Audio Watermarking with White Noise Addition

This white noise-based audio watermarking program employs a 3-level wavelet decomposition technique. The decomposition method enables embedding random sequences into the audio's low-frequency coefficients. This approach ensures audio quality remains unaffected while providing effective copyright protection and traceability capabilities. By embedding white noise watermarks, the system effectively safeguards audio intellectual property rights and prevents unauthorized copying and distribution. This technology holds significant application potential in the field of audio copyright protection. Implementation involves using wavelet transform functions (like wavedec in MATLAB) for decomposition, processing approximate coefficients at level 3, and embedding pseudo-random sequences using quantization index modulation. The algorithm maintains imperceptibility by modifying only selected coefficient ranges while preserving perceptual audio quality through proper coefficient selection and embedding strength control.