摘要
本文在L.s.Lee(1984,1986)异少模-数-模语音加密方案的基础上提出了自适应伪频插入置乱方法。这种方法有利于降低密话节奏感,提高异步加密方案的保密性,且可保证良好的恢复话音质量。
An adaptive dummy spectrum insertion method which can be applied to L. S. Lee's asynchronous speech scrambler is presented. It is concluded that the method shows high-level security and good voice quality.
基金
国家教委博士点基金资助课题
关键词
语音保密
模-数-模置乱
伪频插入
Speech security
A/D/A scrambler
Dummy spectrum insertion method
