METHOD FOR EMBEDDING DESIRED WATERMARK IN COVER WORK, METHOD FOR ENCODING THE SAME, DEVICE FOR EMBEDDING THE SAME AND RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To achieve informed coding of a watermark message including the definition of a code presented by a plurality of different code words in each of messages, the identification of the set of the code words presenting the prescribed message and embedding of the code words into the set to minimize the distortion of a cover work.

SOLUTION: A watermark message embedded in a cover work can be made robust to various types of post-embedding operations, while simultaneously minimizing perceptual impact on the cover work. This is accomplished by the informed coding of the watermark message to be embedded. This is also accomplished by the informed embedding of the watermark message code in the cover work. Finally, the watermark message code may be perceptually shaped to minimize impact on the fidelity of the watermarked work. Further, these techniques may be combined for maximum effect.

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