发明名称 |
Z-transform implementation of digital watermarks |
摘要 |
Z-transform calculations may be used to encode (and/or decode) carrier signal independent data (e.g., digital watermarks) to a digital sample stream. Deterministic and non-deterministic components of a digital sample stream signal may be analyzed for the purposes of encoding carrier signal independent data to the digital sample stream. The carrier signal independent data may be encoded in a manner such that it is restricted or concentrated primarily in the non-deterministic signal components of the carrier signal. The signal components can include a discrete series of digital samples and/or a discreet series of carrier frequency sub-bands of the carrier signal. Z-transform calculations may be used to measure a desirability of particular locations and a sample stream in which to encode the carrier signal independent data.
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申请公布号 |
US6853726(B1) |
申请公布日期 |
2005.02.08 |
申请号 |
US19990456319 |
申请日期 |
1999.12.08 |
申请人 |
WISTARIA TRADING, INC. |
发明人 |
MOSKOWITZ SCOTT A.;COOPERMAN MARC |
分类号 |
G06T1/00;H04L29/06;H04N1/32;H04N7/26;(IPC1-7):H04K1/00;H04L9/00 |
主分类号 |
G06T1/00 |
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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