Method and arrangement for embedding a watermark in an information signal
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...
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| Main Authors | , |
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| Format | Patent |
| Language | English |
| Published |
04.07.2002
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| Online Access | Get full text |
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| Summary: | 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
i
from said watermark pattern W, wherein the energy spectrum concentration of each sub-pattern W
i
has a dominent orientation. The local weight factors (P) for said watermark sub-patterns W
i
are determined based on the local energy spectrum of the information signal P in said dominent orientation. Said watermark sub-patterns W
i
are locally weighted using said determined local weight factors (P). Finally, the locally weighted watermark sub-patterns (W
i
) are added to the information signal P. |
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