Speech Watermarking Technique Using the Finite Ridgelet Transform, Discrete Wavelet Transform, and Singular Value Decomposition

In this chapter, existing watermarking techniques for the speech signal and its various features are described. A new watermarking technique is composed of the finite ridgelet transform (FRT), discrete wavelet transform (DWT), and singular value decomposition (SVD). The security of the watermark information is provided using the Arnold scrambling technique. The encrypted watermark information is inserted into hybrid coefficients (singular values of approximation wavelet coefficients of ridgelet coefficients) of the speech signal using an additive watermarking approach. This technique is used for copyright protection of the speech signal over a communication channel.