Microphone array post-filter using input-output ratio of beamformer noise power spectrum

H. Yoon, H. Ko

Research output: Contribution to journalArticle

4 Citations (Scopus)


A generalised Wiener post-filter is proposed to enhance the beamformer output in a microphone array for automatic speech recognition in mobile robot application. Conventional Wiener post-filters are known to perform poorly on suppressing low frequency noise. Proposed is a new post-filter fitting into a generalised Wiener model to reduce low frequency noise more effectively for the purpose of realising robust speech recognition. Experimental results confirm that the proposed post-filter shows significant improvement in terms of speech quality and recognition performance.

Original languageEnglish
Pages (from-to)1003-1005
Number of pages3
JournalElectronics Letters
Issue number18
Publication statusPublished - 2007 Sep 6


ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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