%0 Journal Article
%A CHEN Yao
%A HE Ning-ning
%A HU Cai-e
%A NIU Shao-zhang
%A XUE Yi-ming
%T Speech Hiding Algorithm Based on Mobile Circuit-Switched Domain
%D 2017
%R 10.13190/j.jbupt.2017-021
%J Journal of Beijing University of Posts and Telecommunications
%P 57-64
%V 40
%N 6
%X Based on analysis of circuit-switched mobile channels, an algorithm for speech information hiding was proposed, which is robust for the speech vocoder discontinuous transmission (DTX) mechanism and the lossy compression. The algorithm performs 3-level discrete wavelet transform decomposition on the voiced speech frames decided by voice activity detector, and selects the 3rd level detail coefficients to implement fast Fourier transform(FFT). By means of the auditory masking theory, the rational dither modulation is used to embed the secret data on FFT coefficients within the frequency band of 0.5~1 kHz. The experimental results show that the Perceptual evaluation of speech quality score of stego speech is higher than 3.48, and the bit error rate is about 0.06 under the interference of DTX of the global system for mobile communication enhanced full rate vocoder, the lossy compression and some other attacks in the channels.
%U https://journal.bupt.edu.cn/EN/10.13190/j.jbupt.2017-021