Hirohiko Sagawa

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Sign language gestures are inflected in accordance with the context. To recognize such sign language properly, the structure of sign kmgoage must be made clear. It is well known that the structure of sign Iangoage is represented as a combination of basic components of gestures. Sign language can be recognized by using such components. In this paper, a(More)
In recent years, the number of sign language learners is increasing in Japan. And there are many teaching materials of sign language such as textbooks, videotapes and software for PCs. However, these teaching materials have several problems that learners cannot study sign language sufficiently because the learners can mainly study manual gestures, cannot(More)
This paper presents our recent attempt to make a super-large scale spoken-term detection system, which can detect any keyword uttered in a 2,000-hour speech database within a few seconds. There are three problems to achieve such a system. The system must be able to detect out-of-vocabulary (OOV) terms (OOV problem). The system has to respond to the user(More)
Speech recognition errors are inevitable in a speech dialog system. This paper presents an error handling method based on correction grammars which recognize the correction utterances which follow a recognition error. Correction grammars are dynamically created from existing grammars and a set of correction templates. We also describe a prototype dialog(More)
Statistical Machine Translation (SMT) is a new paradigm in machine translation, which enables highquality translation. However, many translation errors occur in the translation of complex and compound sentences because of the lack of grammatical knowledge about the global structure of a sentence. We adopt the pre-editing method, which divides sentences into(More)
Sign language is one means of communication for hearing-impaired people. Words and sentences in sign language are mainly represented by hands' gestures. In this report, we show a sign language translation system which we are developing. The system translates Japanese sign language into Japanese and vice versa. In this system, hand shape and position data(More)