電気学会論文誌C(電子・情報・システム部門誌)
Online ISSN : 1348-8155
Print ISSN : 0385-4221
<音声画像処理・認識>
音声と騒音の密度比推定を用いた音声区間検出法
太刀岡 勇気花沢 利行成田 知宏石井 純
著者情報
ジャーナル 認証あり

2013 年 133 巻 8 号 p. 1549-1555

詳細
抄録

In this paper, we propose a robust voice activity detection (VAD) method that uses a density ratio model. For VAD under highly noisy environments, the likelihood ratio test (LRT) is effective. Conventional LRT constructs speech and noise models, calculates the likelihood of each model, and takes the ratio of those likelihoods to detect speech. Although some improved LRT have been proposed, in conventional LRT, it has not been taken into account that the likelihood ratio of speech and noise model is required, not the likelihood of each model. The proposed method directly estimates the likelihood ratio without calculating each likelihood using an density ratio model obtained in advance by density ratio estimation procedure. Moreover, there is the problem of determining thresholds, which are used for VAD and significantly affect its performance. We propose a method that automatically determines thresholds using discriminant analysis. The experiments show that the proposed method is more effective than conventional methods especially under non-stationary noisy environments.

著者関連情報
© 2013 電気学会
前の記事 次の記事
feedback
Top