MULTI-STAGE WATERMARKING PROCESS AND SYSTEM

• US 20100002907A1
• Filed: 09/15/2009
• Published: 01/07/2010
• Est. Priority Date: 12/29/2000
• Status: Active Grant

• Current Assignee: ContentGuard Holdings, Inc. (Pendrell Corporation)
• Original Assignee: ContentGuard Holdings, Inc. (Pendrell Corporation)
• Inventors: WANG, Xin, Okamoto, Steve Atsushi, Ishigo, Nancy Lynn, Lear, Russell Robert
• Granted Patent: US 7,907,749 B2
• Time in Patent Office: Days
• US Class Current: 382/100
• CPC Class Codes: G06T 1/0021 Image watermarking
• CPC Class Codes: H04N 1/32149 Methods relating to embedding, encoding, decoding, detection or retrieval operations
• CPC Class Codes: H04N 1/32315 Selecting a particular method from amongst a plurality of methods
• CPC Class Codes: H04N 2201/3236 Details of authentication information generation

Abstract

A multi-stage watermarking system and process that creates a watermark specification which describes how to generate a watermark, generates a template specification which describes how to merge the watermark into a target document, generates the watermark based on the watermark specification, and merges the watermark into the target document based on the template specification to provide a watermarked document.

Claims

1. A method for creating a watermark in a target document at different stages of the target document life cycle, the method comprising:

scanning the target document containing a target watermark;

recovering the target watermark from the target document, the recovered target watermark indicating a template specification for describing how the watermark was merged into the target document;

generating an additional watermark according to a watermark specification;

updating the template specification by adding the watermark specification and associating the additional watermark with the watermark specification in the template specification; and

merging the generated watermark with the scanned target document.

2. The method of claim 1, wherein the template specification identifies at least one watermark specification and provides a mapping list of how the at least one watermark associated with at least one watermark specification is merged, the at least one watermark specification identifying a specific watermarking technology and a target object in which the watermark is generated.

3. The method of claim 1, wherein the additional watermark includes dynamic information pertaining to different stages of the life cycle of the target document.

4. The method of claim 1, wherein the target watermark has a dataglyph format indicating a form type associated with the template specification.

5. The method of claim 1, wherein the target document comprises audio or video.

6. The method of claim 1, further comprising removing the target watermark from the target document.

7. The method of claim 1, wherein the additional watermark is generated based on the target watermark.

8. A watermarking system comprising:

a target document including a target watermark;

a scan service for scanning the target document;

a watermark recovery module for recovering the target watermark from the scanned target document, the recovered target watermark indicating a template specification for describing how the watermark was merged into the target document; and

a watermark processing module for generating an additional watermark according to a watermark specification, the watermark processing module updating the template specification by adding the watermark specification and associating the additional watermark with the watermark specification in the template specification, the watermark processing module for merging the generated additional watermark with the scanned document.

9. The system of claim 8, wherein the template specification identifies at least one watermark specification and provides a mapping list of how the at least one watermark associated with at least one watermark specification is merged, the at least one watermark specification identifying a specific watermarking technology and a target object in which the watermark is generated.

10. The system of claim 8, wherein the additional watermark includes dynamic information pertaining to different stages of the life cycle of the target document.

11. The system of claim 8, wherein the target watermark has a dataglyph format indicating a form type associated with the template specification.

12. The system of claim 8, wherein the target document comprises audio or video.

13. The system of claim 8, the watermark processing module further removing the target watermark from the target document.

14. The system of claim 8, wherein the additional watermark is generated based on the target watermark.

15. The system of claim 8, wherein the watermark processing module is an image processing system.

16. A method for creating a watermark in a target document at different stages of the target document life cycle, the method comprising:

recovering a target watermark from the target document, the recovered target watermark indicating a template specification for describing how the watermark was merged into the target document;

generating an additional watermark according to a watermark specification;

updating the template specification by adding the watermark specification and associating the additional watermark with the watermark specification in the template specification; and

merging the generated watermark with the scanned target document.

17. The method of claim 16, wherein the template specification identifies at least one watermark specification and provides a mapping list of how the at least one watermark associated with at least one watermark specification is merged, the at least one watermark specification identifying a specific watermarking technology and a target object in which the watermark is generated.

18. The method of claim 16, wherein the additional watermark includes dynamic information pertaining to different stages of the life cycle of the target document.

19. The method of claim 16, further comprising removing the target watermark from the target document.

20. The method of claim 16, wherein the additional watermark is generated based on the target watermark.