异步模-数-模语音加密中的伪频插入置乱方法
A DUMMY SPECTRUM INSERTION ENCRYPTION METHOD USED IN ASYNCHRONOUS SPEECH SCRAMBLER
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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。Abstract: 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.
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L.S.Lee et al.,IEEE Trans.onCOM,COM-32 (1984)4,444-456.[2]L.S.Lee et al.,IEEE J.of SAC., SAC-4(1986)2,280-287.[3]张海林,王育民,胡征,电子学报,19(1991)4,35-39.[4]张海林,模-数-模语音加密的理论与实现,西安电子科技大学博士学位论文,西安,1991年.[5]Akira, Matsunaga, IEEE J. of SAC., SAC-7 (1989)4, 540-547.[6]L. R. Rabiner, R. W. Schafer, Digital Processing of Speech Signals, Prentice-Hall. Inc. New York, (1978). -
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