关键词:音频水印; 小波变换; 能量比; 去同步攻击
Audio watermarking algorithm based on energy ratio in DWT domain
BAO Jin-fei, BAI Sen, ZHU Gui-bin, BAI Yu-bao
(Chongqing Communication Institute, Chongqing 400035, China)
Abstract:Based on DWT and amplitude modulation, using the auditory masking property, this paper proposed a novel audio watermarking algorithm with low complexity and high robustness . Through the way of calculating the average per-frame energy ratio of audio in different frame length before or after different kinds of attacks, and chose the best frame-length. In order to embed the secret information, changed the per-frame energy ratio through the way of modulate the amplitude of low frequency coefficients. Experimental results show that the watermarked audio has good imperceptibility and is robust against different kinds of attacks, such as low-pass filtering, noise adding, resampling, echo,A/μ law conversion,MP3 compression. It also can resist the attacks of desynchronizations. ......