Spread-spectrum Audio Watermarking Algorithm in DCT Domain Based on Convolutional Codes

In order to enhance robustness,with the help of convolutional idea,the adaptive audio watermarking algorithm is investigated in DCT domain in this paper.The improved detecting algorithm which uses Viterbi soft-decision is presented,and the watermark detecting does not need the original audio.Experimental results show that the proposed algorithm is provided with h igh robustness,and can resist signal processing manipulation attacks such as MP3 compression algorithm.