Effects of Language Modeling on Speech-driven Question Answering
<|reference_start|>Effects of Language Modeling on Speech-driven Question Answering: We integrate automatic speech recognition (ASR) and question answering (QA) to realize a speech-driven QA system, and evaluate its performance. We adapt an N-gram language model to natural language questions, so that the input of our system can be recognized with a high accuracy. We target WH-questions which consist of the topic part and fixed phrase used to ask about something. We first produce a general N-gram model intended to recognize the topic and emphasize the counts of the N-grams that correspond to the fixed phrases. Given a transcription by the ASR engine, the QA engine extracts the answer candidates from target documents. We propose a passage retrieval method robust against recognition errors in the transcription. We use the QA test collection produced in NTCIR, which is a TREC-style evaluation workshop, and show the effectiveness of our method by means of experiments.<|reference_end|>
@article{akiba2004effects,
    title={Effects of Language Modeling on Speech-driven Question Answering},
    author={Tomoyosi Akiba, Atsushi Fujii, Katunobu Itou},
    journal={Proceedings of the 8th International Conference on Spoken Language
  Processing (ICSLP 2004), pp.1053-1056, Oct. 2004},
    year={2004},
    archivePrefix={arXiv},
    eprint={cs/0407028},
    primaryClass={cs.CL}
}