期刊名称：International Journal of Computer Science Issues
印刷版ISSN：1694-0784
电子版ISSN：1694-0814
出版年度：2013
卷号：10
期号：4
出版社：IJCSI Press
摘要：A secure exchange of information is the need of todays digital world, achieved by either changing the shape of information according to a predefined key using cryptography or concealing the information in a cover media, in spatial or transform domain, using Stegnography. The hiding data in various least significant bits of DCT coefficients of an audio cover file is the subject of this work. This paper statistically analyze the effect of different number of least significant bits (LSB) on Stego audio in terms of signal to noise ratio (SNR), peak signal to noise ratio (PSNR), mean square error (MSE) and data hiding capacity. The hiding capacity increases significantly with the increase in the number of least significant bit substituted with information bits and results in a very insignificant variation in SNR, PSNR and MSE. The statistical analysis shows that audio Stegnography in DCT domain is subjected to more distortion at lower hiding capacity and is subject to almost the same distortion for large data hiding capacity.
关键词：Audio Stegnography; Discrete Cosine Transform; Watermarking; Information Security; Steganalysis
