METHODS AND SYSTEMS FOR HANDLING DIGITAL RIGHTS MANAGEMENT

• US 20090013174A1
• Filed: 07/04/2007
• Published: 01/08/2009
• Est. Priority Date: 07/04/2007
• Status: Abandoned Application

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Sahlin, Orjan, Bjarlestam, Andreas, Foti, George, Hjelm, Johan, Hu, Yun Chao, Mitra, Nilo, Cheng, Yi
• Application Number:
  US11/773,424
• Publication Number:
  US 20090013174A1
• Time in Patent Office: Days
• US Class Current: 713/151
• CPC Class Codes: H04L 2463/101 applying security measures for digital rights management data processing systems or methods, specially adapted for commerce, e.g. marketing, shopping, billing, auctions or e-commerce G06Q30/00
• CPC Class Codes: H04L 63/10 for controlling access to devices or network resources
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 65/612 for unicast
• CPC Class Codes: H04L 67/14 Session management for real-time applications in data packet communications networks H04L65/1066
• CPC Class Codes: H04L 67/147 Signalling methods or messages providing extensions to protocols defined by standardisation

Abstract

Systems and methods according to the present invention address this need and others by providing methods and systems for translating media encrypted by various Digital Rights Management (DRM) techniques. This allows end user equipment to receive media in an IMS/IPTV environment when the end user equipment uses a DRM that is different from the media server which is providing the desired media in both unicast and multicast applications.

Claims

1. A method for communicating between media devices, comprising:

requesting media by initiating Session Initiation Protocol (SIP) signaling between said devices, wherein said SIP signaling includes a Session Description Protocol (SDP) which contains a parameter describing a type of Digital Rights Management (DRM) used by a requesting media device.

2. The method of claim 1, further comprising:

receiving said requested media which has been encrypted with a first type of DRM;

decrypting said requested media;

re-encrypting said requested media with a second type of DRM based upon said parameter; and

forwarding said re-encrypted, requested media to said requesting device.

3. The method of claim 1, further comprising:

changing an Internet Protocol (IP) address associated with said requesting media device in said SIP signaling to a different IP address based upon said parameter.

4. The method of claim 3, wherein said different IP address is an IP address of at least one device capable of translating media based upon said DRM types used by said devices.

5. The method of claim 1, wherein said media devices include a media server and a device associated with a media player.

6. A method for translating media based upon Digital Rights Management (DRM) type comprising:

receiving a Session Initiation Protocol (SIP) message requesting said media including a DRM type parameter; and

replacing a return IP address in said SIP message with an IP address associated with a decryption unit selected from a plurality of IP addresses.

7. The method of claim 6, further comprising:

receiving said requested media at said IP addresses;

decrypting said requested media;

re-encrypting said requested media with an encryption type based upon said DRM type parameter; and

forwarding said re-encrypted, requested media.

8. A communications node comprising:

a memory for storing information associated with a plurality of encryption and decryption units; and

a processor for controlling said plurality of encryption and decryption units,

wherein Session Initiation Protocol (SIP) signaling information is received by said node which contains Session Description Protocol (SDP) information that contains a parameter describing a Digital Rights Management (DRM) type associated with a device which is requesting media, further wherein said parameter is used by said processor to control at least one of said plurality of encryption and decryption units.

9. The communication node of claim 8, wherein said plurality of encryption and decryption units are each associated with a DRM type, and each associated with an IP address.

10. The communications node of claim 8, wherein said processor changes an Internet Protocol (IP) address associated with said requesting media device in said SIP signaling to a different IP address based upon said a DRM type associated with said requested media.

11. The communications node of claim 10, wherein said different IP address is an IP address of at least one of said decryption units.

12. The communications node of claim 9, wherein said node receives said requested media which has been encrypted with a first type of DRM and wherein:

one of said decryption units decrypts said requested media and routes said decrypted requested media to one of said encryption units;

said one of said encryption units re-encrypts said requested media with a second type of DRM based upon said parameter and forwards said re-encrypted, requested media to said requesting device.

13. The communications node of claim 8, wherein said device is a device associated with a media player.

14. The communications node of claim 13, wherein said device is a set-top box.

15. The communications node of claim 8, wherein said node is a DRM gateway.

16. A method for transmitting a broadcast from a node comprising:

receiving a media stream, at said node, which has been encrypted by a first type of Digital Rights Management (DRM);

decrypting said media stream;

re-encrypting said media stream into a plurality of different DRM types; and

transmitting a plurality of media streams wherein each of said media streams is encrypted with a different type of DRM.

17. The method of claim 16, wherein said broadcast is a multicast broadcast.

18. The method of claim 16, further comprising:

receiving one of said plurality of transmitted media streams by an end user based upon previously received metadata and the DRM of said end user.

19. The method of claim 18, wherein said metadata includes DRM types.

20. A communications node comprising:

a memory for storing information associated with a plurality of encryption and decryption units; and

a processor for controlling routing of media communications to said plurality of encryption and decryption units,

wherein one of said plurality of decryption units receives a media communication encrypted with a first Digital Rights Management (DRM) type, decrypts said media communication and transmits said decrypted media communication to said plurality of encryption units; and

said plurality of encryption units, wherein each of said plurality of encryption units that receives said decrypted media communication re-encrypts said decrypted media communication with a different DRM type and transmits said re-encrypted media communication.