대한전자공학회:학술대회논문집 (Proceedings of the IEEK Conference)

대한전자공학회 (The Institute of Electronics and Information Engineers)
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ARM9EJ-S Core를 이용한 PBFLMS 음향 반향 제거기 구현

Implementation of Acoustic Echo Canceller Using Robust PBFLMS in noises with ARM9EJ-S Core

  • Yang, Yong-Ho (Dept. Information communication engineering, Chungbuk National University) ;
  • Kim, Jong-Hak (Dept. Information communication engineering, Chungbuk National University) ;
  • Kim, Jeong-Joong (Corelogic Inc.) ;
  • Lee, In-Sung (Dept. Information communication engineering, Chungbuk National University)
  • 발행 : 2006.06.21
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초록

We propose the robust PBFLMS in noises, which is the enhanced acoustic echo canceller using ACPBF-LMS(Alternative Constrained Partitioned Block Frequency domain Least Mean Square) algorithm. The defect of the block structure filtering is the deterioration of convergence efficiency from noise and interference. To improve the performance of convergence efficiency, noise effect should be reduced. The new method of reducing noise effect is proposed, which apply the estimated background noise to adaptive filter step size. By experiments, the proposed acoustic echo canceller has TCL of 50dB, and always provides faster convergence speed and lower complexity than the full-tap NLMS. We also carried out an implementation of PBFLMS using ARM9EJ-S.

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