摘要
以MP3压缩等攻击特点及局部音频相关特性为基础,提出了一种新的混合域数字音频盲水印算法.首先,结合MP3压缩等攻击特点,对原始数字音频进行自适应的分段处理;再对每个音频数据段进行DWT和DCT;最后,结合局部音频特性与听觉掩蔽特性,自适应确定量化步长,并将水印信号嵌入到音频数据段的低频分量中.仿真实验表明,本文算法不仅具有较好的透明性,而且对诸如重新采样、重新量化、叠加噪声、低通滤波等攻击均具有较好的鲁棒性.特别地,该算法对于最为普通的MP3压缩攻击具有极强的抵抗能力.
On the basis of the characteristics of MP3 compression and local audio correlation, a new adaptive digital audio watermarking based on DWT and DCT was proposed. Firstly, the original audio signal was adaptively cut into several audio segments according to the height of the watermark image. Secondly, the DWT and DCT were performed on the audio segments. Finally, the watermark was embedded into the low frequency components by adaptive quantization according to the local audio correlation and human auditory masking. The algorithm can extract the watermark without the help from the original digital audio signal. Experimental results showed that the proposed watermarking algorithm is imperceptible and robust against various signal processing such as re-sampling, re-quantifying, noising adding, MP3 compression and low pass filtering.
出处
《小型微型计算机系统》
CSCD
北大核心
2006年第2期316-319,共4页
Journal of Chinese Computer Systems
基金
辽宁省自然科学基金项目(20032100)资助
信息安全国家重点实验室开放基金(03-02)资助.
关键词
数字水印
人类听觉系统
自适应量化
DWT
DCT
digital watermarking
human auditory system （HAS）
adaptive quantization
DWT
DCT
