DESIGN OF A DISCRETE COSINE TRANSFORM BASED SPEECH SCRAMBLER

被引：2
|
作者：
DAWSON, E
机构：
[1] School of Mathematics, Queensland University of Technology, Brisbane Q 4001, 1 George Street
来源：
ELECTRONICS LETTERS | 1991年 / 27卷 / 07期
关键词：
ENCODING; SPEECH PROCESSING;
D O I：
10.1049/el:19910385
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A discrete cosine transform based speech-encryption system, suitable for communication over band-limited telephone channels, is described. An energy modification technique is presented which dramatically reduces the residual intelligibility of the scrambled speech. In addition, a method used to reduce the undesirable effects of band limitation is described. Simulation results are included which demonstrate the improved performance of the scheme.
引用
收藏
页码：613 / 614
页数：2
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