发明名称 |
Reproduction equipment, reproduction equipment specifying equipment, reproduction equipment specifying system and methods and recording media for said equipment and system |
摘要 |
A reproduction equipment converts an identification code of the reproduction equipment into a plurality of signal sequences using a correspondence table and embeds the obtained plurality of signal sequences in AV signals as a digital watermark. A reproduction equipment specifying equipment compares correlation values of the AV signals, containing the digital watermark embedded therein with all signal sequences contained in a correspondence table. A comparison of the correlation values with a previously set threshold value determines the embedded signal sequences and the identification code of the reproduction equipment which may be extracted.
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申请公布号 |
US7142692(B2) |
申请公布日期 |
2006.11.28 |
申请号 |
US20010941931 |
申请日期 |
2001.08.29 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
ARIMURA KOJI;INOUE HISASHI;NORIDOMI KENICHI;KATSURA TAKASHI;KADONO SHINYA;NAKAMURA KAZUHIKO |
分类号 |
G06K9/00;H04N5/913;H04N7/16;H04N7/167 |
主分类号 |
G06K9/00 |
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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