Research on an Improved Driver-response Chaotic Synchronization Voice Encryption Technology

An improved method of voice encryption based on drive-responsive chaotic synchronization is proposed to solve the problem of voice encryption communication with different energy. Based on the drive-responsive chaotic synchronization, a gain link K is added before the drive system and the other gain link
$1/K$
is placed after the responsive system to improve the concealment and quality of signal communication. The system is tested with the standard pronunciation of 26 English alphabets, the best value of parameter
$K$
is obtained by calculating the correlation coefficient, and the new system is verified by the voice signals of different energy. The results show that the improved method effectively solves the effect of amplitude and overcomes the limitation of the drive-responsive chaotic synchronization. The new system accurately restores the originally given voice signal and increases the confidentiality of the signal transmission.