摘要
讨论了音频数字水印的特性即不可闻性、安全性和稳健性,并重点对基于感知的数字水印音频信息稳健性影响进行了分析研究.这一研究是基于稳健性指标,其方法是使用时间频率表示法,表示了声音信息的频谱特征变化的度量.最后还给出了测试信号和音频信息(语音和音乐)这两种信号的仿真结果.在原始信号与嵌入数字水印的信息之间进行稳定性指标对比,其仿真结果表明嵌入了数字水印信息的信号稳定性明显增强,因此也提高了抵抗攻击的能力.
The specialities of the audio digital watermark, i.e.the unawareness, the security and the stationarity are discussed firstly. And then more attention is paid to analyzing the stationarity of apperception-based digital watermark. This research aims at the stationarity speciality. We take time-frequency representation, which incarnates the change of frequency both on trend and scale. Finally, we offer the simulation result of the testing signal traffic and audio signal traffic. Through the comparison of stationarity between the original traffic and the proposed audio traffic, we believe that the built-in watermark information can greatly improve the stationarity of the traffic; and the signal also becomes more robust to the attack and noise.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2004年第6期93-96,共4页
Engineering Journal of Wuhan University
基金
国家民委重点科研项目资助基金(MZY02004).
关键词
信息安全
版权保护
数字水印
音频信息
稳健性
information security
copyright protection
digital watermarking
audio information
stationarity.
