Enhanced audio data hiding synchronization using non linear filters

The paper addresses the problem of synchronization in the context of audio data hiding. For real time transmission purposes, the data decoding process has to deal with synchronization issues. The paper proposes an new synchronization scheme that optimizes the performances of systems which are based on spread spectrum synchronization by the use of mathematical morphological tools that present good performance for peak detection. A brief theoretical presentation of the top-hat filter is recalled and the enhanced system is derived from the analysis of the advantages and disadvantages. The final scheme provides a robust synchronization system and is compared with the classical solutions.