关键词: 信息隐藏, 隐蔽通信, 均值量化, DWT, 信噪比, 归一化相关系数

Abstract: We presented a new blind digital audio information hiding algorithms based on DWT and mean quantization. In order to achieve the high imperceptibility, the modification of wavelet coefficients was reduced by piecewise adjustment the quantized area. The ability of resisting attack was also improved by adjustment the boundary value with poor resistance to attack. Experimental results demonstrate that the proposed method has a better Signal Noise Ratio (SNR) than the current mean quantization algorithm, and the Normalized Cross?Correlation (NC) has also a certain amount of improvement.

Key words: nformation hiding, covert communication, mean quantization, DWT, signal noise ratio (SNR), normalized cross?correlation (NC)