黄昊,胡涛.一种新的自适应扩频数字音频水印[J].声学技术,2007,(4):723~727 |
一种新的自适应扩频数字音频水印 |
A new scheme of adaptive spread-spectrum audio watermarking |
投稿时间:2006-03-27 修订日期:2006-07-13 |
DOI: |
中文关键词: 音频水印 MCLT 扩频 心理声学模型 |
英文关键词: audio watermarking,MCLT spread-spectrum psycho-acoustic model |
基金项目:安徽省自然科学基金(050420102) |
|
摘要点击次数: 967 |
全文下载次数: 862 |
中文摘要: |
水印技术已经在多媒体版权保护中得到广泛的应用。针对扩频相关性检测模型在实际应用中的问题--短时均值和方差不满足假设,导致检测正确率降低,通过在MCLT变换域嵌入扩频水印,提出了一种新的嵌入强度自适应和检测期望自适应的水印算法。以期获得更高的检测正确率和较好的稳健性,隐蔽性。实验结果表明文中所提出的方法能在人耳不易察觉的情况下消除这种相关检测干扰,并有效抵抗攻击,有很高的检测正确率,对扩频音频水印有一定的参考价值。 |
英文摘要: |
Watermarking has a broad range of applications for multimedia copyright protection.This paper discusses the traditional approach of spread-spectrum audio watermarking and the correlation detection method.By exploring the deviation of mean and variance of original audio signals in practice from the correlation detection model,we present a novel mechanism with adaptive encoding intensity and using the psycho-acoustic model.The purpose is to improve detection convergence and robustness and the water-mark imperceptivity.The proposed mechanism is tested on a benchmark suite including several attacks. |
查看全文
查看/发表评论 下载PDF阅读器 |
关闭 |