Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Audio compression


Data Hiding in Audio File by Modulating Amplitude

Loay. A. Jorj; Hilal H. Saleh; Nidaa F.Hassan

Engineering and Technology Journal, 2010, Volume 28, Issue 5, Pages 941-952

In this paper, two methods of a steganography are introduced for hiding
secret data in audio media file (.WAV). Hiding in audio becomes a challenging
discipline, since the Human Auditory System is extremely sensitive. The first
proposed method is used to embed binary sequence with high data rate by
modulating the amplitude of WAVE file. The embedding process utilizes the
amplitude modulation of the cover signal; the manipulation of the sample depends
on its previous sample and next sample. By using this hiding method, good hiding
rate is achieved, but it is noticed that the secret data produced by this method does
not resist the modifications produced compression. The second suggested hiding
methods are oriented to embed the secret data such that it is capable of surviving
against modifications produced by compression. This method exploits some of the
features of speech signal, more especially the features of the Voiced-Unvoiced
blocks. The second proposed hiding method is used to embed secret data by
modulating the amplitude of the voiced blocks of cover audio data. Hiding rate is
not high as first method since it hiddes only in voiced segments ,so it could survive
against compression.

Data Hiding in Sound Using Time Modulation of Unvoiced Blocks

Hilal H. Saleh; Loay A. Jorj; Nidaa F.Hassan

Engineering and Technology Journal, 2009, Volume 27, Issue 6, Pages 1184-1196

This paper is concerned with hiding secret data in audio media file (.WAV). When
performing data hiding in audio, one must exploit the weaknesses of Human Auditory System
(HAS), while at the same time being a ware of the extreme sensitivity of this system. This
hiding method is oriented to embed the secret data such that it is capable of surviving against
modifications produced by MP3 compression standard. Statistical and analytical
investigations are performed to assess the variations which may occur in the WAVE audio
when it is subjected to MP3 compression. Features of speech signal are exploited (Voiced-
Unvoiced segments) for embedding the secret data. Hiding is attempt by shortening or
elongating the unvoiced blocks of audio file (cover) data. To support the immunity of the
proposed hiding system, an encryption method is added to the proposed hiding system.