METHOD AND SYSTEM FOR ACOUSTIC COMMUNICATION
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United States of America Patent
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May 25, 2017
app pub date -
Jun 19, 2015
filing date -
Jun 20, 2014
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Abstract
A transmitter device comprises a transmission antenna with at least one transducer and one signal generation unit for generating an acoustic communication signal to be transmitted to a receiver device including hidden information, wherein the signal generation unit is configured to previously record an original acoustic signal, the signal generation unit capable of generating the communication signal to be transmitted by adding, to an initial signal x(t) derived from the original signal, an auxiliary signal previously multiplied by at least one symbol, the symbol having a phase and/or an amplitude carrying the hidden information and the auxiliary signal calculated from the initial signal by a chosen transformation operator which depends on a steganographic key.
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