关键词: 音频水印, 小波变换, 倒谱, 模/数转换, AMR格式

Abstract: Based on wavelet decomposition and cepstrum technology, an audio watermarking algorithm was proposed in which the low-frequency wavelet coefficients were chosen for cepstrum transforming. The watermark was embedded into the audio carrier through the method of statistical mean calculation and modification. Experimental results show that the proposed algorithm can resist the attacks of A/D and D/A successfully with large capacity and zero bit error. Meanwhile, the approach can prevent against the AMR attack and it provides promising prospect for the secure broadcast and management of mobile audio.

Key words: audio watermarking, wavelet transform, cepstrum, A/D transform, AMR format