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A New Class of Acoustic Echo Cancelling by Using Correlation LMS Algorithm for DoubleTalk Condition
Rui CHEN Mohammad Reza ASHARIF Iman TABATABAEI ARDEKANI Katsumi YAMASHITA
Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Vol.E87A
No.8
pp.19331940 Publication Date: 2004/08/01 Online ISSN:
DOI: Print ISSN: 09168508 Type of Manuscript: Special Section PAPER (Special Section on Digital Signal Processing) Category: Speech/Acoustic Signal Processing Keyword: echo canceling, LMS algorithm, doubletalk, correlation function, frequency domain, wavelet domain,
Full Text: PDF(570.2KB)>>
Summary:
The conventional algorithms in the echo canceling system have drawback when they are faced with doubletalk condition in noisy environment. Since the doubletalk and noise signal are exist, then the error signal is contaminated to estimate the gradient correctly. In this paper, we define a new class of adaptive algorithm for tap adaptations, based on the correlation function processing. The computer simulation results show that the Correlation LMS (CLMS) and the Extended CLMS (ECLMS) algorithms have better performance than conventional LMS algorithm. In order to implement the ECLMS algorithm, the Frequency domain Extended CLMS (FECLMS) algorithm is proposed to reduce the computational complexity. However the convergence speed is not sufficient. In order to improve the convergence speed, the Wavelet domain Extended CLMS (WECLMS) algorithm is proposed. The computer simulation results support the theoretical findings and verify the robustness of the proposed WECLMS algorithm in the doubletalk situation.

