摘要
提出了一种新的自适应量化数字音频水印算法,利用量化信噪比自适应地确定量化步长,进而利用音频信号的特点来决定水印的嵌入强度.在提取水印时不需要原始的音频信号,所以可实现水印的盲提取.仿真结果表明,该算法不仅具有较好的透明性,而且也对叠加噪声、有损压缩、低通滤波、重新采样等攻击具有较好的鲁棒性.
A new digital audio watermarking algorithm based on adaptive quantization is presented in this paper, The algorithm modifies the quantization step by adaptivelyadjusting the quantified SNR and determines the intensity of the embedded watermark according to features of the audio signal, As a result,watermark extraction does not require knowledge of the original audio signal, allowing blind extraction of the watermark, Simulation results show that the proposed watermarking scheme is not only transparent, but also robust against general signal-processing operations such as noise addition, lossy compression, low pass filtering, and resampling.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2007年第9期1052-1055,共4页
Journal of Harbin Engineering University
