摘要
该文从感知编码的角度出发，分析数据隐藏算法中可达到的最大理论水印信息隐藏量。在心理声学模型基础上，对于宽带单声道音频信号感知熵取值于3～5bps的范围，这就意味着对于未经压缩的音频信号，大量的水印信号可以添加到原始音频信号当中而不会产生失真。同时在信息论香农定理的基础上，将水印系统看作一种通信模型，分析人耳听觉模型对水印容量的影响。
In this paper we present analysis of the achievable watermark channel data rate in high data rate data hiding applications. On the basis of the psycho- acoustic model, the perceptual entropy for wideband monophonic audio signal is in the range of 3 -5bps, which means that for an uncompressed audio signal, a significant amount of additional information can be inserted into signal without causing a perceptual distortion. In the meanwhile, water- mark system can be regarded as a communication model in order to analyse the influence of human audio system on the watermark capacity.
出处
《杭州电子科技大学学报（自然科学版）》
2006年第6期23-26,共4页
Journal of Hangzhou Dianzi University：Natural Sciences
基金
浙江省自然科学基金(M603021)
关键词
水印容量
人耳听觉模型
感知熵
水印信道通信模型
watermark capacity
human auditory system（HAS）
perceptual entropy
watermark communication model
