Digital watermarking with variable orientation and protocols
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United States of America Patent
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Jul 31, 2012
Grant Date -
Jan 29, 2009
app pub date -
Jun 24, 2008
filing date -
Dec 13, 2001
priority date (Note) -
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Abstract
A method of digital watermarking selects a mapping of a digital watermark to audio or video content and an embedding gain to produce uniquely watermarked copies for distribution. The embedding method is implemented at points of distribution, including content servers or receivers. By applying varying mapping protocols and random gain, the digital watermark uniquely serializes copies. It also has a structure and embedding configuration that minimizes the effectiveness of collusion, averaging and over-embedding attacks.
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