Inserting watermarks into portions of digital signals
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United States of America Patent
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May 22, 2012
Grant Date -
Oct 6, 2011
app pub date -
Apr 12, 2011
filing date -
Nov 18, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates generally to watermarking. In one implementation a method of pre-analyzing a digital signal for encoding digital watermarks using a digital filter comprising determining what changes in the digital signal will be affected by the digital filter is provided. In another implementation a system for pre-analyzing a digital signal for encoding at least one digital watermark using a digital filter is provided. The method includes a processor for identifying an area of the digital signal that will be affected by the digital filter; and an encoder for encoding the at least one digital watermark in the digital signal, the encoder encoding the at least one digital watermark so as to avoid the at least one area of the digital signal that will be affected by the digital filter. Other implementations are provided as well.
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