Feature enhancement of reverberant speech by distribution matching and non-negative matrix factorization

Sami Keronen, Heikki Kallasjoki, Kalle J. Palomaki, Guy J. Brown, Jort F. Gemmeke

Research output: Contribution to journalArticleScientificpeer-review

119 Downloads (Pure)

Abstract

This paper describes a novel two-stage dereverberation feature enhancement method for noise-robust automatic speech recognition. In the first stage, an estimate of the dereverberated speech is generated by matching the distribution of the observed reverberant speech to that of clean speech, in a decorrelated transformation domain that has a long temporal context in order to address the effects of reverberation. The second stage uses this dereverberated signal as an initial estimate within a non-negative matrix factorization framework, which jointly estimates a sparse representation of the clean speech signal and an estimate of the convolutional distortion. The proposed feature enhancement method, when used in conjunction with automatic speech recognizer back-end processing, is shown to improve the recognition performance compared to three other state-of-the-art techniques.
Original languageEnglish
Article number76
Pages (from-to)1-14
JournalEurasip Journal on Advances in Signal Processing
Volume2015
DOIs
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed

Keywords

  • Speech dereverberation
  • Feature enhancement
  • Non-negative matrix factorization
  • Distribution matching

Fingerprint Dive into the research topics of 'Feature enhancement of reverberant speech by distribution matching and non-negative matrix factorization'. Together they form a unique fingerprint.

  • Cite this