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This paper proposes a technique based on CDMA
and multilevel coding in order to achieve a high capacity
watermarking scheme. The bits of watermark are grouped
together and for each sequence a different modulation coefficient
is used. Using the wavelet transform domain for embedding
watermarks offers many advantages including robustness against
intentional and unintentional attacks. The proposed algorithm
results in low computational demands while maintains the same
high accuracy achieved by other approaches.
Index Terms: Watermarking, Digital copyright, M-ary modulation, Embedding capacity.
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Luigi Rosa,
“High Capacity Wavelet Watermarking Using CDMA Multilevel Codes”,
June 2009.
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