The mvdr beamformer for speech enhancement

Emanuël A.P. Habets, Jacob Benesty, Sharon Gannot, Israel Cohen

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

38 Scopus citations


The minimum variance distortionless response (MVDR) beamformer is widely studied in the area of speech enhancement and can be used for both speech dereverberation and noise reduction. This chapter summarizes some new insights into the MVDR beamformer. Specifically, the local and global behaviors of the MVDR beamformer are analyzed, different forms of the MVDR beamformer and relations between the MVDR and other optimal beamformers are discussed. In addition, the tradeoff between dereverberation and noise reduction is analyzed. This analysis is done for a mixture of coherent and non-coherent noise fields and entirely non-coherent noise fields. It is shown that maximum noise reduction is achieved when the MVDR beamformer is used for noise reduction only. The amount of noise reduction that is sacrificed when complete dereverberation is required depends on the directto- reverberation ratio of the acoustic impulse response between the source and the reference microphone. The performance evaluation demonstrates the tradeoff between dereverberation and noise reduction.

Original languageEnglish
Title of host publicationSpringer Topics in Signal Processing
PublisherSpringer Science and Business Media B.V.
Number of pages30
StatePublished - 2010

Publication series

NameSpringer Topics in Signal Processing
ISSN (Print)1866-2609
ISSN (Electronic)1866-2617

Bibliographical note

Funding Information:
1 This work was supported by the Israel Science Foundation under Grant 1085/05.

Publisher Copyright:
© Springer Berlin Heidelberg 2010.


  • Microphone Array
  • Noise Reduction
  • Power Spectral Density
  • Reverberation Time
  • Speech Enhancement


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