A fast-converging adaptive frequency-domain MVDR beamformer for speech enhancement

Shengkui Zhao, Douglas L. Jones

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, we present a fast-converging adaptive frequency-domain minimum-variance-distortionlessresponse (MVDR) beamformer (FMV) for speech enhancement. The well-known FMV solution is optimum in the microphone array processing. However, the direct computation of the optimum FMV solution is often undesirable due to the the inversion of the spatio-spectral correlation matrix which is often unstable and is expensive for large arrays. To avoid the matrix inversion, we develop a fast-converging conjugate gradient (CG) algorithm for iteratively computing the FMV solution. Compared to the existing steepest descent (SD) algorithm, the CG algorithm can dramatically improve the convergence speed for the case of multiple interfering signals in speech enhancement. Therefore, the computational load and processing time can be significantly reduced. The speech enhancement experiments using a four-channel acousticvector- sensor (AVS) microphone array are demonstrated for the target speech signal corrupted by two and five interfering speech signals and superior performance are achieved.

Original languageEnglish (US)
Title of host publication13th Annual Conference of the International Speech Communication Association 2012, INTERSPEECH 2012
Pages1928-1931
Number of pages4
StatePublished - Dec 1 2012
Event13th Annual Conference of the International Speech Communication Association 2012, INTERSPEECH 2012 - Portland, OR, United States
Duration: Sep 9 2012Sep 13 2012

Publication series

Name13th Annual Conference of the International Speech Communication Association 2012, INTERSPEECH 2012
Volume3

Other

Other13th Annual Conference of the International Speech Communication Association 2012, INTERSPEECH 2012
CountryUnited States
CityPortland, OR
Period9/9/129/13/12

Keywords

  • Adaptive signal processing
  • Convergence
  • Correlation
  • Microphone arrays
  • Speech enhancement

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Communication

Fingerprint Dive into the research topics of 'A fast-converging adaptive frequency-domain MVDR beamformer for speech enhancement'. Together they form a unique fingerprint.

  • Cite this

    Zhao, S., & Jones, D. L. (2012). A fast-converging adaptive frequency-domain MVDR beamformer for speech enhancement. In 13th Annual Conference of the International Speech Communication Association 2012, INTERSPEECH 2012 (pp. 1928-1931). (13th Annual Conference of the International Speech Communication Association 2012, INTERSPEECH 2012; Vol. 3).