The use of wet paper codes with audio watermarking based on echo hiding

We consider an audio watermarking technique based on echo hiding that provides both a very high quality of audio signals just after embedding of some hidden messages and robustness of their extraction under the condition of natural signal transforms. The technique of cepstrum analysis is used for hidden message extraction along with its parameter optimization. Since the extracted bit error probability is kept still significant for an acceptable sound fidelity and embedding rate, we propose to use wet paper codes to reduce the error probability to zero at the cost of a very negligible embedding rate degradation.