针对MP3压缩域比例因子的音频水印算法

摘要

Scalefactor related information in MP3 bitstream and its function in decoding process are analysed. This paper proposes a digital audio watermarking algorithm for MP3 compression domain. Since the algorithm chooses proper scalefactors, it can effectively control the influence of embedded watermark on original audio media, and the watermark is inaudible, while utilizing chosen conditions the algorithm achieves self-adaptation and implicit synchronization. Simulation experiments show that the proposed algorithm not only has good hearing transparency and robustness, but also embeds and extracts fast enough to meet real-time needs.%分析了MP3码流中比例因子相关信息及其在解码过程中的作用,提出了一种MP3压缩域音频水印算法.该算法能对比例因子进行合理选择,从而有效控制水印嵌入对原始音频的影响,具有良好的听觉透明性,利用选择条件实现了自适应和隐同步.仿真实验表明,该算法不仅具有良好的听觉透明性和较强的鲁棒性,而且嵌入和提取的速度快,能满足实时需求.