Implementation of Wavelet Transform-Based Speech Information Hiding

MATLAB source code implementing speech information hiding using wavelet transform. The algorithm applies 3-level wavelet decomposition to both original speech and watermark signals, then embeds the watermark's low-frequency components into selective high-frequency bands of the original speech. The implementation includes embedding procedures plus robustness testing against random noise, resampling, and compression attacks. Well-commented and structured code with clear technical documentation.