Robust Detection Of Audio Watermarks After Acoustic Path Transmission

This paper presents. an algorithm to improve the robustness of audio watermarks after acoustic path transmission. This includes a brief presentation of the variety of signal alterations a watermarked audio track undergo in such a scenario. After presenting the underlying audio watermarking algorithm, the involved effects with respect to the correlation based detection will be discussed. Based on this observations a new detection metric is introduced exploiting the multipath reception of the watermarked signal after acoustic path transmission. The new detection metric is based on determining the false positive probability, which is effectively computed via a recursive calculation algorithm during detection. The effectiveness of the presented detection method will be underlined by an exhaustive experimental evaluation.