Patent ID: 7567686

Claim:
A method of analyzing an embedded media signal to extract a message information signal therefrom, wherein the embedded media signal includes registration symbols and variable message information symbols steganographically embedded therein, in which both the registration symbols and message information symbols are redundantly embedded in the embedded media signal, the variable message information symbols are associated with the message information signal, wherein embedding of a media signal comprises changes to data representing at least some sampled fragments of the media signal to thereby represent the registration symbols and variable message information symbols, said method comprising: utilizing a multi-purpose electronic processor configured for: detecting from the embedded media signal embedded code signals corresponding to the registration symbols and variable message information symbols; verifying detection of the embedded code signals corresponding to the registration symbols; and verifying detection of the variable message information symbols by checking correspondence of the values of the variable message information symbols relative to the registration symbols with an expected sequence of values, said multi-purpose electronic processor is configured for analyzing a plurality of fragments of the embedded media signal with greater or lesser confidence in an extracted message information signal being obtained by processing more or less fragments of the embedded media signal, respectively.