离散小波变换和正交三角分解相融合的图像水印算法

An Audio Watermarking Algorithm Based on DWT-QR

为了更好地实现音频的内容认证,提出了一种离散小波变换和正交三角分解相融合的音频水印算法。首先对音频分帧,在每一帧前部分嵌入的同步码保证水印的嵌入与检测帧同步,然后在帧后部分采用离散小波变换和正交三角分解把脆弱水印嵌入到高频分量中,最后采用二次混沌加密方法为对印信息进行加密处理,并采用自适应均值量化的方法嵌入水印,实现了盲检测。仿真实验表明,该算法简单、高效、透明性与易碎性强,能较准确地实现对恶意篡改的定位与统计。

In order to better realize the content authentication of audio,a fragile watermarking algorithm is proposed based on DW-QR. Firstly,the audio is divided into frames,then the synchronization code is embedded in the first part of each frame to ensure the frame synchronization both embedding and detection,and the fragile watermark is embedded in high frequency components of DWT-QR. Chaotic encryption which is used twice to ensure the security of watermark image before the watermark embedding. The watermark is embedded by the adaptive mean quantization steps to realize the blind detection. Simulation results show that the algorithm is very simple,efficient,transparent,fragile,and has accurate localization and statistics for tamper.