| http://www.w3.org/ns/prov#value | - gnal from the stego signal, a modulator for modifying the received stego signal as a function of the replica signal of the received stego signal, and an extractor for extracting the auxiliary signal by filtering the modified received stego signal. [0017] The term cover signal as used hereinafter refers to a host or source signal, such as an audio, video or other information signal, which carries o
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