计算机应用研究2018，Vol.35Issue(1)：222-225,4.DOI:10.3969/j.issn.1001-3695.2018.01.047
音频水印提取算法中降低信号方差的方法
Method of signal variance reduction in audio watermarking extraction algorithm
摘要
Abstract
In the audio watermarking extraction,how to extract the watermark information from the embedded watermarking audio which has been disturbed or attacked,or proves the existence of the watermark information is the key and difficult point.This paper firstly gave a brief description about the audio watermark extraction algorithm,aiming at the effects of the audio signal variance on watermark extraction results.Then it implemented four methods of reducing the audio signal variance and analysed the experiment results in MATLAB.Based on the implementations and filtering results of the four methods,this paper proposed the linear prediction cepstrum filtering method.The experimental results show that the five methods can obviously reduce the amplitude of the sample point and the variance of the signal.And the new method can obtain the better results than others,thus,it can improve the detection rate of watermark.关键词
音频水印检测/信号方差/滤波方法Key words
audio watermarking detection/signal variance/filter method分类
信息技术与安全科学引用本文复制引用
吕冰,陈怡,高戈,刘影..音频水印提取算法中降低信号方差的方法[J].计算机应用研究,2018,35(1):222-225,4.基金项目
国家自然科学基金资助项目(61202470,61471271) （61202470,61471271）
华中师范大学中央高校基本科研业务费资助项目(CCNU15A02017,CCNU14A05016) （CCNU15A02017,CCNU14A05016）
