【摘要】 提出一种可抵抗MP3编码的音频水印方案。此方案对原始的PCM音频进行部分MP3编码,通过调整相邻的一对量化MDCT系数的大小关系嵌入水印信息,然后进行局部MP3解码得到含水印的PCM信号。水印提取时不需原始信号,只要依次比较相应频带中相邻的一对MDCT系数的大小即可。由于水印算法考虑到MP3编码的性质,所以对MP3有优良的稳健性。实验表明该水印方案在隐蔽性和嵌入量方面也有很好的性能。更多还原

【Abstract】 An audio watermarking scheme based on partial MP3 encoding is proposed. The original PCM signal is first undergone a partial MP3 encoding to produce quantized MDCT coefficients. An appropriate band in the count1 region, in which magnitude of any quantized MDCT coefficient is either 1 or 0, is chosen for data embedding. Each pair of the quantized MDCT coefficients is used to hide 1 bit. After modification of the coefficients, partial decoder is performed to return to the PCM domain. As the algorithm has taken account the characteristics of MP3 encoding, it is robust against MP3. The method also has good inaudibility and large embedding capacity.更多还原