基于听觉效果的数字音频水印算法的设计

摘要

为了提高音频水印嵌入的数据量和嵌入的效果,提出了一种基于人耳听觉效果的数字音频水印嵌入算法;该算法利用人耳对声音的滞后掩蔽效应,在声音中的一些被屏蔽掉的区域嵌入水印信息.达到扩大水印信息量和减少对音频信息的影响;设计的算法采用过零率和音频信号能量实现水印的嵌入,使用同步信号实现水印信息的定位,利用水印信号和帧段数量的相互关系来实现水印的提取;测试结果表明,该算法具有较强的鲁棒性,能够抵御典型的水印攻击技术.%In order to enhance audio watermark embedding the data quantity and the embedding effect, proposed one kind digital audio watermark embedding algorithm based on the person ear sense of hearing effect. This algorithm uses the lag masking effect in person ear to the sound, embedding watermark information in the sound region which be shielded, achieves the expanded watermark information content and the reduction to the audio information influence. The design algorithm uses the zero crossing rate and the audio signaling energy realizes watermark embedding, realizes the watermark information localization with the synchronized signal, realizes the watermark extraction using the relationship between the watermark signal and the frame number quantity. The test indicated that this algorithm has the strong robustness, can resist the typical watermark attack technology.