Watermarking
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United States of America Patent
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Issued Date -
Dec 5, 2002
app pub date -
May 6, 2002
filing date -
May 8, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Disclosed is a non-frame-based method and an arrangement for embedding a watermark in an information signal (x(n)), e.g. an audio signal. The method comprises calculating (101) a non-cyclic convolution of the information signal with a watermark signal (v(n)) and combining (102) the convolution with the information signal. The non-cyclic convolution may be calculated by overlapped Fast Fourier transform filtering.
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