Information processing apparatus, information processing method, information processing program, reproduction device, and information processing system that identifies content using a similarity calculation

• US 8,185,541 B2
• Filed: 09/01/2009
• Issued: 05/22/2012
• Est. Priority Date: 09/02/2008
• Status: Expired due to Fees

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Kasai, Kouichi
• Primary Examiner(s): Wong, Leslie
• Application Number:
  US12/552,052
• Publication Number:
  US 20100057731A1
• Time in Patent Office: 994 Days
• Field of Search: 707/758, 707/822, 707/975, 707/999.107, 707/999.006, 369/30.04, 369/47.12, 360/15
• US Class Current: 707/758
• 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 20/00427 advanced access content system [AACS]
• CPC Class Codes: G11B 2220/2541 Blu-ray discs; Blue laser DVR discs
• CPC Class Codes: G11B 27/28 by using information signals recorded by the same method as the main recording G11B27/22 takes precedence

Abstract

An information processing apparatus includes a communication unit configured to receive, from a reproduction device that reproduces content recorded on a loaded recording medium, content forming information regarding the structure of the content; a degree-of-similarity calculation unit configured to compare the content forming information received by the communication unit with content forming information registered in advance for each package of an information recording medium in a predetermined database and calculate a degree of similarity between the content forming information received by the communication unit and the content forming information registered in advance in the database; and a package determination unit configured to determine the package of the information recording medium loaded into the reproduction device by using the degree of similarity calculated by the degree-of-similarity calculation unit.

Claims

1. An information processing apparatus comprising:

a communication unit configured to receive, from a reproduction device that reproduces content recorded on a loaded recording medium, content forming information regarding the structure of the content, the content forming information including a number of items of data forming content recorded on the recording medium and a size of each of the items of data;

a degree-of-similarity calculation unit configured to compare the content forming information received by the communication unit with content forming information registered in advance for each package of an information recording medium in a predetermined database and calculate a degree of similarity between the content forming information received by the communication unit and the content forming information registered in advance in the database, the degree-of-similarity calculation unit calculating the degree of similarity based on the number of items of data forming content recorded on the recording medium and the size of each of the items of data; and

a package determination unit configured to determine the package of the information recording medium loaded into the reproduction device by using the degree of similarity calculated by the degree-of-similarity calculation unit.

2. The information processing apparatus according to claim 1, wherein the degree-of-similarity calculation unit calculates a difference between the content forming information received by the communication unit and the content forming information registered in advance for each package of an information recording medium in the database and calculates the degree of similarity on the basis of the difference.

3. The information processing apparatus according to claim 2, further comprising:

a content-associated information obtaining unit configured to obtain, from a predetermined database, content-associated information associated with content corresponding to the package determined by the package determination unit, wherein the communication unit transmits the content-associated information obtained by the content-associated information obtaining unit to the reproduction device.

4. The information processing apparatus according to claim 2, further comprising:

a package search unit configured to compare predetermined information contained in the content forming information received by the communication unit with the predetermined information contained in the content forming information registered in advance for each package of an information recording medium in the database and search for a package having content forming information whose degree of similarity is predicted to be high on the basis of the result of the comparison, wherein the degree-of-similarity calculation unit calculates a difference between the content forming information received by the communication unit and the content forming information of the package found by the package search unit and calculates the degree of similarity on the basis of the difference.

5. The information processing apparatus according to claim 2, wherein the package determination unit determines a package having the highest degree of similarity among the degrees of similarity calculated by the degree-of-similarity calculation unit to be a package of the information recording medium loaded into the reproduction device.

6. The information processing apparatus according to claim 2, wherein the package determination unit determines a package having a degree of similarity of a certain level or higher among the degrees of similarity calculated by the degree-of-similarity calculation unit to be the package of the information recording medium loaded into the reproduction device, and wherein when there are two or more packages determined by the package determination unit, the communication unit transmits a list of the packages to the reproduction device.

7. The information processing apparatus according to claim 2, wherein on the recording medium, the content forming information is recorded as part of certification information with which a third party management organization certifies that content recorded on the recording medium is legitimate, and wherein the communication unit receives, from the reproduction device, the content forming information obtained on the basis of the content forming information recorded as part of the certification information on the recording medium.

8. An information processing method comprising:

receiving, by a communication unit, from a reproduction device that reproduces content recorded on a loaded recording medium, content forming information regarding the structure of the content, the content forming information including a number of items of data forming content recorded on the recording medium and a size of each of the items of data;

comparing, by a degree-of-similarity calculation unit, the content forming information received by the communication unit with content forming information registered in advance for each package of an information recording medium in a predetermined database, and calculating a degree of similarity between the content forming information received by the communication unit and the content forming information registered in advance in the database, the degree-of-similarity calculation unit calculating the degree of similarity based on the number of items of data forming content recorded on the recording medium and the size of each of the items of data; and

determining, by a package determination unit, the package of the information recording medium loaded into the reproduction device by using the degree of similarity calculated by the degree-of-similarity calculation unit.

9. A reproduction device comprising:

a reproduction unit configured to reproduce content recorded on a loaded recording medium;

a content forming information obtaining unit configured to obtain content forming information regarding the structure of the content, the content forming information including a number of items of data forming content recorded on the recording medium and a size of each of the items of data; and

a communication unit configured to transmit the content forming information obtained by the content forming information obtaining unit to an information processing apparatus that receives the content forming information, compares the received content forming information with content forming information registered in advance for each package of an information recording medium in a predetermined database, calculates a degree of similarity between the received content forming information and the content forming information registered in advance in the database, the information processing apparatus calculating the degree of similarity based on the number of items of data forming content recorded on the recording medium and the size of each of the items of data, and determines the package of the loaded information recording medium by using the calculated degree of similarity.

10. The reproduction device according to claim 9, wherein the communication unit includes a display controller configured to receive content-associated information regarding content corresponding to the package of the loaded information recording medium from the information processing apparatus and cause a display unit to display the content-associated information received by the communication unit.

11. The reproduction device according to claim 9, wherein on the recording medium, the content forming information is recorded as part of certification information with which a third party management organization certifies that content recorded on the recording medium is legitimate, and wherein the content forming information obtaining unit obtains the content forming information on the basis of the content forming information recorded as part of the certification information on the recording medium.

12. An information processing method comprising:

obtaining, by a content forming information obtaining unit, content forming information regarding the structure of content recorded on a loaded recording medium, the content forming information including a number of items of data forming content recorded on the recording medium and a size of each of the items of data; and

transmitting, by a communication unit, the content forming information obtained by the content forming information obtaining unit to an information processing apparatus that receives the content forming information, compares the received content forming information with content forming information registered in advance for each package of an information recording medium in a predetermined database, calculates a degree of similarity between the received content forming information and the content forming information registered in advance in the database, the information processing apparatus calculating the degree of similarity based on the number of items of data forming content recorded on the recording medium and the size of each of the items of data, and determines the package of the loaded information recording medium by using the calculated degree of similarity.

13. An information processing system comprising:

a reproduction device including

a reproduction unit configured to reproduce content recorded on a loaded recording medium,

a content forming information obtaining unit configured to obtain content forming information regarding the structure of the content, the content forming information including a number of items of data forming content recorded on the recording medium and a size of each of the items of data, and

a communication unit configured to transmit the content forming information obtained by the content forming information obtaining unit to the outside; and

an information processing apparatus including

a communication unit configured to receive the content forming information from the reproduction device,

a degree-of-similarity calculation unit configured to compare the content forming information received by the communication unit with content forming information registered in advance for each package of an information recording medium in a predetermined database, and calculate a degree of similarity between the content forming information received by the communication unit and the content forming information registered in advance in the database, the degree-of-similarity calculation unit calculating the degree of similarity based on the number of items of data forming content recorded on the recording medium and the size of each of the items of data, and

a package determination unit configured to determine the package of the loaded information recording medium loaded into the reproduction device by using the degree of similarity calculated by the degree-of-similarity calculation unit.