Abstract:

For the problem that most audio information hiding algorithm can't resist the mobile communication system coding,a new audio information hiding algorithm that can be used in GSM was proposed using the features that before and after RPE-LTP coding adjacent phonemes energy value ratio remained essentially the same,and according to the masking effect of human auditory system,selected the high energy speech segment adaptively to hide information.The experimental results show that,the algorithm has better robustness to the conventional type of attack,especially has very strong resistance for the GSM speech coding system;algorithm has excellent safety for using Logistic sequence to encrypt the secret date;the SNR of the voice carrying secret date is higher,so the algorithm has good transparency.

Key words: information hiding;masking effect;logistic sequence;energy value ratio