A Scheme of Transparent Speech Information Hiding Based on Fractional Fourier Transform
Ji Xi, Zhao Li, Liang Ruiyu - · International Journal of Advancements in Computing Technology · 2011
With the rapid development of network and multimedia techniques, speech information hiding has been given extensive attentions. In this paper, a novel scheme of speech information hiding based on the fractional Fourier transform is proposed, which combines the characteristics of fractional Fourier transform and time-frequency masking effect of human auditory system. Theoretical analysis and experimental results show that the proposed scheme improves the security of traditional scheme through mapping a security key to the transforming factor a of fractional Fourier transform. At the same time, the robustness against noise is slightly better than traditional echo hiding scheme.