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A New Analysis and a Reduction Method of Computational Complexity for the Lattice Transversal Joint (LTJ) Adaptive Filter  

유재하 (LG전자 디지털미디어 연구소)
Publication Information
The Journal of the Acoustical Society of Korea / v.21, no.5, 2002 , pp. 438-445 More about this Journal
Abstract
In this paper, the necessity of the filter coefficients compensation for the lattice transversal joint (LTJ) adaptive filter was explained in general and with ease by analyzing it with respect to the time-varying transform domain adaptive filter. And also the reduction method of computational complexity for filter coefficients compensation was proposed using the property that speech signal is stationary during a short time period and its effectiveness was verified through experiments using artificial and real speech signals. The proposed adaptive filter reduces the computational complexity for filter coefficients compensation by 95%, and when the filter is applied to the acoustic echo canceller with 1000 taps, the total complexity is reduced by 82%.
Keywords
Lattice transversal joint (LTJ) adaptive filter; Filter coefficients compensation; Acoustic echo canceller; Short-time speech analysis; Transform domain adaptive filer;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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1 /
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