arXivDaily arXiv每日学术速递 周一至周五更新
arXiv cs/0407028cs.CL
收藏

语言建模在言语驱动问答中的作用

Effects of Language Modeling on Speech-driven Question Answering

Tomoyosi Akiba, Atsushi Fujii, Katunobu Itou

摘要:

我们将自动语音识别(ASR)和问答(QA)结合起来,实现了一个语音驱动的问答系统,并对其性能进行了评价。我们采用一个N元语言模型来处理自然语言问题,这样我们的系统的输入就可以被识别出很高的准确度。我们针对的是由主题部分和用来询问某事的固定短语组成的WH-问句。我们首先产生一个通用的N-gram模型,用于识别主题并强调与固定短语相对应的N-gram的计数。给定ASR引擎的转录,QA引擎从目标文档中提取答案候选者。我们提出了一个通道检索方法对识别错误的转录鲁棒性。我们使用的QA测试集在NTCIR,这是一个TREC风格的评估工作坊,并通过实验表明我们的方法的有效性。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑