一种基于掩蔽效应的音频水印嵌入点寻找技术

An Approach for Finding Appropriate Audio Watermark Segments Based on Auditory Masking

针对音频信号信息隐藏，提出了一种基于人耳掩蔽效应寻找适当嵌入点的方法 。该方法在时域上对音频信号按一定大小进行分帧，计算每一帧若干个临界带宽的掩蔽阈值 ，然后通过与对应子带的能量进行比较来找到适当的嵌入点。当音频帧长度为数十毫秒数量 级时取得了良好的效果。这种技术已成功地应用于一种高度稳健的音频数据隐藏方案中。

An approach of searching the audio for appropriate segments is propo sed in this paper. It computes the AMT(audio masking threshold) of every audio s egments, and compares it to the corresponding audio power spectrum, by which the appropriate segments are found out. This method is effective for short-time aud io frames and has been successfully applied into an audio watermarking project b ased on OFDM.