Importance

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Abstract

The invention relates to a method of embedding a watermark W in an information signal P, to a corresponding arrangement for embedding a watermark W in an information signal P, to an information signal with an embedded watermark, and to a storage medium 50 having stored thereon an information signal P with an embedded watermark W. The watermark is embedded in the information signal by deriving sub-patterns W.sub.i from said watermark pattern W, wherein the energy spectrum concentration of each sub-pattern W.sub.i has a dominent orientation. The local weight factors .lambda.(P) for said watermark sub-patterns W.sub.i are determined based on the local energy spectrum of the information signal P in said dominent orientation. Said watermark sub-patterns W.sub.i are locally weighted using said determined local weight factors .lambda.(P). Finally, the locally weighted watermark sub-patterns (W.sub.i) are added to the information signal P.

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First Claim