Echo cancellation strategy usingchaotic modulated speech
- 1 September 1994
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 30 (18) , 1467-1468
- https://doi.org/10.1049/el:19941054
Abstract
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 of 50.3 dB was achieved after only 2000 iterations (250 ms) as opposed to the conventional 23.4 dB over the same interval. Furthermore, the model misadjustment was –17.8 and –82.6 dB after 250 ms of uncoded and chaotic coded speech, respectively.Keywords
This publication has 2 references indexed in Scilit:
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- Chaotic signals and systems for communicationsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1993