Quality Analog Scramblers Using Frequency-Response Masking Filter Banks

被引：3
|
作者：
Lim, Y. C. [1 ,2 ]
Lee, J. W. [1 ]
Foo, S. W. [2 ]
机构：
[1] Nanyang Technol Univ, Temasek Labs, Singapore, Singapore
[2] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore, Singapore
来源：
CIRCUITS SYSTEMS AND SIGNAL PROCESSING | 2010年 / 29卷 / 01期
关键词：
Fast Filter Bank; Frequency-response masking; Analog voice scrambling; EXPAND BANDWIDTH; DESIGN; SCHEME;
D O I：
10.1007/s00034-009-9113-8
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 very low complexity frequency-domain analog speech scrambler having high-quality speech reconstruction is proposed. The scrambler uses frequency-response masking filter banks which have low computational complexity and narrow transition widths. The proposed system does not require bandwidth expansion, and is robust for transmission channels with distortion characteristics. Preliminary investigations showed that speech scrambled using this method is nearly unintelligible to the casual eavesdropper.
引用
收藏
页码：135 / 154
页数：20
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