Anchored speech recognition for question answering

Sibel Yaman, Gokhan Tur, Dimitra Vergyri, Dilek Hakkani-Tur, Mary Harper, Wen Wang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, we propose a novel question answering system that searches for responses from spoken documents such as broadcast news stories and conversations. We propose a novel two-step approach, which we refer to as anchored speech recognition, to improve the speech recognition of the sentence that supports the answer. In the first step, the sentence that is highly likely to contain the answer is retrieved among the spoken data that has been transcribed using a generic automatic speech recognition (ASR) system. This candidate sentence is then re-recognized in the second step by constraining the ASR search space using the lexical information in the question. Our analysis showed that ASR errors caused a 35% degradation in the performance of the question answering system. Experiments with the proposed anchored recognition approach indicated a significant improvement in the performance of the question answering module, recovering 30% of the answers erroneous due to ASR.

Original languageEnglish (US)
Title of host publicationNAACL-HLT 2009 - Human Language Technologies
Subtitle of host publication2009 Annual Conference of the North American Chapter of the Association for Computational Linguistics, Short Papers
EditorsMari Ostendorf, Michael Collins, Shri Narayanan, Douglas W. Oard, Lucy Vanderwende
PublisherAssociation for Computational Linguistics (ACL)
Pages265-268
Number of pages4
ISBN (Electronic)9781932432428
StatePublished - 2009
Externally publishedYes
Event2009 Annual Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, NAACL-HLT 2009 - Boulder, United States
Duration: May 31 2009Jun 5 2009

Publication series

NameNAACL-HLT 2009 - Human Language Technologies: 2009 Annual Conference of the North American Chapter of the Association for Computational Linguistics, Short Papers

Conference

Conference2009 Annual Conference of the North American Chapter of the Association for Computational Linguistics: Human Language Technologies, NAACL-HLT 2009
Country/TerritoryUnited States
CityBoulder
Period5/31/096/5/09

ASJC Scopus subject areas

  • Language and Linguistics
  • Linguistics and Language

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