Method of recording and reproducing sample data to/from a recording medium and sample data containing recording medium

• US 20080162359A1
• Filed: 02/21/2008
• Published: 07/03/2008
• Est. Priority Date: 03/13/2001
• Status: Abandoned Application

• Current Assignee: Byung Jin Kim, Hyung Sun Kim
• Original Assignee: Byung Jin Kim, Hyung Sun Kim
• Inventors: Kim, Byung Jin, Kim, Hyung Sun
• Application Number:
  US12/071,477
• Publication Number:
  US 20080162359A1
• Time in Patent Office: Days
• US Class Current: 705/57
• 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: G06F 2221/2119 Authenticating web pages, e.g. with suspicious links
• CPC Class Codes: G06Q 30/06 Buying, selling or leasing transactions
• 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 20/0071 involving a purchase action
• CPC Class Codes: G11B 20/00978 wherein the record carrier stores a trial version of a content
• CPC Class Codes: G11B 20/1217 on discs
• CPC Class Codes: G11B 2220/2562 DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs

Abstract

The present invention provides according to an embodiment a method of reproducing content, comprising the steps of: (a) receiving a digital content from an external source, the digital content protected by Digital Right Management (DRM) information, the DRM information authorizing a reproduction of the digital content; (b) requesting the DRM information to an external source based on URL (Uniform Resource Locator) information in order to normally reproduce the digital content; and (c) reproducing the digital content based on the DRM information.

Claims

1. A method of reproducing digital content protected by Digital Right Management (DRM) information authorizing a reproduction of the digital content, comprising:

determining whether sample data corresponding to the digital content is present based on first indication information indicating a presence of the sample data, wherein the sample data is associated with encrypted digital data and is not protected;

if the sample data is determined to be present, reading second indication information corresponding to attribute information of the sample data; and

reproducing the sample data based on the second indication information without considering the DRM information, wherein

the first indication information is inserted into an information field referring to the digital content, and

the second indication information includes at least one of location information, identification information and management information.

2. The method of claim 1, wherein

the location information includes at least one of sample data starting location information and sample data ending location information,

the identification information is based on one of device identifying information and contents identifying information, and

the management information includes navigation data.

3. The method of claim 1, wherein the identification information indicates a duration of the sample data.

4. The method of claim 1, wherein

the sample data comprises a plurality of portions associated with the corresponding portions of digital content, and

the step of reading second indication information includes reading identification information corresponding to each of the plurality of portions.

5. An apparatus for reproducing digital content protected by Digital Right Management (DRM) information authorizing a reproduction of the digital content, comprising:

a controller configured to

determine whether sample data corresponding to the digital content is present based on first indication information indicating a presence of the sample data, wherein the sample data is associated with encrypted digital data and is not protected;

if the sample data is determined to be present, read second indication information corresponding to attribute information of the sample data; and

reproduce the sample data based on the second indication information without considering the DRM information, wherein

the first indication information is inserted into an information field referring to the digital content, and

the second indication information includes one of location information, identification information and management information.

6. The apparatus of claim 5, further comprising a memory configured to store one of the first and the second indication information.

7. The apparatus of claim 5, wherein

the location information includes at least one of sample data starting location information and sample data ending location information,

the identification information is based on one of device identifying information and contents identifying information, and

the management information includes navigation data.

8. The apparatus of claim 5, wherein the identification information indicates a duration of the sample data.

9. The apparatus of claim 5, wherein

the sample data comprises a plurality of portions associated with the corresponding portions of digital content, and

the controller is configured to read identification information corresponding to the plurality of portions.

10. A computer readable storage medium having a data structure, comprising:

digital content protected by Digital Right Management (DRM) information authorizing a reproduction of the digital content;

sample data associated with the digital content and not protected by the DRM information;

first indication information indicating a presence of the sample data; and

second indication information corresponding to attribute information of the sample data, wherein

the first indication information is inserted into an information field referring to the digital content, and

the second indication information includes at least one of location information, identification information and management information.

11. The computer readable storage medium of claim 10, wherein

the location information includes at least one of sample data starting location information and sample data ending location information,

the identification information is based on one of device identifying information and contents identifying information, and

the management information includes navigation data.

12. The computer readable storage medium of claim 10, wherein the identification information indicates a duration of the sample data.