Semi-fragile watermarking system for MPEG video authentication
First Claim
1. A method of providing digital watermarking of a digital media containing predetermined digital content, comprising the steps of:
- extracting at least one feature from said digital content;
constructing a first watermark component from said extracted feature;
constructing a second watermark component from said extracted feature;
embedding said first watermark component within said second watermark component to define a dual component watermark; and
embedding said dual component watermark in said digital content.
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Abstract
The semi-fragile watermark comprises a fragile watermark component and a robust watermark component. Features are extracted from the video stream and subsequent hashing and encryption processes are performed to generate the fragile watermark. The fragile watermark includes control data information at the block level as well as frame and group level information. The fragile watermark is added on top of the robust watermark, giving the system the ability to detect alteration at the block level as well as the group level. The resulting semi-fragile watermark has the advantage of being both sensitive to malicious attack while being robust enough to survive bit rate reduction and other types of manipulation typically performed on digital multimedia signals.
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Citations
18 Claims
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1. A method of providing digital watermarking of a digital media containing predetermined digital content, comprising the steps of:
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extracting at least one feature from said digital content;
constructing a first watermark component from said extracted feature;
constructing a second watermark component from said extracted feature;
embedding said first watermark component within said second watermark component to define a dual component watermark; and
embedding said dual component watermark in said digital content. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification