A Speech Scrambler Algorithm Based on chaotic system
Saad Najim AlSaad · Al-Mustansiriyah Journal of Sciences · 2013
This paper presents a secure scramble speech signal algorithm. The algorithm composed of two types of permutations. The first permutation key is generated from two logistic maps to permute the coefficients resulting from Discrete Wavelet Transform (DWT). The second permutation is generated from performing two dimensional chaotic map using Arnold cat map. Simulation results presented in the paper indicate that the algorithm provides scrambled speech of low residual intelligibility and good quality recovered speech.