Proprietary watermark system for secure digital media and content distribution

• US 7,760,904 B2
• Filed: 05/02/2006
• Issued: 07/20/2010
• Est. Priority Date: 02/21/2001
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Ivanov, Igor O., Kuzmich, Vsevolod M.
• Primary Examiner(s): PERUNGAVOOR, SATHYANARAYA V
• Application Number:
  US11/415,120
• Publication Number:
  US 20060193492A1
• Time in Patent Office: 1,540 Days
• Field of Search: 382/100
• US Class Current: 382/100
• CPC Class Codes: G06T 1/0021 Image watermarking
• CPC Class Codes: G06T 2201/0051 Embedding of the watermark in the spatial domain
• CPC Class Codes: G06T 2201/0052 Embedding of the watermark in the frequency domain

Abstract

A method of generating a protected digital media content, is provided. According to an embodiment of the present invention, the method includes generating a protected digital media content, comprising: generating a first control signal for use in an authorization signature of digital media content, generating a second control signal for use in a certification of the content owner'"'"'s right, and generating information about the digital media content; and adding the first control signal, the second control signal, and the information to the digital media content to provide a protected content.

Claims

1. A computer implemented method of generating digital media content, comprising:

generating a first control signal by using a first key of a content owner, the first control signal being for use in an authorization signature of the content owner;

embedding the first control signal into the digital media content;

generating a second control signal by using a second key of the content owner, the second signal being for use in a certification of the content owner'"'"'s right;

embedding the second control signal into the digital media content;

generating content information including additional information related to the digital media content;

embedding the content information into the digital media content;

generating a third control signal by using a public key of the content distributor, the third control signal being for use in a certification of the content distributor; and

embedding the third control signal into the digital media content.

2. The method of claim 1, wherein the first key is a secret key of the content owner.

3. The method of claim 1, wherein the first control signal is generated based on a symmetric cryptography.

4. The method of claim 1, wherein the second key is a public key of the content owner.

5. The method of claim 1, wherein the content information represents content properties.

6. The method of claim 1, further comprising:

transmitting the digital media content from the first device to a content distributor of the digital media content.

7. A computer implemented method of reproducing digital media content, comprising:

checking an authorization signature of a content owner by using a first control signal embedded into the digital media content, the first control signal being generated with a secret key of the content owner;

checking a certification of the content owner'"'"'s right by using a second control signal embedded into the digital media content, the second control signal being generated with a public key of the content owner;

identifying content information embedded into the digital media content to reproduce the digital media content, the content information including additional information related to the digital media content;

reproducing the digital media content when the authorization signature of the content owner and the certification of the content owner'"'"'s right are confirmed;

checking a certification of a content distributor by using a third control signal embedded into the digital media content, the third control signal being generated with a public key of the content distributor; and

reproducing the digital media content when the certification of the content distributor is confirmed.