CAJ | 학술논문

设计一种基于混沌和离散余弦变换的语音信号隐藏算法。用混沌序列产生随机的整数序列对秘密语音信号的采样点进行加密，再对载体语音信号进行分段离散余弦变换，将加密后的秘密语音信号嵌入到随机选取的载体中频系数中，且使秘密语音信号嵌入过程中段内系数的变化值适应于系数本身大小，以协调隐蔽性与鲁棒性。利用两段语音信号所进行的隐藏仿真实验表明，所给算法可行，对噪声攻击具有鲁棒性。
설계일충기우혼돈화리산여현변환적어음신호은장산법。용혼돈서렬산생수궤적정수서렬대비밀어음신호적채양점진행가밀，재대재체어음신호진행분단리산여현변환，장가밀후적비밀어음신호감입도수궤선취적재체중빈계수중，차사비밀어음신호감입과정중단내계수적변화치괄응우계수본신대소，이협조은폐성여로봉성。이용량단어음신호소진행적은장방진실험표명，소급산법가행，대조성공격구유로봉성。
A speech signal hiding algorithm based on chaos theory and discrete cosine transform is designed.Use the random integer sequence generated by a chaotic sequence to encrypt the secret speech signal,segment and transfer the carrier speech signal by DCT,embed the encrypted secret speech signal into the random selection intermediate frequency coefficients of the carrier speech signal,coordinate the concealment and robustness by adapting the variation of the coefficients of segment to the coefficients itself,while the secret speech signal is embedded.Simulation experi-ments are carried out on two segments of a speech signal,and the results show that the proposed algorithm is feasible and has robustness to noise attack.