Гано-Родригес Г., Накно-Мийатаке М., Перес-Меана Э.

In this paper, three principal audio watermarking schemes are analyzed and summarized. Each audio watermarking scheme was evaluated from the point of view of fidelity and robustness. In the fidelity case the signal to noise ratio (SNR) was used, on the other hand, the watermarked signals were evaluated under several different attacks. Among them the Stirmark for audio, that is a program specifically designed to remove watermarks, in order to prove their robustness. The audio watermarking schemes were classified in three categories: Patchwork, based in the frequency domain, which can be applied to all frequency transforms such as DCT, DFT and DWT, the echo hiding that is based in the time domain and the cepstrum domain.