Genetic Content-Based MP3 Audio Watermarking in MDCT Domain
Genetic Content-Based MP3 Audio Watermarking in MDCT Domain
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发表时间：
2007-12
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通讯作者：
N. Moghadam;H. Sadeghi
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作者：
N. Moghadam;H. Sadeghi
- 提出了一种在MPEG-1 Layer III压缩过程中对数字音频进行水印嵌入的新方法。为此，我们稍微修改一些选定的MDCT系数，这是在MPEG音频压缩过程中使用。由于修改不同MDCT系数的可能性，考虑到鲁棒性和透明性因素，将存在用于将水印嵌入到音频数据中的不同选择。我们提出的方法使用遗传算法来选择最好的系数嵌入水印。这种遗传选择是根据从音频的感知内容中提取的参数进行的，以优化水印的鲁棒性和透明度。另一方面，由于遗传选择的随机性质，水印安全性增加。携带水印比特的所选MDCT系数的信息被保存在数据库中以供将来提取水印。该方法适用于在线MP3商店追踪音乐艺术品的非法拷贝。实验结果表明，在保证水印不可闻性的前提下，水印的检测率在128 kbps时仍保持在90%以上。
— In this paper a novel scheme for watermarking digital audio during its compression to MPEG-1 Layer III format is proposed. For this purpose we slightly modify some of the selected MDCT coefficients, which are used during MPEG audio compression procedure. Due to the possibility of modifying different MDCT coefficients, there will be different choices for embedding the watermark into audio data, considering robustness and transparency factors. Our proposed method uses a genetic algorithm to select the best coefficients to embed the watermark. This genetic selection is done according to the parameters that are extracted from the perceptual content of the audio to optimize the robustness and transparency of the watermark . On the other hand the watermark security is increased due to the random nature of the genetic selection. The information of the selected MDCT coefficients that carry the watermark bits, are saves in a database for future extraction of the watermark. The proposed method is suitable for online MP3 stores to pursue illegal copies of musical artworks. Experimental results show that the detection ratio of the watermarks at the bitrate of 128kbps remains above 90% while the inaudibility of the watermark is preserved.