Blind separation and dereverberation of speech mixtures by joint optimization

Takuya Yoshioka*, Tomohiro Nakatani, Masato Miyoshi, Hiroshi G. Okuno

*この研究の対応する著者

研究成果: Article査読

113 被引用数 (Scopus)

抄録

This paper proposes a method for performing blind source separation (BSS) and blind dereverberation (BD) at the same time for speech mixtures. In most previous studies, BSS and BD have been investigated separately. The separation performance of conventional BSS methods deteriorates as the reverberation time increases while many existing BD methods rely on the assumption that there is only one sound source in a room. Therefore, it has been difficult to perform both BSS and BD when the reverberation time is long. The proposed method uses a network, in which dereverberation and separation networks are connected in tandem, to estimate source signals. The parameters for the dereverberation network (prediction matrices) and those for the separation network (separation matrices) are jointly optimized. This enables a BD process to take a BSS process into account. The prediction and separation matrices are alternately optimized with each depending on the other; hence, we call the proposed method the conditional separation and dereverberation (CSD) method. Comprehensive evaluation results are reported, where all the speech materials contained in the complete test set of the TIMIT corpus are used. The CSD method improves the signal-to-interference ratio by an average of about 4 dB over the conventional frequency-domain BSS approach for reverberation times of 0.3 and 0.5 s. The direct-to-reverberation ratio is also improved by about 10 dB.

本文言語English
論文番号5428853
ページ(範囲)69-84
ページ数16
ジャーナルIEEE Transactions on Audio, Speech and Language Processing
19
1
DOI
出版ステータスPublished - 2011
外部発表はい

ASJC Scopus subject areas

  • 電子工学および電気工学
  • 音響学および超音波学

フィンガープリント

「Blind separation and dereverberation of speech mixtures by joint optimization」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル