| 发明名称 |
Digital watermark with variable location |
| 摘要 |
A digital watermark in a data file occurs at multiple locations within the file. The location of each digital watermark, other than a first digital watermark, is specified by a previous digital watermark, or by other auxiliary information in a same logical block as a previous digital watermark.
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| 申请公布号 |
US7636440(B2) |
申请公布日期 |
2009.12.22 |
| 申请号 |
US20030355422 |
申请日期 |
2003.01.31 |
| 申请人 |
HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. |
发明人 |
WEIRAUCH CHARLES R. |
| 分类号 |
G06F12/14;H04N7/167;G06T1/00;G09C1/00;H04L9/32;H04N1/32;H04N1/387;H04N5/913;H04N7/08;H04N7/081;H04N7/24;H04N7/26 |
主分类号 |
G06F12/14 |
| 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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