发明名称 |
Method of and apparatus for manipulating digital data works |
摘要 |
A method of hiding copyright related messages within digital data works is taught. The method relies on modifying data elements in the work according to certain rules which depend on the actual message itself. The information content of the message can be extracted through a comparison of measurable characteristics of defined portions of the modified work.
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申请公布号 |
US6272222(B1) |
申请公布日期 |
2001.08.07 |
申请号 |
US19970894825 |
申请日期 |
1997.10.24 |
申请人 |
HILTON DAVID |
发明人 |
HILTON DAVID |
分类号 |
H04N1/44;G06T1/00;G09C5/00;G11B20/10;H04N1/32;H04N1/387;(IPC1-7):G09C3/00 |
主分类号 |
H04N1/44 |
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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