发明授权
- 专利标题： Authentication of physical and electronic media objects using digital watermarks
- 专利标题（中）： 使用数字水印认证物理和电子媒体对象
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申请号： US12207211申请日： 2008-09-09
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公开(公告)号： US07822225B2公开(公告)日： 2010-10-26
- 发明人: Adnan M. Alattar
- 申请人： Adnan M. Alattar
- 申请人地址： US OR Beaverton
- 专利权人： Digimarc Corporation
- 当前专利权人： Digimarc Corporation
- 当前专利权人地址： US OR Beaverton
- 主分类号： H04N1/00
- IPC分类号： H04N1/00
摘要：
A content watermarking method derives a watermark key from data representing content. In one particular method, a plural symbol message is algorithmically transformed in dependence on the derived watermark key. In another arrangement, the key specifies how or where the message is embedded in the content. A variety of other features and arrangements are also detailed.
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