with claim 10 wherein said indicia are in the form of digital codes.

12. A system in accordance with claim 9 wherein said indicia are in the form of digital codes.

13. A system for preventing play of digital programs copied without authorization and contained on media which are playable in compatible players comprising:

(a) a plurality of media containing both digital programs and indicia representing copying authorization codes, and

(b) a plurality of players each including means for

(i) distinguishing between different types of media,

(ii) determining from said indicia the copying authorization codes for said media, and

(iii) preventing play of media whose contained indicia represent copying authorization codes which are inconsistent with the media types.

14. A system in accordance with claim 13 wherein said media contain one or more of audio, video, audio-video, text and data programs.

15. A system in accordance with claim 14 wherein said indicia are in the form of digital codes.

16. A system in accordance with claim 13 wherein said indicia are in the form of digital codes.

17. A player for a plurality of media, said media containing programs which include indicia representing whether making copies of said programs is allowed or prohibited, comprising means for distinguishing between read-only media and writable media;

means for determining from the indicia included in the programs contained on said media whether making copies of said programs is allowed or prohibited; and

means for preventing play of writable media containing programs whose indicia represent a prohibition against the making of copies, and allowing play of read-only media and writable media containing programs whose indicia represent the allowance of copying.

18. A player in accordance with claim 17 wherein said programs include one or more of audio, video, audio-video, text and data.

19. A player in accordance with claim 18 wherein said indicia are in the form of digital codes.

20. A player in accordance with claim 17 wherein said indicia are in the form of digital codes.

21. A player for a plurality of media, said media containing both digital programs and indicia representing copying authorization codes, comprising means for distinguishing between different types of media, means for determining from said indicia the copying authorization codes for said media, and means for preventing play of media whose contained indicia represent copying authorization codes which are inconsistent with the media types.

22. A player in accordance with claim 21 wherein said programs include one or more of audio, video, audio-video, text and data.

23. A player in accordance with claim 22 wherein said indicia are in the form of digital codes.

24. A player in accordance with claim 21 wherein said indicia are in the form of digital codes.

25. A plurality of digital media each of which includes, in addition to program material, one of four copy-state codes to represent whether such program material can be copied without restriction, can be copied to make first-generation copies only, already constitutes a first-generation copy from which additional copies should not be made, or should not be copied at all, with four subsets of the digital media in said plurality including respective ones of the four copy-state codes.

26. A plurality of digital media each of which includes, in addition to program material, at least one code of two types of copy-state codes, one of which represents an authorization to play any medium on which the type of code appears, and the other of which represents a prohibition against play of any writable medium in which the type of code appears, with two subsets of the digital media in said plurality including respective ones of the two types of copy-state code.