Audio Watermarking for Covert Communication through Telephone System

Author

Tavakoli, Ehsan ; Vahdat, Bijan Vosoughi ; Shamsollahi, Mohammad Bagher ; Sameni, Reza

Author_Institution

Biomedical Signal and Image Processing Laboratory (BiSIPL), School of Electrical Engineering, Sharif University of Technology, Tehran, Iran. tavakoliehsan@yahoo.com

fYear

2006

fDate

Aug. 2006

Firstpage

955

Lastpage

959

Abstract

In this paper, a novel sewice that uses audio watermarking for covert communication through telephone system is presented. This system is suitable for ISDN and PSTN networks and it can be modified for using in mobile systems. We use a Direct sequence spread spectrum algorithm with perceptual modeling of HAS for embedding watermark into the audio or speech signals. The watermark is robust against telephone channel attacks such as AWGN, Low pass filtering, DIA-A/D conversion, Downsampling down to 64 kbps and A-Law or pLaw conversion. This system is also robust against audio format conversion such as wave (windows PCM) format to mp3 (down to 64 kbps) compression.

Keywords

AWGN; Filtering; ISDN; Low pass filters; Mobile communication; Robustness; Speech; Spread spectrum communication; Telephony; Watermarking; Audio watermarking; BPSK and Perceptual masking; Direct sequence spread spectrum; PSTN;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing and Information Technology, 2006 IEEE International Symposium on

Conference_Location

Vancouver, BC, Canada

Print_ISBN

0-7803-9753-3

Electronic_ISBN

0-7803-9754-1

Type

conf

DOI

10.1109/ISSPIT.2006.270935

Filename

4042377