Consolidation-based speech translation and evaluation approach

Chiori Hori, Bing Zhao, Stephan Vogel, Alex Waibel, Hideki Kashioka, Satoshi Nakamura

Research output: Contribution to journalArticle

Abstract

The performance of speech translation systems combining automatic speech recognition (ASR) and machine translation (MT) systems is degraded by redundant and irrelevant information caused by speaker disfluency and recognition errors. This paper proposes a new approach to translating speech recognition results through speech consolidation, which removes ASR errors and disfluencies and extracts meaningful phrases. A consolidation approach is spun off from speech summarization by word extraction from ASR 1-best. We extended the consolidation approach for confusion network (CN) and tested the performance using TED speech and confirmed the consolidation results preserved more meaningful phrases in comparison with the original ASR results. We applied the consolidation technique to speech translation. To test the performance of consolidationbased speech translation, Chinese broadcast news (BN) speech in RT04 were recognized, consolidated and then translated. The speech translation results via consolidation cannot be directly compared with gold standards in which all words in speech are translated because consolidation-based translations are partial translations. We would like to propose a new evaluation framework for partial translation by comparing them with the most similar set of words extracted from a word network created by merging gradual summarizations of the gold standard translation. The performance of consolidation-based MT results was evaluated using BLEU. We also proose Information Preservation Accuracy (IPAccy) and Meaning Preservation Accuracy (MPAccy) to evaluate consolidation and consolidation-based MT. We confirmed that consolidation contributed to the performance of speech translation.

Original languageEnglish
Pages (from-to)477-488
Number of pages12
JournalIEICE Transactions on Information and Systems
VolumeE92-D
Issue number3
DOIs
Publication statusPublished - 1 Jan 2009

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Keywords

  • BLEU
  • Chinese broadcast news speech
  • Chinese-English translation
  • IPAccy
  • MPAccy
  • Speech consolidation
  • Speech translation
  • TED speech

ASJC Scopus subject areas

  • Software
  • Hardware and Architecture
  • Computer Vision and Pattern Recognition
  • Electrical and Electronic Engineering
  • Artificial Intelligence

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