摘要
本文研究了在音频信息上实现水印技术的难点与价值,分析和对比了利用音频信号进行信息隐藏的算法,探讨了隐蔽通信的编码策略,提出了一种基于混合模式的语音信号的信息隐藏编码算法。文中首先给出了编码过程中覆盖半径、覆盖编码等相关定义和信息隐藏编码的相关定理,从理论上分析了隐蔽通信编码策略的可行性和步骤;接着详细论证了该编码算法的基本原理、构造方法和算法的实现过程;然后以一段音频信息为例,阐述了隐蔽通信算法的实现方法和编码步骤;最后从算法的频谱分析、隐蔽信息嵌入量和听觉效果三个方面对算法性能进行测试。测试结果表明,算法隐蔽信息嵌入量可达2.1×103bps。
Abstract： This paper studies the watermarking technology by the realization difficulty and the value in the audio infor- mation. After analyzing and contrasting with the algorithm of hiding information in the audio. We discuss the hidden corre- spondence code strategy, propose an information hiding encoding algorithm based on the mix pattern audio signal. In this pa- per we give the code process to cover the radius, the cover code and the related definitions and the information hiding code correlation theorems at first, and theoretically analyze the hiding correspondence code strategy＇s feasibility and the steps. Be- sides,we demonstrate the principle and method of this encoding algorithm in detail. Finally, we take a section of audio infor- mation as the example, elaborate the hidden correspondence algorithm to realize the method and the coding steps. Finally, from the algorithm＇s spectral analysis, the hiding information inserting quantity and the sense of audio effect, we test the algorithm＇s performance, which indicates that the algorithms hidden information emheding quantity may reach 2. 1×10^3 bps.
出处
《计算机工程与科学》
CSCD
北大核心
2010年第8期32-35,共4页
Computer Engineering & Science
基金
广西教育厅科研基金资助项目(200911LX490)
关键词
数字水印
隐蔽通信
算法
音频
混合模式
digital watermark
hiding correspondence
algorithm
audio
mix pattern
