话音通信中的数据自适应隐藏算法

基于话音通信的PCM量化编码,导出了数据嵌入强度因子的选取准则,给出了两种自适应选取的实现策略,进而提出了根据载体信号的幅度以及信道的噪声强度自适应调整的数据隐藏算法.隐藏信息为二进制比特数据时,仿真实验结果表明该自适应隐藏方法具有良好的隐蔽信息传输性能.

Adaptive data hiding algorithm in voice communication

Based on the PCM coding in voice communication, the criterions for selecting embedding coefficient which denotes data embedding strength are deduced. Furthermore, two strategies for adaptive selection of coefficients are proposed. An adaptive data hiding algorithm in which the embedding coefficient adjusts with respect to the amplitude of carrier signal and the power of noise in channel is presented in this paper. When the embedded data is represented by binary bits, the simulation results show that presented algorithm has better performance than the approach with fixed embedding coefficient.