一种基于音频特征的自适应量化数字音频水印算法  

Adaptive Digital Audio Watermarking Scheme Based on Digital Audio Characteristic

作　　者：赵红[1] 王向阳[2] 

机构地区：[1]漳州师范学院计算机科学系,福建漳州363000 [2]辽宁师范大学计算机与信息技术学院,辽宁大连116029

出　　处：《小型微型计算机系统》2008年第2期337-340,共4页Journal of Chinese Computer Systems

基　　金：福建省教育厅科技项目(JA06020)资助

摘　　要：针对传统的固定步长量化方法对不同种类音频载体适应性较差的缺点,提出了一种新的自适应量化步长的数字音频盲水印算法.该算法结合音频载体自身特点自适应确定量化步长,大大增强了算法对不同音频载体的适应性.仿真实验表明,该算法对于不同种类音频载体不仅具有较好的不可感知性,并且对于重采样,重量化,噪声,低通滤波及MP3压缩等攻击都具有较好的鲁棒性.The existing quantization audio watermarking algorithms have generally adopted the fixed quantization strategy, which is unavailable for variety kinds of audio. In order to overcome the deficiencies of fixed quantization strategy, a new selfadaptive quantization blind digital audio watermarking is presented in this paper. The proposed method, regulating the quantizatlon step intelligently by utilizing energy characteristic of the audio signals, is remarkably effective in several audio signals. Experimental results show that the proposed watermarking algorithm is imperceptible and robust against various signal processing such as re-sampllng, re-quantifying, noising adding, low pass filtering and MP3 compression.

关 键 词：音频水印 有损压缩 自适应量化 量化步长 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]