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Hokkaido University Collection of Scholarly and Academic Papers >
Hokkaido University Sustainability Weeks >
Sustainability Weeks 2009 >
2009 APSIPA Annual Summit and Conference >
Word Boundary Unconstraint Viterbi Search For Robust Speech Recognition
| Title: | Word Boundary Unconstraint Viterbi Search For Robust Speech Recognition |
| Authors: | Chung, Hoon Browse this author | | Lee, SungJoo Browse this author | | Lee, YunKeun Browse this author |
| Keywords: | Keyword-spotting | | acoustic filler model | | Viterbi decoding |
| Issue Date: | 4-Oct-2009 |
| Publisher: | Asia-Pacific Signal and Information Processing Association, 2009 Annual Summit and Conference, International Organizing Committee |
| Journal Title: | Proceedings : APSIPA ASC 2009 : Asia-Pacific Signal and Information Processing Association, 2009 Annual Summit and Conference |
| Start Page: | 627 |
| End Page: | 630 |
| Abstract: | In this paper, we propose a word boundary unconstraint Viterbi algorithm for robust speech recognition against endpoint detection error on isolated word task domain. In general, one-keyword spotting framework is used to achieve robust recognition by absorbing non-speech events with acoustic filler models. One drawback of such an approach is that there is little improvement or it can even hurt performance if unexpected non-speech events occur, whose spectral characteristics are not trained into acoustic filler models. However, it is unrealistic to prepare acoustic filler models considering all kinds of non-speech events especially occurring in mobile environment. Therefore, we propose another approach where non-speech events are absorbed implicitly by relaxing endpoints constraint of Viterbi algorithm. The experimental results show that the algorithm reduces the word error rate from 80.2% to 10.6% for inaccurately endpoint-detected utterances while consuming a little more computation. |
| Description: | APSIPA ASC 2009: Asia-Pacific Signal and Information Processing Association, 2009 Annual Summit and Conference. 4-7 October 2009. Sapporo, Japan. Poster session: Automatic Speech Recognition (6 October 2009). |
| Conference Name: | APSIPA ASC 2009: Asia-Pacific Signal and Information Processing Association, 2009 Annual Summit and Conference | | 2009年アジア太平洋信号情報処理連合学会アニュアルサミット・国際会議 |
| Conference Place: | Sapporo |
| Type: | proceedings |
| URI: | http://hdl.handle.net/2115/39774 |
| Appears in Collections: | 北海道大学サステナビリティ・ウィーク2009 (Sustainability Weeks 2009) > 2009年アジア太平洋信号情報処理連合学会アニュアルサミット・国際会議 (2009 APSIPA Annual Summit and Conference)
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