APPARATUS AND METHOD FOR THE INSERTION AND EXTRACTION OF INFORMATION IN ANALOG SIGNALS THROUGH MODULATION OF REPLIES.

摘要

Method for inserting an auxiliary signal into an analog carrier signal, comprising the steps of: selecting at least a portion of said carrier signal in a predetermined domain according to a stego key; generation of a replica signal from said selected part of the carrier signal by modifying said selected part of said carrier signal according to the stego key; modification of said replica signal as a function of said auxiliary signal; and inserting the modified replica signal into said analog carrier signal.