Quality Analog Scramblers Using Frequency-Response Masking Filter Banks

Autor:	Jun Wei Lee, Yong Ching Lim, Say Wei Foo
Rok vydání:	2009
Předmět:	Masking (art) Quality (physics) Computational complexity theory Computer science Applied Mathematics Bandwidth expansion Distortion Speech recognition Signal Processing Frequency response masking Electronic engineering Filter (signal processing) Scrambler
Zdroj:	Circuits, Systems and Signal Processing. 29:135-154
ISSN:	1531-5878 0278-081X
DOI:	10.1007/s00034-009-9113-8
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0ccfa2728fec9c71e77c870dbea103a7 https://doi.org/10.1007/s00034-009-9113-8 Zobrazit plný text záznamu Full text from SpringerLink