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Analyzing the effects of pseudo-optimum tap-length for an MSF-based acoustic echo canceller.
- Source :
-
Applied Acoustics . Jul2019, Vol. 150, p198-206. 9p. - Publication Year :
- 2019
-
Abstract
- Abstract Adaptive multiple subfilters (MSF)-based algorithms have gained attention in recent times for their applications in acoustic echo cancellation (AEC). The most advanced combined-error MSF algorithm maintains a trade-off between the different-error and common-error subfilter-based algorithms, and it is employed for echo cancellation applications which need faster convergence. Variable tap-length adaptive filtering algorithms find the optimum filter length and are used for optimizing the tap-length of the subfilters in MSF-based echo cancellers. In case of a long room impulse response, the MSF-based variable tap-length algorithm achieves a pseudo-optimum tap-length, which renders the overall design undermodelled. Therefore, it becomes necessary to analyze the effects of the undermodelled adaptive filter on the performance of the variable tap-length MSF (VT-MSF)-based echo cancellers. In this paper, we present a mathematical investigation of convergence, steady-state MSE, stability and tracking capability of the VT-MSF echo cancellers having deficient tap-length adaptive subfilters. Simulation results are presented in support of the analysis for the VT-MSF algorithm for AEC. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ECHO
*ADAPTIVE filters
*IMPULSE response
*SOUND reverberation
Subjects
Details
- Language :
- English
- ISSN :
- 0003682X
- Volume :
- 150
- Database :
- Academic Search Index
- Journal :
- Applied Acoustics
- Publication Type :
- Academic Journal
- Accession number :
- 135438581
- Full Text :
- https://doi.org/10.1016/j.apacoust.2019.02.014