Method and apparatus for analog insertion of low frequency watermarks
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United States of America Patent
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Jul 13, 2010
Grant Date -
Dec 2, 2004
app pub date -
May 28, 2004
filing date -
May 29, 2003
priority date (Note) -
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Abstract
A method and apparatus for inserting a watermark onto an illuminated image sequence. A light modulator modulates a light source. A controller controls the light modulator such that a low frequency watermark is inserted onto the illuminated image sequence.
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