发明名称 |
Water-mark embedding method and system |
摘要 |
A data embedding method and apparatus and a data reproducing method and apparatus are provided which can apply a digital watermark to various contents. Instead of embedding watermarking information in respective pixels or by using a relation between pixels, the watermarking information is embedded as a position pattern of changed pixels in the contents. Reliability comparable with conventional techniques can be obtained irrespective of a change in a smaller number of pixels for the contents.
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申请公布号 |
US6728408(B1) |
申请公布日期 |
2004.04.27 |
申请号 |
US19980144467 |
申请日期 |
1998.09.01 |
申请人 |
HITACHI, LTD. |
发明人 |
ECHIZEN ISAO;YOSHIURA HIROSHI;NAKAMURA MASAFUMI;ARAI TAKAO;TAKEUCHI TOSHIFUMI |
分类号 |
H04N7/08;G06T1/00;H04N1/32;H04N1/387;H04N7/081;(IPC1-7):G06K9/00;G06K9/46;G06K9/32;H04L9/00 |
主分类号 |
H04N7/08 |
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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