摘要
长期以来音频数字水印技术都存在着实用性差的问题,关键在于对不同的音频信号进行水印嵌入时为了满足鲁棒性和不可感知性需人工调试嵌入强度参数,这对于实际应用来说是不现实的。本文在心理声学模型的基础上利用声音的掩蔽效应,将水印嵌入原始音频信号的改变作为一种噪声,通过修改该噪声的幅度,使之小于最小掩蔽阈值。从而在满足水印鲁棒性的基础上使水印信号不可感知。
The audio digital watermark technology has the problem of inferior practicable for long time,because that adjust the parameter need manual work in order to satisfy the robust and imperceptible embeding watermark in the audio signal, this is no reality This paper put forward a algorithm based on psychoacoustic model,used of masking effect of sound,regard the changed original signal embedded the watermark as the noise and make its sound intensity lower than the minmum masking threshold in order to satisfy watermark′s robust and imperceptible
出处
《现代电子技术》
2004年第20期18-21,共4页
Modern Electronics Technique
关键词
音频信号
数字水印
心理声学模型
掩蔽阈值
audio signal
digital watermark
psychoacoustic model
masking threshold
