Watermarking an information signal

专利名称：Watermarking an information signal发明人：Johan P.M.G. Linnartz申请号：US10418585申请日：20030418

公开号：US20030194108A1公开日：20031016

专利附图：

摘要：A method and an arrangement for detecting a multi-bit watermark in a signal(e.g. a video image) are disclosed. Each bit of the multi-bit value is represented by anembedded watermark subpattern in the signal. Instead of detecting in a conventionalmanner the presence of each individual subpattern (i.e. detecting each individual bit), the

detection comprises the steps of: detecting () the presence of the full watermark in thesignal irrespective of its multi-bit value, and detecting () to which extent the presence ofsubpatterns corresponds with the multi-bit value to be checked. The reliability ofwatermark detection is hereby improved.

申请人：LINNARTZ JOHAN P.M.G.

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