Yuichiro Fukubayashi

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In a speech interface, a gap between a user’s mental model and actual structures of systems tends to be large because the amount of information conveyed by speech is limited. We address dynamic help generation adapted to users, to decrease the gap between them. We defined a domain concept tree as an expression of a system’s actual structure. We estimated(More)
A method is presented that helps novice users understand the language expressions that a system can accept, even from unacceptable utterances made that may contain automatic speech recognition errors. We have developed a method that dynamically generates help messages, which can avoid further unacceptable utterances from being made, by estimating a users’(More)
Language understanding (LU) modules for spoken dialogue systems in the early phases of their development need to be (i) easy to construct and (ii) robust against various expressions. Conventional methods of LU are not suitable for new domains, because they take a great deal of effort to make rules or transcribe and annotate a sufficient corpus for training.(More)
We address an issue of out-of-grammar (OOG) utterances in spoken dialogue systems by generating help messages for novice users. Help generation for OOG utterances is a challenging problem because language understanding (LU) results based on automatic speech recognition (ASR) results for such utterances are always erroneous as important words are often(More)
We address the issue of out-of-grammar (OOG) utterances in spoken dialogue systems by generating help messages. Help message generation for OOG utterances is a challenge because language understanding based on automatic speech recognition (ASR) of OOG utterances is usually erroneous; important words are often misrecognized or missing from such utterances.(More)
1. はじめに 本研究では,音声によるコミュニケーションエラーの 階層性に着目し,適切なヘルプ生成によりユーザ発話を 誘導する対話管理手法の開発を目的としている.これに より,事前教示を与えないユーザに対しても新たな音声 認識誤りを防止し,タスク達成率の向上を狙う. この背景として,音声対話システムにおける,インタ フェースとしてのアフォーダンス [1]の欠如が挙げられる (図 1).つまり音声は,メディアの特性として大量の情 報を一度に出力するのに適さず,またシステムが受理可 能な情報を暗黙に伝えるのも困難であるにもかかわらず, 現状では音声認識誤りが生じた際のユーザへのフィ ドー バックが不十分である.実際,著者らが京都市バス運行 情報案内システム [2]を一般に公開して実ユーザから得(More)
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