Adaptive Speech Watermarking in Wavelet Domain based on Logarithm

Mehdi Fallahpour, David Megias, Hossein Najaf-Zadeh

2012

Abstract

Considering the fact that the human auditory system requires more precision at low amplitudes, the use of a logarithmic quantization algorithm is an appropriate design strategy. Logarithmic quantization is used for the approximation coefficients of a wavelet transform to embed the secret bits. To improve robustness, the approximation coefficients are packed into frames and each secret bit is embedded into a frame. The experimental results show that the distortion caused by the embedding algorithm is adjustable and lower than that introduced by a standard ITU-T G.723.1 codec. Therefore, the marked signal has high quality (PESQ-MOS score around 4.0) and the watermarking scheme is transparent. The capacity is adjustable and ranges from very low bit-rates to 4000 bits per second. The scheme is shown to be robust against different attacks such as ITU-T G.711 (a-law and u-law companding), amplification and low-pass RC filters.

Paper Citation

in Harvard Style

Fallahpour M., Megias D. and Najaf-Zadeh H. (2012). Adaptive Speech Watermarking in Wavelet Domain based on Logarithm . In Proceedings of the International Conference on Security and Cryptography - Volume 1: SECRYPT, (ICETE 2012) ISBN 978-989-8565-24-2, pages 412-415. DOI: 10.5220/0004091704120415

in Bibtex Style

@conference{secrypt12,
author={Mehdi Fallahpour and David Megias and Hossein Najaf-Zadeh},
title={Adaptive Speech Watermarking in Wavelet Domain based on Logarithm},
booktitle={Proceedings of the International Conference on Security and Cryptography - Volume 1: SECRYPT, (ICETE 2012)},
year={2012},
pages={412-415},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0004091704120415},
isbn={978-989-8565-24-2},
}

in EndNote Style

TY - CONF
JO - Proceedings of the International Conference on Security and Cryptography - Volume 1: SECRYPT, (ICETE 2012)
TI - Adaptive Speech Watermarking in Wavelet Domain based on Logarithm
SN - 978-989-8565-24-2
AU - Fallahpour M.
AU - Megias D.
AU - Najaf-Zadeh H.
PY - 2012
SP - 412
EP - 415
DO - 10.5220/0004091704120415