计算机应用研究2009，Vol.26Issue(8)：2989-2991,3.DOI:10.3969/j.issn.1001-3695.2009.08.055
一种DCT域自适应音频水印算法
Adaptive audio watermarking algorithm in DCT domain
摘要
Abstract
The watermarking strength in digital watermarking technology is an important parameter affecting the robustness. Most of watermarking algorithms nowadays make use of experiment to obtain certain the watermarking strength. The results of experiment will be random. So, a lot of experiments have to be done in order to obtain appropriate strength factor. This paper proposed an adaptive audio watermarking strength based on SNR in DCT(discrete cosine transform)domain. Firstly, divided carrier audio into some frames, and then calculated watermarking strength according to SNR which was required by the quality of watermarked audio. Chose the frames that allowed larger strength and embedded a watermarking bit into a DCT direct current coefficient chosen frame. Thus, watermarking strength would be adaptive to the frames. Experimental results demonstrate the algorithm has good robustness. Obtains the conclusion that the algorithm can control watermarking strong by SNR and make good tradeoff of watermarking's roubustness and imperceptibility.关键词
音频水印/离散余弦变换/信噪比/自适应Key words
audio watermarking/DCT/SNR/adaptive分类
信息技术与安全科学引用本文复制引用
黄雄华,王宏霞..一种DCT域自适应音频水印算法[J].计算机应用研究,2009,26(8):2989-2991,3.基金项目
国家自然科学基金资助项目(60702025) （60702025）
高等学校博士学科点专项科研基金资助项目(20070613024) （20070613024）
四川省青年科技基金资助项目(07ZQ026-004) （07ZQ026-004）
