Read-only recording medium containing sample data and reproducing method thereof

• US 20060294010A1
• Filed: 08/29/2006
• Published: 12/28/2006
• 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:
  US11/511,410
• Publication Number:
  US 20060294010A1
• Time in Patent Office: Days
• US Class Current: 705/50
• CPC Class Codes: G06Q 20/382 insuring higher security of transaction
• 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 20/00094 involving measures which result in a restriction to authorised record carriers
• CPC Class Codes: G11B 20/00115 wherein the record carrier stores a unique medium identifier
• CPC Class Codes: G11B 20/0021 involving encryption or decryption of contents recorded on or reproduced from a record carrier
• CPC Class Codes: G11B 20/00224 wherein the key is obtained from a remote server
• CPC Class Codes: G11B 20/00246 wherein the key is obtained from a local device, e.g. device key initially stored by the player or by the recorder
• 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 20/00673 wherein the erased or nullified data include a cryptographic key
• CPC Class Codes: G11B 20/0071 involving a purchase action
• CPC Class Codes: G11B 20/00818 wherein the usage restriction limits the signal quality, e.g. by low-pass filtering of audio signals or by reducing the resolution of video signals
• CPC Class Codes: G11B 20/00978 wherein the record carrier stores a trial version of a content
• CPC Class Codes: G11B 2220/213 Read-only discs
• CPC Class Codes: H04N 2005/91364 the video signal being scrambled
• CPC Class Codes: H04N 21/42646 for reading from or writing on a non-volatile solid state storage medium, e.g. DVD, CD-ROM
• CPC Class Codes: H04N 21/4622 Retrieving content or additional data from different sources, e.g. from a broadcast channel and the Internet web site content organization and management for information retrieval from the Internet G06F16/958; transmission by internet of broadcast information H04H60/82; stock exchange data over packet-switching network H04L12/1804; push services including data channel over packet-switching network H04L12/1859
• CPC Class Codes: H04N 21/63345 by transmitting keys key distribution for secret or secure communication H04L9/08; network support of key management H04L63/06
• CPC Class Codes: H04N 5/765 Interface circuits between an apparatus for recording and another apparatus
• CPC Class Codes: H04N 5/85 on discs or drums
• CPC Class Codes: H04N 5/913 for scrambling ; for copy protection
• CPC Class Codes: H04N 7/1675 : Providing digital key or authorisation information for generation or regeneration of the scrambling sequence pseudo-random number generators in general G06F7/58
• CPC Class Codes: H04N 9/8205 : involving the multiplexing of an additional signal and the colour video signal
• CPC Class Codes: H04N 9/8227 : the additional signal being at least another television signal

Abstract

The present invention provides according to an embodiment a method of reproducing content, comprising the steps of: (a) checking whether information required for decrypting an encrypted content is present; (b) requesting the information to an external source based on URL (Uniform Resource Locator) information if the information is not present; and (c) reproducing the encrypted content using the information.

Claims

1. A method of reproducing content, comprising:

(a) checking whether information required for decrypting an encrypted content is present;

(b) requesting the information to an external source based on URL (Uniform Resource Locator) information if the information is not present; and

(c) reproducing the encrypted content using the information.

2. The method of claim 1, wherein said step (b) requests the information to a web site that provides the information.

3. The method of claim 2, wherein said step (b) requests the information to the web site along with an identification information, wherein the identification information is unique to the content.

4. The method of claim 1, wherein said step (b) includes a step of downloading the requested information from the external source.

5. The method of claim 4, wherein the downloading step downloads the requested information in connection with an identification information.

6. The method of claim 4, wherein the downloading step downloads the requested information after payment for the information.

7. The method of claim 1, wherein said step (b) further requests a management information for managing the encrypted content to the external source, wherein the step (c) includes a step of controlling reproduction of the content based on the management information.

8. The method of claim 7, wherein the management information includes at least one of a start position, an end position and size information of the encrypted content.

9. The method of claim 1, wherein the encrypted content comprises a plurality of digital audios or videos, wherein the step (b) requests the information to the external source in order to decrypt at least one digital audio or video.

10. The method of claim 1, wherein the encrypted content comprises a plurality of digital audios or videos, wherein the step (b) requests the information to the external source in order to decrypt the plurality of audios or videos.

11. The method of claim 1, wherein the step (b) further comprises:

(b1) indicating a location of external source for obtaining the information if the information is not present; and

(b2) interfacing with the external source to obtain the information, based on the indicated location.

12. A method of reproducing content, comprising:

(a) checking whether control information for normally reproducing an encrypted content is present, wherein the control information including key information for decrypting the encrypted content and management information for managing the encrypted content;

(b) sending a signal to request the control information to an external source based on URL (Uniform Resource Locator) information if the control information is not present; and

(c) reproducing the encrypted content using the control information.

13. The method of claim 12, wherein the step (b) includes a step of receiving the requested information through interface with the external source.

14. The method of claim 12, wherein the step (b) includes a step of purchasing the requested information with charge.

15. The method of claim 12, wherein the step (c) comprises:

(c1) decrypting the encrypted content using the key information, and

(c2) playing the decrypted content based on the management information.

16. A method of transferring information, comprising:

(a) receiving a signal to request information from a requesting part, the information required for at least decrypting an encrypted content;

(b) identifying the requesting part based on an ID information associated with the requesting part; and

(c) determining whether to send the information to a requesting part based on ID information.

17. The method of claim 16, wherein the step (c) further determines whether to send the information to the requesting part based on an action for play-authority.

18. The method of claim 17, wherein the action includes a payment for the information.

19. The method of claim 16, wherein the information includes a management information to manage a reproduction of the content.

20. The method of claim 19, wherein the management information includes at least one of a start position, an end position and size information of the encrypted content.

21. The method of claim 16, wherein the encrypted content comprises a plurality of digital audios or videos, the information required for decrypting the plurality of audios or videos.

22. The method of claim 16, wherein the encrypted content comprises a plurality of digital audios or videos, the information required for decrypting at least one digital audio or video.

23. An apparatus for reproducing content, comprising:

a controller checking whether information required for decrypting an encrypted content is present, and requesting the information to an external source based on URL (Uniform Resource Locator) information if the information is not present; and

a reproducing unit reproducing the encrypted content based on a control of the controller.

24. The apparatus of claim 23, wherein the controller requests the information to a web site that provides the information.

25. The apparatus of claim 24, wherein the controller sends an identification information to external source with the signal to request the information, wherein the identification information is unique to the content.

26. The apparatus of claim 23, further comprising:

a memory for storing the requested information to be received from the external source.

27. The apparatus of claim 26, wherein the controller controls the memory to store the requested information in connection with an identification information.

28. The apparatus of claim 26, wherein the controller controls the memory to store the requested information after payment for the information.

29. The apparatus of claim 23, wherein the controller further requests a management information for managing the encrypted content to the external source, and controls the reproduction unit to reproduce the content based on the management information.

30. The apparatus of claim 29, wherein the management information includes at least one of a start position, an end position and size information of the encrypted content.

31. The apparatus of claim 23, wherein the encrypted content comprises a plurality of digital audios or videos, wherein the controller requests the information the external source in order to decrypt at least one digital audio or video.

32. The apparatus of claim 23, wherein the encrypted content comprises a plurality of digital audios or videos, wherein the controller requests the information to the external source in order to decrypt the plurality of audios or videos.

33. The apparatus of claim 23, further comprising:

a display unit indicating a location of external source for obtaining the information, wherein the controller controls an interface with the external source to obtain the information, based on the indicated location.