发明名称 |
Method of embedding a digital watermark in a useful signal |
摘要 |
Method of embedding a digital watermark in a useful signal, wherein a watermark bit sequence is embedded into the frequency domain of the useful signal using adaptive frequency modulation of two given frequencies by tracking amplitudes of the chosen frequencies of the original signal and modifying them according to the current bit of watermark bit sequence.
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申请公布号 |
US8300820(B2) |
申请公布日期 |
2012.10.30 |
申请号 |
US20060814296 |
申请日期 |
2006.01.16 |
申请人 |
RHEIN HANSPETER;UNLIMITED MEDIA GMBH |
发明人 |
RHEIN HANSPETER |
分类号 |
H04K1/02;G10L19/00;G10L19/018 |
主分类号 |
H04K1/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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