Watermarking
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United States of America Patent
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Dec 19, 2006
Grant Date -
Jan 2, 2003
app pub date -
May 6, 2002
filing date -
May 8, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
methods of embedding and detecting a watermark in an information signal (x(n), y'(n)) which are robust against sampling rate conversions of the watermarked signal (y(n)) adapts frame lengths used by an embedder and the detector, respectively, so as to preserve a constant ratio between the respective sampling rate and frame length. The frame lengths may be calculated from a greatest common divisor of a set of sampling rates providing watermarks which are robust against sampling rate conversions between any sampling rates of the set of sampling rates.
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