摘要： 传统的音频信息隐藏方法均不能严格保证有很好的知觉相似性，因而隐蔽性差。该文提出了一种基于全局相位修正的信息隐藏方法，即固定附加相位法。该方法基于人的听觉对音频信号相位信息的不敏感特性，通过修正多帧信号使其具有相同群延迟特性来实现信息隐藏。实验及仿真结果表明，在无信道干扰条件下，与传统各种方法相比，该方法几乎不会导致听觉感知的任何失真，听觉相似性最好，误码率低，适用于宿主载体为高音质的音频信号。

关键词: 音频信号；信息隐藏；听觉感知；相位修正

Abstract: Classical audio information hiding methods do not strictly ensure good sensate similarity, so the hiding performance is bad. This paper puts forward the information hiding method which is based upon whole phase correcting, i.e, the fixed additive phase method. Based on the characteristic of human ear of nonsensitive to audio signal phase, this method realizes information hiding through correcting multi frame signals to reach same group delay. Experiment and simulation results indicate that, at the condition of no channel interferences, compared with classical audio information hiding methods, this method can hardly bring any auditory perception distortion, its sensate similarity is best, and bit error rate is low. So it is fit for high timbre audio frequency host.

Key words: Audio signals; Information hiding; Auditory perception; Phase amending