Information recording apparatus and method, information reproduction apparatus and method, information recording medium, program storage medium and program

• US 20030219230A1
• Filed: 01/27/2003
• Published: 11/27/2003
• Est. Priority Date: 01/28/2002
• Status: Active Grant

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Kato, Motoki
• Granted Patent: US 7,813,249 B2
• 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 20/00507 wherein consecutive physical data units of the record carrier are encrypted with separate encryption keys, e.g. the key changes on a cluster or sector basis
• 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 20/00775 wherein said copy control information is encoded in an encryption mode indicator [EMI]
• CPC Class Codes: G11B 27/3027 used signal is digitally coded
• CPC Class Codes: H04N 5/913 for scrambling ; for copy protection

Abstract

An information recording apparatus and method and an information reproduction apparatus and method enable security information of AV data to be managed appropriately. A copy control information detection section acquires copy control information (CCI_i) of a video signal supplied from a terminal and outputs it to a controller. The controller determines the values of is_not_free and is_encrypted based on the copy control information supplied from the copy control information detection section and outputs the values to a source packetization section. Is_not_free and is_encrypted represent a limitation to copying and an encryption mode of data recorded on a recording medium, respectively, and are described in the header of a source packet produced by a source packetization section. The source packet produced by the source packetization section is encrypted in accordance with the value of is_encrypted, undergoes a predetermined process by an encryption section, and is then recorded onto the recording medium.

Claims

1. An information recording apparatus, comprising:

an acquisition unit operable to acquire first copy control information representative of whether recording of input contents onto a recording medium is permitted;

a production unit operable to produce, based on the first copy control information, control information capable of representing whether copying of the contents recorded on the recording medium is permitted and whether the contents are in an encrypted state regardless of whether the copying of the contents is permitted; and

a recording unit operable to record the control information onto the recording medium together with the contents.

2. An information recording apparatus according to claim 1, wherein the control information is capable of representing at least whether the copying of the contents recorded on the recording medium is permitted and whether the contents are in an encrypted state.

3. An information recording apparatus according to claim 2, wherein the control information is further capable of representing whether encryption of the contents should be compelled.

4. An information recording apparatus according to claim 2, wherein the contents are formed from an MPEG transport stream, and the first copy control information is placed in a packet header of the MPEG transport stream.

5. An information recording apparatus according to claim 4, further comprising an encryption unit operable to encrypt the contents based on the encryption identification information, wherein, when the contents are to be recorded in a predetermined unit composed of a plurality of packets, the encryption unit encrypts data of a unit succeeding a packet header of an initial packet of the unit, and does not encrypt data of the packet header of the initial packet of the unit.

6. An information recording apparatus according to claim 2, wherein the contents are formed from an analog video signal, and the first copy control information is placed in a vertical blanking period of the analog video signal.

7. An information recording apparatus according to claim 2, wherein, when the first copy control information represents that recording of the contents onto the recording medium is permitted only once, the production unit produces second copy control information representing that the contents cannot be copied any more and produces encryption identification information representing that the contents are in an encrypted state.

8. An information recording apparatus according to claim 2, wherein, when the first copy control information represents that free recording of the contents is permitted, the production unit produces second copy control information representing that free recording of the contents is permitted and produces encryption identification information representing that the contents are in an encrypted state.

9. An information processing apparatus according to claim 2, wherein the control information includes second copy control information representative of whether the copying of the contents recorded on the recording medium is permitted and encryption identification information representative of whether the contents are in an encrypted state.

10. An information recording apparatus according to claim 9, further comprising an encryption unit operable to encrypt the contents based on the encryption identification information, the recording unit recording the contents encrypted by the encryption unit onto the recording medium.

11. An information recording apparatus according to claim 9, wherein the production unit further produces information representative of whether encryption of the contents should be compelled.

12. An information recording method, comprising:

acquiring copy control information representative of whether recording of input contents onto a recording medium is permitted;

producing, based on the copy control information, control information capable of representing whether copying of the contents recorded on the recording medium is permitted and whether the contents are in an encrypted state regardless of whether the copying of the contents is permitted; and

recording the control information onto the recording medium together with the contents.

13. A program storage medium recorded with a computer-readable program, the program comprising:

acquiring copy control information representative of whether recording of input contents onto a recording medium is permitted;

producing, based on the copy control information, control information capable of representing whether copying of the contents recorded on the recording medium is permitted and whether the contents are in an encrypted state regardless of whether the copying of the contents is permitted; and

recording the control information onto the recording medium together with the contents.

14. A system for recording information, comprising:

a processor operable to execute instructions; and

instructions, the instructions including;

acquiring copy control information representative of whether recording of input contents onto a recording medium is permitted;

producing, based on the copy control information, control information capable of representing whether copying of the contents recorded on the recording medium is permitted and whether the contents are in an encrypted state regardless of whether the copying of the contents is permitted; and

recording the control information onto the recording medium together with the contents.

15. An information recording medium recorded with instructions, the instructions comprising:

copy control information representative of whether recording of input contents onto a recording medium is permitted; and

control information based on the copy control information and capable of representing whether copying of the contents recorded on the recording medium is permitted and whether the contents are in an encrypted state regardless of whether the copying of the contents is permitted.

16. An information reproduction apparatus for reproducing contents recorded on a recording medium, comprising:

an acquisition unit operable to acquire copy control information added to the contents based on whether recording of the contents onto the recording medium was permitted and control information capable of representing whether copying of the contents is permitted and whether the contents are in an encrypted state regardless of whether the copying of the contents is permitted; and

a decrypting unit operable to decrypt the contents when the control information represents that the contents are in an encrypted state.

17. An information reproduction apparatus according to claim 16, further comprising an output unit operable to add to the contents relationship information representative of a matching relationship between the copy control information and an encryption mode based on the copy control information to produce a predetermined packet and to output the predetermined packet.

18. An information reproduction apparatus according to claim 17, further comprising a reproducing unit operable to reproduce the predetermined packet output from the output unit based on the relationship information.

19. An information reproduction apparatus according to claim 17, wherein the acquisition unit acquires, as the control information, information representative of whether the contents are in an encrypted state and information representative of whether encryption of the contents should be compelled, and the output unit outputs the relationship information based on the information acquired by the acquisition unit.

20. A method for reproducing contents recorded on a recording medium, comprising:

acquiring copy control information added to the contents based on whether recording of the contents onto the recording medium was permitted and control information capable of representing whether copying of the contents is permitted and whether the contents are in an encrypted state regardless of whether the copying of the contents is permitted; and

decrypting the contents when the control information represents that the contents are in an encrypted state.

21. A program storage medium recorded with a program for reproducing contents recorded on a recording medium, the program comprising:

acquiring copy control information added to the contents based on whether recording of the contents onto the recording medium was permitted and control information capable of representing whether copying of the contents is permitted and whether the contents are in an encrypted state regardless of whether the copying of the contents is permitted; and

decrypting the contents when the control information represents that the contents are in an encrypted state.

22. A system for reproducing contents recorded on a recording medium, comprising:

a processor operable to execute instructions; and

instructions, the instructions including;

acquiring copy control information added to the contents based on whether recording of the contents onto the recording medium was permitted and control information capable of representing whether copying of the contents is permitted and whether the contents are in an encrypted state regardless of whether the copying of the contents is permitted; and

decrypting the contents when the control information represents that the contents are in an encrypted state.