Multilevel adaptive wavelet BCH code method for copyright protection in audio watermarking system

摘要

Audio watermarking is used as a tool to avoid the illegal manipulation of audio products. In this research, we proposed the audio watermarking system with adaptive BCH code multilevel wavelet method. We use three types of BCH codes: 15,11,1; 15,7,2; and 15,5,3. Our work show that the perceptual quality, robustness and watermark security are varies to the type of BCH codes. At quantization spacing of 0.1, ODG values can reach -0.7 for BCH code 15,11,1 and -1 for BCH code 15,5,3 in the LPF attack. Meanwhile SNR values can reach 32.7 dB for BCH code 15,11,1 and 29.8 dB for BCH 15,5,3 in the LPF attack. The last, BER value of BCH code 15,5,3 can reach zero as fastest as in 0.01 quantization spacing when our audio watermarking system is attacked by noise.