摘要： 提出一种音频信息隐藏算法，该算法利用CDMA扩谱方法对秘密信息进行预处理，使用离散小波变换获得掩护声音的近似系数，将秘密信息嵌入到近似系数的离散余弦变换中频部分。实验结果表明该算法具有较高的信息隐藏容量和较强的鲁棒性，能抵抗幅值规范化、滤波、失真、消噪及其部分组合攻击。

关键词: 信息隐藏, 扩谱, 离散小波变换, 离散余弦变换, 音频

Abstract: This paper proposes an audio information hiding algorithm. It uses CDMA spread spectrum scheme to preprocess secret message, and uses a discrete wavelet transformation to obtain the Approximate Coefficient of the Cover-audio(ACOCA). The preprocessed secret message is embed in the discrete cosine transform domain of the ACOCA. Experimental results show that the proposed algorithm has high capacity and is very robust to wide range of attacks. These attacks include amplitude-normalize, quick filter, special distortion, noise reduction, and these combined attacks.

Key words: information hiding, spread spectrum, Discrete Wavelet Transformation(DWT), Discrete Cosine Transformation(DCT), audio

中图分类号: 

• TP391