发明名称 |
Digital watermarking system using scrambling method |
摘要 |
An encoding apparatus that embeds a watermark in host data is provided. A multiplexer generates a plurality of bit sequences by adding initial data to the head of the watermark. A scrambler scrambles a plurality of the bit sequences respectively and generates a plurality of scrambled watermarks. An embedder embeds a plurality of the scrambled watermarks in the host data and generates a plurality of candidate watermarked host data. A signal-to-noise ratio calculator evaluates the robustness of the watermarks hidden in the respective candidate watermarked host data. A selector selects one candidate that has the highest level of the robustness as a final watermarked host data.
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申请公布号 |
US7487356(B2) |
申请公布日期 |
2009.02.03 |
申请号 |
US20030358227 |
申请日期 |
2003.02.05 |
申请人 |
SANYO ELECTRIC CO., LTD. |
发明人 |
KUNISA AKIOMI |
分类号 |
H04L9/00;G06K9/00;G06T1/00;H03D3/24;H04K1/02;H04N1/32;H04N1/387;H04N7/08;H04N7/081;H04N7/167;H04N7/26 |
主分类号 |
H04L9/00 |
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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