发明名称 |
Watermark Synchronization System and Method for Embedding in Features Tolerant to Errors in Feature Estimates at Receiver |
摘要 |
The present invention is directed to a system that includes a signal feature estimator module configured to derive a plurality of signal feature estimate values from a received signal. An inner symbol alignment decoder is coupled to the signal feature estimator module. The inner symbol alignment decoder is configured to generate N probability vectors from the plurality of signal feature estimate values using a predetermined marker vector. N is an integer estimate of a number of symbols in a codeword corresponding to an watermark message that may or may not be embedded in the received signal. An outer soft-input error correction decoder is coupled to the inner decoder. The outer decoder performs a series computations and generates an estimated watermark message based on the N probability vectors. The watermark message is used to communicate data and/or to authenticate the received signal.
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申请公布号 |
US2007217626(A1) |
申请公布日期 |
2007.09.20 |
申请号 |
US20070687103 |
申请日期 |
2007.03.16 |
申请人 |
UNIVERSITY OF ROCHESTER |
发明人 |
SHARMA GAURAV;COUMOU DAVID J.;CELIK MEHMET |
分类号 |
G06F17/00 |
主分类号 |
G06F17/00 |
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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