ECHO CANCELLATION STRATEGY USING CHAOTIC MODULATED SPEECH

被引：9

作者：

ELMIRGHANI, JMH ^{[1
]}

MILNER, SH ^{[1
]}

CRYAN, RA ^{[1
]}

机构：

[1] MANCHESTER METROPOLITAN UNIV,MANCHESTER M1 5GD,LANCS,ENGLAND

来源：

ELECTRONICS LETTERS | 1994年 / 30卷 / 18期

关键词：

SPEECH CODING; ECHO SUPPRESSION; CHAOS;

D O I：

10.1049/el:19941054

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 novel speech coding strategy that can be used for telephony channels and that allows existing echo cancellers to approach their fundamental operating limit is reported. A chaotic-based modulation regime which uses logistic mapping is exploited to whiten the speech PSD. By using the described strategy, an echo attenuation cf 50.3dB was achieved after only 2000 iterations (250ms) as opposed to the conventional 23.4dB over the same interval. Furthermore, the model misadjustment was -17.8 and -82.6dB after 250ms of uncoded and chaotic coded speech, respectively.

引用

页码：1467 / 1468

页数：2