A new structure for noise and echo cancelers based on a combined fast adaptive filter algorithm

フォーマット:

論文

責任表示:

Wang, Youhua ; Nakayama, Kenji ; Ma, Zhiqiang

言語:

英語

出版情報:

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences = 電子情報通信学会, 1995-07-01

著者名:

• Wang, Youhua
• Nakayama, Kenji
• Ma, Zhiqiang

掲載情報:

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences

ISSN:

0916-8508      

巻:

E78-A

通号:

7

開始ページ:

845

終了ページ:

853

バージョン:

publisher

概要:

金沢大学理工研究域　電子情報学系<br />This paper presents a new structure for noise and echo cancelers based on a combined fast adaptive algorithm. The main purpose of the new structure is to detect both the double-talk and the unknown path change. T … his goal is accomplished by using two adaptive filters. A main adaptive filter Fn, adjusted only in the non-double-talk period by the normalized LMS algorithm, is used for providing the canceler output. An auxiliary adaptive filter Ff, adjusted by the fast RLS algorithm, is used for detecting the double-talk and obtaining a near optimum tap-weight vector for Fn in the initialization period and whenever the unknown path has a sudden or fast change. The proposed structure is examined through computer simulation on a noise cancellation problem. Good cancellation performance and stable operation are obtained when signal is a speech corrupted by a white noise, a colored noise and another speech signal. Simulation results also show that the proposed structure is capable of distinguishing the near-end signal from the noise path change and quickly tracking this change. 続きを見る

URL:

http://hdl.handle.net/2297/18370