An Approach for Echo Cancellation System Based on Improved NLMS Algorithm

Author

Wang, Xinyi ; Shen, Tingzhi ; Wang, Weijiang

Author_Institution

Sch. of Inf. Sci. & Technol., Beijing Inst. of Technol., Beijing

fYear

2007

fDate

21-25 Sept. 2007

Firstpage

2853

Lastpage

2856

Abstract

In telephony application, many NEC adaptation algorithms could not be implemented in real time system because of computational complexity. A novel implementation method for NLMS adaptive filter was presented based on sliding window structure and algorithm delay control technique. This method reduces adaptive filter order and computational complexity. Real time implementation of this new NEC structure was then discussed on a digital video system. Test results show that this new system lowers computational complexity significantly comparing to conventional NLMS adaptive filtering structure and meets with the performance requirement of ITU-T G.168 well.

Keywords

adaptive filters; computational complexity; echo suppression; real-time systems; telephony; ITU-T G.168; NEC adaptation algorithms; NLMS adaptive filter; algorithm delay control technique; computational complexity; digital video system; echo cancellation system; network echo canceller; real time system; sliding window structure; Adaptive filters; Computational complexity; Delay; Echo cancellers; Filtering algorithms; Finite impulse response filter; National electric code; Real time systems; Signal processing; Telephony;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications, Networking and Mobile Computing, 2007. WiCom 2007. International Conference on

Conference_Location

Shanghai

Print_ISBN

978-1-4244-1311-9

Type

conf

DOI

10.1109/WICOM.2007.708

Filename

4340483