The 2nd COE Postdoctoral and Doctoral Researchers
Technical Presentation

Date: Thursday, May 27, 2004
Time: 13:30 - 15:30
Place: L1 Lecture room
Language: English (oral presentation), English/Japanese (question)

Program (20 mins each: 15 mins presentation and 5 min discussion)

  1. "Applying Non-Audible Murmur (NAM) microphone in automatic speech recognition systems"
    パニコス イラクレウス ( 音情報処理学講座 : PD )
    Panikos Heracleous ( Speech and Acoustics Lab. : PD )

    [Abstract]
    In this work, we briefly describe the Stethoscopic Non-Audible Murmur (NAM) microphone, and we focus on its application in automatic speech recognition systems. The NAM microphone is attached behind the talker's ear, and can capture very quietly uttered murmur (NAM speech). It is applicable in automatic speech recognition systems, when privacy is important in human-machine communication. Moreover, since the NAM microphone receives the speech signal directly from the body, it shows robustness against the environmental noises. In addition to these, it might be also used in special systems (speech recognition, speech transform, etc.) for sound-impaired people. By applying adaptation techniques, we performed automatic speech recognition experiments for NAM speech. Using Maximum A Posteriori (MAP) adaptation, and a combination with Maximum Likelihood Linear Regression (MLLR) adaptation we achieved for a 20k vocabulary dictation system a 93.5% word accuracy, which is a very promising result.
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  2. "End-to-End Mobility Architecture for Ubiquitous Computing"
    古閑 宏幸 ( インターネット工学講座 : PD )
    Hiroyuki Koga ( Internet Engineering Lab. : PD )

    [Abstract]
    The future pervasive networks will be constructed by various access networks independently. For example, wireless LAN hot spot services will be available at many places, while cellular services which provide wide coverage will also coexist. To realize an efficient mobile computing in such multi-homing environment, mobility support with secure communication and QoS (Quality of Service) provision becomes an important issue as one of key technologies. Therefore, we propose novel End-to-End Association-Based Architecture. In this presentation, I will present our architecture and its fundamental results through empirical evaluation of prototype implementation.
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  3. "CPG-Based Manipulation : Generation of Rhythmic Finger Gaits from Human Observation"
    栗田 雄一 ( ロボティクス講座 : D3 )
    Yuuichi Kurita ( Robotics Lab. : D3 )

    [Abstract]
    A number of researches for the dextrous manipulation have been studied in robotics and physiologic fields independently. Multi-Fingered manipulation for dextrous robot hands should be based on analysis of human skills. The purpose of this study is to apply CPG-based control to the dextrous manipulation. In this paper, CPG-based manipulation is proposed for the rotating manipulation of the dextrous hands. Finger manipulation patterns are investigated when a subject rotates a cylindrical object. Typical contact patterns during rotating manipulation are measured by FSRs. Based on the observation, the neural circuit model which generates a similar contact pattern is constructed. The experimental results by the computer simulation suggest that rotating manipulation can be performed using the constructed CPG model.
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  4. "Question Answering system for NTCIR QAC2"
    高橋 哲朗 ( 自然言語処理学講座 : D3 )
    Tetsuro Takahashi ( Computational Linguistics Lab. : D3)

    [Abstract]
    We attended an evaluation workshop, NTCIR QAC2, which is designed to enhance research in Information Access technologies. The system we presented here is based on our previous one, which utilized a greedy answer seeking model using paraphrasing. We incorporate a re-ranking model for matching questions and passages into the previous system. In the model, we integrated a proximity-based scoring function with the structural-based scoring function. Unfortunately, the result of evaluation shows that our proposed model did not work well. Based on error analysis, we conclude that structural matching-based approaches to answer seeking require technologies for large-scale acquisition of paraphrase patterns.
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  5. "Drive Monitoring System Based on Non-Contact Measurement System of Driver’s Focus of Visual Attention"
    竹村 憲太郎 ( ロボティクス : D2 )
    Kentaro Takemura ( Robotics Lab. : D2 )

    [Abstract]
    In order to realize a driver support system based on the measurement of a driver, it is necessary to adopt non-contact measurement system. In this paper, we present a non-contact measurement system of a driver which acquires facial information in real-time. Recognition of the objects at which the driver is looking and generation of fixation map are possible using the developed system. The feasibility of the system was verified through measurement experiments of a driver at curve run and lane change.
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  6. "New View Synthesis from Omnidirectional Video Images Acquired in Outdoor Environments"
    池田 聖 ( 視覚情報メディア : D2 )
    Sei Ikeda ( Vision and Media Computing Lab. : D2 )

    [Abstract]
    Virtualization of real environments using image-based rendering methods is widely investigated. In the case of virtualization of outdoor environments, however, there still remain some problems, such as increase of image acquisition cost and degradation of accuracy of generated virtualized environments. We propose a new view synthesis method using omnidirectional video images to generate virtualized environments of outdoor scenes. In the proposed methods, a new view synthesis is combined with camera motion estimation of an omnidirectional multi-camera system used for image acquisition, so that high-resolution omnidirectional images at new view position can be nearly automatically generated.
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NAIST Graduate School of Information Science 21st Century COE Program