Katunobu Itou

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In this paper, we investigate the answer type detection methods for realizing the Universal Question Answering (UQA), which returns an answer for any given question. For this purpose, the questions collected from a WWW question portal community site were analyzed to see how many kinds of questions were submitted in the real world. Then, we introduce the(More)
Speech recognition has of late become a practical technology for real world applications. Aiming at speech-driven text retrieval, which facilitates retrieving information with spoken queries, we propose a method to integrate speech recognition and retrieval methods. Since users speak contents related to a target collection, we adapt statistical language(More)
In this paper, we propose a driver identification method that is based on the driving behavior signals that are observed while the driver is following another vehicle. Driving behavior signals, such as the use of the accelerator pedal, brake pedal, vehicle velocity, and distance from the vehicle in front, are measured using a driving simulator. We compared(More)
A real-time sound localization/separation system for neareld sound sources was constructed and evaluated in a real o ce environment. As for the sound localization, the experimental results showed that the direction of the two sources was estimated with high accuracy while the range of the sources was estimated with moderate accuracy. As for the sound(More)
This paper describes a method for detecting filled pauses (including word lengthening), which are one of the hesitation phenomena. This detection is important in speech dialogue systems because they play valuable roles in oral communication. Although there have been a few previous speech recognition systems handling filled pauses, they have not detected(More)
This paper presents a virtual push button interface created by drawing a shape or line in the air with a fingertip. As an example of such a gesture-based interface, we developed a four-button interface for entering multi-digit numbers by pushing gestures within an invisible 2x2 button matrix inside a square drawn by the user. Trajectories of fingertip(More)
This paper describes a method for automatically detecting filled (vocalized) pauses, which are one of the hesitation phenomena that current speech recognizers typically cannot handle. The detection of these pauses is important in spontaneous speech dialogue systems because they play valuable roles, such as helping a speaker keep a conversational turn, in(More)