Data transfer system, data transfer apparatus, data recording apparatus, data transfer method

• US 7,437,770 B2
• Filed: 06/18/2002
• Issued: 10/14/2008
• Est. Priority Date: 06/18/2001
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Tanaka, Masao, Matsuda, Hiromi, Abe, Miki, Hosoi, Takafumi
• Primary Examiner(s): Revak; Christopher A
• Application Number:
  US10/344,867
• Publication Number:
  US 20040010468A1
• Time in Patent Office: 2,310 Days
• Field of Search: None
• US Class Current: 726/29
• CPC Class Codes: G06F 2003/0697 device management, e.g. handlers, drivers, I/O schedulers
• CPC Class Codes: G06F 3/0601 Interfaces specially adapted for storage systems
• 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 20/00181 using a content identifier, e.g. an international standard recording code [ISRC] or a digital object identifier [DOI]
• CPC Class Codes: G11B 20/0021 involving encryption or decryption of contents recorded on or reproduced from a record carrier
• CPC Class Codes: G11B 20/00478 wherein contents are decrypted and re-encrypted with a different key when being copied from/to a record carrier
• CPC Class Codes: G11B 20/00492 wherein content or user data is encrypted
• CPC Class Codes: G11B 20/00789 wherein the usage restriction limits the number of functional copies, which can be accessed at a time, e.g. electronic bookshelf concept, virtual library, video rentals or check-in/check out
• CPC Class Codes: G11B 20/10 Digital recording or reproducing
• CPC Class Codes: G11B 2020/1277 for managing gaps between two recordings, e.g. control data in linking areas, run-in or run-out fields, guard or buffer zones
• CPC Class Codes: H04L 2463/101 applying security measures for digital rights management
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload

Abstract

A data transfer apparatus referred to as a primary-recording-medium apparatus implements proper system operations by acquisition of information on a secondary recording medium mounted on a secondary-recording-medium apparatus to serve as a destination of a transfer (or a check-out) of a content. If a medium adopting its own unique management technique as is the case with a mini disc is used as the secondary recording medium serving as a destination of a check-out, the primary-recording-medium apparatus acquires information on the secondary recording medium from the secondary-recording-medium apparatus, which is typically a data-recording apparatus. The information includes an indicator as to whether or not the secondary recording medium has been mounted on the data-recording apparatus, the name of the secondary recording medium, the name of each content stored in the secondary recording medium, the number of contents stored in the secondary recording medium and attributes of each content stored in the secondary recording medium.

Claims

1. A data transfer system including a data transfer apparatus and a data-recording apparatus wherein:

the data transfer apparatus comprises;

means for storing content data in an encrypted state, a first content ID unique to the content data, and table data onto the primary recording medium of the data transfer apparatus;

means for transferring content data to the data-recording apparatus as a result of a check-out operation of the content data;

means for receiving a second content ID generated by the data-recording apparatus based on the transferred content data of the check-out operation, wherein the second content ID is stored as an element of the table data;

means for transmitting a command requesting, from the data-recording apparatus, information including a third content ID which corresponds to the content data stored on a secondary recording medium of the data-recording apparatus, as a result of a check-in operation of the content data;

means for receiving a third content ID generated by the data-recording apparatus;

means for comparing the third content ID to the second content ID previously received from the data-recording apparatus, for ensuring that the content data checked-in corresponds to the content data checked-out; and

means for checking-in the content data corresponding to the first content ID if the second content ID and the third content ID match; and

the data-recording apparatus comprises;

means for exchanging content data with the data transfer apparatus;

means for recording and reproducing data onto and from the secondary recording medium;

means for decrypting encrypted content data received from the data transfer apparatus;

means for recording the decrypted content data onto the secondary recording medium;

means for generating the second content ID and the third content ID based on data extracted from two sampling locations in the content data, wherein the locations are determined in accordance with the data length of the content data; and

means for transmitting the second content ID or the third content ID to the data transfer apparatus.

2. A data transfer system according to claim 1, wherein the information on the secondary recording medium further includes information indicating whether or not the secondary recording medium has been mounted on the data-recording apparatus.

3. A data transfer system according to claim 1, wherein the information on the secondary recording medium further includes a name of the secondary recording medium mounted on the data-recording apparatus or a name of each content data recorded on the secondary recording medium.

4. A data transfer system according to claim 1, wherein the information on the secondary recording medium further includes a capacity of the secondary recording medium mounted on the data-recording apparatus.

5. A data transfer system according to claim 1, wherein the information on the secondary recording medium further includes the number of contents stored on the secondary recording medium mounted on the data-recording apparatus.

6. A data transfer system according to claim 1, wherein the information on the secondary recording medium further includes attributes of each content data recorded on the secondary recording medium mounted on the data-recording apparatus.

7. A data transfer system according to claim 1, wherein the data transfer apparatus forms a judgment as to whether or not data content stored in the primary recording medium should be transmitted to the data-recording apparatus on the basis of the information on the secondary recording medium.

8. A data transfer apparatus comprising:

means for storing content data in an encrypted state, a first content ID unique to the content data, and table data onto a primary recording medium;

means for transferring content data as a result of a check-out operation of the content data to an external data-recording apparatus which stores the content data onto a secondary recording medium;

means for receiving a second content ID generated by the data-recording apparatus based on the transferred content data of the check-out operation, wherein the second content ID is stored as an element of the table data;

means for transmitting a command requesting, from the data-recording apparatus, information including a third content ID which corresponds to the content data stored on the secondary recording medium of the data-recording apparatus as a result of a check-in operation of the content data;

means for receiving a third content ID generated by the data-recording apparatus;

means for comparing, the third content ID to the second content ID previously received from the data-recording apparatus, for ensuring that the content data checked-in corresponds to the content data checked-out; and

means for checking-in the content data corresponding to the first content ID if the second content ID and the third content ID match;

wherein the second content ID and the third content ID are generated based on data extracted from two sampling locations in the content data stored in said secondary recording medium, wherein the locations are determined in accordance with the data length of the content data.

9. A data transfer apparatus according to claim 8, wherein the information on the secondary recording medium further includes information indicating whether or not the secondary recording medium has been mounted on the data-recording apparatus.

10. A data transfer apparatus according to claim 8, wherein the information on the secondary recording medium further includes a name of the secondary recording medium mounted on the data-recording apparatus or a name of each content data recorded on the secondary recording medium.

11. A data transfer apparatus according to claim 8, wherein the information on the secondary recording medium further includes a capacity of the secondary recording medium mounted on the data-recording apparatus.

12. A data transfer apparatus according to claim 8, wherein the information on the secondary recording medium further includes the number of contents stored on the secondary recording medium mounted on the data-recording apparatus.

13. A data transfer apparatus according to claim 8, wherein the information on the secondary recording medium further includes attributes of each content data recorded on the secondary recording medium mounted on the data-recording apparatus.

14. A data transfer apparatus according to claim 8, wherein the data transfer apparatus forms a judgment as to whether or not data content stored in the primary recording medium should be transmitted to the data-recording apparatus on the basis of said information on said secondary recording medium.

15. A data-recording apparatus comprising:

means for exchanging content data with an external data transfer apparatus;

means for decrypting encrypted content data received from the data transfer apparatus;

means for recording the decrypted content data onto a secondary recording medium;

means for generating a first content ID based on data extracted from two sampling locations in the content data, wherein the locations are determined in accordance with the data length of the content data; and

means for transmitting information including the first content ID to the data transfer apparatus for comparing the first content ID to a second content ID stored on said data transfer apparatus, wherein the content data can be checked-in to the data transfer apparatus when the first content ID and the second content ID match.

16. A data-recording apparatus according to claim 15, wherein the information further indicates whether or not the secondary recording medium has been mounted on the data-recording apparatus.

17. A data-recording apparatus according to claim 15, wherein the information further indicates a name of the secondary recording medium mounted on the data-recording apparatus or a name of each content data recorded on the secondary recording medium.

18. A data-recording apparatus according to claim 15, wherein the information further indicates a capacity of the secondary recording medium mounted on the data-recording apparatus to the data transfer apparatus.

19. A data-recording apparatus according to claim 15, wherein the information further indicates the number of contents stored on the secondary recording medium mounted on the data-recording apparatus to the data transfer apparatus.

20. A data-recording apparatus according to claim 15, wherein the information further indicates attributes of each content data recorded on the secondary recording medium mounted on the data-recording apparatus to the data transfer apparatus.

21. A data transfer method comprising:

storing encrypted content data, a first content ID unique to said content data, and table data onto a primary recording medium in a data transfer apparatus;

recording and reproducing the content data onto and from a secondary recording medium in a data recording apparatus in an unencrypted state, the data transfer apparatus being connected to the data-recording apparatus so that the data transfer apparatus and the data-recording apparatus are capable of communicating with each other;

confirming that the secondary recording medium has been mounted onto the data-recording apparatus;

acquiring information on the secondary recording medium from the data-recording apparatus, wherein the information includes at least a second content ID generated by the data-recording apparatus, based on data extracted from two sampling locations in the content data, wherein the locations are determined in accordance with the data length of the content data;

confirming that the data-recording apparatus is a valid destination of a transfer of the content data stored in the primary recording medium, based on the information;

judging whether or not the content data should be transferred to the data-recording apparatus, based on the information; and

upon judging that the content data should be transferred, transferring the content data to the data-recording apparatus, wherein the second content ID generated by the data-recording apparatus is associated with the first content ID, thereby completing a check-out operation for the content data.

22. A data transfer method according to claim 21, wherein acquiring information includes acquiring a name of the secondary recording medium or a name of each content data recorded on the secondary recording medium.

23. A data transfer method according to claim 21, wherein acquiring information includes acquiring a capacity of the secondary recording medium from the data-recording apparatus.

24. A data transfer method according to claim 21, wherein acquiring information includes acquiring the number of contents recorded on the secondary recording medium from the data-recording apparatus.

25. A data transfer method according to claim 21, wherein acquiring information includes acquiring attributes of the content data recorded on the secondary recording medium from the data-recording apparatus.