发明名称 |
Apparatus and method for fingerprinting digital media |
摘要 |
An apparatus for generating a fingerprint of a digital medium having a partial decoder for generating a partially decoded form of a compressed datastream, feature extractor for extracting at least one invariant feature from the partially decoded form, a fingerprint calculator for computing at least one fingerprint from the extracted invariant feature. An apparatus for authenticating fingerprints and methods for generating and authenticating fingerprints.
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申请公布号 |
US7110338(B2) |
申请公布日期 |
2006.09.19 |
申请号 |
US20020213900 |
申请日期 |
2002.08.06 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
CHENG SZEMING;YU HONG HEATHER |
分类号 |
G11B5/09;G06F21/00;G06K9/00;G06K9/36;G11B20/00;H04N5/913 |
主分类号 |
G11B5/09 |
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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