Authors:
Ehsan Jahangiri
and
Shahrokh Ghaemmaghami
Affiliation:
Electronics Research Center, Sharif University of Technology, Iran, Islamic Republic of
Keyword(s):
Data Hiding, Steganography, Encryption, Multi-band Speech Coding, MELP.
Related
Ontology
Subjects/Areas/Topics:
Authentication and Watermarking
;
Multimedia
;
Multimedia Systems and Applications
;
Telecommunications
Abstract:
One of the main issues with data hiding algorithms is capacity of data embedding. Most of data hiding methods suffer from low capacity that could make them inappropriate in certain hiding applications. This paper presents a high capacity data hiding method that uses encryption and the multi-band speech synthesis paradigm. In this method, an encrypted covert message is embedded in the unvoiced bands of the speech signal that leads to a high data hiding capacity of tens of kbps in a typical digital voice file transmission scheme. The proposed method yields a new standpoint in design of data hiding systems in the sense of three major, basically conflicting requirements in steganography, i.e. inaudibility, robustness, and data rate. The procedures to implement the method in both basic speech synthesis systems and in the standard mixed-excitation linear prediction (MELP) vocoder are also given in detail.