Abstract:

Audio watermarking algorithm based on discrete wavelet transform (DWT) is proposed in this paper. The algorithm embedded watermarking by quantizing the lowest frequency coefficients of DWT of the digital audio signals so that it is more robust than the algorithms introduced previously. The idea of embedding synchronic signal which used the synchronic signal to search the watermark location was introduced. The experimental results indicate the algorithm is robust to many operations on digital audio signal, such as Guassyawp, lossy compression, requantization.

Key words: audio watermarking, discrete wavelet transform, synchronic signal, quantization