JOURNAL ARTICLE

Partitioned Block Frequency Domain Adaptive Filtering Algorithm for Nonlinear Acoustic Echo Cancellation

Lee

Year: 2015 Journal:   The Journal of the Acoustical Society of Korea Vol: 34 (3)Pages: 177-177   Publisher: The Acoustical Society of Korea

Abstract

본 논문은 음성 통신 환경에서 스피커 모듈 비선형 특성 모델링과 긴 음향 반향 경로에서 효율적으로 동작하는 강인한 비선형 음향 반향 제거기를 제안한다. 제안하는 비선형 음향 반향 제거기는 sigmoid 전처리기를 사용하여 스피커 모듈의 비선형 특성을 모델링하며, 적은 시간 지연으로 긴 음향 반향 경로를 추정할 수 있도록 파티션 블록 주파수 영역 적응 필터를 사용한다. 실험을 통해 스피커 모듈의 비선형 특성이 발생하는 환경에서 제안 비선형 음향 반향 제거기는 기존 비선형 음향 반향 제거기에 비해 적은 연산량으로 우수한 성능을 보임을 확인하였다. This paper proposes a robust nonlinear acoustic echo canceller (NAEC) which is effective for modeling the nonlinearity of a speaker module and the long acoustic echo path within a speech communication environment. The proposed NAEC utilizes a sigmoid pre-processor for modeling the speaker nonlinearity and a partitioned block frequnecy-domain adaptive filter for identifying the acoustic echo path with small delay. Simulation results confirmed that the proposed algorithm achieves excellent performance with much lower computational complexity than the previous NAEC.

Keywords:
Echo (communications protocol) Sigmoid function Computer science Block (permutation group theory) Nonlinear system Adaptive filter Algorithm Frequency domain Path (computing) Filter (signal processing) Domain (mathematical analysis) Speech recognition Acoustics Mathematics Artificial intelligence Artificial neural network Physics Computer vision

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5
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0.19
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Topics

Advanced Adaptive Filtering Techniques
Physical Sciences →  Engineering →  Computational Mechanics
Speech and Audio Processing
Physical Sciences →  Computer Science →  Signal Processing
Blind Source Separation Techniques
Physical Sciences →  Computer Science →  Signal Processing

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