An audio information hiding technology in DWT(discrete wavelet transform) domain based on chaotic map and modified Patchwork algorithm is presented. A piece of secret speech is hidden in the host audio signal,and can be recovered without loss.

• 基于混沌映射和改进patchwork算法的DWT(discretewavelettransform)域音频信息隐藏技术,实现保密语音在音频信号中的隐藏与恢复。