Audio Covering Signal For Speech Signal Hiding

The demands for exchange secret information among many institutions simulate the rapid development of new strategies. Steganography is a well-known method for hiding data from not permitted access. One of the Steganographic techniques is to hide secret data in one of the file formats such as image, text, audio. In this paper, a steganography technique based on the energy of the audio signal that is used to hide a speech signal is presented. The objective is to examine the effect of the energy parameter in hiding the speech signal within an audio signal without being perceptible by the listener. A technique is to test the different level of energies and durations of both the source and the cover signal. Experimental results show that, in the case of cleaned signals, the technique performing well in the case when the duration of the cover signal is much longer than the duration of the source signal, i.e. the much rooms for the source signal to hide the better performance. Also, the results show that the additive noise can have a tremendous negative impact on system performance.