CPS unit management in the disc for downloaded data

• US 8,873,934 B2
• Filed: 03/31/2009
• Issued: 10/28/2014
• Est. Priority Date: 03/31/2008
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.), Sony Corporation Of America (Sony Group Corp.), Sony Pictures Entertainment Incorporated (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Takashima, Yoshikazu, Hattori, Shinobu, Anbananthan, Saravana Prabhu
• Primary Examiner(s): Armouche, Hadi
• Assistant Examiner(s): HO, DAO Q
• Application Number:
  US12/415,694
• Publication Number:
  US 20090269042A1
• Time in Patent Office: 2,037 Days
• Field of Search: 386/252, 386/248, 386/240
• US Class Current: 386/252
• CPC Class Codes: G06F 13/30 with priority control
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]
• 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 20/00362 the key being obtained from a media key block [MKB]
• CPC Class Codes: G11B 20/00427 advanced access content system [AACS]
• CPC Class Codes: G11B 20/00528 wherein each title is encrypted with a separate encryption key for each title, e.g. title key for movie, song or data file
• CPC Class Codes: G11B 20/00731 involving a digital rights management system for enforcing a usage restriction
• CPC Class Codes: G11B 20/00862 wherein the remote server can grant the permission to use a content
• CPC Class Codes: G11B 20/00869 wherein the remote server can deliver the content to a receiving device
• CPC Class Codes: G11B 2220/2516 Hard disks
• CPC Class Codes: G11B 2220/2541 Blu-ray discs; Blue laser DVR discs
• CPC Class Codes: G11B 2220/41 Flat as opposed to hierarchical combination, e.g. library of tapes or discs, CD changer, or groups of record carriers that together store one title
• CPC Class Codes: H04N 5/85 on discs or drums

Abstract

An information processing device comprising: a data processing unit configured to load a disk, which stores content that is divided into content usage control units, and to execute processes for reading the content; and a local storage unit configured to store subsequential data obtained and/or generated subsequentially, wherein the data processing unit is configured to perform processes to: select a title that is an index for reading the subsequential data from dummy titles stored in advance on the disk; set the title as a title for the subsequential data; and store the subsequential data in the local storage unit.

Claims

1. An information processing device comprising:

a central processing unit (CPU) operable to;

load a disc, which stores content that is divided into content control units;

select a dummy title, that is an index for reading data, from dummy titles stored in advance on the disc, wherein the data is associated with the content stored on the disc and used in conjunction when reading the content stored on the disc, wherein the data is downloaded from a server;

set the selected dummy title as a title for the data;

store the data in a local storage unit of the information processing device; and

store a virtual file system in the local storage unit, wherein the virtual file system is constructed by combining the data and the content, wherein the content stored in the disc and the data stored in the local storage unit are read in conjunction using the virtual file system.

2. The information processing device as set forth in claim 1, wherein

the content stored on the disc has settings, wherein an association is defined with usage control information, and

the CPU is operable to set as a membership unit of the data, a content control unit that is associated with the usage control information that matches usage control status of the data.

3. The information processing device as set forth in claim 2, wherein

the content stored on the disc has a setting to determine whether there is a correspondence to encrypted content by the content control unit,

wherein if the data is encrypted data, then a content control unit corresponding to encrypted content is set as a membership unit, and if the data is non-encrypted data, then a content control unit corresponding to non-encrypted content is set as a membership unit.

4. The information processing device as set forth in claim 1, wherein the CPU is operable to set a membership unit of the data in accordance with unit specifying information received from the server.

5. The information processing device as set forth in claim 1, wherein

dummy titles that are recorded in advance on the disc have a structure that is set as a title that evokes a program for reading the data, wherein the program for reading the data is recorded on the disc, and

the CPU is operable to evoke the program for reading the data depending on specification of the dummy title that is set as the title for the data, to read the data that is stored in the local storage unit.

6. The information processing device as set forth in claim 5, wherein

the program for reading the data is set to be evoked by different titles of a plurality of content control units that are set on the disc, and

the CPU is operable to evoke the program for reading the data, based on specifications of the different titles of the plurality of content control units, to read the data.

7. The information processing device as set forth in claim 5, wherein the CPU is operable to:

receive an updating program for reading the data that is stored on the disc; and

store the updated program into the local storage unit as a setting that is evoked by the specification of the dummy title.

8. The information processing device as set forth in claim 1, wherein the CPU is operable to identify a unit belonging to the content being read in the information processing device, and to perform a read content limiting process that selects, as read-enabled content, the data belonging to the same unit as the identified unit.

9. The information processing device as set forth in claim 8, wherein the CPU is operable to execute the read content limiting process in accordance with a program for reading the data.

10. The information processing device as set forth in claim 1, wherein the CPU is operable to structure the virtual file system to perform parallel reading of the content stored on the disc and the data stored in the local storage unit.

11. The information processing device as set forth in claim 1, wherein filenames of the data stored in the local storage unit are converted in accordance with a file named conversion table when the CPU structures the virtual file system.

12. The information processing device as set forth in claim 1, wherein the CPU constructs the virtual file system by virtually combining directory and files of the local storage unit, and directories and files of the disc.

13. The information processing device as set forth in claim 12, wherein the virtual file system is updated each time when there is a change in the directory or files of the local storage unit.

14. The information processing device as set forth in claim 1, wherein the content stored on the disc comprises an Audio Visual (AV) stream data, a Media Key Block that enables acquisition of a media key required for decrypting the content, a process control file, usage control information, and a CPS Unit Key File that stores data required to obtain a CPS unit key for decrypting the CPS.

15. A non-transitory computer readable medium having stored thereon, a program for controlling data in an information processing device, wherein an information recording device loaded in the information processing device comprises:

content including stream data to be read and titles that are indexes for specifying data reading,

wherein the content is divided into units as content control units,

wherein the titles include dummy titles that are set as indexes in association with the data, that is stored in a local storage unit of the information processing device after being acquired from a server, to enable reading of the data in response to a read instruction for a title that is associated with the data,

wherein the data is associated with the content stored in the information recording device and used in conjunction when reading the content stored in the information recording device,

wherein a virtual file system, constructed by combining the data and the content stored in the information recording device, is stored in the local storage unit,

wherein the content stored in the information recording device and the data stored in the local storage unit are read in conjunction using the virtual file system.

16. The non-transitory computer readable medium as set forth in claim 15, wherein

usage control information for a content control unit is associated with the stream data stored on the information recording device,

wherein the dummy titles are set for each individual content control unit that is set in the information recording device,

wherein a dummy title that is associated with the data in the information recording device is set to be selectable from dummy titles that belong to a content control unit that has usage control information matching usage control status of the data.

17. The non-transitory computer readable medium as set forth in claim 15, wherein

a program for reading the data evoked by the dummy title is stored in advance on the information recording device, and

the information processing device, when reading the data, evokes the program for reading the data in response to the specification of a dummy title that is set as a title for the data, to read the data that is stored in the local storage unit.

18. The non-transitory computer readable medium as set forth in claim 17, wherein the program for reading the data is a program set to be evoked by different titles of a plurality of content control units that are set in the information recording device.

19. An information processing method comprising:

loading a disc storing content that is divided into content control units in an information processing device, wherein data associated with the content stored in the disc is downloaded from a server, wherein the data is used in conjunction when reading the content stored on the disc;

selecting, from dummy titles stored in advance on the disc, a dummy title that is an index for specifying reading of the data;

setting the selected dummy title as a title for the data;

storing the data in a local storage unit; and

storing a virtual file system, constructed by combining the data stored in the local storage unit and the content stored on the disc, in the local storage unit, wherein the content stored in the disc and the data stored in the local storage unit are read in conjunction using the virtual file system.

20. A non-transitory computer readable medium having stored thereon, a program for controlling data in an information processing device, the program when executed by a computer cause the computer to:

load a disc storing content that is divided into usage control units into the information processing device, wherein the data is associated with the content stored in the disc and used in conjunction when reading the content stored in the disc, wherein the data is downloaded from a server;

select, from dummy titles stored in advance on the disc, a dummy title that is an index for specifying reading of the data;

set the selected dummy title as a title for the data;

store the data in a local storage unit of the information processing device; and

store a virtual file system, constructed by combining the data stored in the local storage unit and the content stored on the disc, in the local storage unit, wherein the content stored in the disc and the data stored in the local storage unit are read in conjunction using the virtual file.