APPARATUS AND METHOD FOR INSERTING/EXTRACTING NONBLIND WATERMARK USING FEATURES OF DIGITAL MEDIA DATA
First Claim
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1. An apparatus for inserting a nonblind watermark, comprising:
- a media database for storing one or more media data;
an additional information database for storing watermark-related information corresponding to each of the media data stored in the media database;
a watermark insertion module for, after host media data is determined from among the media data stored in the media database, searching the watermark-related information corresponding to the host media data from the additional information database, and inserting a watermark into the host media data according to the searched watermark-related information.
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Abstract
An apparatus and method for inserting/extracting a nonblind watermark using features of digital media data are provided. The apparatus and method inserts a watermark adaptively using watermark-related information determined by analyzing the characteristics of digital media data, also extracts features of the digital media data, automatically searches original media data corresponding to the features, and simultaneously and efficiently extracts a watermark using watermark-related information. Therefore, When the watermark is extracted, the original media data can be searched automatically.
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Citations
23 Claims
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1. An apparatus for inserting a nonblind watermark, comprising:
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a media database for storing one or more media data; an additional information database for storing watermark-related information corresponding to each of the media data stored in the media database; a watermark insertion module for, after host media data is determined from among the media data stored in the media database, searching the watermark-related information corresponding to the host media data from the additional information database, and inserting a watermark into the host media data according to the searched watermark-related information. - View Dependent Claims (2, 3, 4)
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5. An apparatus for extracting a nonblind watermark, comprising:
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a feature extraction module for extracting features from watermarked media data; a feature search module for searching corresponding original media data and watermark-related information using the extracted features; a watermark extraction module for extracting a watermark from the watermarked media data using the original media data and the watermark-related information searched by the feature search module. - View Dependent Claims (6, 7, 8, 9, 10)
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11. A method for inserting a nonblind watermark, comprising the steps of:
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determining host media data from among media data; searching watermark-related information corresponding to the determined host media data from an additional information database; inserting a watermark into the determined host media data at a watermark insertion module according to the searched watermark-related information. - View Dependent Claims (12, 13, 14)
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15. A method for extracting a nonblind watermark, comprising the steps of:
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extracting, at a feature extraction module, features from watermarked media data; searching, at a feature search module, original media data and watermark-related information corresponding to the extracted features using the extracted features; extracting, at a watermark extraction module, a watermark from the watermarked media data using the original media data and watermark-related information searched by the feature search module. - View Dependent Claims (16, 17, 18, 19)
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20. A method for constructing a watermark system, comprising the steps of:
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constructing a media database by storing one or more media data; constructing a feature database by extracting the features of each of the media data stored in the media database; storing, in an additional information database, watermark-related information including a watermarking method, watermark data, a watermark insertion position, and watermark intensity determined by analyzing each of the media data stored in the media database; linking the extracted features of the feature database corresponding to each of the media data of the media database and the watermark-related information of the additional information database through index values. - View Dependent Claims (21, 22, 23)
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Specification