Audio steganography by using of linear predictive coding analysis in the safe places of discrete wavelet transform domain

Steganography is one of the important methods for encryption of secret messages in secure purposes. Although several methods have been proposed, most of them have poor performance in encrypting the secret messages especially in presence of environmental noises, so that enemy can easily detect the secret message in the transmitted information. In this paper a new method for audio steganography is proposed. We propose an algorithm to encrypt the secret message by transforming it to LPC coefficients and noise term and then substituting it in safe places in discrete wavelet transform (DWT) as a cover message frames in the transmitted data. Moreover, we apply our method to some audio files from TIMIT database. Simulations results show good performance of our proposed system and large security and capacity of steganography toward previous methods especially in presence of environmental noises.