Digital Adaptive Echo-Canceller for Room Acoustics Improvement

Advances in Electrical and Computer Engineering

TOPA, M. D. ; MURESAN, I. ; KIREI, B. S. ; HOMANA, I..

关键词: adaptive system identification;    echo-canceller;    reverberation;    room acoustics;    sub-band filtering;   

DOI  :  10.4316/AECE.2010.01008

学科分类：计算机科学（综合）

来源: Universitatea "Stefan cel Mare" din Suceava

【 摘 要 】

This paper presents a method to cancel the echoes generated by reflections in a room. The starting point is the full-band adaptive system identification method, where the unknown system is the room, providing several reflections of the sound. A sub-band filtering method is proposed and all the aspects regarding the filter banks, the structure, the number of sub-bands and the order of the required filters are analyzed. The performance is studied with respect to the provided error and the echo return loss enhancement. The asymmetric structure sub-band filtering offers a better performance than the full-band implementation. Increasing the number of sub-bands will also enhance the performance of the system.

【 授权许可】

Unknown