摘要
信息隐藏是一种在不对载体信号产生过多影响的条件下将额外的信息嵌入数字媒体中以实现版权保护、隐蔽通信等功能的技术,回声隐藏是利用音频作载体的一种信息隐藏技术。传统时域扩展回声隐藏技术存在着两个影响水印安全和质量的问题,在此基础上对其算法进行改进,在保证音频质量和降低误码率的同时,使嵌入的水印贯穿到了整个信号,增强了水印的鲁棒性。
Information hiding is a technology which embeds the important data into the digital signal to hide the existence for copyright identification or undercover communication.The echo hiding is one of the information hiding technologies that uses audio as cartier.In this paper we improve conventional arithmetic based on time spread echo hiding which still presents two essential problems with security and quality.Watermark will be permeated the entire signal and robustness will be increased as a result while oreserving audio qualitv and reducing BER value.
出处
《计算机工程与应用》
CSCD
北大核心
2008年第31期119-120,124,共3页
Computer Engineering and Applications
基金
国家自然科学基金No.40751128
国家民委重点科研项目资助(No.MZY02004)~~
关键词
数字音频水印
回声隐藏
时域扩展
误码率
audio watermarking
echo hiding
time spread
Bit Error Rate (BER)